Find the Window containing a View in Android

Question

I can't find a way to obtain a reference the Window containing an arbitrary View v. I found getWindowToken, but I can't figure out how to use it? Does anyone know how?

Also, does anyone know why it returns an IBinder rather than a Window?

Answer 1

Well... since all views have a reference of the activity that created them (Context), you can use that Context to get a reference of the window. Let me show you this example I wrote some minutes ago:

// main activity import android.app.Activity; import android.os.Bundle; public class GetWindow extends Activity {     /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         MyView view = new MyView(this);         view.changeSomethingInWindow(); // keep an eye on this method         setContentView(view);     } } 

Then, inside your view you can do this:

// your view :D import android.app.Activity; import android.content.Context; import android.view.View; import android.view.Window; import android.view.WindowManager;  public class MyView extends View{     public MyView(Context context) {         super(context);     }      @Nullable     private Activity getActivity() {         if (context == null) return null;         if (context instanceof Activity) return (Activity) context;         if (context instanceof ContextWrapper) return getActivity(((ContextWrapper)context).getBaseContext());         return null;     }       public void changeSomethingInWindow(){         // get a reference of the activity         Activity parent = getActivity();         if(parent == null) return;         // using the activity, get Window reference         Window window = parent.getWindow();         // using the reference of the window, do whatever you want :D         window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,             WindowManager.LayoutParams.FLAG_FULLSCREEN);     } } 

In this case, I change the mode the Window is displayed to Fullscreen. Hope this help you. Tell me if you get in trouble with this.