Save and restore Android activity state

In Andoird development, you can save and restore an activity state with SharedPreferences. Here is sample:

In your activity's class: Override 2 methods:
- void onCreate(Bundle savedInstanceState);
- void onPause();

Then, modify your override methods to install your Save/Restore function:
- Create some global variable
- Save in onPause() method
- Restore in onCreate() method

Modification override method

Now try your modification.

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