get the default preferences in Android

Getting default preferences

// to get the default preferences for an application assuming your preferences file is in
// res/xml/posit_preferences
        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
        Log.i(TAG, sp.getString("APP_KEY", "test"));

gistfile2.txt

//Put this in the starting activity to declare the default values. 
PreferenceManager.setDefaultValues(this, R.xml.posit_preferences, false);

gistfile3.txt

//to edit the values from other application.
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = settings.edit();
editor.putString("APP_KEY", map.get("app_key").toString());
editor.commit();