恢复时强制重新创建活动/片段

Question

I am having a number of issues around saving app state to a Bundle via onSaveInstanceState().

For now, I need to address the issue of my app crashing when it restored after being closed by Android.

When an Activity/Fragment (in background) is being force closed by Android to regain resources, is there a way I can say "don't try and restore state when resume, just create everything anew"?

Thanks

Answer 1

In the "onCreate" method f the activity, you can pass a null value to the super call

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(null);
    //rest of your code
}

Answer 2

I recommend to you save your data in onPause() method. Whe you close app with HOME button onSaveInstanceState never have been called and data will be lost.

is there a way I can say "don't try and restore state when resume, just create everything anew"?

Yes. You can. You can check window state of app and manipulate your logic with boolean flags. Also i will recommend to you slice save\\restore data process into 2 separate ways :

• Prepare Data to save \\ restore
• Save \\ Restore

Answer 3

For activity if you want to create it from scratch then just override onSaveInstanceState and call super.onSaveinstanceState passing a null al the Bundle.

For Fragment just set setRetainInstanceState to false in onActivityCreated method of the Fragment.