La revisión de la imagen no se muestra después de camera.takePicture

Question

En todos los teléfonos que he probado, incluido el Galaxy Nexus con API 2.3.7 y 4.0 después de que el método takePicture se denomina cambios de la vista de superficie en la imagen que se tomó, "Revision de imagen".

que he probado en estos dispositivos de tableta y la revisión de la imagen no se presentó: XOOM API 3.1 Galaxy Tab 10.1 API 3.1 Galaxy Tab 10.1 API 3,2

surfaceView = (SurfaceView)findViewById(R.id.surfaceView); 

surfaceHolder = surfaceView.getHolder(); 
surfaceHolder.addCallback(this); 
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 

... 

    public void takePicture() { 
     cam.takePicture(this, null, this); //Shuttercallback, RawCallback, JpegCallback 
    } 

... 

    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {  
    // Stop preview before changing camera parameters 
    if(isPreviewRunning) { 
     this.cam.stopPreview(); 
    } 

    Camera.Parameters p = this.cam.getParameters(); 
    LogUtils.info("CheckCapture", "Preview Size: " + String.valueOf(width) +"x" + String.valueOf(height)); 
    p.setPreviewSize(width, height); 

    //Set picture size to a multiple of previewSize to maintain aspect ratio AND minimum capture width 
    //LogUtils.info("CheckCapture", "Picture Size: " + String.valueOf(width*factor) +"x" + String.valueOf(height*factor)); 
    p.setPictureSize(width, height); 
    p.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO); 

    //Set picture format (we can check device capabilities, but all devices at API level 8 should support JPEG) 
    p.setPictureFormat(PixelFormat.JPEG); 

    //Set new camera parameters 
    try { 
     this.cam.setParameters(p); 
    }catch (Exception e) { 
     e.printStackTrace(); 
    } 

    //Setup preview display on our surfaceViewHolder 
    try { 
     this.cam.setPreviewDisplay(surfaceHolder); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    //Start preview 
    this.cam.startPreview(); 
    this.isPreviewRunning = true; 
} 

Answer 1

sobre el uso btn_click.onclickListener método de devolución de llamada como sigue

_btn_click.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View arg0) { 
      ShutterCallback shutterCallBack = new ShutterCallback() { 
       @Override 
       public void onShutter() {} 
      }; 

      PictureCallback pictureCallBack = new PictureCallback() { 
       @Override 
       public void onPictureTaken(byte[] data, Camera camera) {} 
      }; 

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

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

       } 
      }; 
      setFlashMode(); 
      camera.takePicture(shutterCallBack, pictureCallBack, 
        pictureCallBackJPG); 
      showProgressDialog("Bitte warten", CameraCaptureActivity.this); 
     } 
    }); 

en esta línea principal código es

Bitmap capturedBit map = BitmapFactory.decodeByteArray (data, 0, data.length);

use capturedBitmap en imageview.setImageBitmap (capturedBitmap); para mostrar la imagen

feliz Codificación