问题
I'm looking for a way to store the state of my variables that may have been changed from there initiation variable (ever by user activating a function or other) through the onDestroy() event so that if i turn my phone on and off my app hasn't reset the variables.
回答1:
First of all, this is from android reference: "Note: do not count on onDestroy method being called as a place for saving data! For example, if an activity is editing data in a content provider, those edits should be committed in either onPause() or onSaveInstanceState(Bundle)"
For saving variables you can use as said before SharedPreferences.
Example for using inside activity class:
SharedPreferences prefs = getSharedPreferences("preference_file_name", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putString("variable_key", variable);
editor.commit();
For method onSaveInstanceState(Bundle) just use Bungle argument to save variables
回答2:
Look at the SharedPreferences feature. It is designed just for this case.
Good sites to read are here, this and this. And look at this question.
来源：https://stackoverflow.com/questions/13088981/storing-variables-through-ondestroy-event