Check whether activity is active

Question

I\'m having a problem with a listener in a certain activity.

The problem is that this listener contains an alert.show(); which can be called after we try to push a

Answer 1

For API level >= 23 you can use 'lifecycle' property of activity to detect the state of activity. This gives a very compact code. Here is an example code in Kotlin, as class extension:

fun FragmentActivity.isRunning() = lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED)

// ...
// Here 'myActivity' can be inherited from different activity-like classes, 
// for example, from class AppCompatActivity:
if (myActivity.isRunning()) {
    Log.d("log", "Activity is running!")
}