java.lang.RuntimeException: An error occured while executing doInBackground()

Question

Sometimes i get this crash error in my app

java.lang.RuntimeException: An error occured while executing doInBackground()

This is the full l

Answer 1

You can't do any GUI work on a background thread. Instead you should post a Runnable to a handler created in the GUI thread to make your Toast execute on the correct thread.

EDIT: Since the homework tag was removed, I'll give an outline how to do it;

• new() up a Handler in your GUI thread (onCreate is a good place) and save it in a member variable, say "handler".
• Move showing your Toast to a Runnable (anonymous class is pretty good for this)
• To show the toast, do a handler.post() with your Runnable as a parameter. The Runnable will execute in the GUI thread.

For a complete example, see this article.