Android SharedPreferences String Set - some items are removed after app restart

Question

I save a string set in the shared preferences, if I read it out it\'s ok. I start other activities, go back and read it again, it\'s ok. If I close the application, and start it

Answer 1

To save string in sharedprefernces

   SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(this).edit();
   editor.putString("text", mSaved.getText().toString());
   editor.commit();

To retrieve data from shared preference

 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
 String restoredText = prefs.getString("text", null);