I solved my issue with help of this blog
So I capture the image within background service using this code:
@Override
public void onStart(Intent intent, int startId) {
mCamera = getAvailableFrontCamera(); // globally declared instance of camera
if (mCamera == null){
mCamera = Camera.open(); //Take rear facing camera only if no front camera available
}
SurfaceView sv = new SurfaceView(getApplicationContext());
SurfaceTexture surfaceTexture = new SurfaceTexture(10);
try {
mCamera.setPreviewTexture(surfaceTexture);
//mCamera.setPreviewDisplay(sv.getHolder());
parameters = mCamera.getParameters();
//set camera parameters
mCamera.setParameters(parameters);
//This boolean is used as app crashes while writing images to file if simultaneous calls are made to takePicture
if(safeToCapture) {
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)
{
safeToCapture = false;
//decode the data obtained by the camera into a Bitmap
FileOutputStream outStream = null;
try{
// create a File object for the parent directory
File myDirectory = new File(Environment.getExternalStorageDirectory()+"/Test");
// have the object build the directory structure, if needed.
myDirectory.mkdirs();
//SDF for getting current time for unique image name
SimpleDateFormat curTimeFormat = new SimpleDateFormat("ddMMyyyyhhmmss");
String curTime = curTimeFormat.format(new java.util.Date());
// create a File object for the output file
outStream = new FileOutputStream(myDirectory+"/user"+curTime+".jpg");
outStream.write(data);
outStream.close();
mCamera.release();
mCamera = null;
String strImagePath = Environment.getExternalStorageDirectory()+"/"+myDirectory.getName()+"/user"+curTime+".jpg";
sendEmailWithImage(strImagePath);
Log.d("CAMERA", "picture clicked - "+strImagePath);
} catch (FileNotFoundException e){
Log.d("CAMERA", e.getMessage());
} catch (IOException e){
Log.d("CAMERA", e.getMessage());
}
safeToCapture = true; //Set a boolean to true again after saving file.
}
};
private Camera getAvailableFrontCamera (){
int cameraCount = 0;
Camera cam = null;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();
for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
Camera.getCameraInfo(camIdx, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
try {
cam = Camera.open(camIdx);
} catch (RuntimeException e) {
Log.e("CAMERA", "Camera failed to open: " + e.getLocalizedMessage());
}
}
}
return cam;
}
//Send Email using javamail API as user will not be allowed to choose available
// application using a Chooser dialog for intent.
public void sendEmailWithImage(String imageFile){
.
.
.
}
Following uses-features and permissions will be needed for this in manifest file:
<uses-feature
android:name="android.hardware.camera"
android:required="false" />
<uses-feature
android:name="android.hardware.camera.front"
android:required="false" />
<uses-permission android:name="android.permission.SEND_MAIL" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
I have set property required to false, so that user will be able to install my app even without any of the Camera available. May be this can help someone in future.
