Open front camera in android program

How to access front camera in android/get number of cameras in android/Program to open front camera in android

Using the code explained below, we can easily find out number of cameras in your android device.

Camera.CameraInfo cameraInfo = newCamera.CameraInfo();

        Log.d("No of cameras",Camera.getNumberOfCameras()+"");

        for (int camNo = 0; camNo < Camera.getNumberOfCameras(); camNo++) {

            CameraInfo camInfo = new CameraInfo();

            Camera.getCameraInfo(camNo, camInfo);

           

            if (camInfo.facing==(Camera.CameraInfo.CAMERA_FACING_FRONT)) {

                mCamera = Camera.open(camNo);

            }

        }

        if (mCamera == null) {

           // no front-facing camera, use the first back-facing camera instead.

           // you may instead wish to inform the user of an error here...

             mCamera = Camera.open();

        }

A sample program that take photo using front camera (or back camera if there is no front camera)as background service

package com.project.smartstay.browserapplication;

import java.io.IOException;

import android.app.Service;

import android.content.Context;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.hardware.Camera;

import android.hardware.Camera.CameraInfo;

import android.hardware.Camera.Parameters;

import android.media.AudioManager;

import android.media.FaceDetector;

import android.media.FaceDetector.Face;

import android.os.IBinder;

import android.util.Log;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

public class CameraService extends Service implementsSurfaceHolder.Callback{

      //a variable to store a reference to the Surface View at the main.xml file

    private SurfaceView sv;

    boolean previewing = false;

    //a bitmap to display the captured image

     

      //Camera variables

      //a surface holder

      private SurfaceHolder sHolder; 

      //a variable to control the camera

      private Camera mCamera=null;

      //the camera parameters

      private Parameters parameters;

     

      /** Called when the activity is first created. */

    @Override

    public void onCreate()

    {

        super.onCreate();

        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();

        Log.d("No of cameras",Camera.getNumberOfCameras()+"");

        for (int camNo = 0; camNo < Camera.getNumberOfCameras(); camNo++) {

            CameraInfo camInfo = new CameraInfo();

            Camera.getCameraInfo(camNo, camInfo);

           

            if (camInfo.facing==(Camera.CameraInfo.CAMERA_FACING_FRONT)) {

                mCamera = Camera.open(camNo);

            }

        }

        if (mCamera == null) {

           // no front-facing camera, use the first back-facing camera instead.

           // you may instead wish to inform the user of an error here...

             mCamera = Camera.open();

        }

      

//        params.

            sv = new SurfaceView(getApplicationContext());

        Log.d("Entered","dfdf");

       

        //get the Surface View at the main.xml file

      

    }

   

    @Override

    public int onStartCommand(Intent intent, int flags, int startId) {

       Log.d("Entered onstart","dfdf");

       

//          Toast.makeText(getApplicationContext(), "wrking ", Toast.LENGTH_LONG).show();

       try {

           

                   

                   //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();

      

         //add the callback interface methods defined below as the Surface View callbacks

                

            

         //tells Android that this surface will have its data constantly replaced

         sHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);// TODOAuto-generated method stub

     

     

     

      return super.onStartCommand(intent, flags, startId);

    }

     

    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 = newFileOutputStream("/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;

      }

     

      public void surfaceChanged(SurfaceHolder holder, int format, intwidth,

                  int height) {

            if(previewing){

                  mCamera.stopPreview();

                  previewing = false;

            }

           

      }

      public void surfaceCreated(SurfaceHolder holder) {

            // TODO Auto-generated method stub

           

      }

     

      public void surfaceDestroyed(SurfaceHolder holder) {

            mCamera.stopPreview();

            mCamera.release();

            mCamera = null;

            previewing = false;

           

      }

     

      }