CODEWITHSUNDEEP
androidandroid-activitybroadcastreceiver
ionicom
ionicom

Reputation: 163

Resume activity from broadcast receiver

I'm trying to resume an activity from within a broadcast receiver's onReceive() method as follows:

Intent i = new Intent(context, TimerSet.class);
i.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);

However the activity (TimerSet.class) is recreated instead of resumed. The only recommended solution I found to this problem was to use the FLAG_ACTIVITY_REORDER_TO_FRONT but I'm already using it.

Also, using Intent.FLAG_ACTIVITY_NEW_TASK doesn't fit my use case but I get the following exception when I do not provide it:

android:util.AndroidRuntimeException: Calling startActivity() from outside of an 
Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you 
want?

Upvotes: 2

Views: 2356

Answers (2)

DaiLak
DaiLak

Reputation: 746

I am not sure whether this is exactly your problem or not, but I have a situation where I got a notification and I want to start my app without starting a new instance (if it's already running) I finally figured out that these will work. The FLAG_ACTIVITY_NEW_TASK will not start a new instant if the activity has already been running. However, it will add it to the existing stack. Therefore, we can do a FLAG_ACTIVITY_CLEAR_TOP, so back will bring user to the home screen but not the previous state.

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);

Upvotes: 4

Fahad Ishaque
Fahad Ishaque

Reputation: 1926

remove FLAG_ACTIVITY_NEW_TASK flag. also add this flag ->FLAG_ACTIVITY_CLEAR_TOP. This would prevent new activity to be created if already present.

Upvotes: 1

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