getting context in java android

Question

hey i have an android application in which i monitor gmail server in a thread in background..this thread runs infinitely ...on getting a mail in the mailbox I have to make a toast..but i am not able to get the context of current activity(since there are multiple activities in the app)...how to get context of current running activity or may be application..getApplicationcontext gives null.

Answer 1

If you're running an Activity or a Service, both are Context themselves, so calling this suffice. On any callback method for a listener, this will refer to the listener, not to the Activity. You can refer to the Context using any View:

Context context = myView.getContext();  

Answer 2

In toasts and listeners and everywhere, if you need to get resources, You could use

Resources.getSystem().getString(android.R.string.cancel)

It has absolutely universal placement, but supports only system resources.