1、新增CaptureFragment

2、将扫码相关逻辑与界面分离，ZXingLite使用更容易扩展。

lib/src/main/AndroidManifest.xml

@@ -5,14 +5,10 @@
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.VIBRATE"/>
     <uses-permission android:name="android.permission.FLASHLIGHT"/>
-    <!-- unavailable in API 23 -->
-    <uses-permission android:name="com.android.browser.permission.READ_HISTORY_BOOKMARKS"/>
+
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 
-
     <application>
-        <activity
-            android:name="com.king.zxing.CaptureActivity"
-            android:screenOrientation="portrait"/>
+
     </application>
 </manifest>

lib/src/main/java/com/king/zxing/BeepManager.java

@@ -32,7 +32,7 @@ import java.io.Closeable;
 import java.io.IOException;
 
 /**
- * Manages beeps and vibrations for {@link CaptureActivity}.
+ * Manages beeps and vibrations for {@link Activity}.
  */
 public final class BeepManager implements MediaPlayer.OnErrorListener, Closeable {
 
@@ -62,7 +62,7 @@ public final class BeepManager implements MediaPlayer.OnErrorListener, Closeable
 
     synchronized void updatePrefs() {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
-        playBeep = shouldBeep(prefs, activity);
+        shouldBeep(prefs, activity);
 //        vibrate = prefs.getBoolean(Preferences.KEY_VIBRATE, false);
         if (playBeep && mediaPlayer == null) {
             // The volume on STREAM_SYSTEM is not adjustable, and users found it too loud,
@@ -83,7 +83,7 @@ public final class BeepManager implements MediaPlayer.OnErrorListener, Closeable
     }
 
     private static boolean shouldBeep(SharedPreferences prefs, Context activity) {
-        boolean shouldPlayBeep = prefs.getBoolean(Preferences.KEY_PLAY_BEEP, true);
+        boolean shouldPlayBeep = prefs.getBoolean(Preferences.KEY_PLAY_BEEP, false);
         if (shouldPlayBeep) {
             // See if sound settings overrides this
             AudioManager audioService = (AudioManager) activity.getSystemService(Context.AUDIO_SERVICE);
@@ -97,7 +97,7 @@ public final class BeepManager implements MediaPlayer.OnErrorListener, Closeable
     @TargetApi(Build.VERSION_CODES.KITKAT)
     private MediaPlayer buildMediaPlayer(Context activity) {
         MediaPlayer mediaPlayer = new MediaPlayer();
-        try (AssetFileDescriptor file = activity.getResources().openRawResourceFd(R.raw.beep)) {
+        try (AssetFileDescriptor file = activity.getResources().openRawResourceFd(R.raw.zxl_beep)) {
             mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(), file.getLength());
             mediaPlayer.setOnErrorListener(this);
             mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

lib/src/main/java/com/king/zxing/CaptureFragment.java

@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2019 Jenly Yu
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.king.zxing;
+
+import android.os.Bundle;
+import android.support.annotation.LayoutRes;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.SurfaceView;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.king.zxing.camera.CameraManager;
+
+/**
+ * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
+ */
+public class CaptureFragment extends Fragment implements OnCaptureCallback {
+
+    public static final String KEY_RESULT = Intents.Scan.RESULT;
+
+    private View mRootView;
+
+    private SurfaceView surfaceView;
+    private ViewfinderView viewfinderView;
+
+    private CaptureHelper mCaptureHelper;
+
+    public static CaptureFragment newInstance() {
+
+        Bundle args = new Bundle();
+        
+        CaptureFragment fragment = new CaptureFragment();
+        fragment.setArguments(args);
+        return fragment;
+    }
+
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        int layoutId = getLayoutId();
+        if(isContentView(layoutId)){
+            mRootView = inflater.inflate(getLayoutId(),container,false);
+        }
+        initUI();
+        return mRootView;
+    }
+
+    /**
+     * 初始化
+     */
+    public void initUI(){
+        surfaceView = mRootView.findViewById(getSurfaceViewId());
+        viewfinderView = mRootView.findViewById(getViewfinderViewId());
+        mCaptureHelper = new CaptureHelper(this,surfaceView,viewfinderView);
+        mCaptureHelper.setOnCaptureCallback(this);
+    }
+
+    /**
+     * 返回true时会自动初始化{@link #mRootView}，返回为false时需自己去通过{@link #setRootView(View)}初始化{@link #mRootView}
+     * @param layoutId
+     * @return 默认返回true
+     */
+    public boolean isContentView(@LayoutRes int layoutId){
+        return true;
+    }
+
+    /**
+     * 布局id
+     * @return
+     */
+    public int getLayoutId(){
+        return R.layout.zxl_capture;
+    }
+
+    /**
+     * {@link ViewfinderView} 的 id
+     * @return
+     */
+    public int getViewfinderViewId(){
+        return R.id.viewfinderView;
+    }
+
+
+    /**
+     * 预览界面{@link #surfaceView} 的id
+     * @return
+     */
+    public int getSurfaceViewId(){
+        return R.id.surfaceView;
+    }
+
+    /**
+     * Get {@link CaptureHelper}
+     * @return {@link #mCaptureHelper}
+     */
+    public CaptureHelper getCaptureHelper(){
+        return mCaptureHelper;
+    }
+
+    /**
+     * Get {@link CameraManager}
+     * @return {@link #mCaptureHelper#getCameraManager()}
+     */
+    public CameraManager getCameraManager(){
+        return mCaptureHelper.getCameraManager();
+    }
+
+    //--------------------------------------------
+
+    public View getRootView() {
+        return mRootView;
+    }
+
+    public void setRootView(View rootView) {
+        this.mRootView = rootView;
+    }
+
+
+    //--------------------------------------------
+
+    @Override
+    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
+        super.onActivityCreated(savedInstanceState);
+        mCaptureHelper.onCreate();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        mCaptureHelper.onResume();
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        mCaptureHelper.onPause();
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        mCaptureHelper.onDestroy();
+    }
+
+    /**
+     * 接收扫码结果回调
+     * @param result 扫码结果
+     * @return 返回true表示拦截，将不自动执行后续逻辑，为false表示不拦截，默认不拦截
+     */
+    @Override
+    public boolean onResultCallback(String result) {
+        return false;
+    }
+
+}

lib/src/main/java/com/king/zxing/CaptureHandler.java

@@ -1,169 +1,154 @@
-package com.king.zxing;
-
-/*
- * Copyright (C) 2008 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-import android.content.ActivityNotFoundException;
-import android.content.pm.PackageManager;
-import android.content.pm.ResolveInfo;
-import android.graphics.BitmapFactory;
-import android.provider.Browser;
-import com.google.zxing.BarcodeFormat;
-import com.google.zxing.DecodeHintType;
-import com.google.zxing.Result;
-import com.king.zxing.camera.CameraManager;
-
-import android.app.Activity;
-import android.content.Intent;
-import android.graphics.Bitmap;
-import android.net.Uri;
-import android.os.Bundle;
-import android.os.Handler;
-import android.os.Message;
-import android.util.Log;
-
-import java.util.Collection;
-import java.util.Map;
-
-/**
- * This class handles all the messaging which comprises the state machine for capture.
- *
- * @author dswitkin@google.com (Daniel Switkin)
- */
-public final class CaptureActivityHandler extends Handler {
-
-    private static final String TAG = CaptureActivityHandler.class.getSimpleName();
-
-    private final CaptureActivity activity;
-    private final DecodeThread decodeThread;
-    private State state;
-    private final CameraManager cameraManager;
-
-    private enum State {
-        PREVIEW,
-        SUCCESS,
-        DONE
-    }
-
-    CaptureActivityHandler(CaptureActivity activity,
-                           Collection<BarcodeFormat> decodeFormats,
-                           Map<DecodeHintType,?> baseHints,
-                           String characterSet,
-                           CameraManager cameraManager) {
-        this.activity = activity;
-        decodeThread = new DecodeThread(activity, decodeFormats, baseHints, characterSet,
-                new ViewfinderResultPointCallback(activity.getViewfinderView()));
-        decodeThread.start();
-        state = State.SUCCESS;
-
-        // Start ourselves capturing previews and decoding.
-        this.cameraManager = cameraManager;
-        cameraManager.startPreview();
-        restartPreviewAndDecode();
-    }
-
-    @Override
-    public void handleMessage(Message message) {
-        if (message.what == R.id.restart_preview) {
-            restartPreviewAndDecode();
-
-        } else if (message.what == R.id.decode_succeeded) {
-            state = State.SUCCESS;
-            Bundle bundle = message.getData();
-            Bitmap barcode = null;
-            float scaleFactor = 1.0f;
-            if (bundle != null) {
-                byte[] compressedBitmap = bundle.getByteArray(DecodeThread.BARCODE_BITMAP);
-                if (compressedBitmap != null) {
-                    barcode = BitmapFactory.decodeByteArray(compressedBitmap, 0, compressedBitmap.length, null);
-                    // Mutable copy:
-                    barcode = barcode.copy(Bitmap.Config.ARGB_8888, true);
-                }
-                scaleFactor = bundle.getFloat(DecodeThread.BARCODE_SCALED_FACTOR);
-            }
-            activity.handleDecode((Result) message.obj, barcode, scaleFactor);
-
-        } else if (message.what == R.id.decode_failed) {// We're decoding as fast as possible, so when one decode fails, start another.
-            state = State.PREVIEW;
-            cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
-
-        } else if (message.what == R.id.return_scan_result) {
-            activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
-            activity.finish();
-
-        } else if (message.what == R.id.launch_product_query) {
-            String url = (String) message.obj;
-
-            Intent intent = new Intent(Intent.ACTION_VIEW);
-            intent.addFlags(Intents.FLAG_NEW_DOC);
-            intent.setData(Uri.parse(url));
-
-            ResolveInfo resolveInfo =
-                    activity.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
-            String browserPackageName = null;
-            if (resolveInfo != null && resolveInfo.activityInfo != null) {
-                browserPackageName = resolveInfo.activityInfo.packageName;
-                Log.d(TAG, "Using browser in package " + browserPackageName);
-            }
-
-            // Needed for default Android browser / Chrome only apparently
-            if (browserPackageName != null) {
-                switch (browserPackageName) {
-                    case "com.android.browser":
-                    case "com.android.chrome":
-                        intent.setPackage(browserPackageName);
-                        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-                        intent.putExtra(Browser.EXTRA_APPLICATION_ID, browserPackageName);
-                        break;
-                }
-            }
-
-            try {
-                activity.startActivity(intent);
-            } catch (ActivityNotFoundException ignored) {
-                Log.w(TAG, "Can't find anything to handle VIEW of URI " + url);
-            }
-
-        }
-    }
-
-    public void quitSynchronously() {
-        state = State.DONE;
-        cameraManager.stopPreview();
-        Message quit = Message.obtain(decodeThread.getHandler(), R.id.quit);
-        quit.sendToTarget();
-        try {
-            // Wait at most half a second; should be enough time, and onPause() will timeout quickly
-            decodeThread.join(500L);
-        } catch (InterruptedException e) {
-            // continue
-        }
-
-        // Be absolutely sure we don't send any queued up messages
-        removeMessages(R.id.decode_succeeded);
-        removeMessages(R.id.decode_failed);
-    }
-
-    public void restartPreviewAndDecode() {
-        if (state == State.SUCCESS) {
-            state = State.PREVIEW;
-            cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
-            activity.drawViewfinder();
-        }
-    }
-
-}
+package com.king.zxing;
+
+import android.app.Activity;
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.provider.Browser;
+import android.util.Log;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.DecodeHintType;
+import com.google.zxing.Result;
+import com.king.zxing.camera.CameraManager;
+
+import java.util.Collection;
+import java.util.Map;
+
+/**
+ * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
+ */
+public class CaptureHandler extends Handler {
+
+    private static final String TAG = CaptureHandler.class.getSimpleName();
+
+    private final OnCaptureListener onCaptureListener;
+    private final DecodeThread decodeThread;
+    private State state;
+    private final CameraManager cameraManager;
+    private final Activity activity;
+    private final ViewfinderView viewfinderView;
+
+
+    private enum State {
+        PREVIEW,
+        SUCCESS,
+        DONE
+    }
+
+    CaptureHandler(Activity activity,ViewfinderView viewfinderView,OnCaptureListener onCaptureListener,
+                   Collection<BarcodeFormat> decodeFormats,
+                   Map<DecodeHintType,?> baseHints,
+                   String characterSet,
+                   CameraManager cameraManager) {
+        this.activity = activity;
+        this.viewfinderView = viewfinderView;
+        this.onCaptureListener = onCaptureListener;
+        decodeThread = new DecodeThread(activity,cameraManager,this, decodeFormats, baseHints, characterSet,
+                new ViewfinderResultPointCallback(viewfinderView));
+        decodeThread.start();
+        state = State.SUCCESS;
+
+        // Start ourselves capturing previews and decoding.
+        this.cameraManager = cameraManager;
+        cameraManager.startPreview();
+        restartPreviewAndDecode();
+    }
+
+    @Override
+    public void handleMessage(Message message) {
+        if (message.what == R.id.restart_preview) {
+            restartPreviewAndDecode();
+
+        } else if (message.what == R.id.decode_succeeded) {
+            state = State.SUCCESS;
+            Bundle bundle = message.getData();
+            Bitmap barcode = null;
+            float scaleFactor = 1.0f;
+            if (bundle != null) {
+                byte[] compressedBitmap = bundle.getByteArray(DecodeThread.BARCODE_BITMAP);
+                if (compressedBitmap != null) {
+                    barcode = BitmapFactory.decodeByteArray(compressedBitmap, 0, compressedBitmap.length, null);
+                    // Mutable copy:
+                    barcode = barcode.copy(Bitmap.Config.ARGB_8888, true);
+                }
+                scaleFactor = bundle.getFloat(DecodeThread.BARCODE_SCALED_FACTOR);
+            }
+            onCaptureListener.onHandleDecode((Result) message.obj, barcode, scaleFactor);
+
+        } else if (message.what == R.id.decode_failed) {// We're decoding as fast as possible, so when one decode fails, start another.
+            state = State.PREVIEW;
+            cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
+
+        } else if (message.what == R.id.return_scan_result) {
+            activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
+            activity.finish();
+
+        } else if (message.what == R.id.launch_product_query) {
+            String url = (String) message.obj;
+
+            Intent intent = new Intent(Intent.ACTION_VIEW);
+            intent.addFlags(Intents.FLAG_NEW_DOC);
+            intent.setData(Uri.parse(url));
+
+            ResolveInfo resolveInfo =
+                    activity.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
+            String browserPackageName = null;
+            if (resolveInfo != null && resolveInfo.activityInfo != null) {
+                browserPackageName = resolveInfo.activityInfo.packageName;
+                Log.d(TAG, "Using browser in package " + browserPackageName);
+            }
+
+            // Needed for default Android browser / Chrome only apparently
+            if (browserPackageName != null) {
+                switch (browserPackageName) {
+                    case "com.android.browser":
+                    case "com.android.chrome":
+                        intent.setPackage(browserPackageName);
+                        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                        intent.putExtra(Browser.EXTRA_APPLICATION_ID, browserPackageName);
+                        break;
+                }
+            }
+
+            try {
+                activity.startActivity(intent);
+            } catch (ActivityNotFoundException ignored) {
+                Log.w(TAG, "Can't find anything to handle VIEW of URI " + url);
+            }
+
+        }
+    }
+
+    public void quitSynchronously() {
+        state = State.DONE;
+        cameraManager.stopPreview();
+        Message quit = Message.obtain(decodeThread.getHandler(), R.id.quit);
+        quit.sendToTarget();
+        try {
+            // Wait at most half a second; should be enough time, and onPause() will timeout quickly
+            decodeThread.join(500L);
+        } catch (InterruptedException e) {
+            // continue
+        }
+
+        // Be absolutely sure we don't send any queued up messages
+        removeMessages(R.id.decode_succeeded);
+        removeMessages(R.id.decode_failed);
+    }
+
+    public void restartPreviewAndDecode() {
+        if (state == State.SUCCESS) {
+            state = State.PREVIEW;
+            cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
+            viewfinderView.drawViewfinder();
+        }
+    }
+}

lib/src/main/java/com/king/zxing/CaptureHelper.java

@@ -0,0 +1,522 @@
+/*
+ * Copyright (C) 2019 Jenly Yu
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.king.zxing;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.hardware.Camera;
+import android.support.v4.app.Fragment;
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.DecodeHintType;
+import com.google.zxing.Result;
+import com.king.zxing.camera.CameraManager;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
+ */
+public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,CaptureManager  {
+
+    public static final String TAG = CaptureHelper.class.getSimpleName();
+
+    private Activity activity;
+
+    private CaptureHandler captureHandler;
+    private OnCaptureListener onCaptureListener;
+
+    private CameraManager cameraManager;
+
+    private InactivityTimer inactivityTimer;
+    private BeepManager beepManager;
+    private AmbientLightManager ambientLightManager;
+
+
+    private ViewfinderView viewfinderView;
+    private SurfaceHolder surfaceHolder;
+    private SurfaceHolder.Callback callback;
+
+    private Collection<BarcodeFormat> decodeFormats;
+    private Map<DecodeHintType,?> decodeHints;
+    private String characterSet;
+
+    private boolean hasSurface;
+    /**
+     * 默认触控误差值
+     */
+    private static final int DEVIATION = 6;
+    /**
+     * 是否支持缩放（变焦），默认支持
+     */
+    private boolean isSupportZoom = true;
+    private float oldDistance;
+    /**
+     * 是否支持连扫，默认不支持
+     */
+    private boolean isContinuousScan = false;
+    /**
+     * 连扫时，是否自动重置预览和解码器，默认自动重置
+     */
+    private boolean isAutoRestartPreviewAndDecode = true;
+    /**
+     * 是否播放音效
+     */
+    private boolean isPlayBeep;
+    /**
+     * 是否震动
+     */
+    private boolean isVibrate;
+
+    private OnCaptureCallback onCaptureCallback;
+
+
+    public CaptureHelper(Fragment fragment, SurfaceView surfaceView, ViewfinderView viewfinderView){
+        this(fragment.getActivity(),surfaceView,viewfinderView);
+
+    }
+
+    public CaptureHelper(Activity activity,SurfaceView surfaceView,ViewfinderView viewfinderView){
+        this.activity = activity;
+        this.viewfinderView = viewfinderView;
+        surfaceHolder = surfaceView.getHolder();
+        hasSurface = false;
+
+    }
+
+    @Override
+    public void onCreate(){
+        inactivityTimer = new InactivityTimer(activity);
+        beepManager = new BeepManager(activity);
+        ambientLightManager = new AmbientLightManager(activity);
+
+        cameraManager = new CameraManager(activity);
+
+        callback = new SurfaceHolder.Callback() {
+            @Override
+            public void surfaceCreated(SurfaceHolder holder) {
+                if (holder == null) {
+                    Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
+                }
+                if (!hasSurface) {
+                    hasSurface = true;
+                    initCamera(holder);
+                }
+            }
+
+            @Override
+            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+
+            }
+
+            @Override
+            public void surfaceDestroyed(SurfaceHolder holder) {
+                hasSurface = false;
+            }
+        };
+
+        onCaptureListener =  new OnCaptureListener() {
+
+            @Override
+            public void onHandleDecode(Result result, Bitmap barcode, float scaleFactor) {
+                inactivityTimer.onActivity();
+                beepManager.playBeepSoundAndVibrate();
+
+                onResult(result);
+            }
+
+        };
+        //设置是否播放音效和震动
+        beepManager.setPlayBeep(isPlayBeep);
+        beepManager.setVibrate(isVibrate);
+    }
+
+
+    /**
+     * {@link Activity#onResume()}
+     */
+    @Override
+    public void onResume(){
+        beepManager.updatePrefs();
+        ambientLightManager.start(cameraManager);
+
+        inactivityTimer.onResume();
+
+        surfaceHolder.addCallback(callback);
+
+        if (hasSurface) {
+            initCamera(surfaceHolder);
+        } else {
+            surfaceHolder.addCallback(callback);
+        }
+    }
+
+    /**
+     * {@link Activity#onPause()}
+     */
+    @Override
+    public void onPause(){
+        if (captureHandler != null) {
+            captureHandler.quitSynchronously();
+            captureHandler = null;
+        }
+        inactivityTimer.onPause();
+        ambientLightManager.stop();
+        beepManager.close();
+        cameraManager.closeDriver();
+        if (!hasSurface) {
+            surfaceHolder.removeCallback(callback);
+        }
+    }
+
+    /**
+     * {@link Activity#onDestroy()}
+     */
+    @Override
+    public void onDestroy(){
+        inactivityTimer.shutdown();
+    }
+
+    /**
+     * 支持缩放时，须在{@link Activity#onTouchEvent(MotionEvent)}调用此方法
+     * @param event
+     */
+    @Override
+    public boolean onTouchEvent(MotionEvent event){
+        if(isSupportZoom && cameraManager.isOpen()){
+            Camera camera = cameraManager.getOpenCamera().getCamera();
+            if(camera ==null){
+                return false;
+            }
+            if(event.getPointerCount() > 1) {
+                switch (event.getAction() & MotionEvent.ACTION_MASK) {//多点触控
+                    case MotionEvent.ACTION_POINTER_DOWN:
+                        oldDistance = calcFingerSpacing(event);
+                        break;
+                    case MotionEvent.ACTION_MOVE:
+                        float newDistance = calcFingerSpacing(event);
+
+                        if (newDistance > oldDistance + DEVIATION) {//
+                            handleZoom(true, camera);
+                        } else if (newDistance < oldDistance - DEVIATION) {
+                            handleZoom(false, camera);
+                        }
+                        oldDistance = newDistance;
+                        break;
+                }
+
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private void initCamera(SurfaceHolder surfaceHolder) {
+        if (surfaceHolder == null) {
+            throw new IllegalStateException("No SurfaceHolder provided");
+        }
+        if (cameraManager.isOpen()) {
+            Log.w(TAG, "initCamera() while already open -- late SurfaceView callback?");
+            return;
+        }
+        try {
+            cameraManager.openDriver(surfaceHolder);
+            // Creating the handler starts the preview, which can also throw a RuntimeException.
+            if (captureHandler == null) {
+                captureHandler = new CaptureHandler(activity,viewfinderView,onCaptureListener, decodeFormats, decodeHints, characterSet, cameraManager);
+            }
+        } catch (IOException ioe) {
+            Log.w(TAG, ioe);
+        } catch (RuntimeException e) {
+            // Barcode Scanner has seen crashes in the wild of this variety:
+            // java.?lang.?RuntimeException: Fail to connect to camera service
+            Log.w(TAG, "Unexpected error initializing camera", e);
+        }
+    }
+
+    /**
+     * 处理变焦缩放
+     * @param isZoomIn
+     * @param camera
+     */
+    private void handleZoom(boolean isZoomIn, Camera camera) {
+        Camera.Parameters params = camera.getParameters();
+        if (params.isZoomSupported()) {
+            int maxZoom = params.getMaxZoom();
+            int zoom = params.getZoom();
+            if (isZoomIn && zoom < maxZoom) {
+                zoom++;
+            } else if (zoom > 0) {
+                zoom--;
+            }
+            params.setZoom(zoom);
+            camera.setParameters(params);
+        } else {
+            Log.i(TAG, "zoom not supported");
+        }
+    }
+
+    /**
+     * 聚焦
+     * @param event
+     * @param camera
+     */
+    private void focusOnTouch(MotionEvent event,Camera camera) {
+
+        Camera.Parameters params = camera.getParameters();
+        Camera.Size previewSize = params.getPreviewSize();
+
+        Rect focusRect = calcTapArea(event.getRawX(), event.getRawY(), 1f,previewSize);
+        Rect meteringRect = calcTapArea(event.getRawX(), event.getRawY(), 1.5f,previewSize);
+        Camera.Parameters parameters = camera.getParameters();
+        if (parameters.getMaxNumFocusAreas() > 0) {
+            List<Camera.Area> focusAreas = new ArrayList<>();
+            focusAreas.add(new Camera.Area(focusRect, 600));
+            parameters.setFocusAreas(focusAreas);
+        }
+
+        if (parameters.getMaxNumMeteringAreas() > 0) {
+            List<Camera.Area> meteringAreas = new ArrayList<>();
+            meteringAreas.add(new Camera.Area(meteringRect, 600));
+            parameters.setMeteringAreas(meteringAreas);
+        }
+        final String currentFocusMode = params.getFocusMode();
+        params.setFocusMode(Camera.Parameters.FOCUS_MODE_MACRO);
+        camera.setParameters(params);
+
+        camera.autoFocus(new Camera.AutoFocusCallback() {
+            @Override
+            public void onAutoFocus(boolean success, Camera camera) {
+                Camera.Parameters params = camera.getParameters();
+                params.setFocusMode(currentFocusMode);
+                camera.setParameters(params);
+            }
+        });
+
+    }
+
+
+    /**
+     * 计算两指间距离
+     * @param event
+     * @return
+     */
+    private float calcFingerSpacing(MotionEvent event) {
+        float x = event.getX(0) - event.getX(1);
+        float y = event.getY(0) - event.getY(1);
+        return (float) Math.sqrt(x * x + y * y);
+    }
+
+    /**
+     * 计算对焦区域
+     * @param x
+     * @param y
+     * @param coefficient
+     * @param previewSize
+     * @return
+     */
+    private Rect calcTapArea(float x, float y, float coefficient, Camera.Size previewSize) {
+        float focusAreaSize = 200;
+        int areaSize = Float.valueOf(focusAreaSize * coefficient).intValue();
+        int centerX = (int) ((x / previewSize.width) * 2000 - 1000);
+        int centerY = (int) ((y / previewSize.height) * 2000 - 1000);
+        int left = clamp(centerX - (areaSize / 2), -1000, 1000);
+        int top = clamp(centerY - (areaSize / 2), -1000, 1000);
+        RectF rectF = new RectF(left, top, left + areaSize, top + areaSize);
+        return new Rect(Math.round(rectF.left), Math.round(rectF.top),
+                Math.round(rectF.right), Math.round(rectF.bottom));
+    }
+
+    /**
+     *
+     * @param x
+     * @param min
+     * @param max
+     * @return
+     */
+    private int clamp(int x, int min, int max) {
+        if (x > max) {
+            return max;
+        }
+        if (x < min) {
+            return min;
+        }
+        return x;
+    }
+
+
+    /**
+     * 重新启动扫码和解码器
+     */
+    public void restartPreviewAndDecode(){
+        if(captureHandler!=null){
+            captureHandler.restartPreviewAndDecode();
+        }
+    }
+
+    /**
+     * 接收扫码结果，想支持连扫时，可将{@link #continuousScan(boolean)}设置为{@code true}
+     * 如果{@link #isContinuousScan}支持连扫，则默认重启扫码和解码器；当连扫逻辑太复杂时，
+     * 请将{@link #autoRestartPreviewAndDecode(boolean)}设置为{@code false}，并手动调用{@link #restartPreviewAndDecode()}
+     * @param result 扫码结果
+     */
+    public void onResult(Result result){
+        String text = result.getText();
+        if(isContinuousScan){
+            if(isAutoRestartPreviewAndDecode){
+                if(onCaptureCallback!=null){
+                    onCaptureCallback.onResultCallback(text);
+                }
+                restartPreviewAndDecode();
+            }
+        }else{
+            //如果设置了回调，并且onCallback返回为true，则表示拦截
+            if(onCaptureCallback!=null && onCaptureCallback.onResultCallback(text)){
+                return;
+            }
+            Intent intent = new Intent();
+            intent.putExtra(Intents.Scan.RESULT,text);
+            activity.setResult(Activity.RESULT_OK,intent);
+            activity.finish();
+        }
+    }
+
+    /**
+     * 设置是否连续扫码，如果想支持连续扫码，则将此方法返回{@code true}并重写{@link #onResult(Result)}
+     */
+    public CaptureHelper continuousScan(boolean isContinuousScan){
+        this.isContinuousScan = isContinuousScan;
+        return this;
+    }
+
+
+    /**
+     * 设置是否自动重启扫码和解码器，当支持连扫时才起作用。
+     * @return 默认返回 true
+     */
+    public CaptureHelper autoRestartPreviewAndDecode(boolean isAutoRestartPreviewAndDecode){
+        this.isAutoRestartPreviewAndDecode = isAutoRestartPreviewAndDecode;
+        return this;
+    }
+
+
+    /**
+     * 设置是否播放音效
+     * @return
+     */
+    public CaptureHelper playBeep(boolean playBeep){
+        this.isPlayBeep = playBeep;
+        if(beepManager!=null){
+            beepManager.setPlayBeep(playBeep);
+        }
+        return this;
+    }
+
+    /**
+     * 设置是否震动
+     * @return
+     */
+    public CaptureHelper vibrate(boolean vibrate){
+        this.isVibrate = vibrate;
+        if(beepManager!=null){
+            beepManager.setVibrate(vibrate);
+        }
+        return this;
+    }
+
+
+    /**
+     * 设置是否支持缩放
+     * @param supportZoom
+     * @return
+     */
+    public CaptureHelper supportZoom(boolean supportZoom) {
+        isSupportZoom = supportZoom;
+        return this;
+    }
+
+    /**
+     *
+     * @param decodeFormats
+     * @return
+     */
+    public CaptureHelper decodeFormats(Collection<BarcodeFormat> decodeFormats) {
+        this.decodeFormats = decodeFormats;
+        return this;
+    }
+
+    /**
+     *
+     * @param decodeHints
+     * @return
+     */
+    public CaptureHelper decodeHints(Map<DecodeHintType,?> decodeHints) {
+        this.decodeHints = decodeHints;
+        return this;
+    }
+
+    /**
+     *
+     * @param characterSet
+     * @return
+     */
+    public CaptureHelper characterSet(String characterSet) {
+        this.characterSet = characterSet;
+        return this;
+    }
+
+    /**
+     * 设置扫码回调
+     * @param callback
+     * @return
+     */
+    public CaptureHelper setOnCaptureCallback(OnCaptureCallback callback) {
+        this.onCaptureCallback = callback;
+        return this;
+    }
+
+    @Override
+    public CameraManager getCameraManager() {
+        return cameraManager;
+    }
+
+    @Override
+    public BeepManager getBeepManager() {
+        return beepManager;
+    }
+
+    @Override
+    public AmbientLightManager getAmbientLightManager() {
+        return ambientLightManager;
+    }
+
+    @Override
+    public InactivityTimer getInactivityTimer() {
+        return inactivityTimer;
+    }
+}

lib/src/main/java/com/king/zxing/CaptureLifecycle.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 Jenly Yu
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.king.zxing;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+/**
+ * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
+ */
+public interface CaptureLifecycle {
+
+    /**
+     * {@link android.app.Activity#onCreate(Bundle)}
+     */
+    void onCreate();
+    /**
+     * {@link Activity#onResume()}
+     */
+    void onResume();
+
+    /**
+     * {@link Activity#onPause()}
+     */
+    void onPause();
+
+    /**
+     * {@link Activity#onDestroy()}
+     */
+    void onDestroy();
+
+}

lib/src/main/java/com/king/zxing/CaptureManager.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2019 Jenly Yu
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.king.zxing;
+
+import com.king.zxing.camera.CameraManager;
+
+/**
+ * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
+ */
+public interface CaptureManager {
+
+    /**
+     * Get {@link CameraManager}
+     * @return {@link CameraManager}
+     */
+    CameraManager getCameraManager();
+
+    /**
+     * Get {@link BeepManager}
+     * @return {@link BeepManager}
+     */
+    BeepManager getBeepManager();
+
+    /**
+     * Get {@link AmbientLightManager}
+     * @return {@link AmbientLightManager}
+     */
+    AmbientLightManager getAmbientLightManager();
+
+    /**
+     * Get {@link InactivityTimer}
+     * @return {@link InactivityTimer}
+     */
+    InactivityTimer getInactivityTimer();
+}

lib/src/main/java/com/king/zxing/CaptureTouchEvent.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2019 Jenly Yu
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.king.zxing;
+
+import android.view.MotionEvent;
+
+/**
+ * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
+ */
+public interface CaptureTouchEvent {
+
+    /**
+     * {@link android.app.Activity#onTouchEvent(MotionEvent)}
+     */
+    boolean onTouchEvent(MotionEvent event);
+}

lib/src/main/java/com/king/zxing/DecodeHandler.java

@@ -23,10 +23,10 @@ import com.google.zxing.DecodeHintType;
 import com.google.zxing.MultiFormatReader;
 import com.google.zxing.NotFoundException;
 import com.google.zxing.PlanarYUVLuminanceSource;
-import com.google.zxing.ReaderException;
 import com.google.zxing.Result;
 import com.google.zxing.common.GlobalHistogramBinarizer;
 import com.google.zxing.common.HybridBinarizer;
+import com.king.zxing.camera.CameraManager;
 
 import android.graphics.Point;
 import android.os.Bundle;
@@ -44,14 +44,18 @@ final class DecodeHandler extends Handler {
 
     private static final String TAG = DecodeHandler.class.getSimpleName();
 
-    private final CaptureActivity activity;
+    private final Context context;
+    private final CameraManager cameraManager;
+    private final Handler handler;
     private final MultiFormatReader multiFormatReader;
     private boolean running = true;
 
-    DecodeHandler(CaptureActivity activity, Map<DecodeHintType,Object> hints) {
+    DecodeHandler(Context context, CameraManager cameraManager,Handler handler, Map<DecodeHintType,Object> hints) {
         multiFormatReader = new MultiFormatReader();
         multiFormatReader.setHints(hints);
-        this.activity = activity;
+        this.context = context;
+        this.cameraManager = cameraManager;
+        this.handler = handler;
     }
 
     @Override
@@ -70,7 +74,7 @@ final class DecodeHandler extends Handler {
     }
 
     private boolean isScreenPortrait(){
-        WindowManager manager = (WindowManager) activity.getSystemService(Context.WINDOW_SERVICE);
+        WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
         Display display = manager.getDefaultDisplay();
         Point screenResolution = new Point();
         display.getSize(screenResolution);
@@ -98,9 +102,9 @@ final class DecodeHandler extends Handler {
             int tmp = width;
             width = height;
             height = tmp;
-            source = activity.getCameraManager().buildLuminanceSource(rotatedData, width, height);
+            source = cameraManager.buildLuminanceSource(rotatedData, width, height);
         }else{
-            source = activity.getCameraManager().buildLuminanceSource(data, width, height);
+            source = cameraManager.buildLuminanceSource(data, width, height);
         }
         if (source != null) {
             BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
@@ -118,7 +122,6 @@ final class DecodeHandler extends Handler {
             }
         }
 
-        Handler handler = activity.getHandler();
         if (rawResult != null) {
             // Don't log the barcode contents for security.
             long end = System.currentTimeMillis();

lib/src/main/java/com/king/zxing/DecodeThread.java

@@ -20,7 +20,9 @@ package com.king.zxing;
 import com.google.zxing.BarcodeFormat;
 import com.google.zxing.DecodeHintType;
 import com.google.zxing.ResultPointCallback;
+import com.king.zxing.camera.CameraManager;
 
+import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Handler;
 import android.os.Looper;
@@ -43,18 +45,23 @@ final class DecodeThread extends Thread {
     public static final String BARCODE_BITMAP = "barcode_bitmap";
     public static final String BARCODE_SCALED_FACTOR = "barcode_scaled_factor";
 
-    private final CaptureActivity activity;
+    private final Context context;
+    private final CameraManager cameraManager;
     private final Map<DecodeHintType,Object> hints;
     private Handler handler;
+    private CaptureHandler captureHandler;
     private final CountDownLatch handlerInitLatch;
 
-    DecodeThread(CaptureActivity activity,
+    DecodeThread(Context context,CameraManager cameraManager,
+                 CaptureHandler captureHandler,
                  Collection<BarcodeFormat> decodeFormats,
                  Map<DecodeHintType,?> baseHints,
                  String characterSet,
                  ResultPointCallback resultPointCallback) {
 
-        this.activity = activity;
+        this.context = context;
+        this.cameraManager = cameraManager;
+        this.captureHandler = captureHandler;
         handlerInitLatch = new CountDownLatch(1);
 
         hints = new EnumMap<>(DecodeHintType.class);
@@ -64,7 +71,7 @@ final class DecodeThread extends Thread {
 
         // The prefs can't change while the thread is running, so pick them up once here.
         if (decodeFormats == null || decodeFormats.isEmpty()) {
-            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
+            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
             decodeFormats = EnumSet.noneOf(BarcodeFormat.class);
             if (prefs.getBoolean(Preferences.KEY_DECODE_1D_PRODUCT, true)) {
                 decodeFormats.addAll(DecodeFormatManager.PRODUCT_FORMATS);
@@ -106,7 +113,7 @@ final class DecodeThread extends Thread {
     @Override
     public void run() {
         Looper.prepare();
-        handler = new DecodeHandler(activity, hints);
+        handler = new DecodeHandler(context,cameraManager,captureHandler, hints);
         handlerInitLatch.countDown();
         Looper.loop();
     }

lib/src/main/java/com/king/zxing/OnCaptureCallback.java

@@ -0,0 +1,16 @@
+package com.king.zxing;
+
+
+
+/**
+ * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
+ */
+public interface OnCaptureCallback {
+
+    /**
+     * 接收扫码结果回调
+     * @param result 扫码结果
+     * @return 返回true表示拦截，将不自动执行后续逻辑，为false表示不拦截
+     */
+    boolean onResultCallback(String result);
+}

lib/src/main/java/com/king/zxing/OnCaptureListener.java

@@ -0,0 +1,22 @@
+package com.king.zxing;
+
+import android.graphics.Bitmap;
+
+import com.google.zxing.Result;
+
+/**
+ * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
+ */
+public interface OnCaptureListener {
+
+
+    /**
+     * 接收解码后的扫码结果
+     * @param result
+     * @param barcode
+     * @param scaleFactor
+     */
+    void onHandleDecode(Result result, Bitmap barcode, float scaleFactor);
+
+
+}

lib/src/main/java/com/king/zxing/camera/CameraManager.java

@@ -66,7 +66,7 @@ public final class CameraManager {
     private final PreviewCallback previewCallback;
 
     public CameraManager(Context context) {
-        this.context = context;
+        this.context = context.getApplicationContext();
         this.configManager = new CameraConfigurationManager(context);
         previewCallback = new PreviewCallback(configManager);
     }

lib/src/main/res/layout/zxl_capture.xml

@@ -1,25 +1,27 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!--
- Copyright (C) 2008 ZXing authors
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-      http://www.apache.org/licenses/LICENSE-2.0
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- -->
-<merge xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <SurfaceView
-        android:id="@+id/preview_view"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
-    <com.king.zxing.ViewfinderView
-        android:id="@+id/viewfinder_view"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
-
-</merge>
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright (C) 2008 ZXing authors
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+      http://www.apache.org/licenses/LICENSE-2.0
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <SurfaceView
+        android:id="@+id/surfaceView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+    <com.king.zxing.ViewfinderView
+        android:id="@+id/viewfinderView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+</FrameLayout>

lib/src/main/res/values/colors.xml

@@ -4,7 +4,7 @@
     <color name="viewfinder_mask">#60000000</color>
     <color name="viewfinder_frame">#7F1FB3E2</color>
     <color name="viewfinder_corner">#FF1FB3E2</color>
-    <color name="viewfinder_laser">#FF1FB3E2</color> <!-- Android standard ICS color -->
+    <color name="viewfinder_laser">#FF1FB3E2</color>
     <color name="viewfinder_result_point_color">#C0FFBD21</color>
     <color name="viewfinder_text_color">#FFC0C0C0</color>