[Android] Activity fullscreen darstellen

package com.example.Hello;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        setFullScreen(this);

        setContentView(R.layout.main);
    }

    protected void setFullScreen(Context ctx)
    {
        ((Activity) ctx).requestWindowFeature(Window.FEATURE_NO_TITLE);
        ((Activity) ctx).getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }
}