CODEWITHSUNDEEP
android
brianmearns
brianmearns

Reputation: 9967

Save and restore fragment when activity is popped from back stack

How can I save a Fragment's state when a user presses the back button, and then restore it the next time I load the fragment? I tried onSaveInstanceState, but it doesn't get called when I hit back, and the Bundle passed into onCreate is null.

For context, I have a title Activity which starts a new game Activity when the user presses a button (e.g., "New game"). The second (game) activity loads an XML layout in onCreate which consists of the custom Fragment. When the user presses the back button, I want to return to the title Activity, but provide a "resume game" button. To do so, I need to save some custom state data for the Fragment.

Upvotes: 1

Views: 1105

Answers (1)

Johnny Doe
Johnny Doe

Reputation: 3330

By default onSaveInstanceState() call doesn't occur when user press Back

If the user presses the Back button, the current activity is popped from the stack and >destroyed. The previous activity in the stack is resumed. When an activity is destroyed, the >system does not retain the activity's state.

So the way you can do it seems to be: (1) Override activity's onBackPressed() with your own implementation where you (2) Save fragment instance. Take a look at the FragmentManager.saveFragmentInstanceState() - i believe that this is what you need

Upvotes: 1

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