Java. Lang. runtimeexception: can't create handler inside thread that has not called logoff. PR

Today, we have an appwidget. To determine the WiFi and Bluetooth statuses, it takes some time to change the process status. Therefore, we need to open a thread to determine and then update the interface.

A thread is opened directly to call the UPDATE function in the thread. Unfortunately, an error is prompted when you click Add appwidget for the first time.

Java. Lang. runtimeexception: can't create handler inside thread that has not called logoff. Prepare ()

Then handler is used to solve the problem. You can also do this in the appwidget, which is too convenient.