单个活动实例 [英] Single Instance of Activity

问题描述

My application has three activities say A -> B-> C.

Activity A is called from another activity through startActivityForResult(). Activity B and C are also called similarly. I have to call activity A from notifications bar also (if there is some specific notification).

Now, if currently I am in activity B or C, and I click on Notification bar, and call the activity A, the app goes to Activity A only and data entered through activites B or C do not persist.

I don't want such behavior. I want that if I click on Notification, it should redirect to current screen only. Can some one help. (I mentioned activity:launchMode as SingleTask).

解决方案

You may be able to use a static variable to determine other data. I am not sure how much or what type of data you are looking to access from the other Activities, though.

Also writing to persistent storage may work, but again - the vagueness of what data you are storing and how makes it difficult to answer. Just write/read the persistent storage in the onResume and onSuspend methdod of each Activity (or create super Activity class and extend it for A, B and C.

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