无法添加窗口令牌android.os.BinderProxy@4250d6d8无效; 你的活动在运行吗？

Question

一位用户昨天向我发送了这份崩溃报告:

 android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@4250d6d8 is not valid; is your activity running?
    at android.view.ViewRootImpl.setView(ViewRootImpl.java:698)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:326)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
    at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
    at android.view.Window$LocalWindowManager.addView(Window.java:552)
    at android.app.Dialog.show(Dialog.java:277)
    at android.app.AlertDialog$Builder.show(AlertDialog.java:932)
    at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:833)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4867)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
    at dalvik.system.NativeStart.main(Native Method)

所以我搜索了,据说解决方案是this改为Activity.this 但是即使我使用以下代码,这个解决方案也没有用:

//Oncreate Method.....

     button.setOnClickListener(new OnClickListener(){

                        @Override
                        public void onClick(View v) {

         AlertDialog.Builder alertd = new AlertDialog.Builder(MainActivity.this);

         alertd.setMessage("StackOverflow");

         alertd.setTitle("Example");

         AlertDialog alertd2 = alertd.create();

         alertd2.show();
        }

                      });

我应该改变什么吗？

Answer 1

最后,我找到了解决方案.问题是,尽管您的活动已完成,但您的提醒会尝试显示.

所以你应该做的是在显示警报之前检查活动是否完成.为此, isFinishing() 方法在Activity类中定义.

这是你要做的:

 if(!isFinishing())
 {
     alert.show();
 }

玩得开心.