Capture image without surface view as background service in android

Capture image without user knowledge in android/Capture image as background service in android/Take photo without preview in android/ Camera without preview in android 

package com.example.picture; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.app.Service; import android.content.Context; import android.content.Intent; import android.hardware.Camera; import android.hardware.Camera.Parameters; import android.media.AudioManager; import android.os.IBinder; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; public class CameraService extends Service {       //Camera variables       //a surface holder       private SurfaceHolder sHolder;        //a variable to control the camera       private Camera mCamera;       //the camera parameters       private Parameters parameters;       /** Called when the activity is first created. */     @Override     public void onCreate()     {         super.onCreate();               }     @Override     public void onStart(Intent intent, int startId) {       // TODO Auto-generated method stub       super.onStart(intent, startId);              mCamera = Camera.open();        SurfaceView sv = new SurfaceView(getApplicationContext());            try {                   mCamera.setPreviewDisplay(sv.getHolder());                   parameters = mCamera.getParameters();                                        //set camera parameters                  mCamera.setParameters(parameters);                  mCamera.startPreview();                  mCamera.takePicture(null, null, mCall);                          } catch (IOException e) {                   // TODO Auto-generated catch block                   e.printStackTrace();             }                        //Get a surface          sHolder = sv.getHolder();         //tells Android that this surface will have its data constantly replaced          sHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);     }                 Camera.PictureCallback mCall = new Camera.PictureCallback()     {           public void onPictureTaken(byte[] data, Camera camera)        {              //decode the data obtained by the camera into a Bitmap                    FileOutputStream outStream = null;                   try{                       outStream = new FileOutputStream("/sdcard/Image.jpg");                       outStream.write(data);                       outStream.close();                   } catch (FileNotFoundException e){                       Log.d("CAMERA", e.getMessage());                   } catch (IOException e){                       Log.d("CAMERA", e.getMessage());                   }              }     };       @Override       public IBinder onBind(Intent intent) {             // TODO Auto-generated method stub             return null;       } }

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