How to force "org.opencv.android.JavaCameraView" preview to be full screen

Hi, I am trying to set org.opencv.android.JavaCameraView to be full screen, but its not working, This is main xml: This is the manifest: The main activity: public class MainActivity extends Activity implements CvCameraViewListener2{ private static final String TAG = "OCVSample::Activity"; // Loads camera view of OpenCV for us to use. This lets us see using OpenCV private CameraBridgeViewBase mOpenCvCameraView; // Used in Camera selection from menu (when implemented) private boolean mIsJavaCamera = true; private MenuItem mItemSwitchCamera = null; // These variables are used (at the moment) to fix camera orientation from 270degree to 0degree Mat mRgba; Mat mRgbaF; Mat mRgbaT; private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) { @Override public void onManagerConnected(int status) { switch (status) { case LoaderCallbackInterface.SUCCESS: { Log.i(TAG, "OpenCV loaded successfully"); mOpenCvCameraView.enableView(); } break; default: { super.onManagerConnected(status); } break; } } }; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); setContentView(R.layout.activity_main); //getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); setContentView(R.layout.content_main); mOpenCvCameraView = (JavaCameraView) findViewById(R.id.tutorial1_activity_java_surface_view); mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE); mOpenCvCameraView.setCvCameraViewListener(this); } @Override public void onPause() { super.onPause(); if (mOpenCvCameraView != null) mOpenCvCameraView.disableView(); } @Override public void onResume() { super.onResume(); if (!OpenCVLoader.initDebug()) { Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization"); OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_11, this, mLoaderCallback); } else { Log.d(TAG, "OpenCV library found inside package. Using it!"); mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS); } } public void onDestroy() { super.onDestroy(); if (mOpenCvCameraView != null) mOpenCvCameraView.disableView(); } public void onCameraViewStarted(int width, int height) { mRgba = new Mat(height, width, CvType.CV_8UC4); mRgbaF = new Mat(height, width, CvType.CV_8UC4); mRgbaT = new Mat(width, width, CvType.CV_8UC4); } public void onCameraViewStopped() { mRgba.release(); } public Mat onCameraFrame(CvCameraViewFrame inputFrame) { // TODO Auto-generated method stub mRgba = inputFrame.gray(); // Rotate mRgba 90 degrees Core.transpose(mRgba, mRgbaT); Imgproc.resize(mRgbaT, mRgbaF, mRgbaF.size(), 0, 0, 0); Core.flip(mRgbaF, mRgba, 1); return mRgba; // This function must return } } Thanks in advance!