My main activity A
has as set android:launchMode="singleTask"
in the manifest. Now, whenever I start another activity from there, e.g. B
and press the HOME BUTTON
on the phone to return to the home screen and then again go back to my app, either via pressing the app's button or pressing the HOME BUTTON
long to show my most recent apps it doesn't preserve my activity stack and returns straight to A
instead of the expected activity B
.
Here the two behaviors:
Expected: A > B > HOME > B
Actual: A > B > HOME > A (bad!)
Is there a setting I'm missing or is this a bug? If the latter, is there a workaround for this until the bug is fixed?
FYI: This question has already been discussed here. However, it doesn't seem that there is any real solution to this, yet.
This is not a bug. When an existing singleTask
activity is launched, all other activities above it in the stack will be destroyed.
When you press HOME
and launch the activity again, ActivityManger
calls an intent
{act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER]flag=FLAG_ACTIVITY_NEW_TASK|FLAG_ACTIVITY_RESET_IF_NEEDED cmp=A}
So the result is A > B > HOME > A.
It's different when A's launchMode is "Standard". The task which contains A will come to the foreground and keep the state the same as before.
You can create a "Standard" activity eg. C as the launcher and startActivity(A) in the onCreate method of C
OR
Just remove the launchMode="singleTask"
and set FLAG_ACTIVITY_CLEAR_TOP|FLAG_ACTIVITY_SINGLE_TOP
flag whenever call an intent to A