如何获取Android系统时间是24小时制还是12小时制

直接上源码：

        ContentResolver cv = this.getContentResolver();
        String strTimeFormat = android.provider.Settings.System.getString(cv,
                                           android.provider.Settings.System.TIME_12_24);
       
        if(strTimeFormat.equals("24"))

       {
              Log.i("activity","24");
        }