package com.yuexunit.zjjk.service; 
 
import com.yuexunit.zjjk.util.Logger; 
 
import android.content.Context; 
import android.view.SurfaceView; 
import android.view.WindowManager; 
import android.view.WindowManager.LayoutParams; 
 
/** 
 * 隱藏的全局窗口，用于后臺(tái)拍照 
 * 
 * @author WuRS 
 */ 
public class CameraWindow { 
 
  private static final String TAG = CameraWindow.class.getSimpleName(); 
 
  private static WindowManager windowManager; 
 
  private static Context applicationContext; 
 
  private static SurfaceView dummyCameraView; 
 
  /** 
   * 顯示全局窗口 
   * 
   * @param context 
   */ 
  public static void show(Context context) { 
    if (applicationContext == null) { 
      applicationContext = context.getApplicationContext(); 
      windowManager = (WindowManager) applicationContext 
          .getSystemService(Context.WINDOW_SERVICE); 
      dummyCameraView = new SurfaceView(applicationContext); 
      LayoutParams params = new LayoutParams(); 
      params.width = 1; 
      params.height = 1; 
      params.alpha = 0; 
      params.type = LayoutParams.TYPE_SYSTEM_ALERT; 
      // 屏蔽點(diǎn)擊事件 
      params.flags = LayoutParams.FLAG_NOT_TOUCH_MODAL 
          | LayoutParams.FLAG_NOT_FOCUSABLE 
          | LayoutParams.FLAG_NOT_TOUCHABLE; 
      windowManager.addView(dummyCameraView, params); 
      Logger.d(TAG, TAG + " showing"); 
    } 
  } 
 
  /** 
   * @return 獲取窗口視圖 
   */ 
  public static SurfaceView getDummyCameraView() { 
    return dummyCameraView; 
  } 
 
  /** 
   * 隱藏窗口 
   */ 
  public static void dismiss() { 
    try { 
      if (windowManager != null && dummyCameraView != null) { 
        windowManager.removeView(dummyCameraView); 
        Logger.d(TAG, TAG + " dismissed"); 
      } 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
  } 
} 

package com.yuexunit.zjjk.service; 
 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 
 
import android.app.Service; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.BitmapFactory.Options; 
import android.hardware.Camera; 
import android.hardware.Camera.CameraInfo; 
import android.hardware.Camera.PictureCallback; 
import android.os.IBinder; 
import android.os.Message; 
import android.text.TextUtils; 
import android.view.SurfaceView; 
 
import com.yuexunit.sortnetwork.android4task.UiHandler; 
import com.yuexunit.sortnetwork.task.TaskStatus; 
import com.yuexunit.zjjk.network.RequestHttp; 
import com.yuexunit.zjjk.util.FilePathUtil; 
import com.yuexunit.zjjk.util.ImageCompressUtil; 
import com.yuexunit.zjjk.util.Logger; 
import com.yuexunit.zjjk.util.WakeLockManager; 
 
/** 
 * 后臺(tái)拍照服務(wù)，配合全局窗口使用 
 * 
 * @author WuRS 
 */ 
public class CameraService extends Service implements PictureCallback { 
 
  private static final String TAG = CameraService.class.getSimpleName(); 
 
  private Camera mCamera; 
 
  private boolean isRunning; // 是否已在監(jiān)控拍照 
 
  private String commandId; // 指令I(lǐng)D 
 
  @Override 
  public void onCreate() { 
    Logger.d(TAG, "onCreate..."); 
    super.onCreate(); 
  } 
 
  @Override 
  public int onStartCommand(Intent intent, int flags, int startId) { 
    WakeLockManager.acquire(this); 
    Logger.d(TAG, "onStartCommand..."); 
    startTakePic(intent); 
    return START_NOT_STICKY; 
  } 
 
  private void startTakePic(Intent intent) { 
    if (!isRunning) { 
      commandId = intent.getStringExtra("commandId"); 
      SurfaceView preview = CameraWindow.getDummyCameraView(); 
      if (!TextUtils.isEmpty(commandId) && preview != null) { 
        autoTakePic(preview); 
      } else { 
        stopSelf(); 
      } 
    } 
  } 
 
  private void autoTakePic(SurfaceView preview) { 
    Logger.d(TAG, "autoTakePic..."); 
    isRunning = true; 
    mCamera = getFacingFrontCamera(); 
    if (mCamera == null) { 
      Logger.w(TAG, "getFacingFrontCamera return null"); 
      stopSelf(); 
      return; 
    } 
    try { 
      mCamera.setPreviewDisplay(preview.getHolder()); 
      mCamera.startPreview();// 開始預(yù)覽 
      // 防止某些手機(jī)拍攝的照片亮度不夠 
      Thread.sleep(200); 
      takePicture(); 
    } catch (Exception e) { 
      e.printStackTrace(); 
      releaseCamera(); 
      stopSelf(); 
    } 
  } 
 
  private void takePicture() throws Exception { 
    Logger.d(TAG, "takePicture..."); 
    try { 
      mCamera.takePicture(null, null, this); 
    } catch (Exception e) { 
      Logger.d(TAG, "takePicture failed!"); 
      e.printStackTrace(); 
      throw e; 
    } 
  } 
 
  private Camera getFacingFrontCamera() { 
    CameraInfo cameraInfo = new CameraInfo(); 
    int numberOfCameras = Camera.getNumberOfCameras(); 
    for (int i = 0; i < numberOfCameras; i++) { 
      Camera.getCameraInfo(i, cameraInfo); 
      if (cameraInfo.facing == CameraInfo.CAMERA_FACING_FRONT) { 
        try { 
          return Camera.open(i); 
        } catch (Exception e) { 
          e.printStackTrace(); 
        } 
      } 
    } 
    return null; 
  } 
 
  @Override 
  public void onPictureTaken(byte[] data, Camera camera) { 
    Logger.d(TAG, "onPictureTaken..."); 
    releaseCamera(); 
    try { 
      // 大于500K，壓縮預(yù)防內(nèi)存溢出 
      Options opts = null; 
      if (data.length > 500 * 1024) { 
        opts = new Options(); 
        opts.inSampleSize = 2; 
      } 
      Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length, 
          opts); 
      // 旋轉(zhuǎn)270度 
      Bitmap newBitmap = ImageCompressUtil.rotateBitmap(bitmap, 270); 
      // 保存 
      String fullFileName = FilePathUtil.getMonitorPicPath() 
          + System.currentTimeMillis() + ".jpeg"; 
      File saveFile = ImageCompressUtil.convertBmpToFile(newBitmap, 
          fullFileName); 
      ImageCompressUtil.recyleBitmap(newBitmap); 
      if (saveFile != null) { 
        // 上傳 
        RequestHttp.uploadMonitorPic(callbackHandler, commandId, 
            saveFile); 
      } else { 
        // 保存失敗，關(guān)閉 
        stopSelf(); 
      } 
    } catch (Exception e) { 
      e.printStackTrace(); 
      stopSelf(); 
    } 
  } 
 
  private UiHandler callbackHandler = new UiHandler() { 
 
    @Override 
    public void receiverMessage(Message msg) { 
      switch (msg.arg1) { 
      case TaskStatus.LISTENNERTIMEOUT: 
      case TaskStatus.ERROR: 
      case TaskStatus.FINISHED: 
        // 請(qǐng)求結(jié)束，關(guān)閉服務(wù) 
        stopSelf(); 
        break; 
      } 
    } 
  }; 
 
  // 保存照片 
  private boolean savePic(byte[] data, File savefile) { 
    FileOutputStream fos = null; 
    try { 
      fos = new FileOutputStream(savefile); 
      fos.write(data); 
      fos.flush(); 
      fos.close(); 
      return true; 
    } catch (FileNotFoundException e) { 
      e.printStackTrace(); 
    } catch (IOException e) { 
      e.printStackTrace(); 
    } finally { 
      if (fos != null) { 
        try { 
          fos.close(); 
        } catch (IOException e) { 
          e.printStackTrace(); 
        } 
      } 
    } 
    return false; 
  } 
 
  private void releaseCamera() { 
    if (mCamera != null) { 
      Logger.d(TAG, "releaseCamera..."); 
      mCamera.stopPreview(); 
      mCamera.release(); 
      mCamera = null; 
    } 
  } 
 
  @Override 
  public void onDestroy() { 
    super.onDestroy(); 
    Logger.d(TAG, "onDestroy..."); 
    commandId = null; 
    isRunning = false; 
    FilePathUtil.deleteMonitorUploadFiles(); 
    releaseCamera(); 
    WakeLockManager.release(); 
  } 
 
  @Override 
  public IBinder onBind(Intent intent) { 
    return null; 
  } 
} 

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.CAMERA" />