Kamera-Vorschau wird nicht neu gestartet?

Arbeite ich an den Kamera-code in android Bild nehmen und speichern Sie es auf dem Handy. Es nimmt das Bild von Handy-Kamera, und speichert diese auf der Speicherkarte. Das problem ist nur, dass die Kamera-Vorschau wird nicht neu starten, nach der Aufnahme des Bildes.

Ich kann nicht herausfinden, die Lösung. Code ist wie folgt. Vorschläge erforderlich sind . . .
Es gibt zwei Klassen in meinem Projekt . . .

CAMERAACTIVITY KLASSE

public class CameraActivity extends Activity 
{

  private static final String TAG = "CameraDemo";
  Preview preview; 
  Button buttonClick; 

  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    preview = new Preview(this); 
    ((FrameLayout) findViewById(R.id.preview)).addView(preview); 

    buttonClick = (Button) findViewById(R.id.buttonClick);
    buttonClick.setOnClickListener(new OnClickListener() {
      public void onClick(View v) { 
        preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback);    
      }
    });

    Log.d(TAG, "onCreate'd");
  }

  //Called when shutter is opened
  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 {
        //Write to SD Card
        outStream = new FileOutputStream(String.format("/sdcard/DCIM/queries.jpg",
            System.currentTimeMillis()));
        outStream.write(data);
        outStream.close();
        Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length);
      } catch (FileNotFoundException e) { 
        e.printStackTrace();
      } catch (IOException e) {
        e.printStackTrace();
      } finally {
      }
      Log.d(TAG, "onPictureTaken - jpeg");

    }
  };

}

Album Vorhören Klasse

class Preview extends SurfaceView implements SurfaceHolder.Callback{ 
  private static final String TAG = "Preview";

  SurfaceHolder mHolder;  //<2>
  public Camera camera; //<3>

  Preview(Context context) {
    super(context);

    //Install a SurfaceHolder.Callback so we get notified when the
    //underlying surface is created and destroyed.
    mHolder = getHolder();  //<4>
    mHolder.addCallback(this);  //<5>
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); //<6>

  }

  //Called once the holder is ready
  public void surfaceCreated(SurfaceHolder holder) {  //<7>
    //The Surface has been created, acquire the camera and tell it where
    //to draw.
    camera = Camera.open(); //<8>
    try {


        Camera.Parameters parameters = camera.getParameters();
        parameters.set("orientation", "landscape");
        camera.setParameters(parameters);
        camera.setPreviewDisplay(holder);  

        camera.setPreviewCallback(new PreviewCallback() { 
        //Called for each frame previewed
        public void onPreviewFrame(byte[] data, Camera camera) {  
          Log.d(TAG, "onPreviewFrame called at: " + System.currentTimeMillis());
          Preview.this.invalidate();  
        }
      });
    } catch (IOException e) { 
      e.printStackTrace();
    }

  }

  //Called when the holder is destroyed
  public void surfaceDestroyed(SurfaceHolder holder) { 
    //Log.d(TAG,"Stopping preview in SurfaceDestroyed().");
    camera.setPreviewCallback(null);
    camera.stopPreview();
    camera.release();
    camera = null;           
  }

  //Called when holder has changed
  public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 
    camera.startPreview();
  }

}

InformationsquelleAutor user1388142 | 2012-06-06