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;

}

}