How to stop an activity started with implicit intent (Intent.ACTION_DIAL etc) from a service

Question

I would like to stop an activity started with implicit intent(using Intent.ACTIN_CALL etc). Is there a way to do this? Also when we use "startActivity()" function of Context(abstract class), how does it actually start it? Thanks.

Answer 1

No, you cannot stop an activity.

To answer your second question, when you call startActivity() the Intent that you pass as a parameter is given to the Android framework. The framework performs the appropriate Intent resolution using the contents of the Intent to determine which activity to actually start. Then, depending on the activity that needs to be started, it may need to create a new OS process, instantiate the Application object for that application and finally instantiate the activity object and call onCreate() on it. However, there are other things that may or may not happen during this process, depending on the state of the task that contains the activity, the Intent flags used, the launchMode of the activity as defined in the manifest, etc.