PopupWindow $ BadTokenException：无法添加窗口-令牌null无效

显示PopupWindow时出现以下错误。错误是由以下行触发的：

checkInPopup.showAtLocation((ViewGroup) mapView.getParent(), Gravity.CENTER_HORIZONTAL, 0, 0);

mapView是一个MapView，没有任何内容为null。堆栈跟踪：

01-08 18:00:09.402: E/AndroidRuntime(27768): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.view.ViewRootImpl.setView(ViewRootImpl.java:513)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:301)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.view.Window$LocalWindowManager.addView(Window.java:537)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.widget.PopupWindow.invokePopup(PopupWindow.java:988)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.widget.PopupWindow.showAtLocation(PopupWindow.java:845)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.widget.PopupWindow.showAtLocation(PopupWindow.java:809)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at com.geoloc.ActivityCheckIn.onCreate(ActivityCheckIn.java:50)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.app.Activity.performCreate(Activity.java:4465)
01-08 18:00:09.402: E/AndroidRuntime(27768):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)

这是我的活动中的代码（扩展了MapActivity）

    protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.checkin);
    mapView = (MapView) findViewById(R.id.mapview);

    LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    checkInPopup = new PopupWindow(inflater.inflate(CHECK_IN_POPUP_LAYOUT, null, false));
    checkInPopup.setOutsideTouchable(true);
    checkInPopup.setHeight(100);
    checkInPopup.setWidth(200);
    checkInPopup.showAtLocation((ViewGroup) mapView.getParent(), Gravity.CENTER_HORIZONTAL, 0, 0);
}

感谢您分享您的想法

您显示弹出窗口为时过早。您可以在Onresume中发布showatlocation的延迟运行项，尝试一下

编辑： 这篇文章似乎有相同的问题，回答了在Android活动中创建弹出窗口的问题

当我尝试在活动中显示弹出菜单时，我也遇到了同样的问题，但我也遇到了同样的问题，但是我遇到了问题n通过提供上下文来解决

YourActivityName.this 而不是getApplicationContext()在

Dialog dialog = new Dialog(getApplicationContext());

是的，它为我工作可能会帮助别人

使用：

YourActivityName.this

代替：

getApplicationContext();

在两种情况下可能会发生此异常。nandeesh提到了一个。这里提到了其他场景：http : //blackriver.to/2012/08/android-annoying-exception-unable-to-add-window-is-your-activity-running/

确保您都处理

  @Override
protected void onCreate(Bundle savedInstanceState) {
    View view = LayoutInflater.from(mContext).inflate(R.layout.popup_window_layout, new LinearLayout(mContext), true);
    popupWindow = new PopupWindow(view, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    popupWindow.setContentView(view);
}

   @Override
public void onWindowFocusChanged(boolean hasFocus) {
    if (hasFocus) {
        popupWindow.showAtLocation(parentView, Gravity.BOTTOM, 0, 0);
    }
}

正确的方法是onWindowFocusChanged（）的popupwindow.show（）。

弹出窗口的父项本身不能成为弹出窗口。他们的父母必须相同。因此，如果在弹出窗口内创建弹出窗口，则必须保存父窗口的弹出窗口并使其成为父窗口。

这是一个例子

尝试显示如下所示的流行音乐

findViewById(R.id.main_layout).post(new Runnable() {
        public void run() {
            mPopupWindow.showAtLocation(findViewById(R.id.main_layout), Gravity.CENTER, 0, 0);
            Button close = (Button) customView.findViewById(R.id.btn_ok);
            close.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mPopupWindow.dismiss();
                    doOtherStuff();
                }
            });
        }
    });

演出前使用此方法

public static ViewGroup getActivityFirstLayout(Context ctx)
{
    return (ViewGroup)((ViewGroup) ActivityMaster.getActivity(ctx).findViewById(android.R.id.content)).getChildAt(0);
}

private boolean activityIsOk(Activity activity)
{
    boolean s1 = !(activity == null || activity.isFinishing());

    if(s1)
    {
        View v = LayoutMaster.getActivityFirstLayout(activity);
        return v.isShown() && ViewCompat.isLaidOut(v);
    }

    return false;
}

尝试使用它

LayoutInflater inflater = (LayoutInflater).getApplicationContext().getSystemService(LAYOUT_INFLATER_SERVICE);
View view = inflate.from(YourActivity.this).inflate(R.layout.yourLayout, null);

经过数小时的搜索和测试，我发现以下解决方案（通过实施不同的SO解决方案）在任何情况下都没有失败，甚至崩溃了。

     Runnable runnable = new Runnable() {
            @Override
            public void run() {

          //displayPopup,progress dialog or what ever action. example

                ProgressDialogBox.setProgressBar(Constants.LOADING,youractivityName.this);
            }};

logcat指示崩溃正在发生的地方。在我的情况下，在接收广播时开始运行。

runOnUiThread(new Runnable() {
            @Override
            public void run() {
                if(!isFinishing()) {
                    new Handler().postAtTime(runnable,2000);
                }
            }
        });

尝试显示这样的弹出窗口

new Handler().postDelayed(new Runnable(){

    public void run() {
       popupWindow.showAtLocation(context.getWindow().getDecorView(), Gravity.CENTER,0,0);
    }

}, 200L);