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

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Hi,

I am trying to set org.opencv.android.JavaCameraView to be full screen, but its not working,

This is main xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
xmlns:opencv="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.benzy.image.MainActivity"
tools:showIn="@layout/activity_main"
android:id="@+id/camera_preview">

<org.opencv.android.JavaCameraView
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:visibility="gone"
    android:id="@+id/tutorial1_activity_java_surface_view"
    opencv:show_fps="true"
    opencv:camera_id="any" />

</RelativeLayout>

This is the manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.benzy.image">

<!--<uses-sdk
     android:minSdkVersion="10"
     android:targetSdkVersion="19" />-->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="18"/>

<!--<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />-->
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<!--<uses-feature android:name="android.hardware.camera.front" android:required="false" />-->


<supports-screens android:resizeable="true"
    android:smallScreens="true"
    android:normalScreens="true"
    android:largeScreens="true"
    android:anyDensity="true" />


<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">





        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</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 ...