The Intent constructors parameters

Question

The Intent class had 6 constructors

Intent()

Create an empty intent.

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Inten

Answer 1

Take a look at the argument Context very closely in the fifth Intent declaration. It reflects polymorphism. The Intent takes a Context argument so you can pass any object that is a Context or derives from the Context class.

Activity, AppCompatActivity, IntentService, Service all derive from the Context class and hence can be passed as an argument to the method.

Answer 2

Activity extends Context so you can just cast it:

Intent i = new Intent((Context)getActivity(), DestinationActivity.class);

Answer 3

Activity inherits context. Thus, if you are in an activity, you only need to pass itself to use the context. It also contains a pointer to getBaseContext(). You might occasionally need to reference that, if you need the entire application context, but most likely you won't for a while.

You can find more details about the Activity class here.

This question about the intent constructor parameters is similar to yours and has a really good answer. I think you'd like to check it out.

Hope it helps.