Difference between implicit and explicit intents [duplicate]

Answer 1

Implicit activity call

With an intent filter you create action for your activity so other apps can call your activity via an action:

.

Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.example.com"));
startActivity(intent);

Explicit activity call

You make a call that indicates exactly which activity class to use:

Intent intent = new Intent(this, ActivityABC.class);
startActivity(intent);

Here's an additional reference