Android的圖片捕捉從surfaceView

Question

我試圖捕捉圖像，其中預覽在一個surfaceview，並有一個按鈕拍攝的照片和保存到存儲卡.preview和捕獲工作正常，但無法存儲在存儲卡上。 。 有創建文件，但圖中未存儲一一... plz幫助我...我 嘗試一個在這裏....

public class MainActivity extends Activity { 
    int TAKE_PHOTO_CODE = 0; 
    public static int count=0; 

    Camera mCamera; 
    private CameraView cameraview; 
    RelativeLayout mainlayout; 
    ImageView capture; 
    ImageView image; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     cameraview = new CameraView(this, CameraInfo.CAMERA_FACING_BACK); 
     setContentView(R.layout.activity_main); 
     mainlayout = (RelativeLayout) findViewById(R.id.mainlayout); 
     mainlayout.addView(cameraview); 
     capture=(ImageView)findViewById(R.id.capture); 
     ///////////////////////////////////////////////////////// 
     final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/"; 
      File newdir = new File(dir); 
      newdir.mkdirs(); 


     capture.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 
       // TODO Auto-generated method stub 
       //if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) { 
        // getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE); 

       cameraview.mCamera.takePicture(shutterCallback, rawCallback, 
          jpegCallback); 


        Toast.makeText(getApplicationContext(), "Captured", 2000).show(); 

      } 
     }); 
    } 



    ShutterCallback shutterCallback = new ShutterCallback() { 
     public void onShutter() { 
      // Log.d(TAG, "onShutter'd"); 
     } 
    }; 

    /** Handles data for raw picture */ 
    PictureCallback rawCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
       //Log.d(TAG, "onPictureTaken - raw"); 
     } 
    }; 

    /** Handles data for jpeg picture */ 
    PictureCallback jpegCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
       FileOutputStream outStream = null; 
       try { 

        outStream = new FileOutputStream(String.format(
           "/sdcard/Demo%d.jpg", System.currentTimeMillis())); 
        outStream.write(data); 
        outStream.close(); 

       } catch (FileNotFoundException e) { 
        e.printStackTrace(); 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 

     } 
    }; 



} 

和我CameraView類是在這裏..

public class CameraView extends SurfaceView implements SurfaceHolder.Callback { 

    SurfaceHolder mHolder; 
    Camera mCamera; 
    int mCameraFacingInfo; 
    Context m_context; 


    public CameraView(Context context, int camereface) { 
     super(context); 
     // TODO Auto-generated constructor stub 
     m_context = context; 
     mCameraFacingInfo = camereface; 
     mHolder = getHolder(); 
     mHolder.addCallback(this); 
     mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    } 

    @Override 
    public void surfaceChanged(SurfaceHolder holder, int format, int width, 
      int height) { 
     // TODO Auto-generated method stub 
     if (mCamera != null) { 

      int rotation = ((Activity) m_context).getWindowManager() 
        .getDefaultDisplay().getRotation(); 
      if (rotation == Surface.ROTATION_0 
        || rotation == Surface.ROTATION_180) { 

       mCamera.setDisplayOrientation(90); 
      } else if (rotation == Surface.ROTATION_90) { 

       mCamera.setDisplayOrientation(0); 
      } else if (rotation == Surface.ROTATION_270) { 

       mCamera.setDisplayOrientation(180); 
      } 

      Camera.Parameters parameters = mCamera.getParameters(); 
      parameters.setPreviewSize(width, height); 
      // mCamera.setParameters(parameters); 
      mCamera.startPreview(); 
     } 

    } 

    @TargetApi(Build.VERSION_CODES.GINGERBREAD) 
    @SuppressLint("NewApi") 
    @Override 
    public void surfaceCreated(SurfaceHolder holder) { 
     // TODO Auto-generated method stub 

     // //////////////////////////////////////////////////// 
     /*mCamera.setCameraViewDisplay(holder); 

     mCamera.setCameraViewCallback(new CameraViewCallback() { 

      public void onPreviewFrame(byte[] data, Camera arg1) { 
       // 
       CameraView.this.invalidate(); 
      } 
     }); 
*/ 
     // ////////////////////////////////////////// 
     synchronized (this) { 
      int cameraFacingInfo = -1; 
      boolean errorFound = false; 

      boolean hasFeatCamera = m_context.getPackageManager() 
        .hasSystemFeature(PackageManager.FEATURE_CAMERA); 

      if (hasFeatCamera) { 

       try { 

        cameraFacingInfo = mCameraFacingInfo; 
        mCamera = Camera.open(cameraFacingInfo); 
       } catch (Exception e) { 
        mCamera = Camera.open(0); 
       } 

      } else if (CameraInfo.CAMERA_FACING_FRONT > -1) { 

       try { 
        cameraFacingInfo = CameraInfo.CAMERA_FACING_FRONT; 
        mCamera = Camera.open(cameraFacingInfo); 
       } catch (Exception e) { 
        errorFound = true; 

       } 

       if (errorFound == true) { 
        try { 
         mCamera = Camera.open(0); 
         cameraFacingInfo = 0; 
        } catch (Exception e) { 

         cameraFacingInfo = -1; 
        } 
       } 
      } 

      if (cameraFacingInfo < 0) { 
       Toast.makeText(m_context, "No camera found.", Toast.LENGTH_LONG) 
         .show(); 
      } 

      if (mCamera != null) { 
       try { 
        mCamera.setPreviewDisplay(holder); 

        int rotation = ((Activity) m_context).getWindowManager() 
          .getDefaultDisplay().getRotation(); 
        if (rotation == Surface.ROTATION_0 
          || rotation == Surface.ROTATION_180) { 
         // Log.i(TAG, "0"); 
         mCamera.setDisplayOrientation(90); 
        } else if (rotation == Surface.ROTATION_90) { 
         // Log.i(TAG, "90"); 
         mCamera.setDisplayOrientation(0); 
        } else if (rotation == Surface.ROTATION_270) { 
         // Log.i(TAG, "270"); 
         mCamera.setDisplayOrientation(180); 
        } 

       } catch (IOException exception) { 
        mCamera.release(); 
        mCamera = null; 
        // TODO: add more exception handling logic here 
       } 
      } 
     } 
    } 

    @Override 
    public void surfaceDestroyed(SurfaceHolder holder) { 
     // TODO Auto-generated method stub 
     if (mCamera != null) { 
      mCamera.stopPreview(); 
      mCamera.release(); 
      mCamera = null; 
     } 
    } 

    public void setCameraFacingInfo(int cameraFacingInfo) { 
     mCameraFacingInfo = cameraFacingInfo; 
    } 
} 

Answer 1

試着改變你的jpegCa llback類這樣的：

PictureCallback jpegCallback = new PictureCallback() { 
public void onPictureTaken(byte[] data, Camera camera) { 

    //Creating empty file in sdcard 
    File pictureFile = new File(String.format("/sdcard/Demo%d.jpg", System.currentTimeMillis())); 
    if (pictureFile == null) { 
     Log.e("IMAGE CAPTURE", "Error creating media file, check storage permissions: "); 
     return; 
    } 

    if (data != null) { 

     BitmapFactory.Options opts = new BitmapFactory.Options(); 

     ActivityManager activityManager = (ActivityManager) MainActivity.this.getSystemService(Activity.ACTIVITY_SERVICE); 
     int memoryLimit = 100; 
     if (activityManager != null) { 
      memoryLimit = activityManager.getMemoryClass(); 
     } 

     // Considering memory limitation of device we will resize image to prevent OutOfMemory 
     if (memoryLimit < 20) { 
      opts.inSampleSize = 6; 
     } else if (memoryLimit < 40) { 
      opts.inSampleSize = 4; 
     } else if (memoryLimit < 64) { 
      opts.inSampleSize = 2; 
     } 

     Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length, opts); 

     try { 
      FileOutputStream fos = new FileOutputStream(pictureFile); 
      if (bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fos)) { 
       fos.close(); 
      } 
      bitmap.recycle(); 
     } catch (FileNotFoundException e) { 
     } catch (IOException e) { 
     } 
    } 
}