我無法解決的錯誤消息

Question

我收到此錯誤消息：在添加內容之前必須調用requestFeature（）。 我已經在stackowerflow上閱讀了有關此錯誤消息的其他問題，如果我理解正確的話，那就是不要在requestFeature（）之前調用setContentView（）。 但這不是我在onCreate方法中所做的嗎？ 還是該錯誤可能與其他原因有關？ 我很困惑，希望能提供一些幫助來解決此錯誤！ 謝謝！

    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);
}

編輯：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

請求窗口功能后必須設置方向。 您的陳述必須按以下順序

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

為此嘗試：

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);
}