Android – How do I get sharedpreferences from another activity?

Use the following functions to add shared preferences and to fetch the saved values from all activities.

public static void setDefaults(String key, String value, Context context) {
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
    SharedPreferences.Editor editor = preferences.edit();
    editor.putString(key, value);
    editor.apply(); // or editor.commit() in case you want to write data instantly
}

public static String getDefaults(String key, Context context) {
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
    return preferences.getString(key, null);
}