android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid...

问题描述：当调用AlertDialog、ProgressDialog等Dialog show时，报出异常android.view.WindowManager$BadTokenExceptionUnable to add window -- token null is not valid; is your activity running?示例代码：new AlertDialog.Builder(g

wowo_emperor

1790人浏览 · 2022-01-13 17:12:02

wowo_emperor · 2022-01-13 17:12:02 发布

问题描述：当调用AlertDialog、ProgressDialog等Dialog show时，报出异常

android.view.WindowManager$BadTokenException

Unable to add window -- token null is not valid; is your activity running?

示例代码：

new AlertDialog.Builder(getApplicationContext())  //不能用getApplicationContext()
            .setIcon(android.R.drawable.ic_dialog_alert)  
            .setTitle("Warnning")  
            .setPositiveButton("Yes", positiveListener)
            .setNegativeButton(  "No", negativeListener)
            .create().show();

解决方式：Builder时参数传入 XXX(Activity).class