如果用户仍在当前 Activity 中，我有一个需要显示的弹出窗口，几秒钟后。我实现了 stament 检查 Activity 是否未完成/销毁然后显示弹出窗口，它工作正常，周末用户 :)(从一个 Activity 慢慢点击到另一个 Activity )但在高压测试中( Activity 正在重新创建，完成，快速移动形式 Activity 到 Activity )给我那个错误:

E/UncaughtException: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running? at android.view.ViewRootImpl.setView(ViewRootImpl.java:598) at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:341) at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85) at android.widget.PopupWindow.invokePopup(PopupWindow.java:1279) at android.widget.PopupWindow.showAtLocation(PopupWindow.java:1040) at android.widget.PopupWindow.showAtLocation(PopupWindow.java:1003) at com.guides4art.app.ImageSlider.RatePopUp$3.run(RatePopUp.java:86) at android.os.Handler.handleCallback(Handler.java:743) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:150) at android.app.ActivityThread.main(ActivityThread.java:5546) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:684)

代码:

   private void showPopUpWindow(final Activity context){


       popupWindow = new PopupWindow(context);

       LinearLayout.LayoutParams layoutParams =new LinearLayout.LayoutParams(
               LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
       popupWindow.setHeight(layoutParams.height);
       popupWindow.setWidth(layoutParams.width);
       popupWindow.setOutsideTouchable(true);
       popupWindow.setTouchable(true);
       popupWindow.setFocusable(true);
       popupWindow.setContentView(view);


       ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
           @Override
           public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
               if(context instanceof CarSale) {
                   ((CarSale) context).saveRate((int) rating);
                    ((CarSale) context).initRate();
                   title.setText(""+context.getString(R.string.thanksForRate));
               }
               else
                   Log.i("kamil","error");
           }
       });
       closeButton.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View v) {
               popupWindow.dismiss();
           }
       });


if(!context.isFinishing() || !context.isDestroyed() )
               activityView.post(new Runnable() {
                   @Override
                   public void run() {
                       popupWindow.showAtLocation(context.getWindow().getDecorView(), Gravity.CENTER,0,0);
                   }
               });
   }


//View Pager Class

 @Override
    public void onPageSelected(int position) {
        if(viewPager !=null){
        this.position=position;
        if(position==carList.size()-1 && isRated() && showRateBar)
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                 new RatePopUp(Cars.this,activityView);
                    showRateBar=false;
                }
            },5*SECOND);

//RatePopUp constructor

 public RatePopUp(Activity context,View activityView){
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inflater.inflate(R.layout.rate_popup_layout, null);
        this.activityView=activityView;
        ratingBar = (RatingBar) view.findViewById(R.id.ratingPop);
        title= (TextView)view.findViewById(R.id.rateTitle);
        title.setText(context.getString(R.string.rate_exhibition));
        closeButton = (Button)view.findViewById(R.id.close_button);
        Typeface  typeface =Typeface.createFromAsset(context.getAssets(),"fonts/fontawesome-webfont.ttf");
        closeButton.setTypeface(typeface);
        closeButton.setText(context.getString(R.string.exitIcon));
        showPopUpWindow(context);
    }

最佳答案

试试这段代码:

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

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

}, 200L);

代替:

popupWindow.showAtLocation(context.getWindow().getDecorView(), Gravity.CENTER,0,0);

还要确保将 ActivityName.this 作为上下文传递.. 而不是 getApplicationContext()

尝试将 showPopUpWindow() 中的 runnable 代码替换为:

runOnUiThread(new Runnable() {
        @Override
        public void run() {
            if (!isFinishing()) {
                popupWindow.showAtLocation(context.getWindow().getDecorView(), Gravity.CENTER, 0, 0);
            }
        }
    });

关于android - activity.isFinishing 语句中的 BadTokenException : Unable to add window -- token null is not valid; is your activity running?，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41675828/