Camera Objekt speichert Bild nicht?

public class MainActivity extends Activity {
	
	  private Camera camera;
	  private int cameraId = 0;

	  @Override
	  public void onCreate(Bundle savedInstanceState) 
	  {
	    super.onCreate(savedInstanceState);
	    setContentView(R.layout.activity_main);

	    // do we have a camera?
	    if (!getPackageManager()
	        .hasSystemFeature(PackageManager.FEATURE_CAMERA)) 
	    {
	      Toast.makeText(this, "No camera on this device", 
	    		  		Toast.LENGTH_LONG)
	          .show();
	    } 
	    else 
	    {
	      cameraId = findFrontFacingCamera();
	      if (cameraId < 0) 
	      {
	        Toast.makeText(this, "No front facing camera found.",
	            Toast.LENGTH_LONG).show();
	      } 
	      else 
	      {
	    	System.out.println("CameaId:" + cameraId);
	        camera = Camera.open(cameraId);
	      }
	    }
	  }

	  
	  public void onClick(View view) 
	  {
		System.out.println("On Click Event");
	    camera.takePicture(null, null, 
	        new PhotoHandler(getApplicationContext()));
	    System.out.println("after Take picture");
	    }

	  private int findFrontFacingCamera() 
	  {
	    int cameraId = -1;
	    // Search for the front facing camera
	    int numberOfCameras = Camera.getNumberOfCameras();
	    for (int i = 0; i < numberOfCameras; i++) 
	    {
	      CameraInfo info = new Camera.CameraInfo();
	      Camera.getCameraInfo(i, info);
	      if (info.facing == CameraInfo.CAMERA_FACING_FRONT) 
	      {
	    	System.out.println("Camera found");
	        cameraId = i;
	        break;
	      }      
	    }
	    return cameraId;
	  }

	  @Override
	  protected void onPause() 
	  {
	    if (camera != null) 
	    {
	      camera.release();
	      camera = null;
	    }
	    super.onPause();
	  }
}

public class PhotoHandler implements PictureCallback {

  private final Context context;

  public PhotoHandler(Context context) 
  {
    this.context = context;
    System.out.println("in Photo Handler");
  }

  @Override
  public void onPictureTaken(byte[] data, Camera camera) 
  {

    File pictureFileDir = getDir();

    if (!pictureFileDir.exists() && !pictureFileDir.mkdirs()) 
    {
      System.out.println("Can't create directory to save image.");
      Toast.makeText(context, "Can't create directory to save image.",
          Toast.LENGTH_LONG).show();
      return;
    }

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyymmddhhmmss");
    String date = dateFormat.format(new Date());
    String photoFile = "Picture_" + date + ".jpg";

    String filename = pictureFileDir.getPath() + File.separator 
    										   + photoFile;
    System.out.println("Filename: " + filename);
    Log.v("Camera", "Filename: "+ filename);

    File pictureFile = new File(filename);

    try 
    {
      FileOutputStream fos = new FileOutputStream(pictureFile);
      fos.write(data);
      fos.close();
      System.out.println("Photo saved");
      Toast.makeText(context, "New Image saved:" + photoFile,
          Toast.LENGTH_LONG).show();
    } 
    catch (Exception error) 
    {
    	System.out.println("File" + filename + "not saved: " + 
    			error.getMessage());
      Toast.makeText(context, "Image could not be saved.",
          Toast.LENGTH_LONG).show();
    }
  }

  private File getDir() {
    File sdDir = Environment
      .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
    return new File(sdDir, "CameraAPIDemo");
  }
}

package com.example.test1;

import java.io.IOException;

import android.support.v7.app.ActionBarActivity;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceView;
import android.view.View;

public class MainActivity extends ActionBarActivity {

	Camera cam;
	Parameters parma;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		try
		{
			cam = Camera.open(0);
			System.out.println("Camera open");
		}
		catch(RuntimeException e)
		{
			System.out.println("Camera not open");
		}
		parma = cam.getParameters();
		cam.setParameters(parma);
		
		SurfaceView view = new SurfaceView(this);
		try 
		{
			cam.setPreviewDisplay(view.getHolder());
			cam.startPreview();
		} 
		catch (IOException e) 
		{
			e.printStackTrace();
			System.out.println("Fail start Preview");
		}
		
		
		
		
	}
	
	public void onClick(View view)
	{
		System.out.println("On Click");
		cam.takePicture(shutterCallback, rawCallback, jpgCallback);
		System.out.println("Nach Picture Taken");
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	
	PictureCallback jpgCallback = new PictureCallback()
	{
		public void onPictureTaken(byte[] data, Camera camera)
		{
			System.out.println("OnPictureTaken");
			camera.stopPreview();
			camera.release();
		}
	};
	
	ShutterCallback shutterCallback = new ShutterCallback()
	{
		public void onShutter()
		{
			System.out.println("On Shutter");
		}
		
	};
	
	PictureCallback rawCallback = new PictureCallback()
	{
		public void onPictureTaken(byte[] data, Camera camera)
		{
			System.out.println("OnPictureTaken - raw");
			camera.stopPreview();
			camera.release();
		}
	};
	
	
}