Answers for "how to shared preference enabled in android"

get preference value android

boolean mBoolean = PreferenceManager.getDefaultSharedPreferences(yourContext).getBoolean(key, defaultValue); //getBoolean will return defaultValue is key isn't found
//you can also use getInt, getFloat, getLong, getString, getStringSet and change the variable type, of course

save integer android studio

SharedPreferences.Editor mEditor = mPrefs.edit();
mEditor.putString("tag", value_of_variable).commit();