我无法解决的错误消息

Question

I'm getting this error message: requestFeature() must be called before adding content. I have read other questions about this error message here at stackowerflow, and if I understand it correct, it's all about don't call setContentView() before requestFeature(). But isn't this what I have done in my onCreate method? Or could the error have to do with something else? I'm confused and would preciate some help to solve this error! Thanks!

    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.activity_main);

    // Set screen to landscape
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    // Remove title from screen
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    // Set screen to full screen
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

    // Create a new object of GameLoop and pass this context
    gameLoop = new GameLoop(this);
    gameLoop.setOnTouchListener(this);
    setContentView(gameLoop);
}

EDIT: The LogCat

04-25 08:19:07.937: I/ApplicationPackageManager(6365): cscCountry is not German : NEE
04-25 08:19:08.085: W/dalvikvm(6365): threadid=9: thread exiting with uncaught exception (group=0x40018578)
04-25 08:19:08.101: E/AndroidRuntime(6365): FATAL EXCEPTION: Thread-10
04-25 08:19:08.101: E/AndroidRuntime(6365): java.lang.NullPointerException
04-25 08:19:08.101: E/AndroidRuntime(6365):     at  com.android.mergemania.GameLoop.drawObjects(GameLoop.java:78)
04-25 08:19:08.101: E/AndroidRuntime(6365):     at  com.android.mergemania.GameLoop.run(GameLoop.java:63)
04-25 08:19:08.101: E/AndroidRuntime(6365):     at java.lang.Thread.run(Thread.java:1019)

Answer 1

You must set the orientation after requesting window feature. your statements must be in the below order

protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    // Remove title from screen
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    // Set screen to full screen
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

    // Set screen to landscape
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

    // Create a new object of GameLoop and pass this context
    gameLoop = new GameLoop(this);
    gameLoop.setOnTouchListener(this);
    setContentView(gameLoop);
}

Answer 2

try for this:

protected void onCreate(Bundle savedInstanceState) {

requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.activity_main);

    // Set screen to landscape
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    // Remove title from screen

    // Set screen to full screen
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

    // Create a new object of GameLoop and pass this context
    gameLoop = new GameLoop(this);
    gameLoop.setOnTouchListener(this);
    setContentView(gameLoop);
}