Question

我正在尝试在我的游戏中添加横幅广告，为此我需要我的libgdx游戏的父ViewGroup。我的代码是：

final Activity activity = (Activity) this;
final ViewGroup parent = (ViewGroup) ((ViewGroup) findViewById(android.R.id.content)).getChildAt(0); // exception here

然而，当我尝试使用以下错误时游戏崩溃：

java.lang.ClassCastException:
  com.badlogic.gdx.backends.android.surfaceview.GLSurfaceView20
    cannot be cast to android.view.ViewGroup

Answer 1

您的根布局为<metadata> <groupId>com.typesafe.play</groupId> <artifactId>filters-helpers_2.12</artifactId> <versioning> <latest>2.6.0-M2</latest> <release>2.6.0-M2</release> <versions> <version>2.6.0-M1</version> <version>2.6.0-M2</version> </versions> <lastUpdated>20170310220437</lastUpdated> </versioning> </metadata>，它是GLSurfaceView20的后代，后者是SurfaceView的后代，不是 a View。< / p>

如何获取libgdx游戏的父ViewGroup？

回答你的问题：父母可能是也可能不是ViewGroup（在你的情况下不是）。您可以获取内容ViewGroup并执行View测试，看看它是否是instanceof

的后代

Answer 2

试试这个，initializeForView方法返回View所以获取并添加到您自己的布局，最后通过setContentView方法将setContentView添加到布局。

public RelativeLayout layout;

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

        layout = new RelativeLayout(this);
        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
        layout.setLayoutParams(params);

        AndroidApplicationConfiguration config = new AndroidApplicationConfiguration();
        View gameView=initializeForView(new Main(), config);

        RelativeLayout.LayoutParams gameViewParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        gameViewParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
        gameViewParams.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
        gameView.setLayoutParams(gameViewParams);

        layout.addView(gameView);
        //create banner view and embed/add into layout 

        setContentView(layout);
}

如何获得libgdx游戏的父ViewGroup？

2 个答案: