popupWindow异常

 

Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?

 

    

是PopupWindow组件的使用问题,如果你直接在Activity创建的方法中初始化，则会有此错误

因此总结：PopupWindow必须在某个事件中显示或者是开启一个新线程去调用，不能直在oncreate方法中显示一个PopupWindow，否则永远会有以上错误

实践:
mListView.post(new showProgressViewRunnable());

 private class showProgressViewRunnable implements Runnable {

		@Override
		public void run() {
			if(isRunProgressBar){
				isRunProgressBar = false;
			    showProgressBar();
			}
		}
	}