[Android] Add classification and ocr app examples (#676)

* Remove redundant code for segmentation. * Classification Documentation and example improvement. * Ocr Documentation and example improvement. Co-authored-by: DefTruth <31974251+DefTruth@users.noreply.github.com>
2026-04-24 01:29:57 +08:00 · 2022-11-24 16:03:57 +08:00
parent 27e68a04e7
commit 0d68d8a8cc
134 changed files with 10873 additions and 2269 deletions
@@ -0,0 +1,125 @@
+import java.security.MessageDigest
+
+apply plugin: 'com.android.application'
+
+android {
+    compileSdk 28
+
+    defaultConfig {
+        applicationId 'com.baidu.paddle.fastdeploy.app.examples'
+        minSdkVersion 15
+        //noinspection ExpiredTargetSdkVersion
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(include: ['*.aar'], dir: 'libs')
+    implementation 'com.android.support:appcompat-v7:28.0.0'
+    //noinspection GradleDependency
+    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    implementation 'com.android.support:design:28.0.0'
+    implementation 'org.jetbrains:annotations:15.0'
+    //noinspection GradleDependency
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+}
+
+def FD_MODEL = [
+        [
+                'src' : 'https://bj.bcebos.com/paddlehub/fastdeploy/ch_PP-OCRv2_det_infer.tgz',
+                'dest': 'src/main/assets/models'
+        ],
+        [
+                'src' : 'https://bj.bcebos.com/paddlehub/fastdeploy/ch_ppocr_mobile_v2.0_cls_infer.tgz',
+                'dest': 'src/main/assets/models'
+        ],
+        [
+                'src' : 'https://bj.bcebos.com/paddlehub/fastdeploy/ch_PP-OCRv2_rec_infer.tgz',
+                'dest': 'src/main/assets/models'
+        ],
+]
+
+def FD_JAVA_SDK = [
+        [
+                'src' : 'https://bj.bcebos.com/fastdeploy/test/fastdeploy-android-sdk-latest-dev.aar',
+                'dest': 'libs'
+        ]
+]
+
+task downloadAndExtractModels(type: DefaultTask) {
+    doFirst {
+        println "Downloading and extracting fastdeploy models ..."
+    }
+    doLast {
+        String cachePath = "cache"
+        if (!file("${cachePath}").exists()) {
+            mkdir "${cachePath}"
+        }
+        FD_MODEL.eachWithIndex { model, index ->
+            MessageDigest messageDigest = MessageDigest.getInstance('MD5')
+            messageDigest.update(model.src.bytes)
+            String[] modelPaths = model.src.split("/")
+            String modelName = modelPaths[modelPaths.length - 1]
+            // Download the target model if not exists
+            boolean copyFiles = !file("${model.dest}").exists()
+            if (!file("${cachePath}/${modelName}").exists()) {
+                println "Downloading ${model.src} -> ${cachePath}/${modelName}"
+                ant.get(src: model.src, dest: file("${cachePath}/${modelName}"))
+                copyFiles = true
+            }
+            if (copyFiles) {
+                println "Coping ${cachePath}/${modelName} -> ${model.dest}"
+                copy {
+                    from tarTree("${cachePath}/${modelName}")
+                    into "${model.dest}"
+                }
+            }
+        }
+    }
+}
+
+task downloadAndExtractSDKs(type: DefaultTask) {
+    doFirst {
+        println "Downloading and extracting fastdeploy android java sdk ..."
+    }
+    doLast {
+        String cachePath = "cache"
+        if (!file("${cachePath}").exists()) {
+            mkdir "${cachePath}"
+        }
+        FD_JAVA_SDK.eachWithIndex { sdk, index ->
+            String[] sdkPaths = sdk.src.split("/")
+            String sdkName = sdkPaths[sdkPaths.length - 1]
+            // Download the target SDK if not exists
+            boolean copyFiles = !file("${sdk.dest}/${sdkName}").exists()
+            if (!file("${cachePath}/${sdkName}").exists()) {
+                println "Downloading ${sdk.src} -> ${cachePath}/${sdkName}"
+                ant.get(src: sdk.src, dest: file("${cachePath}/${sdkName}"))
+                copyFiles = true
+            }
+            if (copyFiles) {
+                println "Coping ${cachePath}/${sdkName} -> ${sdk.dest}/${sdkName}"
+                copy {
+                    from "${cachePath}/${sdkName}"
+                    into "${sdk.dest}"
+                }
+            }
+        }
+    }
+}
+
+preBuild.dependsOn downloadAndExtractSDKs
+preBuild.dependsOn downloadAndExtractModels
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
@@ -0,0 +1,26 @@
+package com.baidu.paddle.fastdeploy;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.baidu.paddle.fastdeploy", appContext.getPackageName());
+    }
+}
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.baidu.paddle.fastdeploy.app.examples">
+
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.CAMERA"/>
+    <uses-feature android:name="android.hardware.camera" />
+    <uses-feature android:name="android.hardware.camera.autofocus" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".ocr.OcrMainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".ocr.OcrSettingsActivity"
+            android:label="Settings">
+        </activity>
+    </application>
+
+</manifest>
@@ -0,0 +1,500 @@
+package com.baidu.paddle.fastdeploy.app.examples.ocr;
+
+import static com.baidu.paddle.fastdeploy.app.ui.Utils.decodeBitmap;
+import static com.baidu.paddle.fastdeploy.app.ui.Utils.getRealPathFromURI;
+
+import android.Manifest;
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.SystemClock;
+import android.preference.PreferenceManager;
+import android.support.annotation.NonNull;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+import com.baidu.paddle.fastdeploy.RuntimeOption;
+import com.baidu.paddle.fastdeploy.app.examples.R;
+import com.baidu.paddle.fastdeploy.app.ui.view.CameraSurfaceView;
+import com.baidu.paddle.fastdeploy.app.ui.view.ResultListView;
+import com.baidu.paddle.fastdeploy.app.ui.Utils;
+import com.baidu.paddle.fastdeploy.app.ui.view.adapter.BaseResultAdapter;
+import com.baidu.paddle.fastdeploy.app.ui.view.model.BaseResultModel;
+import com.baidu.paddle.fastdeploy.pipeline.PPOCRv2;
+import com.baidu.paddle.fastdeploy.vision.OCRResult;
+import com.baidu.paddle.fastdeploy.vision.Visualize;
+import com.baidu.paddle.fastdeploy.vision.ocr.Classifier;
+import com.baidu.paddle.fastdeploy.vision.ocr.DBDetector;
+import com.baidu.paddle.fastdeploy.vision.ocr.Recognizer;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+public class OcrMainActivity extends Activity implements View.OnClickListener, CameraSurfaceView.OnTextureChangedListener {
+    private static final String TAG = OcrMainActivity.class.getSimpleName();
+
+    CameraSurfaceView svPreview;
+    TextView tvStatus;
+    ImageButton btnSwitch;
+    ImageButton btnShutter;
+    ImageButton btnSettings;
+    ImageView realtimeToggleButton;
+    boolean isRealtimeStatusRunning = false;
+    ImageView backInPreview;
+    private ImageView albumSelectButton;
+    private View cameraPageView;
+    private ViewGroup resultPageView;
+    private ImageView resultImage;
+    private ImageView backInResult;
+    private SeekBar confidenceSeekbar;
+    private TextView seekbarText;
+    private float resultNum = 1.0f;
+    private ResultListView resultView;
+    private Bitmap picBitmap;
+    private Bitmap shutterBitmap;
+    private Bitmap originPicBitmap;
+    private Bitmap originShutterBitmap;
+    private boolean isShutterBitmapCopied = false;
+
+    public static final int TYPE_UNKNOWN = -1;
+    public static final int BTN_SHUTTER = 0;
+    public static final int ALBUM_SELECT = 1;
+    public static final int REALTIME_DETECT = 2;
+    private static int TYPE = REALTIME_DETECT;
+
+    private static final int REQUEST_PERMISSION_CODE_STORAGE = 101;
+    private static final int INTENT_CODE_PICK_IMAGE = 100;
+    private static final int TIME_SLEEP_INTERVAL = 50; // ms
+
+    long timeElapsed = 0;
+    long frameCounter = 0;
+
+    // Call 'init' and 'release' manually later
+    PPOCRv2 predictor = new PPOCRv2();
+
+    private String[] texts;
+    private float[] recScores;
+    private boolean initialized;
+    private List<BaseResultModel> results = new ArrayList<>();
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // Fullscreen
+        requestWindowFeature(Window.FEATURE_NO_TITLE);
+        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
+
+        setContentView(R.layout.ocr_activity_main);
+
+        // Clear all setting items to avoid app crashing due to the incorrect settings
+        initSettings();
+
+        // Check and request CAMERA and WRITE_EXTERNAL_STORAGE permissions
+        if (!checkAllPermissions()) {
+            requestAllPermissions();
+        }
+
+        // Init the camera preview and UI components
+        initView();
+    }
+
+    @SuppressLint("NonConstantResourceId")
+    @Override
+    public void onClick(View v) {
+        switch (v.getId()) {
+            case R.id.btn_switch:
+                svPreview.switchCamera();
+                break;
+            case R.id.btn_shutter:
+                TYPE = BTN_SHUTTER;
+                shutterAndPauseCamera();
+                resultView.setAdapter(null);
+                break;
+            case R.id.btn_settings:
+                startActivity(new Intent(OcrMainActivity.this, OcrSettingsActivity.class));
+                break;
+            case R.id.realtime_toggle_btn:
+                toggleRealtimeStyle();
+                break;
+            case R.id.back_in_preview:
+                finish();
+                break;
+            case R.id.iv_select:
+                TYPE = ALBUM_SELECT;
+                // Judge whether authority has been granted.
+                if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
+                    // If this permission was requested before the application but the user refused the request, this method will return true.
+                    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_PERMISSION_CODE_STORAGE);
+                } else {
+                    Intent intent = new Intent(Intent.ACTION_PICK);
+                    intent.setType("image/*");
+                    startActivityForResult(intent, INTENT_CODE_PICK_IMAGE);
+                }
+                resultView.setAdapter(null);
+                break;
+            case R.id.back_in_result:
+                back();
+                break;
+        }
+    }
+
+    @Override
+    public void onBackPressed() {
+        super.onBackPressed();
+        back();
+    }
+
+    private void back() {
+        resultPageView.setVisibility(View.GONE);
+        cameraPageView.setVisibility(View.VISIBLE);
+        TYPE = REALTIME_DETECT;
+        isShutterBitmapCopied = false;
+        svPreview.onResume();
+        results.clear();
+        if (texts != null) {
+            texts = null;
+        }
+        if (recScores != null) {
+            recScores = null;
+        }
+    }
+
+    private void shutterAndPauseCamera() {
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    // Sleep some times to ensure picture has been correctly shut.
+                    Thread.sleep(TIME_SLEEP_INTERVAL * 10); // 500ms
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+                runOnUiThread(new Runnable() {
+                    @SuppressLint("SetTextI18n")
+                    public void run() {
+                        // These code will run in main thread.
+                        svPreview.onPause();
+                        cameraPageView.setVisibility(View.GONE);
+                        resultPageView.setVisibility(View.VISIBLE);
+                        seekbarText.setText(resultNum + "");
+                        confidenceSeekbar.setProgress((int) (resultNum * 100));
+                        if (shutterBitmap != null && !shutterBitmap.isRecycled()) {
+                            resultImage.setImageBitmap(shutterBitmap);
+                        } else {
+                            new AlertDialog.Builder(OcrMainActivity.this)
+                                    .setTitle("Empty Result!")
+                                    .setMessage("Current picture is empty, please shutting it again!")
+                                    .setCancelable(true)
+                                    .show();
+                        }
+                    }
+                });
+
+            }
+        }).start();
+    }
+
+    private void copyBitmapFromCamera(Bitmap ARGB8888ImageBitmap) {
+        if (isShutterBitmapCopied || ARGB8888ImageBitmap == null) {
+            return;
+        }
+        if (!ARGB8888ImageBitmap.isRecycled()) {
+            synchronized (this) {
+                shutterBitmap = ARGB8888ImageBitmap.copy(Bitmap.Config.ARGB_8888, true);
+                originShutterBitmap = ARGB8888ImageBitmap.copy(Bitmap.Config.ARGB_8888, true);
+            }
+            SystemClock.sleep(TIME_SLEEP_INTERVAL);
+            isShutterBitmapCopied = true;
+        }
+    }
+
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        if (requestCode == INTENT_CODE_PICK_IMAGE) {
+            if (resultCode == Activity.RESULT_OK) {
+                cameraPageView.setVisibility(View.GONE);
+                resultPageView.setVisibility(View.VISIBLE);
+                seekbarText.setText(resultNum + "");
+                confidenceSeekbar.setProgress((int) (resultNum * 100));
+                Uri uri = data.getData();
+                String path = getRealPathFromURI(this, uri);
+                picBitmap = decodeBitmap(path, 720, 1280);
+                originPicBitmap = picBitmap.copy(Bitmap.Config.ARGB_8888, true);
+                resultImage.setImageBitmap(picBitmap);
+            }
+        }
+    }
+
+    private void toggleRealtimeStyle() {
+        if (isRealtimeStatusRunning) {
+            isRealtimeStatusRunning = false;
+            realtimeToggleButton.setImageResource(R.drawable.realtime_stop_btn);
+            svPreview.setOnTextureChangedListener(this);
+            tvStatus.setVisibility(View.VISIBLE);
+        } else {
+            isRealtimeStatusRunning = true;
+            realtimeToggleButton.setImageResource(R.drawable.realtime_start_btn);
+            tvStatus.setVisibility(View.GONE);
+            isShutterBitmapCopied = false;
+            svPreview.setOnTextureChangedListener(new CameraSurfaceView.OnTextureChangedListener() {
+                @Override
+                public boolean onTextureChanged(Bitmap ARGB8888ImageBitmap) {
+                    if (TYPE == BTN_SHUTTER) {
+                        copyBitmapFromCamera(ARGB8888ImageBitmap);
+                    }
+                    return false;
+                }
+            });
+        }
+    }
+
+    @Override
+    public boolean onTextureChanged(Bitmap ARGB8888ImageBitmap) {
+        if (TYPE == BTN_SHUTTER) {
+            copyBitmapFromCamera(ARGB8888ImageBitmap);
+            return false;
+        }
+
+        boolean modified = false;
+
+        long tc = System.currentTimeMillis();
+        OCRResult result = predictor.predict(ARGB8888ImageBitmap);
+        timeElapsed += (System.currentTimeMillis() - tc);
+
+        Visualize.visOcr(ARGB8888ImageBitmap, result);
+        modified = result.initialized();
+
+        frameCounter++;
+        if (frameCounter >= 30) {
+            final int fps = (int) (1000 / (timeElapsed / 30));
+            runOnUiThread(new Runnable() {
+                @SuppressLint("SetTextI18n")
+                public void run() {
+                    tvStatus.setText(Integer.toString(fps) + "fps");
+                }
+            });
+            frameCounter = 0;
+            timeElapsed = 0;
+        }
+        return modified;
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        // Reload settings and re-initialize the predictor
+        checkAndUpdateSettings();
+        // Open camera until the permissions have been granted
+        if (!checkAllPermissions()) {
+            svPreview.disableCamera();
+        } else {
+            svPreview.enableCamera();
+        }
+        svPreview.onResume();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        svPreview.onPause();
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (predictor != null) {
+            predictor.release();
+        }
+        super.onDestroy();
+    }
+
+    public void initView() {
+        TYPE = REALTIME_DETECT;
+        svPreview = (CameraSurfaceView) findViewById(R.id.sv_preview);
+        svPreview.setOnTextureChangedListener(this);
+        tvStatus = (TextView) findViewById(R.id.tv_status);
+        btnSwitch = (ImageButton) findViewById(R.id.btn_switch);
+        btnSwitch.setOnClickListener(this);
+        btnShutter = (ImageButton) findViewById(R.id.btn_shutter);
+        btnShutter.setOnClickListener(this);
+        btnSettings = (ImageButton) findViewById(R.id.btn_settings);
+        btnSettings.setOnClickListener(this);
+        realtimeToggleButton = findViewById(R.id.realtime_toggle_btn);
+        realtimeToggleButton.setOnClickListener(this);
+        backInPreview = findViewById(R.id.back_in_preview);
+        backInPreview.setOnClickListener(this);
+        albumSelectButton = findViewById(R.id.iv_select);
+        albumSelectButton.setOnClickListener(this);
+        cameraPageView = findViewById(R.id.camera_page);
+        resultPageView = findViewById(R.id.result_page);
+        resultImage = findViewById(R.id.result_image);
+        backInResult = findViewById(R.id.back_in_result);
+        backInResult.setOnClickListener(this);
+        confidenceSeekbar = findViewById(R.id.confidence_seekbar);
+        seekbarText = findViewById(R.id.seekbar_text);
+        resultView = findViewById(R.id.result_list_view);
+
+        confidenceSeekbar.setMax(100);
+        confidenceSeekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
+            @Override
+            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+                float resultConfidence = seekBar.getProgress() / 100f;
+                BigDecimal bd = new BigDecimal(resultConfidence);
+                resultNum = bd.setScale(1, BigDecimal.ROUND_HALF_UP).floatValue();
+                seekbarText.setText(resultNum + "");
+                confidenceSeekbar.setProgress((int) (resultNum * 100));
+                results.clear();
+            }
+
+            @Override
+            public void onStartTrackingTouch(SeekBar seekBar) {
+
+            }
+
+            @Override
+            public void onStopTrackingTouch(SeekBar seekBar) {
+                runOnUiThread(new Runnable() {
+                    @Override
+                    public void run() {
+                        if (TYPE == ALBUM_SELECT) {
+                            SystemClock.sleep(TIME_SLEEP_INTERVAL * 10);
+                            detail(picBitmap);
+                            picBitmap = originPicBitmap.copy(Bitmap.Config.ARGB_8888, true);
+                        } else {
+                            SystemClock.sleep(TIME_SLEEP_INTERVAL * 10);
+                            detail(shutterBitmap);
+                            shutterBitmap = originShutterBitmap.copy(Bitmap.Config.ARGB_8888, true);
+                        }
+                    }
+                });
+            }
+        });
+    }
+
+    private void detail(Bitmap bitmap) {
+        OCRResult result = predictor.predict(bitmap, true);
+
+        texts = result.mText;
+        recScores = result.mRecScores;
+
+        initialized = result.initialized();
+        if (initialized) {
+            for (int i = 0; i < texts.length; i++) {
+                if (recScores[i] > resultNum) {
+                    results.add(new BaseResultModel(i + 1, texts[i], recScores[i]));
+                }
+            }
+        }
+        BaseResultAdapter adapter = new BaseResultAdapter(getBaseContext(), R.layout.ocr_result_page_item, results);
+        resultView.setAdapter(adapter);
+        resultView.invalidate();
+
+        resultImage.setImageBitmap(bitmap);
+        resultNum = 1.0f;
+    }
+
+    @SuppressLint("ApplySharedPref")
+    public void initSettings() {
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        SharedPreferences.Editor editor = sharedPreferences.edit();
+        editor.clear();
+        editor.commit();
+        OcrSettingsActivity.resetSettings();
+    }
+
+    public void checkAndUpdateSettings() {
+        if (OcrSettingsActivity.checkAndUpdateSettings(this)) {
+            String realModelDir = getCacheDir() + "/" + OcrSettingsActivity.modelDir;
+            String detModelName = "ch_PP-OCRv2_det_infer";
+            // String detModelName = "ch_ppocr_mobile_v2.0_det_infer";
+            String clsModelName = "ch_ppocr_mobile_v2.0_cls_infer";
+            // String recModelName = "ch_ppocr_mobile_v2.0_rec_infer";
+            String recModelName = "ch_PP-OCRv2_rec_infer";
+            String realDetModelDir = realModelDir + "/" + detModelName;
+            String realClsModelDir = realModelDir + "/" + clsModelName;
+            String realRecModelDir = realModelDir + "/" + recModelName;
+            String srcDetModelDir = OcrSettingsActivity.modelDir + "/" + detModelName;
+            String srcClsModelDir = OcrSettingsActivity.modelDir + "/" + clsModelName;
+            String srcRecModelDir = OcrSettingsActivity.modelDir + "/" + recModelName;
+            Utils.copyDirectoryFromAssets(this, srcDetModelDir, realDetModelDir);
+            Utils.copyDirectoryFromAssets(this, srcClsModelDir, realClsModelDir);
+            Utils.copyDirectoryFromAssets(this, srcRecModelDir, realRecModelDir);
+            String realLabelPath = getCacheDir() + "/" + OcrSettingsActivity.labelPath;
+            Utils.copyFileFromAssets(this, OcrSettingsActivity.labelPath, realLabelPath);
+
+            String detModelFile = realDetModelDir + "/" + "inference.pdmodel";
+            String detParamsFile = realDetModelDir + "/" + "inference.pdiparams";
+            String clsModelFile = realClsModelDir + "/" + "inference.pdmodel";
+            String clsParamsFile = realClsModelDir + "/" + "inference.pdiparams";
+            String recModelFile = realRecModelDir + "/" + "inference.pdmodel";
+            String recParamsFile = realRecModelDir + "/" + "inference.pdiparams";
+            String recLabelFilePath = realLabelPath; // ppocr_keys_v1.txt
+            RuntimeOption detOption = new RuntimeOption();
+            RuntimeOption clsOption = new RuntimeOption();
+            RuntimeOption recOption = new RuntimeOption();
+            detOption.setCpuThreadNum(OcrSettingsActivity.cpuThreadNum);
+            clsOption.setCpuThreadNum(OcrSettingsActivity.cpuThreadNum);
+            recOption.setCpuThreadNum(OcrSettingsActivity.cpuThreadNum);
+            detOption.setLitePowerMode(OcrSettingsActivity.cpuPowerMode);
+            clsOption.setLitePowerMode(OcrSettingsActivity.cpuPowerMode);
+            recOption.setLitePowerMode(OcrSettingsActivity.cpuPowerMode);
+            if (Boolean.parseBoolean(OcrSettingsActivity.enableLiteFp16)) {
+                detOption.enableLiteFp16();
+                clsOption.enableLiteFp16();
+                recOption.enableLiteFp16();
+            }
+            DBDetector detModel = new DBDetector(detModelFile, detParamsFile, detOption);
+            Classifier clsModel = new Classifier(clsModelFile, clsParamsFile, clsOption);
+            Recognizer recModel = new Recognizer(recModelFile, recParamsFile, recLabelFilePath, recOption);
+            predictor.init(detModel, clsModel, recModel);
+
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
+                                           @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        if (grantResults[0] != PackageManager.PERMISSION_GRANTED || grantResults[1] != PackageManager.PERMISSION_GRANTED) {
+            new AlertDialog.Builder(OcrMainActivity.this)
+                    .setTitle("Permission denied")
+                    .setMessage("Click to force quit the app, then open Settings->Apps & notifications->Target " +
+                            "App->Permissions to grant all of the permissions.")
+                    .setCancelable(false)
+                    .setPositiveButton("Exit", new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            OcrMainActivity.this.finish();
+                        }
+                    }).show();
+        }
+    }
+
+    private void requestAllPermissions() {
+        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,
+                Manifest.permission.CAMERA}, 0);
+    }
+
+    private boolean checkAllPermissions() {
+        return ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
+                && ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED;
+    }
+}
@@ -0,0 +1,198 @@
+package com.baidu.paddle.fastdeploy.app.examples.ocr;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.EditTextPreference;
+import android.preference.ListPreference;
+import android.preference.PreferenceManager;
+import android.support.v7.app.ActionBar;
+
+import com.baidu.paddle.fastdeploy.app.examples.R;
+import com.baidu.paddle.fastdeploy.app.ui.Utils;
+import com.baidu.paddle.fastdeploy.app.ui.view.AppCompatPreferenceActivity;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class OcrSettingsActivity extends AppCompatPreferenceActivity implements
+        SharedPreferences.OnSharedPreferenceChangeListener {
+    private static final String TAG = OcrSettingsActivity.class.getSimpleName();
+
+    static public int selectedModelIdx = -1;
+    static public String modelDir = "";
+    static public String labelPath = "";
+    static public int cpuThreadNum = 2;
+    static public String cpuPowerMode = "";
+    static public float scoreThreshold = 0.4f;
+    static public String enableLiteFp16 = "true";
+
+    ListPreference lpChoosePreInstalledModel = null;
+    EditTextPreference etModelDir = null;
+    EditTextPreference etLabelPath = null;
+    ListPreference lpCPUThreadNum = null;
+    ListPreference lpCPUPowerMode = null;
+    EditTextPreference etScoreThreshold = null;
+    ListPreference lpEnableLiteFp16 = null;
+
+    List<String> preInstalledModelDirs = null;
+    List<String> preInstalledLabelPaths = null;
+    List<String> preInstalledCPUThreadNums = null;
+    List<String> preInstalledCPUPowerModes = null;
+    List<String> preInstalledScoreThresholds = null;
+    List<String> preInstalledEnableLiteFp16s = null;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        addPreferencesFromResource(R.xml.ocr_settings);
+        ActionBar supportActionBar = getSupportActionBar();
+        if (supportActionBar != null) {
+            supportActionBar.setDisplayHomeAsUpEnabled(true);
+        }
+
+        // Initialize pre-installed models
+        preInstalledModelDirs = new ArrayList<String>();
+        preInstalledLabelPaths = new ArrayList<String>();
+        preInstalledCPUThreadNums = new ArrayList<String>();
+        preInstalledCPUPowerModes = new ArrayList<String>();
+        preInstalledScoreThresholds = new ArrayList<String>();
+        preInstalledEnableLiteFp16s = new ArrayList<String>();
+        preInstalledModelDirs.add(getString(R.string.OCR_MODEL_DIR_DEFAULT));
+        preInstalledLabelPaths.add(getString(R.string.OCR_REC_LABEL_DEFAULT));
+        preInstalledCPUThreadNums.add(getString(R.string.CPU_THREAD_NUM_DEFAULT));
+        preInstalledCPUPowerModes.add(getString(R.string.CPU_POWER_MODE_DEFAULT));
+        preInstalledScoreThresholds.add(getString(R.string.SCORE_THRESHOLD_DEFAULT));
+        preInstalledEnableLiteFp16s.add(getString(R.string.ENABLE_LITE_FP16_MODE_DEFAULT));
+
+        // Setup UI components
+        lpChoosePreInstalledModel =
+                (ListPreference) findPreference(getString(R.string.CHOOSE_PRE_INSTALLED_MODEL_KEY));
+        String[] preInstalledModelNames = new String[preInstalledModelDirs.size()];
+        for (int i = 0; i < preInstalledModelDirs.size(); i++) {
+            preInstalledModelNames[i] = preInstalledModelDirs.get(i).substring(preInstalledModelDirs.get(i).lastIndexOf("/") + 1);
+        }
+        lpChoosePreInstalledModel.setEntries(preInstalledModelNames);
+        lpChoosePreInstalledModel.setEntryValues(preInstalledModelDirs.toArray(new String[preInstalledModelDirs.size()]));
+        lpCPUThreadNum = (ListPreference) findPreference(getString(R.string.CPU_THREAD_NUM_KEY));
+        lpCPUPowerMode = (ListPreference) findPreference(getString(R.string.CPU_POWER_MODE_KEY));
+        etModelDir = (EditTextPreference) findPreference(getString(R.string.MODEL_DIR_KEY));
+        etModelDir.setTitle("Model dir (SDCard: " + Utils.getSDCardDirectory() + ")");
+        etLabelPath = (EditTextPreference) findPreference(getString(R.string.LABEL_PATH_KEY));
+        etLabelPath.setTitle("Label path (SDCard: " + Utils.getSDCardDirectory() + ")");
+        etScoreThreshold = (EditTextPreference) findPreference(getString(R.string.SCORE_THRESHOLD_KEY));
+        lpEnableLiteFp16 = (ListPreference) findPreference(getString(R.string.ENABLE_LITE_FP16_MODE_KEY));
+    }
+
+    @SuppressLint("ApplySharedPref")
+    private void reloadSettingsAndUpdateUI() {
+        SharedPreferences sharedPreferences = getPreferenceScreen().getSharedPreferences();
+
+        String selected_model_dir = sharedPreferences.getString(getString(R.string.CHOOSE_PRE_INSTALLED_MODEL_KEY),
+                getString(R.string.OCR_MODEL_DIR_DEFAULT));
+        int selected_model_idx = lpChoosePreInstalledModel.findIndexOfValue(selected_model_dir);
+        if (selected_model_idx >= 0 && selected_model_idx < preInstalledModelDirs.size() && selected_model_idx != selectedModelIdx) {
+            SharedPreferences.Editor editor = sharedPreferences.edit();
+            editor.putString(getString(R.string.MODEL_DIR_KEY), preInstalledModelDirs.get(selected_model_idx));
+            editor.putString(getString(R.string.LABEL_PATH_KEY), preInstalledLabelPaths.get(selected_model_idx));
+            editor.putString(getString(R.string.CPU_THREAD_NUM_KEY), preInstalledCPUThreadNums.get(selected_model_idx));
+            editor.putString(getString(R.string.CPU_POWER_MODE_KEY), preInstalledCPUPowerModes.get(selected_model_idx));
+            editor.putString(getString(R.string.SCORE_THRESHOLD_KEY), preInstalledScoreThresholds.get(selected_model_idx));
+            editor.putString(getString(R.string.ENABLE_LITE_FP16_MODE_DEFAULT), preInstalledEnableLiteFp16s.get(selected_model_idx));
+            editor.commit();
+            lpChoosePreInstalledModel.setSummary(selected_model_dir);
+            selectedModelIdx = selected_model_idx;
+        }
+
+        String model_dir = sharedPreferences.getString(getString(R.string.MODEL_DIR_KEY),
+                getString(R.string.OCR_MODEL_DIR_DEFAULT));
+        String label_path = sharedPreferences.getString(getString(R.string.LABEL_PATH_KEY),
+                getString(R.string.OCR_REC_LABEL_DEFAULT));
+        String cpu_thread_num = sharedPreferences.getString(getString(R.string.CPU_THREAD_NUM_KEY),
+                getString(R.string.CPU_THREAD_NUM_DEFAULT));
+        String cpu_power_mode = sharedPreferences.getString(getString(R.string.CPU_POWER_MODE_KEY),
+                getString(R.string.CPU_POWER_MODE_DEFAULT));
+        String score_threshold = sharedPreferences.getString(getString(R.string.SCORE_THRESHOLD_KEY),
+                getString(R.string.SCORE_THRESHOLD_DEFAULT));
+        String enable_lite_fp16 = sharedPreferences.getString(getString(R.string.ENABLE_LITE_FP16_MODE_KEY),
+                getString(R.string.ENABLE_LITE_FP16_MODE_DEFAULT));
+
+        etModelDir.setSummary(model_dir);
+        etLabelPath.setSummary(label_path);
+        lpCPUThreadNum.setValue(cpu_thread_num);
+        lpCPUThreadNum.setSummary(cpu_thread_num);
+        lpCPUPowerMode.setValue(cpu_power_mode);
+        lpCPUPowerMode.setSummary(cpu_power_mode);
+        etScoreThreshold.setSummary(score_threshold);
+        etScoreThreshold.setText(score_threshold);
+        lpEnableLiteFp16.setValue(enable_lite_fp16);
+        lpEnableLiteFp16.setSummary(enable_lite_fp16);
+
+    }
+
+    static boolean checkAndUpdateSettings(Context ctx) {
+        boolean settingsChanged = false;
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(ctx);
+
+        String model_dir = sharedPreferences.getString(ctx.getString(R.string.MODEL_DIR_KEY),
+                ctx.getString(R.string.OCR_MODEL_DIR_DEFAULT));
+        settingsChanged |= !modelDir.equalsIgnoreCase(model_dir);
+        modelDir = model_dir;
+
+        String label_path = sharedPreferences.getString(ctx.getString(R.string.LABEL_PATH_KEY),
+                ctx.getString(R.string.OCR_REC_LABEL_DEFAULT));
+        settingsChanged |= !labelPath.equalsIgnoreCase(label_path);
+        labelPath = label_path;
+
+        String cpu_thread_num = sharedPreferences.getString(ctx.getString(R.string.CPU_THREAD_NUM_KEY),
+                ctx.getString(R.string.CPU_THREAD_NUM_DEFAULT));
+        settingsChanged |= cpuThreadNum != Integer.parseInt(cpu_thread_num);
+        cpuThreadNum = Integer.parseInt(cpu_thread_num);
+
+        String cpu_power_mode = sharedPreferences.getString(ctx.getString(R.string.CPU_POWER_MODE_KEY),
+                ctx.getString(R.string.CPU_POWER_MODE_DEFAULT));
+        settingsChanged |= !cpuPowerMode.equalsIgnoreCase(cpu_power_mode);
+        cpuPowerMode = cpu_power_mode;
+
+        String score_threshold = sharedPreferences.getString(ctx.getString(R.string.SCORE_THRESHOLD_KEY),
+                ctx.getString(R.string.SCORE_THRESHOLD_DEFAULT));
+        settingsChanged |= scoreThreshold != Float.parseFloat(score_threshold);
+        scoreThreshold = Float.parseFloat(score_threshold);
+
+        String enable_lite_fp16 = sharedPreferences.getString(ctx.getString(R.string.ENABLE_LITE_FP16_MODE_KEY),
+                ctx.getString(R.string.ENABLE_LITE_FP16_MODE_DEFAULT));
+        settingsChanged |= !enableLiteFp16.equalsIgnoreCase(enable_lite_fp16);
+        enableLiteFp16 = enable_lite_fp16;
+
+        return settingsChanged;
+    }
+
+    static void resetSettings() {
+        selectedModelIdx = -1;
+        modelDir = "";
+        labelPath = "";
+        cpuThreadNum = 2;
+        cpuPowerMode = "";
+        scoreThreshold = 0.4f;
+        enableLiteFp16 = "true";
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
+        reloadSettingsAndUpdateUI();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        reloadSettingsAndUpdateUI();
+    }
+}
@@ -0,0 +1,313 @@
+package com.baidu.paddle.fastdeploy.app.ui;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.hardware.Camera;
+import android.net.Uri;
+import android.opengl.GLES20;
+import android.os.Environment;
+import android.provider.MediaStore;
+import android.util.Log;
+import android.view.Surface;
+import android.view.WindowManager;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Utils {
+    private static final String TAG = Utils.class.getSimpleName();
+
+    public static void RecursiveCreateDirectories(String fileDir) {
+        String[] fileDirs = fileDir.split("\\/");
+        String topPath = "";
+        for (int i = 0; i < fileDirs.length; i++) {
+            topPath += "/" + fileDirs[i];
+            File file = new File(topPath);
+            if (file.exists()) {
+                continue;
+            } else {
+                file.mkdir();
+            }
+        }
+    }
+
+    public static void copyFileFromAssets(Context appCtx, String srcPath, String dstPath) {
+        if (srcPath.isEmpty() || dstPath.isEmpty()) {
+            return;
+        }
+        String dstDir = dstPath.substring(0, dstPath.lastIndexOf('/'));
+        if (dstDir.length() > 0) {
+            RecursiveCreateDirectories(dstDir);
+        }
+        InputStream is = null;
+        OutputStream os = null;
+        try {
+            is = new BufferedInputStream(appCtx.getAssets().open(srcPath));
+            os = new BufferedOutputStream(new FileOutputStream(new File(dstPath)));
+            byte[] buffer = new byte[1024];
+            int length = 0;
+            while ((length = is.read(buffer)) != -1) {
+                os.write(buffer, 0, length);
+            }
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                os.close();
+                is.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public static void copyDirectoryFromAssets(Context appCtx, String srcDir, String dstDir) {
+        if (srcDir.isEmpty() || dstDir.isEmpty()) {
+            return;
+        }
+        try {
+            if (!new File(dstDir).exists()) {
+                new File(dstDir).mkdirs();
+            }
+            for (String fileName : appCtx.getAssets().list(srcDir)) {
+                String srcSubPath = srcDir + File.separator + fileName;
+                String dstSubPath = dstDir + File.separator + fileName;
+                if (new File(srcSubPath).isDirectory()) {
+                    copyDirectoryFromAssets(appCtx, srcSubPath, dstSubPath);
+                } else {
+                    copyFileFromAssets(appCtx, srcSubPath, dstSubPath);
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static float[] parseFloatsFromString(String string, String delimiter) {
+        String[] pieces = string.trim().toLowerCase().split(delimiter);
+        float[] floats = new float[pieces.length];
+        for (int i = 0; i < pieces.length; i++) {
+            floats[i] = Float.parseFloat(pieces[i].trim());
+        }
+        return floats;
+    }
+
+    public static long[] parseLongsFromString(String string, String delimiter) {
+        String[] pieces = string.trim().toLowerCase().split(delimiter);
+        long[] longs = new long[pieces.length];
+        for (int i = 0; i < pieces.length; i++) {
+            longs[i] = Long.parseLong(pieces[i].trim());
+        }
+        return longs;
+    }
+
+    public static String getSDCardDirectory() {
+        return Environment.getExternalStorageDirectory().getAbsolutePath();
+    }
+
+    public static String getDCIMDirectory() {
+        return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsolutePath();
+    }
+
+    public static Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) {
+        final double ASPECT_TOLERANCE = 0.3;
+        double targetRatio = (double) w / h;
+        if (sizes == null) return null;
+
+        Camera.Size optimalSize = null;
+        double minDiff = Double.MAX_VALUE;
+
+        int targetHeight = h;
+
+        // Try to find an size match aspect ratio and size
+        for (Camera.Size size : sizes) {
+            double ratio = (double) size.width / size.height;
+            if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
+            if (Math.abs(size.height - targetHeight) < minDiff) {
+                optimalSize = size;
+                minDiff = Math.abs(size.height - targetHeight);
+            }
+        }
+
+        // Cannot find the one match the aspect ratio, ignore the requirement
+        if (optimalSize == null) {
+            minDiff = Double.MAX_VALUE;
+            for (Camera.Size size : sizes) {
+                if (Math.abs(size.height - targetHeight) < minDiff) {
+                    optimalSize = size;
+                    minDiff = Math.abs(size.height - targetHeight);
+                }
+            }
+        }
+        return optimalSize;
+    }
+
+    public static int getScreenWidth() {
+        return Resources.getSystem().getDisplayMetrics().widthPixels;
+    }
+
+    public static int getScreenHeight() {
+        return Resources.getSystem().getDisplayMetrics().heightPixels;
+    }
+
+    public static int getCameraDisplayOrientation(Context context, int cameraId) {
+        Camera.CameraInfo info = new Camera.CameraInfo();
+        Camera.getCameraInfo(cameraId, info);
+        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+        int rotation = wm.getDefaultDisplay().getRotation();
+        int degrees = 0;
+        switch (rotation) {
+            case Surface.ROTATION_0:
+                degrees = 0;
+                break;
+            case Surface.ROTATION_90:
+                degrees = 90;
+                break;
+            case Surface.ROTATION_180:
+                degrees = 180;
+                break;
+            case Surface.ROTATION_270:
+                degrees = 270;
+                break;
+        }
+        int result;
+        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
+            result = (info.orientation + degrees) % 360;
+            result = (360 - result) % 360;   // compensate the mirror
+        } else {
+            // back-facing
+            result = (info.orientation - degrees + 360) % 360;
+        }
+        return result;
+    }
+
+    public static int createShaderProgram(String vss, String fss) {
+        int vshader = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
+        GLES20.glShaderSource(vshader, vss);
+        GLES20.glCompileShader(vshader);
+        int[] status = new int[1];
+        GLES20.glGetShaderiv(vshader, GLES20.GL_COMPILE_STATUS, status, 0);
+        if (status[0] == 0) {
+            Log.e(TAG, GLES20.glGetShaderInfoLog(vshader));
+            GLES20.glDeleteShader(vshader);
+            vshader = 0;
+            return 0;
+        }
+
+        int fshader = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
+        GLES20.glShaderSource(fshader, fss);
+        GLES20.glCompileShader(fshader);
+        GLES20.glGetShaderiv(fshader, GLES20.GL_COMPILE_STATUS, status, 0);
+        if (status[0] == 0) {
+            Log.e(TAG, GLES20.glGetShaderInfoLog(fshader));
+            GLES20.glDeleteShader(vshader);
+            GLES20.glDeleteShader(fshader);
+            fshader = 0;
+            return 0;
+        }
+
+        int program = GLES20.glCreateProgram();
+        GLES20.glAttachShader(program, vshader);
+        GLES20.glAttachShader(program, fshader);
+        GLES20.glLinkProgram(program);
+        GLES20.glDeleteShader(vshader);
+        GLES20.glDeleteShader(fshader);
+        GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, status, 0);
+        if (status[0] == 0) {
+            Log.e(TAG, GLES20.glGetProgramInfoLog(program));
+            program = 0;
+            return 0;
+        }
+        GLES20.glValidateProgram(program);
+        GLES20.glGetProgramiv(program, GLES20.GL_VALIDATE_STATUS, status, 0);
+        if (status[0] == 0) {
+            Log.e(TAG, GLES20.glGetProgramInfoLog(program));
+            GLES20.glDeleteProgram(program);
+            program = 0;
+            return 0;
+        }
+
+        return program;
+    }
+
+    public static boolean isSupportedNPU() {
+        String hardware = android.os.Build.HARDWARE;
+        return hardware.equalsIgnoreCase("kirin810") || hardware.equalsIgnoreCase("kirin990");
+    }
+
+    public static Bitmap decodeBitmap(String path, int displayWidth, int displayHeight) {
+        BitmapFactory.Options op = new BitmapFactory.Options();
+        op.inJustDecodeBounds = true;// Only the width and height information of Bitmap is read, not the pixels.
+        Bitmap bmp = BitmapFactory.decodeFile(path, op); // Get size information.
+        int wRatio = (int) Math.ceil(op.outWidth / (float) displayWidth);// Get Scale Size.
+        int hRatio = (int) Math.ceil(op.outHeight / (float) displayHeight);
+        // If the specified size is exceeded, reduce the corresponding scale.
+        if (wRatio > 1 && hRatio > 1) {
+            if (wRatio > hRatio) {
+                // If it is too wide, we will reduce the width to the required size. Note that the height will become smaller.
+                op.inSampleSize = wRatio;
+            } else {
+                op.inSampleSize = hRatio;
+            }
+        }
+        op.inJustDecodeBounds = false;
+        bmp = BitmapFactory.decodeFile(path, op);
+        // Create a Bitmap with a given width and height from the original Bitmap.
+        return Bitmap.createScaledBitmap(bmp, displayWidth, displayHeight, true);
+    }
+
+    public static String getRealPathFromURI(Context context, Uri contentURI) {
+        String result;
+        Cursor cursor = null;
+        try {
+            cursor = context.getContentResolver().query(contentURI, null, null, null, null);
+        } catch (Throwable e) {
+            e.printStackTrace();
+        }
+        if (cursor == null) {
+            result = contentURI.getPath();
+        } else {
+            cursor.moveToFirst();
+            int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
+            result = cursor.getString(idx);
+            cursor.close();
+        }
+        return result;
+    }
+
+    public static List<String> readTxt(String txtPath) {
+        File file = new File(txtPath);
+        if (file.isFile() && file.exists()) {
+            try {
+                FileInputStream fileInputStream = new FileInputStream(file);
+                InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream);
+                BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
+                String text;
+                List<String> labels = new ArrayList<>();
+                while ((text = bufferedReader.readLine()) != null) {
+                    labels.add(text);
+                }
+                return labels;
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+        return null;
+    }
+}
@@ -0,0 +1,33 @@
+package com.baidu.paddle.fastdeploy.app.ui.layout;
+
+import android.content.Context;
+import android.graphics.Color;
+import android.support.annotation.Nullable;
+import android.util.AttributeSet;
+import android.widget.RelativeLayout;
+
+
+public class ActionBarLayout extends RelativeLayout {
+    private int layoutHeight = 150;
+
+    public ActionBarLayout(Context context) {
+        super(context);
+    }
+
+    public ActionBarLayout(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ActionBarLayout(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        int width = MeasureSpec.getSize(widthMeasureSpec);
+        setMeasuredDimension(width, layoutHeight);
+        setBackgroundColor(Color.BLACK);
+        setAlpha(0.9f);
+    }
+}
@@ -0,0 +1,111 @@
+package com.baidu.paddle.fastdeploy.app.ui.view;
+
+import android.content.res.Configuration;
+import android.os.Bundle;
+import android.preference.PreferenceActivity;
+import android.support.annotation.LayoutRes;
+import android.support.annotation.Nullable;
+import android.support.v7.app.ActionBar;
+import android.support.v7.app.AppCompatDelegate;
+import android.support.v7.widget.Toolbar;
+import android.view.MenuInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+/**
+ * A {@link PreferenceActivity} which implements and proxies the necessary calls
+ * to be used with AppCompat.
+ * <p>
+ * This technique can be used with an {@link android.app.Activity} class, not just
+ * {@link PreferenceActivity}.
+ */
+public abstract class AppCompatPreferenceActivity extends PreferenceActivity {
+    private AppCompatDelegate mDelegate;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        getDelegate().installViewFactory();
+        getDelegate().onCreate(savedInstanceState);
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    protected void onPostCreate(Bundle savedInstanceState) {
+        super.onPostCreate(savedInstanceState);
+        getDelegate().onPostCreate(savedInstanceState);
+    }
+
+    public ActionBar getSupportActionBar() {
+        return getDelegate().getSupportActionBar();
+    }
+
+    public void setSupportActionBar(@Nullable Toolbar toolbar) {
+        getDelegate().setSupportActionBar(toolbar);
+    }
+
+    @Override
+    public MenuInflater getMenuInflater() {
+        return getDelegate().getMenuInflater();
+    }
+
+    @Override
+    public void setContentView(@LayoutRes int layoutResID) {
+        getDelegate().setContentView(layoutResID);
+    }
+
+    @Override
+    public void setContentView(View view) {
+        getDelegate().setContentView(view);
+    }
+
+    @Override
+    public void setContentView(View view, ViewGroup.LayoutParams params) {
+        getDelegate().setContentView(view, params);
+    }
+
+    @Override
+    public void addContentView(View view, ViewGroup.LayoutParams params) {
+        getDelegate().addContentView(view, params);
+    }
+
+    @Override
+    protected void onPostResume() {
+        super.onPostResume();
+        getDelegate().onPostResume();
+    }
+
+    @Override
+    protected void onTitleChanged(CharSequence title, int color) {
+        super.onTitleChanged(title, color);
+        getDelegate().setTitle(title);
+    }
+
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+        getDelegate().onConfigurationChanged(newConfig);
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        getDelegate().onStop();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        getDelegate().onDestroy();
+    }
+
+    public void invalidateOptionsMenu() {
+        getDelegate().invalidateOptionsMenu();
+    }
+
+    private AppCompatDelegate getDelegate() {
+        if (mDelegate == null) {
+            mDelegate = AppCompatDelegate.create(this, null);
+        }
+        return mDelegate;
+    }
+}
@@ -0,0 +1,353 @@
+package com.baidu.paddle.fastdeploy.app.ui.view;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.SurfaceTexture;
+import android.hardware.Camera;
+import android.hardware.Camera.CameraInfo;
+import android.hardware.Camera.Size;
+import android.opengl.GLES11Ext;
+import android.opengl.GLES20;
+import android.opengl.GLSurfaceView;
+import android.opengl.GLSurfaceView.Renderer;
+import android.opengl.GLUtils;
+import android.opengl.Matrix;
+import android.os.SystemClock;
+import android.util.AttributeSet;
+import android.util.Log;
+
+import com.baidu.paddle.fastdeploy.app.ui.Utils;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import java.util.List;
+
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.opengles.GL10;
+
+public class CameraSurfaceView extends GLSurfaceView implements Renderer,
+        SurfaceTexture.OnFrameAvailableListener {
+    private static final String TAG = CameraSurfaceView.class.getSimpleName();
+
+    public static int EXPECTED_PREVIEW_WIDTH = 1280;  // 1920
+    public static int EXPECTED_PREVIEW_HEIGHT = 720;  // 960
+
+    protected int numberOfCameras;
+    protected int selectedCameraId;
+    protected boolean disableCamera = false;
+    protected Camera camera;
+
+    protected Context context;
+    protected SurfaceTexture surfaceTexture;
+    protected int surfaceWidth = 0;
+    protected int surfaceHeight = 0;
+    protected int textureWidth = 0;
+    protected int textureHeight = 0;
+
+    protected Bitmap ARGB8888ImageBitmap;
+    protected boolean bitmapReleaseMode = true;
+
+    // In order to manipulate the camera preview data and render the modified one
+    // to the screen, three textures are created and the data flow is shown as following:
+    // previewdata->camTextureId->fboTexureId->drawTexureId->framebuffer
+    protected int[] fbo = {0};
+    protected int[] camTextureId = {0};
+    protected int[] fboTexureId = {0};
+    protected int[] drawTexureId = {0};
+
+    private final String vss = ""
+            + "attribute vec2 vPosition;\n"
+            + "attribute vec2 vTexCoord;\n" + "varying vec2 texCoord;\n"
+            + "void main() {\n" + "  texCoord = vTexCoord;\n"
+            + "  gl_Position = vec4 (vPosition.x, vPosition.y, 0.0, 1.0);\n"
+            + "}";
+
+    private final String fssCam2FBO = ""
+            + "#extension GL_OES_EGL_image_external : require\n"
+            + "precision mediump float;\n"
+            + "uniform samplerExternalOES sTexture;\n"
+            + "varying vec2 texCoord;\n"
+            + "void main() {\n"
+            + "  gl_FragColor = texture2D(sTexture,texCoord);\n" + "}";
+
+    private final String fssTex2Screen = ""
+            + "precision mediump float;\n"
+            + "uniform sampler2D sTexture;\n"
+            + "varying vec2 texCoord;\n"
+            + "void main() {\n"
+            + "  gl_FragColor = texture2D(sTexture,texCoord);\n" + "}";
+
+    private final float[] vertexCoords = {
+            -1, -1,
+            -1, 1,
+            1, -1,
+            1, 1};
+    private float[] textureCoords = {
+            0, 1,
+            0, 0,
+            1, 1,
+            1, 0};
+
+    private FloatBuffer vertexCoordsBuffer;
+    private FloatBuffer textureCoordsBuffer;
+
+    private int progCam2FBO = -1;
+    private int progTex2Screen = -1;
+    private int vcCam2FBO;
+    private int tcCam2FBO;
+    private int vcTex2Screen;
+    private int tcTex2Screen;
+
+    public void setBitmapReleaseMode(boolean mode) {
+        synchronized (this) {
+            bitmapReleaseMode = mode;
+        }
+    }
+
+    public Bitmap getBitmap() {
+        return ARGB8888ImageBitmap; // may null or recycled.
+    }
+
+    public interface OnTextureChangedListener {
+        boolean onTextureChanged(Bitmap ARGB8888ImageBitmap);
+    }
+
+    private OnTextureChangedListener onTextureChangedListener = null;
+
+    public void setOnTextureChangedListener(OnTextureChangedListener listener) {
+        onTextureChangedListener = listener;
+    }
+
+    public CameraSurfaceView(Context ctx, AttributeSet attrs) {
+        super(ctx, attrs);
+        context = ctx;
+        setEGLContextClientVersion(2);
+        setRenderer(this);
+        setRenderMode(RENDERMODE_WHEN_DIRTY);
+
+        // Find the total number of available cameras and the ID of the default camera
+        numberOfCameras = Camera.getNumberOfCameras();
+        CameraInfo cameraInfo = new CameraInfo();
+        for (int i = 0; i < numberOfCameras; i++) {
+            Camera.getCameraInfo(i, cameraInfo);
+            if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) {
+                selectedCameraId = i;
+            }
+        }
+    }
+
+    @Override
+    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
+        // Create OES texture for storing camera preview data(YUV format)
+        GLES20.glGenTextures(1, camTextureId, 0);
+        GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, camTextureId[0]);
+        GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
+        GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
+        GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
+        GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
+        surfaceTexture = new SurfaceTexture(camTextureId[0]);
+        surfaceTexture.setOnFrameAvailableListener(this);
+
+        // Prepare vertex and texture coordinates
+        int bytes = vertexCoords.length * Float.SIZE / Byte.SIZE;
+        vertexCoordsBuffer = ByteBuffer.allocateDirect(bytes).order(ByteOrder.nativeOrder()).asFloatBuffer();
+        textureCoordsBuffer = ByteBuffer.allocateDirect(bytes).order(ByteOrder.nativeOrder()).asFloatBuffer();
+        vertexCoordsBuffer.put(vertexCoords).position(0);
+        textureCoordsBuffer.put(textureCoords).position(0);
+
+        // Create vertex and fragment shaders
+        // camTextureId->fboTexureId
+        progCam2FBO = Utils.createShaderProgram(vss, fssCam2FBO);
+        vcCam2FBO = GLES20.glGetAttribLocation(progCam2FBO, "vPosition");
+        tcCam2FBO = GLES20.glGetAttribLocation(progCam2FBO, "vTexCoord");
+        GLES20.glEnableVertexAttribArray(vcCam2FBO);
+        GLES20.glEnableVertexAttribArray(tcCam2FBO);
+        // fboTexureId/drawTexureId -> screen
+        progTex2Screen = Utils.createShaderProgram(vss, fssTex2Screen);
+        vcTex2Screen = GLES20.glGetAttribLocation(progTex2Screen, "vPosition");
+        tcTex2Screen = GLES20.glGetAttribLocation(progTex2Screen, "vTexCoord");
+        GLES20.glEnableVertexAttribArray(vcTex2Screen);
+        GLES20.glEnableVertexAttribArray(tcTex2Screen);
+    }
+
+    @Override
+    public void onSurfaceChanged(GL10 gl, int width, int height) {
+        surfaceWidth = width;
+        surfaceHeight = height;
+        openCamera();
+    }
+
+    @Override
+    public void onDrawFrame(GL10 gl) {
+        if (surfaceTexture == null) return;
+
+        GLES20.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
+        surfaceTexture.updateTexImage();
+        float[] matrix = new float[16];
+        surfaceTexture.getTransformMatrix(matrix);
+
+        // camTextureId->fboTexureId
+        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fbo[0]);
+        GLES20.glViewport(0, 0, textureWidth, textureHeight);
+        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
+        GLES20.glUseProgram(progCam2FBO);
+        GLES20.glVertexAttribPointer(vcCam2FBO, 2, GLES20.GL_FLOAT, false, 4 * 2, vertexCoordsBuffer);
+        textureCoordsBuffer.clear();
+        textureCoordsBuffer.put(transformTextureCoordinates(textureCoords, matrix));
+        textureCoordsBuffer.position(0);
+        GLES20.glVertexAttribPointer(tcCam2FBO, 2, GLES20.GL_FLOAT, false, 4 * 2, textureCoordsBuffer);
+        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
+        GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, camTextureId[0]);
+        GLES20.glUniform1i(GLES20.glGetUniformLocation(progCam2FBO, "sTexture"), 0);
+        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
+        GLES20.glFlush();
+
+        // Check if the draw texture is set
+        int targetTexureId = fboTexureId[0];
+        if (onTextureChangedListener != null) {
+            // Read pixels of FBO to a bitmap
+            ByteBuffer pixelBuffer = ByteBuffer.allocate(textureWidth * textureHeight * 4);
+            GLES20.glReadPixels(0, 0, textureWidth, textureHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, pixelBuffer);
+
+            ARGB8888ImageBitmap = Bitmap.createBitmap(textureWidth, textureHeight, Bitmap.Config.ARGB_8888);
+            ARGB8888ImageBitmap.copyPixelsFromBuffer(pixelBuffer);
+
+            boolean modified = onTextureChangedListener.onTextureChanged(ARGB8888ImageBitmap);
+
+            if (modified) {
+                targetTexureId = drawTexureId[0];
+                // Update a bitmap to the GL texture if modified
+                GLES20.glActiveTexture(targetTexureId);
+                // GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, targetTexureId);
+                GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, targetTexureId);
+                GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, ARGB8888ImageBitmap, 0);
+            }
+            if (bitmapReleaseMode) {
+                ARGB8888ImageBitmap.recycle();
+            }
+        }
+
+        // fboTexureId/drawTexureId->Screen
+        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
+        GLES20.glViewport(0, 0, surfaceWidth, surfaceHeight);
+        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
+        GLES20.glUseProgram(progTex2Screen);
+        GLES20.glVertexAttribPointer(vcTex2Screen, 2, GLES20.GL_FLOAT, false, 4 * 2, vertexCoordsBuffer);
+        textureCoordsBuffer.clear();
+        textureCoordsBuffer.put(textureCoords);
+        textureCoordsBuffer.position(0);
+        GLES20.glVertexAttribPointer(tcTex2Screen, 2, GLES20.GL_FLOAT, false, 4 * 2, textureCoordsBuffer);
+        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
+        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, targetTexureId);
+        GLES20.glUniform1i(GLES20.glGetUniformLocation(progTex2Screen, "sTexture"), 0);
+        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
+        GLES20.glFlush();
+    }
+
+    private float[] transformTextureCoordinates(float[] coords, float[] matrix) {
+        float[] result = new float[coords.length];
+        float[] vt = new float[4];
+        for (int i = 0; i < coords.length; i += 2) {
+            float[] v = {coords[i], coords[i + 1], 0, 1};
+            Matrix.multiplyMV(vt, 0, matrix, 0, v, 0);
+            result[i] = vt[0];
+            result[i + 1] = vt[1];
+        }
+        return result;
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        releaseCamera();
+    }
+
+    @Override
+    public void onFrameAvailable(SurfaceTexture surfaceTexture) {
+        requestRender();
+    }
+
+    public void disableCamera() {
+        disableCamera = true;
+    }
+
+    public void enableCamera() {
+        disableCamera = false;
+    }
+
+    public void switchCamera() {
+        releaseCamera();
+        selectedCameraId = (selectedCameraId + 1) % numberOfCameras;
+        openCamera();
+    }
+
+    public void openCamera() {
+        if (disableCamera) return;
+        camera = Camera.open(selectedCameraId);
+        List<Size> supportedPreviewSizes = camera.getParameters().getSupportedPreviewSizes();
+        Size previewSize = Utils.getOptimalPreviewSize(supportedPreviewSizes, EXPECTED_PREVIEW_WIDTH,
+                EXPECTED_PREVIEW_HEIGHT);
+        Camera.Parameters parameters = camera.getParameters();
+        parameters.setPreviewSize(previewSize.width, previewSize.height);
+        if (parameters.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
+            parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
+        }
+        camera.setParameters(parameters);
+        int degree = Utils.getCameraDisplayOrientation(context, selectedCameraId);
+        camera.setDisplayOrientation(degree);
+        boolean rotate = degree == 90 || degree == 270;
+        textureWidth = rotate ? previewSize.height : previewSize.width;
+        textureHeight = rotate ? previewSize.width : previewSize.height;
+        // Destroy FBO and draw textures
+        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
+        GLES20.glDeleteFramebuffers(1, fbo, 0);
+        GLES20.glDeleteTextures(1, drawTexureId, 0);
+        GLES20.glDeleteTextures(1, fboTexureId, 0);
+        // Normal texture for storing modified camera preview data(RGBA format)
+        GLES20.glGenTextures(1, drawTexureId, 0);
+        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, drawTexureId[0]);
+        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, textureWidth, textureHeight, 0,
+                GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, null);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
+        // FBO texture for storing camera preview data(RGBA format)
+        GLES20.glGenTextures(1, fboTexureId, 0);
+        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, fboTexureId[0]);
+        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, textureWidth, textureHeight, 0,
+                GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, null);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
+        // Generate FBO and bind to FBO texture
+        GLES20.glGenFramebuffers(1, fbo, 0);
+        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fbo[0]);
+        GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0, GLES20.GL_TEXTURE_2D,
+                fboTexureId[0], 0);
+        try {
+            camera.setPreviewTexture(surfaceTexture);
+        } catch (IOException exception) {
+            Log.e(TAG, "IOException caused by setPreviewDisplay()", exception);
+        }
+        camera.startPreview();
+    }
+
+    public void releaseCamera() {
+        if (camera != null) {
+            camera.setPreviewCallback(null);
+            camera.stopPreview();
+            camera.release();
+            camera = null;
+        }
+    }
+}
@@ -0,0 +1,43 @@
+package com.baidu.paddle.fastdeploy.app.ui.view;
+
+import android.content.Context;
+import android.os.Handler;
+import android.util.AttributeSet;
+import android.widget.ListView;
+
+public class ResultListView extends ListView {
+    public ResultListView(Context context) {
+        super(context);
+    }
+
+    public ResultListView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ResultListView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    private Handler handler;
+
+    public void setHandler(Handler mHandler) {
+        handler = mHandler;
+    }
+
+    public void clear() {
+        handler.post(new Runnable() {
+            @Override
+            public void run() {
+                removeAllViewsInLayout();
+                invalidate();
+            }
+        });
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
+                MeasureSpec.AT_MOST);
+        super.onMeasure(widthMeasureSpec, expandSpec);
+    }
+}
@@ -0,0 +1,48 @@
+package com.baidu.paddle.fastdeploy.app.ui.view.adapter;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+
+import com.baidu.paddle.fastdeploy.app.examples.R;
+import com.baidu.paddle.fastdeploy.app.ui.view.model.BaseResultModel;
+
+import java.text.DecimalFormat;
+import java.util.List;
+
+public class BaseResultAdapter extends ArrayAdapter<BaseResultModel> {
+    private int resourceId;
+
+    public BaseResultAdapter(@NonNull Context context, int resource) {
+        super(context, resource);
+    }
+
+    public BaseResultAdapter(@NonNull Context context, int resource, @NonNull List<BaseResultModel> objects) {
+        super(context, resource, objects);
+        resourceId = resource;
+    }
+
+    @NonNull
+    @Override
+    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
+        BaseResultModel model = getItem(position);
+        View view = LayoutInflater.from(getContext()).inflate(resourceId, null);
+        TextView indexText = (TextView) view.findViewById(R.id.index);
+        TextView nameText = (TextView) view.findViewById(R.id.name);
+        TextView confidenceText = (TextView) view.findViewById(R.id.confidence);
+        indexText.setText(String.valueOf(model.getIndex()));
+        nameText.setText(String.valueOf(model.getName()));
+        confidenceText.setText(formatFloatString(model.getConfidence()));
+        return view;
+    }
+
+    public static String formatFloatString(float number) {
+        DecimalFormat df = new DecimalFormat("0.00");
+        return df.format(number);
+    }
+}
@@ -0,0 +1,41 @@
+package com.baidu.paddle.fastdeploy.app.ui.view.model;
+
+public class BaseResultModel {
+    private int index;
+    private String name;
+    private float confidence;
+
+    public BaseResultModel() {
+
+    }
+
+    public BaseResultModel(int index, String name, float confidence) {
+        this.index = index;
+        this.name = name;
+        this.confidence = confidence;
+    }
+
+    public float getConfidence() {
+        return confidence;
+    }
+
+    public void setConfidence(float confidence) {
+        this.confidence = confidence;
+    }
+
+    public int getIndex() {
+        return index;
+    }
+
+    public void setIndex(int index) {
+        this.index = index;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape>
+            <solid android:color="@color/textColorHighlight" />
+        </shape>
+    </item>
+    <!--这里的right和bottom表示的是这一层图片的右边距和下边距，当然还有left和top-->
+    <item android:bottom="5px">
+        <shape>
+            <solid android:color="@color/bk_black" />
+        </shape>
+    </item>
+</layer-list>
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true" android:drawable="@drawable/album" />
+    <item android:state_focused="true" android:drawable="@drawable/album" />
+    <item android:state_pressed="true" android:drawable="@drawable/album" />
+    <item android:drawable="@drawable/album_pressed" />
+</selector>
@@ -0,0 +1,34 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true" android:drawable="@drawable/realtime_start_pressed" />
+    <item android:state_focused="true" android:drawable="@drawable/realtime_start_pressed" />
+    <item android:state_pressed="true" android:drawable="@drawable/realtime_start_pressed" />
+    <item android:drawable="@drawable/realtime_start" />
+</selector>
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true" android:drawable="@drawable/realtime_stop_pressed" />
+    <item android:state_focused="true" android:drawable="@drawable/realtime_stop_pressed" />
+    <item android:state_pressed="true" android:drawable="@drawable/realtime_stop_pressed" />
+    <item android:drawable="@drawable/realtime_stop" />
+</selector>
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="#FFFFFF" />
+
+            <stroke
+                android:width="1px"
+                android:color="#E5E5E5" />
+        </shape>
+    </item>
+</layer-list>
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners
+        android:bottomLeftRadius="25dp"
+        android:bottomRightRadius="25dp"
+        android:topLeftRadius="25dp"
+        android:topRightRadius="25dp"></corners>
+    <solid android:color="#3B85F5"></solid>
+</shape>
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!--定义seekbar滑动条的底色-->
+    <item android:id="@android:id/background">
+        <bitmap
+            android:src="@drawable/seekbar_progress_dotted"
+            android:tileMode="mirror"></bitmap>
+    </item>
+    <!--定义seekbar滑动条进度颜色-->
+    <item android:id="@android:id/progress">
+        <clip>
+            <shape>
+                <solid android:color="#F5A623" />
+            </shape>
+        </clip>
+    </item>
+</layer-list>
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!--定义seekbar滑动条的底色-->
+    <item android:id="@android:id/background">
+        <shape>
+            <solid android:color="#E5E5E5" />
+        </shape>
+    </item>
+    <!--定义seekbar滑动条进度颜色-->
+    <item android:id="@android:id/progress">
+        <clip>
+            <shape>
+                <solid android:color="#3B85F5" />
+            </shape>
+        </clip>
+    </item>
+</layer-list>
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <selector>
+        <item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/seekbar_thumb_shape" />
+        <item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/seekbar_thumb_shape" />
+        <item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/seekbar_thumb_shape" />
+        <item android:drawable="@drawable/seekbar_thumb_shape" />
+    </selector>
+</selector>
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- 白色前景 -->
+    <item
+        android:gravity="center"
+        android:bottom="20px"
+        android:top="20px"
+        android:right="20px"
+        android:left="20px">
+        <shape android:shape="oval">
+            <size
+                android:width="20px"
+                android:height="20px" />
+            <solid android:color="#ffffffff" />
+        </shape>
+    </item>
+    <!-- 透明阴影 -->
+    <item android:gravity="center">
+        <shape android:shape="oval">
+            <size
+                android:height="30px"
+                android:width="30px" />
+            <solid android:color="#96ffffff" />
+        </shape>
+    </item>
+</layer-list>
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true" android:drawable="@drawable/switch_side_pressed" />
+    <item android:state_focused="true" android:drawable="@drawable/switch_side_pressed" />
+    <item android:state_pressed="true" android:drawable="@drawable/switch_side_pressed" />
+    <item android:drawable="@drawable/switch_side" />
+</selector>
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true" android:drawable="@drawable/take_picture_pressed" />
+    <item android:state_focused="true" android:drawable="@drawable/take_picture_pressed" />
+    <item android:state_pressed="true" android:drawable="@drawable/take_picture_pressed" />
+    <item android:drawable="@drawable/take_picture" />
+</selector>
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_pressed="true" android:drawable="@drawable/btn_settings_pressed"/>
+    <item android:drawable="@drawable/btn_settings_default"/>
+</selector>
+
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="evenOdd"
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+        android:strokeWidth="0"
+        android:strokeColor="#00000000" />
+</vector>
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#bcbcbc"
+        android:fillType="evenOdd"
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+        android:strokeWidth="0"
+        android:strokeColor="#00000000" />
+</vector>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_pressed="true" android:drawable="@drawable/btn_shutter_pressed"/>
+    <item android:drawable="@drawable/btn_shutter_default"/>
+</selector>
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:height="201dp"
+        android:width="201dp"
+        android:viewportWidth="201"
+        android:viewportHeight="201">
+    <path
+            android:fillColor="#ffffff"
+            android:pathData="M 100.5 0 C 156.004617358 0 201 44.995382642 201 100.5 C 201 156.004617358 156.004617358 201 100.5 201 C 44.995382642 201 0 156.004617358 0 100.5 C 0 44.995382642 44.995382642 0 100.5 0 Z"
+            android:strokeWidth="1"
+            android:fillType="evenOdd"/>
+    <path
+            android:fillColor="#dfe7eb"
+            android:pathData="M 100.5 17.2285714 C 146.489540112 17.2285714 183.7714286 54.5104598876 183.7714286 100.5 C 183.7714286 146.489540112 146.489540112 183.7714286 100.5 183.7714286 C 54.5104598876 183.7714286 17.2285714 146.489540112 17.2285714 100.5 C 17.2285714 54.5104598876 54.5104598876 17.2285714 100.5 17.2285714 Z"
+            android:strokeWidth="1"
+            android:fillType="evenOdd"/>
+</vector>
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:height="201dp"
+        android:width="201dp"
+        android:viewportWidth="201"
+        android:viewportHeight="201">
+    <path
+            android:fillColor="#ffffff"
+            android:pathData="M 100.5 0 C 156.004617358 0 201 44.995382642 201 100.5 C 201 156.004617358 156.004617358 201 100.5 201 C 44.995382642 201 0 156.004617358 0 100.5 C 0 44.995382642 44.995382642 0 100.5 0 Z"
+            android:strokeWidth="1"
+            android:fillType="evenOdd"/>
+    <path
+            android:fillColor="#cfd7db"
+            android:pathData="M 100.5 17.2285714 C 146.489540112 17.2285714 183.7714286 54.5104598876 183.7714286 100.5 C 183.7714286 146.489540112 146.489540112 183.7714286 100.5 183.7714286 C 54.5104598876 183.7714286 17.2285714 146.489540112 17.2285714 100.5 C 17.2285714 54.5104598876 54.5104598876 17.2285714 100.5 17.2285714 Z"
+            android:strokeWidth="1"
+            android:fillType="evenOdd"/>
+</vector>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_pressed="true" android:drawable="@drawable/btn_switch_pressed"/>
+    <item android:drawable="@drawable/btn_switch_default"/>
+</selector>
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#008577"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <include
+        layout="@layout/ocr_camera_page"
+        android:id="@+id/camera_page"></include>
+
+    <include
+        layout="@layout/ocr_result_page"
+        android:id="@+id/result_page"
+        android:visibility="gone"></include>
+</FrameLayout>
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <include
+        layout="@layout/ocr_camera_page"
+        android:id="@+id/camera_page"></include>
+
+    <include
+        layout="@layout/ocr_result_page"
+        android:id="@+id/result_page"
+        android:visibility="gone"></include>
+</FrameLayout>
@@ -0,0 +1,160 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:keepScreenOn="true"
+    tools:context=".ocr.OcrMainActivity">
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/colorWindow">
+
+        <com.baidu.paddle.fastdeploy.app.ui.layout.ActionBarLayout
+            android:id="@+id/action_bar_main"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <ImageView
+                android:id="@+id/back_in_preview"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:cropToPadding="true"
+                android:paddingLeft="40px"
+                android:paddingTop="60px"
+                android:paddingRight="60px"
+                android:paddingBottom="40px"
+                android:src="@drawable/back_btn" />
+
+            <LinearLayout
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerHorizontal="true"
+                android:layout_marginTop="50px"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/action_takepicture_btn"
+                    style="@style/action_btn_selected"
+                    android:layout_width="300px"
+                    android:layout_height="wrap_content"
+                    android:text="@string/action_bar_take_photo"
+                    android:textAlignment="center"
+                    android:visibility="gone"/>
+
+                <TextView
+                    android:id="@+id/action_realtime_btn"
+                    style="@style/action_btn"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/action_bar_realtime"
+                    android:textAlignment="center" />
+            </LinearLayout>
+        </com.baidu.paddle.fastdeploy.app.ui.layout.ActionBarLayout>
+
+        <com.baidu.paddle.fastdeploy.app.ui.view.CameraSurfaceView
+            android:id="@+id/sv_preview"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_above="@+id/contral"
+            android:layout_below="@+id/action_bar_main"
+            android:layout_centerInParent="true" />
+
+        <ImageView
+            android:id="@+id/iv_select"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:layout_alignParentRight="true"
+            android:layout_alignParentBottom="true"
+            android:layout_marginRight="20dp"
+            android:layout_marginBottom="145dp"
+            android:background="@drawable/album_btn"
+            android:scaleType="fitXY" />
+
+        <TextView
+            android:id="@+id/tv_status"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentRight="true"
+            android:layout_marginTop="60dp"
+            android:layout_marginRight="30dp"
+            android:textColor="@color/colorText"
+            android:textSize="@dimen/small_font_size" />
+
+        <RelativeLayout
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/top_bar_height"
+            android:layout_alignParentTop="true"
+            android:background="@color/colorTopBar">
+
+            <ImageButton
+                android:id="@+id/btn_settings"
+                android:layout_width="30dp"
+                android:layout_height="30dp"
+                android:layout_alignParentRight="true"
+                android:layout_centerVertical="true"
+                android:layout_marginRight="10dp"
+                android:background="@null"
+                android:scaleType="fitXY"
+                android:src="@drawable/btn_settings" />
+
+        </RelativeLayout>
+
+        <LinearLayout
+            android:id="@+id/contral"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_alignParentBottom="true"
+            android:background="@color/colorBottomBar"
+            android:orientation="vertical">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/bottom_bar_top_margin"
+                android:orientation="vertical"></LinearLayout>
+
+            <RelativeLayout
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/large_button_height">
+
+                <ImageButton
+                    android:id="@+id/btn_switch"
+                    android:layout_width="60dp"
+                    android:layout_height="60dp"
+                    android:layout_alignParentLeft="true"
+                    android:layout_centerVertical="true"
+                    android:layout_marginLeft="60dp"
+                    android:background="#00000000"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/switch_side_btn" />
+
+                <ImageButton
+                    android:id="@+id/btn_shutter"
+                    android:layout_width="@dimen/large_button_width"
+                    android:layout_height="@dimen/large_button_height"
+                    android:layout_centerInParent="true"
+                    android:background="@null"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/take_picture_btn" />
+
+                <ImageView
+                    android:id="@+id/realtime_toggle_btn"
+                    android:layout_width="60dp"
+                    android:layout_height="60dp"
+                    android:layout_alignParentRight="true"
+                    android:layout_centerVertical="true"
+                    android:layout_marginRight="60dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/realtime_stop_btn" />
+
+            </RelativeLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/bottom_bar_bottom_margin"
+                android:orientation="vertical"></LinearLayout>
+        </LinearLayout>
+    </RelativeLayout>
+</android.support.constraint.ConstraintLayout>
@@ -0,0 +1,160 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="#FFFFFF"
+        android:orientation="vertical">
+
+        <com.baidu.paddle.fastdeploy.app.ui.layout.ActionBarLayout
+            android:id="@+id/action_bar_result"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <ImageView
+                android:id="@+id/back_in_result"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:cropToPadding="true"
+                android:paddingLeft="40px"
+                android:paddingTop="60px"
+                android:paddingRight="60px"
+                android:paddingBottom="40px"
+                android:src="@drawable/back_btn" />
+
+            <TextView
+                android:id="@+id/model_name"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerHorizontal="true"
+                android:layout_marginTop="50px"
+                android:textColor="@color/textColor"
+                android:textSize="@dimen/action_btn_text_size" />
+        </com.baidu.paddle.fastdeploy.app.ui.layout.ActionBarLayout>
+
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="700px">
+
+            <ImageView
+                android:id="@+id/result_image"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="@color/bk_result_image_padding" />
+
+        </FrameLayout>
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="40px"
+            android:layout_marginTop="26px"
+            android:layout_marginBottom="20px"
+            android:text="@string/result_label"
+            android:textColor="@color/bk_black"
+            android:textSize="56px"
+            android:visibility="visible" />
+
+        <LinearLayout
+            android:id="@+id/result_seekbar_section"
+            android:layout_width="match_parent"
+            android:layout_height="130px"
+            android:layout_marginLeft="@dimen/result_list_padding_lr"
+            android:layout_marginRight="@dimen/result_list_padding_lr"
+            android:layout_marginBottom="@dimen/result_list_gap_width"
+            android:background="@drawable/result_page_border_section_bk"
+            android:visibility="visible">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_weight="2"
+                android:paddingLeft="30px"
+                android:text="@string/result_table_header_confidence"
+                android:textColor="@color/table_result_tableheader_text_color"
+                android:textSize="@dimen/result_list_view_text_size" />
+
+            <SeekBar
+                android:id="@+id/confidence_seekbar"
+                android:layout_width="220dp"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_weight="6"
+                android:focusable="false"
+                android:maxHeight="8px"
+                android:progressDrawable="@drawable/seekbar_progress_result"
+                android:splitTrack="false"
+                android:thumb="@drawable/seekbar_handle" />
+
+            <TextView
+                android:id="@+id/seekbar_text"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_weight="1"
+                android:paddingRight="30px"
+                android:textSize="@dimen/result_list_view_text_size"
+
+                />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="@dimen/result_list_padding_lr"
+            android:layout_marginRight="@dimen/result_list_padding_lr"
+            android:layout_marginBottom="@dimen/result_list_gap_width"
+            android:background="@drawable/result_page_border_section_bk"
+            android:visibility="visible">
+
+            <TextView
+                style="@style/list_result_view_tablehead_style"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/result_table_header_index"
+                android:textColor="@color/table_result_tableheader_text_color" />
+
+            <TextView
+                style="@style/list_result_view_tablehead_style"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/result_table_header_name"
+                android:textColor="@color/table_result_tableheader_text_color" />
+
+            <TextView
+                style="@style/list_result_view_tablehead_style"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_weight="0.4"
+                android:gravity="right"
+                android:text="@string/result_table_header_confidence"
+                android:textColor="@color/table_result_tableheader_text_color" />
+        </LinearLayout>
+
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <ScrollView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="15px"
+                android:paddingLeft="@dimen/result_list_padding_lr"
+                android:paddingRight="@dimen/result_list_padding_lr">
+
+                <com.baidu.paddle.fastdeploy.app.ui.view.ResultListView
+                    android:id="@+id/result_list_view"
+                    android:layout_width="match_parent"
+                    android:layout_height="700px"
+                    android:divider="#FFFFFF"
+                    android:dividerHeight="@dimen/result_list_gap_width"></com.baidu.paddle.fastdeploy.app.ui.view.ResultListView>
+            </ScrollView>
+
+        </FrameLayout>
+    </LinearLayout>
+</FrameLayout>
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="horizontal"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="@drawable/result_page_border_section_bk">
+
+    <TextView
+        android:id="@+id/index"
+        style="@style/list_result_view_item_style"
+        android:layout_width="wrap_content"
+        android:layout_weight="0.2" />
+
+    <TextView
+        android:id="@+id/name"
+        style="@style/list_result_view_item_style"
+        android:layout_width="wrap_content"
+        android:layout_weight="0.6"
+        android:maxWidth="300px" />
+
+    <TextView
+        android:id="@+id/confidence"
+        style="@style/list_result_view_item_style"
+        android:layout_weight="0.2"
+        android:layout_width="wrap_content" />
+</LinearLayout>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="cpu_thread_num_entries">
+        <item>1 threads</item>
+        <item>2 threads</item>
+        <item>4 threads</item>
+        <item>8 threads</item>
+    </string-array>
+    <string-array name="cpu_thread_num_values">
+        <item>1</item>
+        <item>2</item>
+        <item>4</item>
+        <item>8</item>
+    </string-array>
+    <string-array name="cpu_power_mode_entries">
+        <item>HIGH(only big cores)</item>
+        <item>LOW(only LITTLE cores)</item>
+        <item>FULL(all cores)</item>
+        <item>NO_BIND(depends on system)</item>
+        <item>RAND_HIGH</item>
+        <item>RAND_LOW</item>
+    </string-array>
+    <string-array name="cpu_power_mode_values">
+        <item>LITE_POWER_HIGH</item>
+        <item>LITE_POWER_LOW</item>
+        <item>LITE_POWER_FULL</item>
+        <item>LITE_POWER_NO_BIND</item>
+        <item>LITE_POWER_RAND_HIGH</item>
+        <item>LITE_POWER_RAND_LOW</item>
+    </string-array>
+    <string-array name="enable_lite_fp16_mode_entries">
+        <item>true</item>
+        <item>false</item>
+    </string-array>
+    <string-array name="enable_lite_fp16_mode_values">
+        <item>true</item>
+        <item>false</item>
+    </string-array>
+</resources>
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#008577</color>
+    <color name="colorPrimaryDark">#00574B</color>
+    <color name="colorAccent">#D81B60</color>
+    <color name="colorWindow">#FF000000</color>
+    <color name="colorTopBar">#00000000</color>
+    <color name="colorBottomBar">#00000000</color>
+    <color name="colorText">#FFFFFFFF</color>
+
+    <color name="bk_black">#000000</color>
+    <color name="bk_blue">#3B85F5</color>
+    <color name="textColorHighlight">#F5A623</color>
+    <color name="textColor">#FFFFFF</color>
+
+    <color name="bk_result_image_padding">#EEEEEE</color>
+
+    <color name="table_result_item_text_color">#3B85F5</color>
+    <color name="table_result_tableheader_text_color">#333333</color>
+    <color name="result_section_border_color">#E5E5E5</color>
+    <color name="result_popview_tablebody_bk">#3b85f5</color>
+</resources>
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="bottom_bar_top_margin">26dp</dimen>
+    <dimen name="bottom_bar_bottom_margin">36dp</dimen>
+    <dimen name="bottom_bar_left_right_margin">34dp</dimen>
+    <dimen name="top_bar_height">60dp</dimen>
+    <dimen name="top_bar_left_right_margin">16dp</dimen>
+    <dimen name="large_button_width">67dp</dimen>
+    <dimen name="large_button_height">67dp</dimen>
+    <dimen name="medium_button_width">56dp</dimen>
+    <dimen name="medium_button_height">56dp</dimen>
+    <dimen name="small_button_width">46dp</dimen>
+    <dimen name="small_button_height">46dp</dimen>
+    <dimen name="large_font_size">32dp</dimen>
+    <dimen name="medium_font_size">24dp</dimen>
+    <dimen name="small_font_size">16dp</dimen>
+</resources>
@@ -0,0 +1,51 @@
+<resources>
+    <!-- Default App name -->
+    <string name="app_name">EasyEdge</string>
+    <!-- Other App name -->
+    <string name="detection_app_name">EasyEdge</string>
+    <string name="ocr_app_name">EasyEdge</string>
+    <string name="classification_app_name">EasyEdge</string>
+    <string name="facedet_app_name">EasyEdge</string>
+    <string name="segmentation_app_name">EasyEdge</string>
+    <!-- Keys for PreferenceScreen -->
+    <string name="CHOOSE_PRE_INSTALLED_MODEL_KEY">CHOOSE_INSTALLED_MODEL_KEY</string>
+    <string name="MODEL_DIR_KEY">MODEL_DIR_KEY</string>
+    <string name="LABEL_PATH_KEY">LABEL_PATH_KEY</string>
+    <string name="CPU_THREAD_NUM_KEY">CPU_THREAD_NUM_KEY</string>
+    <string name="CPU_POWER_MODE_KEY">CPU_POWER_MODE_KEY</string>
+    <string name="SCORE_THRESHOLD_KEY">SCORE_THRESHOLD_KEY</string>
+    <string name="ENABLE_LITE_FP16_MODE_KEY">ENABLE_LITE_FP16_MODE_KEY</string>
+    <!-- Common default values ... -->
+    <string name="CPU_THREAD_NUM_DEFAULT">2</string>
+    <string name="CPU_POWER_MODE_DEFAULT">LITE_POWER_HIGH</string>
+    <string name="SCORE_THRESHOLD_DEFAULT">0.4</string>
+    <string name="SCORE_THRESHOLD_CLASSIFICATION">0.1</string>
+    <string name="SCORE_THRESHOLD_FACEDET">0.25</string>
+    <string name="ENABLE_LITE_FP16_MODE_DEFAULT">true</string>
+    <!--Other values-->
+    <!-- Detection model & Label paths & other values ... -->
+    <string name="DETECTION_MODEL_DIR_DEFAULT">models/picodet_s_320_coco_lcnet</string>
+    <string name="DETECTION_LABEL_PATH_DEFAULT">labels/coco_label_list.txt</string>
+    <!-- PP-OCRv2 & PP-OCRv3 values ... -->
+    <string name="OCR_MODEL_DIR_DEFAULT">models</string>
+    <string name="OCR_REC_LABEL_DEFAULT">labels/ppocr_keys_v1.txt</string>
+    <!-- classification values ... -->
+    <string name="CLASSIFICATION_MODEL_DIR_DEFAULT">models/MobileNetV1_x0_25_infer</string>
+    <string name="CLASSIFICATION_LABEL_PATH_DEFAULT">labels/imagenet1k_label_list.txt</string>
+    <!-- facedet values ... -->
+    <string name="FACEDET_MODEL_DIR_DEFAULT">models/scrfd_500m_bnkps_shape320x320_pd</string>
+    <!-- segmentation values ... -->
+    <string name="SEGMENTATION_MODEL_DIR_DEFAULT">models/human_pp_humansegv1_lite_192x192_inference_model</string>
+    <!-- Other resources values-->
+    <string name="action_bar_take_photo">拍照识别</string>
+    <string name="action_bar_realtime">实时识别</string>
+    <string name="action_bar_back">&lt;</string>
+    <string name="action_bar_model_name">模型名称</string>
+    <string name="result_label">识别结果</string>
+    <string name="result_table_header_index">序号</string>
+    <string name="result_table_header_name">名称</string>
+    <string name="result_table_header_confidence">置信度</string>
+    <string name="operation_confidence_control">阈值控制</string>
+    <string name="operation_retry">重新识别</string>
+    <string name="operation_save">保存结果</string>
+</resources>
@@ -0,0 +1,70 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+        <item name="actionOverflowMenuStyle">@style/OverflowMenuStyle</item>
+    </style>
+
+    <style name="OverflowMenuStyle" parent="Widget.AppCompat.Light.PopupMenu.Overflow">
+        <item name="overlapAnchor">false</item>
+    </style>
+
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar"/>
+
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light"/>
+
+    <style name="list_result_view_item_style">
+        <item name="android:textColor">@color/table_result_item_text_color</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:layout_weight">1</item>
+        <item name="android:gravity">left</item>
+        <item name="android:padding">30px</item>
+    </style>
+
+    <style name="list_result_popview_item_style">
+        <item name="android:textColor">@color/textColor</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:gravity">left</item>
+        <item name="android:padding">15px</item>
+        <item name="android:background">@color/result_popview_tablebody_bk</item>
+        <item name="android:layout_width">wrap_content</item>
+        <item name="android:alpha">0.5</item>
+    </style>
+
+    <style name="list_result_view_tablehead_style">
+        <item name="android:textColor">@color/table_result_item_text_color</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:layout_weight">1</item>
+        <item name="android:gravity">left</item>
+        <item name="android:padding">15px</item>
+    </style>
+
+    <style name="list_result_popview_tablehead_style">
+        <item name="android:textColor">@color/textColor</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:layout_weight">1</item>
+        <item name="android:gravity">left</item>
+        <item name="android:padding">20px</item>
+    </style>
+
+    <style name="action_btn">
+        <item name="android:textColor">@color/textColor</item>
+        <item name="android:background">@color/bk_black</item>
+    </style>
+
+    <style name="action_btn_selected">
+        <item name="android:textColor">@color/textColorHighlight</item>
+        <item name="android:background">@color/bk_black</item>
+    </style>
+
+
+</resources>
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="action_btn_size">120dp</dimen>
+    <dimen name="action_btn_text_size">46px</dimen>
+
+    <dimen name="operation_btn_margin_top_take_picture">126px</dimen>
+    <dimen name="operation_btn_margin_top">136px</dimen>
+
+    <dimen name="result_list_view_text_size">46px</dimen>
+
+    <dimen name="result_list_popview_text_size">36px</dimen>
+
+    <dimen name="result_list_padding_lr">15dp</dimen>
+
+    <dimen name="result_list_gap_width">15dp</dimen>
+
+</resources>
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+    <ListPreference
+        android:defaultValue="@string/OCR_MODEL_DIR_DEFAULT"
+        android:key="@string/CHOOSE_PRE_INSTALLED_MODEL_KEY"
+        android:negativeButtonText="@null"
+        android:positiveButtonText="@null"
+        android:title="Choose Pre-Installed Models" />
+    <EditTextPreference
+        android:defaultValue="@string/OCR_MODEL_DIR_DEFAULT"
+        android:key="@string/MODEL_DIR_KEY"
+        android:title="Model Dir" />
+    <EditTextPreference
+        android:defaultValue="@string/OCR_REC_LABEL_DEFAULT"
+        android:key="@string/LABEL_PATH_KEY"
+        android:title="Label Path" />
+    <ListPreference
+        android:defaultValue="@string/CPU_THREAD_NUM_DEFAULT"
+        android:entries="@array/cpu_thread_num_entries"
+        android:entryValues="@array/cpu_thread_num_values"
+        android:key="@string/CPU_THREAD_NUM_KEY"
+        android:negativeButtonText="@null"
+        android:positiveButtonText="@null"
+        android:title="CPU Thread Num" />
+    <ListPreference
+        android:defaultValue="@string/CPU_POWER_MODE_DEFAULT"
+        android:entries="@array/cpu_power_mode_entries"
+        android:entryValues="@array/cpu_power_mode_values"
+        android:key="@string/CPU_POWER_MODE_KEY"
+        android:negativeButtonText="@null"
+        android:positiveButtonText="@null"
+        android:title="CPU Power Mode" />
+    <EditTextPreference
+        android:key="@string/SCORE_THRESHOLD_KEY"
+        android:defaultValue="@string/SCORE_THRESHOLD_DEFAULT"
+        android:title="Score Threshold: (0.0, 1.0)" />
+    <ListPreference
+        android:defaultValue="@string/ENABLE_LITE_FP16_MODE_DEFAULT"
+        android:entries="@array/enable_lite_fp16_mode_entries"
+        android:entryValues="@array/enable_lite_fp16_mode_values"
+        android:key="@string/ENABLE_LITE_FP16_MODE_KEY"
+        android:negativeButtonText="@null"
+        android:positiveButtonText="@null"
+        android:title="Enable Lite FP16" />
+</PreferenceScreen>