[Android] Add classification app examples (#590)

* 1.Classification Code submission;
2.Specification code format.

* Specification code format.

* Update strings.xml

Co-authored-by: DefTruth <31974251+DefTruth@users.noreply.github.com>

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/examples/classification/ClassificationMainActivity.java

@@ -0,0 +1,387 @@
+package com.baidu.paddle.fastdeploy.app.examples.classification;
+
+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.vision.ClassifyResult;
+import com.baidu.paddle.fastdeploy.vision.classification.PaddleClasModel;
+
+import java.io.File;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ClassificationMainActivity extends Activity implements View.OnClickListener, CameraSurfaceView.OnTextureChangedListener {
+    private static final String TAG = ClassificationMainActivity.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 detectResultView;
+    private Bitmap shutterBitmap;
+    private Bitmap originShutterBitmap;
+    private Bitmap picBitmap;
+    private Bitmap originPicBitmap;
+
+    public static final int TYPE_UNKNOWN = -1;
+    public static final int BTN_SHUTTER = 0;
+    public static final int ALBUM_SELECT = 1;
+    private static int TYPE = TYPE_UNKNOWN;
+
+    private static final int REQUEST_PERMISSION_CODE_STORAGE = 101;
+    private static final int INTENT_CODE_PICK_IMAGE = 100;
+
+    String savedImagePath = "result.jpg";
+    int lastFrameIndex = 0;
+    long lastFrameTime;
+
+    // Call 'init' and 'release' manually later
+    PaddleClasModel predictor = new PaddleClasModel();
+
+    @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.classification_activity_main);
+
+        // Clear all setting items to avoid app crashing due to the incorrect settings
+        initSettings();
+
+        // Init the camera preview and UI components
+        initView();
+
+        // Check and request CAMERA and WRITE_EXTERNAL_STORAGE permissions
+        if (!checkAllPermissions()) {
+            requestAllPermissions();
+        }
+    }
+
+    @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;
+                svPreview.onPause();
+                cameraPageView.setVisibility(View.GONE);
+                resultPageView.setVisibility(View.VISIBLE);
+                seekbarText.setText(resultNum + "");
+                confidenceSeekbar.setProgress((int) (resultNum * 100));
+                resultImage.setImageBitmap(shutterBitmap);
+                break;
+            case R.id.btn_settings:
+                startActivity(new Intent(ClassificationMainActivity.this, ClassificationSettingsActivity.class));
+                break;
+            case R.id.realtime_toggle_btn:
+                toggleRealtimeStyle();
+                break;
+            case R.id.back_in_preview:
+                finish();
+                break;
+            case R.id.albumSelect:
+                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);
+                }
+                break;
+            case R.id.back_in_result:
+                resultPageView.setVisibility(View.GONE);
+                cameraPageView.setVisibility(View.VISIBLE);
+                svPreview.onResume();
+                break;
+
+        }
+    }
+
+    @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);
+            svPreview.setOnTextureChangedListener(new CameraSurfaceView.OnTextureChangedListener() {
+                @Override
+                public boolean onTextureChanged(Bitmap ARGB8888ImageBitmap) {
+                    return false;
+                }
+            });
+        }
+    }
+
+    @Override
+    public boolean onTextureChanged(Bitmap ARGB8888ImageBitmap) {
+        String savedImagePath = "";
+        synchronized (this) {
+            savedImagePath = Utils.getDCIMDirectory() + File.separator + "result.jpg";
+        }
+        if (TYPE == BTN_SHUTTER) {
+            shutterBitmap = ARGB8888ImageBitmap.copy(Bitmap.Config.ARGB_8888, true);
+            originShutterBitmap = ARGB8888ImageBitmap.copy(Bitmap.Config.ARGB_8888, true);
+        } else {
+            // Only reference in predict loops.
+            shutterBitmap = ARGB8888ImageBitmap;
+            originShutterBitmap = ARGB8888ImageBitmap;
+        }
+        boolean modified = false;
+        ClassifyResult result = predictor.predict(
+                ARGB8888ImageBitmap, true, ClassificationSettingsActivity.scoreThreshold);
+        modified = result.initialized();
+        if (!savedImagePath.isEmpty()) {
+            synchronized (this) {
+                ClassificationMainActivity.this.savedImagePath = "result.jpg";
+            }
+        }
+        lastFrameIndex++;
+        if (lastFrameIndex >= 30) {
+            final int fps = (int) (lastFrameIndex * 1e9 / (System.nanoTime() - lastFrameTime));
+            runOnUiThread(new Runnable() {
+                @SuppressLint("SetTextI18n")
+                public void run() {
+                    tvStatus.setText(Integer.toString(fps) + "fps");
+                }
+            });
+            lastFrameIndex = 0;
+            lastFrameTime = System.nanoTime();
+        }
+        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();
+        }
+        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 = BTN_SHUTTER;
+        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.albumSelect);
+        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);
+        detectResultView = findViewById(R.id.result_list_view);
+
+        List<BaseResultModel> results = new ArrayList<>();
+        results.add(new BaseResultModel(1, "cup", 0.4f));
+        results.add(new BaseResultModel(2, "pen", 0.6f));
+        results.add(new BaseResultModel(3, "tang", 1.0f));
+        final BaseResultAdapter adapter = new BaseResultAdapter(this, R.layout.classification_result_page_item, results);
+        detectResultView.setAdapter(adapter);
+        detectResultView.invalidate();
+
+        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));
+            }
+
+            @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(500);
+                            predictor.predict(picBitmap, savedImagePath, resultNum);
+                            resultImage.setImageBitmap(picBitmap);
+                            picBitmap = originPicBitmap.copy(Bitmap.Config.ARGB_8888, true);
+                            resultNum = 1.0f;
+                        } else {
+                            SystemClock.sleep(500);
+                            predictor.predict(shutterBitmap, savedImagePath, resultNum);
+                            resultImage.setImageBitmap(shutterBitmap);
+                            shutterBitmap = originShutterBitmap.copy(Bitmap.Config.ARGB_8888, true);
+                            resultNum = 1.0f;
+                        }
+                    }
+                });
+            }
+        });
+    }
+
+    @SuppressLint("ApplySharedPref")
+    public void initSettings() {
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        SharedPreferences.Editor editor = sharedPreferences.edit();
+        editor.clear();
+        editor.commit();
+        ClassificationSettingsActivity.resetSettings();
+    }
+
+    public void checkAndUpdateSettings() {
+        if (ClassificationSettingsActivity.checkAndUpdateSettings(this)) {
+            String realModelDir = getCacheDir() + "/" + ClassificationSettingsActivity.modelDir;
+            Utils.copyDirectoryFromAssets(this, ClassificationSettingsActivity.modelDir, realModelDir);
+            String realLabelPath = getCacheDir() + "/" + ClassificationSettingsActivity.labelPath;
+            Utils.copyFileFromAssets(this, ClassificationSettingsActivity.labelPath, realLabelPath);
+
+            String modelFile = realModelDir + "/" + "inference.pdmodel";
+            String paramsFile = realModelDir + "/" + "inference.pdiparams";
+            String configFile = realModelDir + "/" + "inference_cls.yaml";
+            String labelFile = realLabelPath;
+            RuntimeOption option = new RuntimeOption();
+            option.setCpuThreadNum(ClassificationSettingsActivity.cpuThreadNum);
+            option.setLitePowerMode(ClassificationSettingsActivity.cpuPowerMode);
+            if (Boolean.parseBoolean(ClassificationSettingsActivity.enableLiteFp16)) {
+                option.enableLiteFp16();
+            }
+            predictor.init(modelFile, paramsFile, configFile, labelFile, option);
+        }
+    }
+
+    @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(ClassificationMainActivity.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) {
+                            ClassificationMainActivity.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;
+    }
+}

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/examples/classification/ClassificationSettingsActivity.java

@@ -0,0 +1,198 @@
+package com.baidu.paddle.fastdeploy.app.examples.classification;
+
+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 ClassificationSettingsActivity extends AppCompatPreferenceActivity implements
+        SharedPreferences.OnSharedPreferenceChangeListener {
+    private static final String TAG = ClassificationSettingsActivity.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 = 0.1f;
+    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.classification_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.CLASSIFICATION_MODEL_DIR_DEFAULT));
+        preInstalledLabelPaths.add(getString(R.string.CLASSIFICATION_LABEL_PATH_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_CLASSIFICATION));
+        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.CLASSIFICATION_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.CLASSIFICATION_MODEL_DIR_DEFAULT));
+        String label_path = sharedPreferences.getString(getString(R.string.LABEL_PATH_KEY),
+                getString(R.string.CLASSIFICATION_LABEL_PATH_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_CLASSIFICATION));
+        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.CLASSIFICATION_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.CLASSIFICATION_LABEL_PATH_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_CLASSIFICATION));
+        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 = 0.1f;
+        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();
+    }
+}

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/examples/detection/DetectionMainActivity.java

@@ -1,5 +1,8 @@
 package com.baidu.paddle.fastdeploy.app.examples.detection;
 
+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;
@@ -34,7 +37,7 @@ 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.DetectResultAdapter;
+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.vision.DetectionResult;
 import com.baidu.paddle.fastdeploy.vision.detection.PicoDet;
@@ -56,8 +59,8 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
     boolean isRealtimeStatusRunning = false;
     ImageView backInPreview;
     private ImageView albumSelectButton;
-    private View mCameraPageView;
+    private View cameraPageView;
-    private ViewGroup mResultPageView;
+    private ViewGroup resultPageView;
     private ImageView resultImage;
     private ImageView backInResult;
     private SeekBar confidenceSeekbar;
@@ -68,6 +71,7 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
     private Bitmap originShutterBitmap;
     private Bitmap picBitmap;
     private Bitmap originPicBitmap;
+
     public static final int TYPE_UNKNOWN = -1;
     public static final int BTN_SHUTTER = 0;
     public static final int ALBUM_SELECT = 1;
@@ -115,8 +119,8 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
             case R.id.btn_shutter:
                 TYPE = BTN_SHUTTER;
                 svPreview.onPause();
-                mCameraPageView.setVisibility(View.GONE);
+                cameraPageView.setVisibility(View.GONE);
-                mResultPageView.setVisibility(View.VISIBLE);
+                resultPageView.setVisibility(View.VISIBLE);
                 seekbarText.setText(resultNum + "");
                 confidenceSeekbar.setProgress((int) (resultNum * 100));
                 resultImage.setImageBitmap(shutterBitmap);
@@ -132,9 +136,9 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
                 break;
             case R.id.albumSelect:
                 TYPE = ALBUM_SELECT;
-                // 判断是否已经赋予权限
+                // Judge whether authority has been granted.
                 if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
-                    // 如果应用之前请求过此权限但用户拒绝了请求，此方法将返回 true。
+                    // 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);
@@ -143,8 +147,8 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
                 }
                 break;
             case R.id.back_in_result:
-                mResultPageView.setVisibility(View.GONE);
+                resultPageView.setVisibility(View.GONE);
-                mCameraPageView.setVisibility(View.VISIBLE);
+                cameraPageView.setVisibility(View.VISIBLE);
                 svPreview.onResume();
                 break;
 
@@ -156,12 +160,12 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
         super.onActivityResult(requestCode, resultCode, data);
         if (requestCode == INTENT_CODE_PICK_IMAGE) {
             if (resultCode == Activity.RESULT_OK) {
-                mCameraPageView.setVisibility(View.GONE);
+                cameraPageView.setVisibility(View.GONE);
-                mResultPageView.setVisibility(View.VISIBLE);
+                resultPageView.setVisibility(View.VISIBLE);
                 seekbarText.setText(resultNum + "");
                 confidenceSeekbar.setProgress((int) (resultNum * 100));
                 Uri uri = data.getData();
-                String path = getRealPathFromURI(uri);
+                String path = getRealPathFromURI(this, uri);
                 picBitmap = decodeBitmap(path, 720, 1280);
                 originPicBitmap = picBitmap.copy(Bitmap.Config.ARGB_8888, true);
                 resultImage.setImageBitmap(picBitmap);
@@ -169,25 +173,6 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
         }
     }
 
-    private String getRealPathFromURI(Uri contentURI) {
-        String result;
-        Cursor cursor = null;
-        try {
-            cursor = 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;
-    }
-
     private void toggleRealtimeStyle() {
         if (isRealtimeStatusRunning) {
             isRealtimeStatusRunning = false;
@@ -217,7 +202,7 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
             shutterBitmap = ARGB8888ImageBitmap.copy(Bitmap.Config.ARGB_8888, true);
             originShutterBitmap = ARGB8888ImageBitmap.copy(Bitmap.Config.ARGB_8888, true);
         } else {
-            // Only reference in detecting loops.
+            // Only reference in predict loops.
             shutterBitmap = ARGB8888ImageBitmap;
             originShutterBitmap = ARGB8888ImageBitmap;
         }
@@ -226,7 +211,6 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
         DetectionResult result = predictor.predict(
                 ARGB8888ImageBitmap, true, DetectionSettingsActivity.scoreThreshold);
         modified = result.initialized();
-
         if (!savedImagePath.isEmpty()) {
             synchronized (this) {
                 DetectionMainActivity.this.savedImagePath = "result.jpg";
@@ -247,38 +231,6 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
         return modified;
     }
 
-    /**
-     * @param path          路径
-     * @param displayWidth  需要显示的宽度
-     * @param displayHeight 需要显示的高度
-     * @return Bitmap
-     */
-    public static Bitmap decodeBitmap(String path, int displayWidth, int displayHeight) {
-        BitmapFactory.Options op = new BitmapFactory.Options();
-        op.inJustDecodeBounds = true;
-        // op.inJustDecodeBounds = true;表示我们只读取Bitmap的宽高等信息，不读取像素。
-        Bitmap bmp = BitmapFactory.decodeFile(path, op); // 获取尺寸信息
-        // op.outWidth表示的是图像真实的宽度
-        // op.inSamplySize 表示的是缩小的比例
-        // op.inSamplySize = 4,表示缩小1/4的宽和高，1/16的像素，android认为设置为2是最快的。
-        // 获取比例大小
-        int wRatio = (int) Math.ceil(op.outWidth / (float) displayWidth);
-        int hRatio = (int) Math.ceil(op.outHeight / (float) displayHeight);
-        // 如果超出指定大小，则缩小相应的比例
-        if (wRatio > 1 && hRatio > 1) {
-            if (wRatio > hRatio) {
-                // 如果太宽，我们就缩小宽度到需要的大小，注意，高度就会变得更加的小。
-                op.inSampleSize = wRatio;
-            } else {
-                op.inSampleSize = hRatio;
-            }
-        }
-        op.inJustDecodeBounds = false;
-        bmp = BitmapFactory.decodeFile(path, op);
-        // 从原Bitmap创建一个给定宽高的Bitmap
-        return Bitmap.createScaledBitmap(bmp, displayWidth, displayHeight, true);
-    }
-
     @Override
     protected void onResume() {
         super.onResume();
@@ -306,6 +258,7 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
     }
 
     public void initView() {
+        TYPE = BTN_SHUTTER;
         svPreview = (CameraSurfaceView) findViewById(R.id.sv_preview);
         svPreview.setOnTextureChangedListener(this);
         tvStatus = (TextView) findViewById(R.id.tv_status);
@@ -321,8 +274,8 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
         backInPreview.setOnClickListener(this);
         albumSelectButton = findViewById(R.id.albumSelect);
         albumSelectButton.setOnClickListener(this);
-        mCameraPageView = findViewById(R.id.camera_page);
+        cameraPageView = findViewById(R.id.camera_page);
-        mResultPageView = findViewById(R.id.result_page);
+        resultPageView = findViewById(R.id.result_page);
         resultImage = findViewById(R.id.result_image);
         backInResult = findViewById(R.id.back_in_result);
         backInResult.setOnClickListener(this);
@@ -334,7 +287,7 @@ public class DetectionMainActivity extends Activity implements View.OnClickListe
         results.add(new BaseResultModel(1, "cup", 0.4f));
         results.add(new BaseResultModel(2, "pen", 0.6f));
         results.add(new BaseResultModel(3, "tang", 1.0f));
-        final DetectResultAdapter adapter = new DetectResultAdapter(this, R.layout.detection_result_page_item, results);
+        final BaseResultAdapter adapter = new BaseResultAdapter(this, R.layout.detection_result_page_item, results);
         detectResultView.setAdapter(adapter);
         detectResultView.invalidate();
 

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/examples/detection/DetectionSettingsActivity.java

@@ -59,8 +59,8 @@ public class DetectionSettingsActivity extends AppCompatPreferenceActivity imple
         preInstalledCPUPowerModes = new ArrayList<String>();
         preInstalledScoreThresholds = new ArrayList<String>();
         preInstalledEnableLiteFp16s = new ArrayList<String>();
-        preInstalledModelDirs.add(getString(R.string.MODEL_DIR_DEFAULT));
+        preInstalledModelDirs.add(getString(R.string.DETECTION_MODEL_DIR_DEFAULT));
-        preInstalledLabelPaths.add(getString(R.string.LABEL_PATH_DEFAULT));
+        preInstalledLabelPaths.add(getString(R.string.DETECTION_LABEL_PATH_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));
@@ -90,7 +90,7 @@ public class DetectionSettingsActivity extends AppCompatPreferenceActivity imple
         SharedPreferences sharedPreferences = getPreferenceScreen().getSharedPreferences();
 
         String selected_model_dir = sharedPreferences.getString(getString(R.string.CHOOSE_PRE_INSTALLED_MODEL_KEY),
-                getString(R.string.MODEL_DIR_DEFAULT));
+                getString(R.string.DETECTION_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();
@@ -106,9 +106,9 @@ public class DetectionSettingsActivity extends AppCompatPreferenceActivity imple
         }
 
         String model_dir = sharedPreferences.getString(getString(R.string.MODEL_DIR_KEY),
-                getString(R.string.MODEL_DIR_DEFAULT));
+                getString(R.string.DETECTION_MODEL_DIR_DEFAULT));
         String label_path = sharedPreferences.getString(getString(R.string.LABEL_PATH_KEY),
-                getString(R.string.LABEL_PATH_DEFAULT));
+                getString(R.string.DETECTION_LABEL_PATH_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),
@@ -136,12 +136,12 @@ public class DetectionSettingsActivity extends AppCompatPreferenceActivity imple
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(ctx);
 
         String model_dir = sharedPreferences.getString(ctx.getString(R.string.MODEL_DIR_KEY),
-                ctx.getString(R.string.MODEL_DIR_DEFAULT));
+                ctx.getString(R.string.DETECTION_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.LABEL_PATH_DEFAULT));
+                ctx.getString(R.string.DETECTION_LABEL_PATH_DEFAULT));
         settingsChanged |= !labelPath.equalsIgnoreCase(label_path);
         labelPath = label_path;
 

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/ui/Utils.java

@@ -2,9 +2,14 @@ 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;
@@ -241,4 +246,44 @@ public class Utils {
         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;
+    }
 }

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/ui/view/adapter/BaseResultAdapter.java

@@ -15,14 +15,14 @@ import com.baidu.paddle.fastdeploy.app.ui.view.model.BaseResultModel;
 import java.text.DecimalFormat;
 import java.util.List;
 
-public class DetectResultAdapter extends ArrayAdapter<BaseResultModel> {
+public class BaseResultAdapter extends ArrayAdapter<BaseResultModel> {
     private int resourceId;
 
-    public DetectResultAdapter(@NonNull Context context, int resource) {
+    public BaseResultAdapter(@NonNull Context context, int resource) {
         super(context, resource);
     }
 
-    public DetectResultAdapter(@NonNull Context context, int resource, @NonNull List<BaseResultModel> objects) {
+    public BaseResultAdapter(@NonNull Context context, int resource, @NonNull List<BaseResultModel> objects) {
         super(context, resource, objects);
         resourceId = resource;
     }

java/android/app/src/main/res/layout/classification_activity_main.xml

@@ -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/classification_camera_page"
+        android:id="@+id/camera_page"></include>
+
+    <include
+        layout="@layout/classification_result_page"
+        android:id="@+id/result_page"
+        android:visibility="gone"></include>
+</FrameLayout>

java/android/app/src/main/res/layout/classification_camera_page.xml

@@ -0,0 +1,161 @@
+<?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=".detection.DetectionMainActivity">
+
+    <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"
+                    android:textSize="15sp"/>
+            </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/albumSelect"
+            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>

java/android/app/src/main/res/layout/classification_result_page.xml

@@ -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>

java/android/app/src/main/res/layout/classification_result_page_item.xml

@@ -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>

java/android/app/src/main/res/layout/detection_camera_page.xml

@@ -42,18 +42,17 @@
                     android:layout_height="wrap_content"
                     android:text="@string/action_bar_take_photo"
                     android:textAlignment="center"
-                    android:visibility="gone"/>
+                    android:visibility="gone" />
 
                 <TextView
                     android:id="@+id/action_realtime_btn"
                     style="@style/action_btn"
-                    android:layout_width="300px"
+                    android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:text="@string/action_bar_realtime"
                     android:textAlignment="center" />
             </LinearLayout>
 
-        <!--        实时-->
         <com.baidu.paddle.fastdeploy.app.ui.view.CameraSurfaceView
             android:id="@+id/sv_preview"
             android:layout_width="match_parent"

java/android/app/src/main/res/values/strings.xml

@@ -4,6 +4,7 @@
     <!-- Other App name -->
     <string name="detection_app_name">EasyEdge</string>
     <string name="ocr_app_name">EasyEdge</string>
+    <string name="classification_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>
@@ -16,17 +17,21 @@
     <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="ENABLE_LITE_FP16_MODE_DEFAULT">true</string>
     <!--Other values-->
-    <!-- Default model & Label paths & other values ... -->
+    <!-- Detection model & Label paths & other values ... -->
-    <string name="MODEL_DIR_DEFAULT">models/picodet_s_320_coco_lcnet</string>
+    <string name="DETECTION_MODEL_DIR_DEFAULT">models/picodet_s_320_coco_lcnet</string>
-    <string name="LABEL_PATH_DEFAULT">labels/coco_label_list.txt</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>
     <!-- Other resources values-->
     <string name="action_bar_take_photo">拍照识别</string>
-    <string name="action_bar_realtime">EasyEdge 实时识别</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>

java/android/app/src/main/res/xml/classification_settings.xml

@@ -1,4 +1,45 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-
+    <ListPreference
+        android:defaultValue="@string/CLASSIFICATION_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/CLASSIFICATION_MODEL_DIR_DEFAULT"
+        android:key="@string/MODEL_DIR_KEY"
+        android:title="Model Dir" />
+    <EditTextPreference
+        android:defaultValue="@string/CLASSIFICATION_LABEL_PATH_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_CLASSIFICATION"
+        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>

java/android/app/src/main/res/xml/default_settings.xml

@@ -1,45 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    <ListPreference
-        android:defaultValue="@string/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/MODEL_DIR_DEFAULT"
-        android:key="@string/MODEL_DIR_KEY"
-        android:title="Model Dir" />
-    <EditTextPreference
-        android:defaultValue="@string/LABEL_PATH_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>

java/android/app/src/main/res/xml/detection_settings.xml

@@ -1,17 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
     <ListPreference
-        android:defaultValue="@string/MODEL_DIR_DEFAULT"
+        android:defaultValue="@string/DETECTION_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/MODEL_DIR_DEFAULT"
+        android:defaultValue="@string/DETECTION_MODEL_DIR_DEFAULT"
         android:key="@string/MODEL_DIR_KEY"
         android:title="Model Dir" />
     <EditTextPreference
-        android:defaultValue="@string/LABEL_PATH_DEFAULT"
+        android:defaultValue="@string/DETECTION_LABEL_PATH_DEFAULT"
         android:key="@string/LABEL_PATH_KEY"
         android:title="Label Path" />
     <ListPreference