activity onPause how to save the interface data

Question

Hello I have in my app 2 activities and I want that when I switch between them the user interface and the Variables wont change is there any way to do it.

Thanks for the help

Answer 1

If you want to save primitive data type (string,int,boolean etc.. ) use SharedPreferences, that will save your values permanently, untill user reinstall (clear data) application. Shared Preferences works like this

// save string in sharedPreferences
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
                    SharedPreferences.Editor editor = settings.edit();
                    editor.putString("some_key", string); // here string is the value you want to save
                    editor.commit(); 

// restore string in sharedPreferences

SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
string = settings.getString("some_key", "");