多进程Preferences数据共享

public static void putStringProcess(Context ctx, String key, String value) {
    SharedPreferences sharedPreferences = ctx.getSharedPreferences("preference_mu", Context.MODE_MULTI_PROCESS);
    Editor editor = sharedPreferences.edit();
    editor.putString(key, value);
    editor.commit();
}

public static String getStringProcess(Context ctx, String key, String defValue) {
    SharedPreferences sharedPreferences = ctx.getSharedPreferences("preference_mu", Context.MODE_MULTI_PROCESS);
    return sharedPreferences.getString(key, defValue);
}