[Android] bug "is your activity running ?"

17:39:41 09-20. 196: E/androidruntime (32388): Android. view. windowmanager $ badtokenexception: unable to add window -- token android. OS. binderproxy @ 45907880 is not valid; is your activity running?

This bug may be caused by many situations. The main reason for my analysis is that an activity that has been finished is executed based on this activity.

1) one of the situations I encountered is:

My activity has a handler that receives messages sent from the server. When the activity is Finnish, the message arrives, causing this bug.

My solutions:

Override the dispatchmessage method of handler:

@ Overridepublic void dispatchmessage (Message MSG) {If (! Isactivityfinished) Super. dispatchmessage (MSG );}

If the activity has been completed, do not resend the message.

 

There should be other causes for this bug, and then add it.