public class MainActivity extends AppCompatActivity {  static final String TAG = "CAMERA ACTIVITY";  //Camera object  Camera mCamera;  //Preview surface  SurfaceView surfaceView;  //Preview surface handle for callback  SurfaceHolder surfaceHolder;  //Camera button  Button btnCapture;  //Note if preview windows is on.  boolean previewing;  int mCurrentCamIndex = 0;  private AudioManager manager;  private int volumn;  private boolean canTake=false;  private ImageView imageView;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    btnCapture = (Button) findViewById(R.id.btn_capture);    imageView =(ImageView)findViewById(R.id.iv);    btnCapture.setOnClickListener(new Button.OnClickListener() {      public void onClick(View arg0) {        canTake=true;      }    });    surfaceView = (SurfaceView) findViewById(R.id.surfaceView1);    surfaceHolder = surfaceView.getHolder();    surfaceHolder.addCallback(new SurfaceViewCallback());    //surfaceHolder.addCallback(this);    surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);  }  public void getSurfacePic(byte[] data, Camera camera,String name){    Camera.Size size = camera.getParameters().getPreviewSize();    YuvImage image = new YuvImage(data, ImageFormat.NV21, size.width, size.height, null);    if(image!=null){      ByteArrayOutputStream stream = new ByteArrayOutputStream();      image.compressToJpeg(new Rect(0, 0, size.width, size.height), 80, stream);      Bitmap bmp = BitmapFactory.decodeByteArray(stream.toByteArray(), 0, stream.size());      //**********************      //因?yàn)閳D片會(huì)放生旋轉(zhuǎn)，因此要對(duì)圖片進(jìn)行旋轉(zhuǎn)到和手機(jī)在一個(gè)方向上      rotateMyBitmap(bmp,name);      //**********************************    }  }  /** 保存方法 */  public void saveBitmap(Bitmap bm,String name) {    Log.e(TAG, "保存圖片");    File f = new File("/sdcard/namecard/", name);    if (f.exists()) {      f.delete();    }    try {      FileOutputStream out = new FileOutputStream(f);      bm.compress(Bitmap.CompressFormat.PNG, 90, out);      out.flush();      out.close();      Log.e(TAG, "已經(jīng)保存");    } catch (FileNotFoundException e) {      // TODO Auto-generated catch block      e.printStackTrace();    } catch (IOException e) {      // TODO Auto-generated catch block      e.printStackTrace();    }  }  /**   * 保存圖片到指定文件夾   *   * @param bmp   * @return   */  private boolean saveBitmapTofile(byte[] bmp) {    String fileName = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)        .toString()        + File.separator        + "PicTest_" + System.currentTimeMillis() + ".jpg";    File file = new File(fileName);    if (!file.getParentFile().exists()) {      file.getParentFile().mkdir();    }    try {      BufferedOutputStream bos = new BufferedOutputStream(          new FileOutputStream(file));      bos.write(bmp);      bos.flush();      bos.close();      scanFileToPhotoAlbum(file.getAbsolutePath());      Toast.makeText(MainActivity.this, "[Test] Photo take and store in" + file.toString(),Toast.LENGTH_LONG).show();    } catch (Exception e) {      Toast.makeText(MainActivity.this, "Picture Failed" + e.toString(),          Toast.LENGTH_LONG).show();    }    return true;  }  public void saveMyBitmap(Bitmap mBitmap,String bitName) {    String fileName = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)        .toString()        + File.separator        + "PicTest_" + System.currentTimeMillis() + ".jpg";    File file = new File(fileName);    if (!file.getParentFile().exists()) {      file.getParentFile().mkdir();    }    FileOutputStream fOut = null;    try {      fOut = new FileOutputStream(file);    } catch (FileNotFoundException e) {      e.printStackTrace();    }    try {      if (null != fOut) {        mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOut);        fOut.flush();        fOut.close();      }    } catch (Exception e) {      e.printStackTrace();    }  }  public void rotateMyBitmap(Bitmap bmp,String name){    //*****旋轉(zhuǎn)一下    Matrix matrix = new Matrix();    matrix.postRotate(270);    Bitmap bitmap = Bitmap.createBitmap(bmp.getWidth(), bmp.getHeight(), Bitmap.Config.RGB_565);    Bitmap nbmp2 = Bitmap.createBitmap(bmp, 0,0, bmp.getWidth(), bmp.getHeight(), matrix, true);    saveMyBitmap(compressImage(nbmp2),"cool");    //*******顯示一下    imageView.setImageBitmap(nbmp2);  };  /**   * 壓縮圖片   *   * @param image   * @return   */  public static Bitmap compressImage(Bitmap image) {    ByteArrayOutputStream baos = new ByteArrayOutputStream();    // 質(zhì)量壓縮方法，這里100表示不壓縮，把壓縮后的數(shù)據(jù)存放到baos中    image.compress(Bitmap.CompressFormat.JPEG, 100, baos);    // 把壓縮后的數(shù)據(jù)baos存放到ByteArrayInputStream中    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());    // 把ByteArrayInputStream數(shù)據(jù)生成圖片    Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);    return bitmap;  }  Camera.ShutterCallback shutterCallback = new Camera.ShutterCallback() {    @Override    public void onShutter() {    }  };  Camera.PictureCallback rawPictureCallback = new Camera.PictureCallback() {    @Override    public void onPictureTaken(byte[] arg0, Camera arg1) {    }  };  Camera.PictureCallback jpegPictureCallback = new Camera.PictureCallback() {    @Override    public void onPictureTaken(byte[] arg0, Camera arg1) {      String fileName = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)          .toString()          + File.separator          + "PicTest_" + System.currentTimeMillis() + ".jpg";      File file = new File(fileName);      if (!file.getParentFile().exists()) {        file.getParentFile().mkdir();      }      try {        BufferedOutputStream bos = new BufferedOutputStream(            new FileOutputStream(file));        bos.write(arg0);        bos.flush();        bos.close();        scanFileToPhotoAlbum(file.getAbsolutePath());        Toast.makeText(MainActivity.this, "[Test] Photo take and store in" + file.toString(),Toast.LENGTH_LONG).show();      } catch (Exception e) {        Toast.makeText(MainActivity.this, "Picture Failed" + e.toString(),            Toast.LENGTH_LONG).show();      }    };  };  public void setVolumnSilence(){    manager = (AudioManager) this        .getSystemService(Context.AUDIO_SERVICE);    manager.setStreamMute(AudioManager.STREAM_SYSTEM, false);    volumn = manager.getStreamVolume(AudioManager.STREAM_SYSTEM);    if (volumn != 0) {      // 如果需要靜音并且當(dāng)前未靜音（muteMode的設(shè)置可以放在Preference中）      manager.setStreamVolume(AudioManager.STREAM_SYSTEM, 0,          AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);    }  }  public void scanFileToPhotoAlbum(String path) {    MediaScannerConnection.scanFile(MainActivity.this,        new String[] { path }, null,        new MediaScannerConnection.OnScanCompletedListener() {          public void onScanCompleted(String path, Uri uri) {            Log.i("TAG", "Finished scanning " + path);          }        });  }  public void cameraRefresh(String picPath) {    Toast.makeText(this,picPath,Toast.LENGTH_SHORT).show();  }  private final class SurfaceViewCallback implements android.view.SurfaceHolder.Callback {    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3)    {      if (previewing) {        mCamera.stopPreview();        previewing = false;      }      try {        mCamera.setPreviewDisplay(arg0);        mCamera.startPreview();        previewing = true;        setCameraDisplayOrientation(MainActivity.this, mCurrentCamIndex, mCamera);      } catch (Exception e) {}    }    public void surfaceCreated(SurfaceHolder holder) {//       mCamera = Camera.open();      //change to front camera      mCamera = openFrontFacingCameraGingerbread();      // get Camera parameters      Camera.Parameters params = mCamera.getParameters();      List<String> focusModes = params.getSupportedFocusModes();      if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {        // Autofocus mode is supported      }      mCamera.setPreviewCallback(new Camera.PreviewCallback() {        @Override        public void onPreviewFrame(byte[] bytes, Camera camera) {          Log.e("stuart","onPreviewFrame "+canTake);          if(canTake) {            getSurfacePic(bytes, camera, "hahahaah");            canTake=false;          }        }      });    }    public void surfaceDestroyed(SurfaceHolder holder) {      mCamera.stopPreview();      mCamera.release();      mCamera = null;      previewing = false;    }  }  private Camera openFrontFacingCameraGingerbread() {    int cameraCount = 0;    Camera cam = null;    Camera.CameraInfo cameraInfo = new Camera.CameraInfo();    cameraCount = Camera.getNumberOfCameras();    for (int camIdx = 0; camIdx < cameraCount; camIdx++) {      Camera.getCameraInfo(camIdx, cameraInfo);      if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {        try {          cam = Camera.open(camIdx);          mCurrentCamIndex = camIdx;        } catch (RuntimeException e) {          Log.e(TAG, "Camera failed to open: " + e.getLocalizedMessage());        }      }    }    return cam;  }  private static void setCameraDisplayOrientation(Activity activity, int cameraId, Camera camera)  {    Camera.CameraInfo info = new Camera.CameraInfo();    Camera.getCameraInfo(cameraId, info);    int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();    //degrees the angle that the picture will be rotated clockwise. Valid values are 0, 90, 180, and 270.    //The starting position is 0 (landscape).    int degrees = 0;    switch (rotation)    {      case Surface.ROTATION_0: degrees = 0; break;      case Surface.ROTATION_90: degrees = 90; break;      case Surface.ROTATION_180: degrees = 180; break;      case Surface.ROTATION_270: degrees = 270; break;    }    int result;    if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT)    {      result = (info.orientation + degrees) % 360;      result = (360 - result) % 360; // compensate the mirror    }    else    {      // back-facing      result = (info.orientation - degrees + 360) % 360;    }    camera.setDisplayOrientation(result);  }}