got trouble to find onResume method in activity file.

I'll be honest with you; that's a fairly weak description of your problem. If you were to describe a little more, people could figure out what you're having an issue with. That said, if your file doesn't have an onResume, it either 1) doesn't need one (yet) 2) shouldn't have one. If the option is number 1, then consider this: If a class file doesn't have a method, then it is typical that the superclass (the 'parent') will take responsibility of that action or method. Now, if you 'need' an 'onResume' method in your class (maybe someone is telling you 'put this in your onResume' and there isn't one) then you just need to add it. ///////////////////////////////////////////////////// @Override public void onResume() { super.onResume(); BT_debugger.showIt(activityName + ":onResume"); // put whatever code you need to here } ///////////////////////////////////////////////////// Cheers! -- Smug With certain limitations, you can always 'borrow' a method from another BT class file and use it in your class, as long as you remove any 'specific' code that doesn't apply in your class.