get values from SharedPreference in java code example

Example 1: 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

Example 2: refresh sharedpreferences going back java

getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);