Relationship between android:noHistory and android:finishOnTaskLaunch

Question

How do these two attributes relate? If I have android:noHistory="true", does having android:finishOnTaskLaunch="true" have any significance/meaning?

Answer 1

Let's say you have three activities in your app: A, B, and C. You start your app and see A, click a button and see B, click a button and see C.

First scenario

Now if you press the Back button on your phone, you will see B.

Second scenario

Let's say that B has android:noHistory="true". Now if you press the Back button on your phone, you will see A. The android:noHistory="true" attribute removed B from the history (i.e. the activity stack), so you will not see it when you hit the Back button.

Third scenario

Let's say that C has android:finishOnTaskLaunch="true". Now if you press the Home button on your phone and then launch the app again, you will see B. Android ended C when you launched the app again because it has the android:finishOnTaskLaunch="true" attribute.

Answer 2

finishOnTaskLaunch would kill the Activity as you move to another task. But noHistory would kill the Activity if you move to another activity in the same task.