有没有一种方法来检查android WindowManager是否已经包含一个视图?

问题描述

当我尝试执行WindowManager.removeView()时，

When I try to do a WindowManager.removeView(),

E/AndroidRuntime( 2445): java.lang.IllegalArgumentException: View=android.widget.LinearLayout{41a03700 V.E..... ......I. 0,0-0,0} not attached to window manager

E/AndroidRuntime( 2445):             at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:370)

E/AndroidRuntime( 2445):             at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:299)

E/AndroidRuntime( 2445):             at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:79)

我收到此致命错误，因为视图不在窗口管理器中.有没有办法检查windowmanager之前是否已经添加过视图?我在源

I get this fatal error because the view was not in the window manager.Is there no way to check if windowmanager had already added the view before?I do not see any such method in the source

推荐答案

您可以检查视图的窗口标记是否为空:

You can check to see if the view's window token is null:

if(view.getWindowToken() != null){
    WindowManager.removeView(view);
}

您也可以捕获异常:

try{
    WindowManager.removeView(view);
}catch(IllegalArgumentException e){
    Log.e(debug_tag, "view not found");
}

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