通过下面的代码获取AppOpsManager MODE

private static int checkOp(Context context, int op){
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT){
            Object object = context.getSystemService(Context.APP_OPS_SERVICE);
            Class c = object.getClass();
            try {
                Class[] cArg = new Class[3];
                cArg[0] = int.class;
                cArg[1] = int.class;
                cArg[2] = String.class;
                Method lMethod = c.getDeclaredMethod("checkOp", cArg);
                return (Integer) lMethod.invoke(object, op, Binder.getCallingUid(), context.getPackageName());
            } catch(NoSuchMethodException e) {
                e.printStackTrace();
                LogUtils.e("permission:: NoSuchMethodException"+e.getMessage());
            } catch (IllegalAccessException e) {
                e.printStackTrace();
                LogUtils.e("permission:: IllegalAccessException"+e.getMessage());
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
                LogUtils.e("permission:: IllegalArgumentException"+e.getMessage());
            } catch (InvocationTargetException e) {
                e.printStackTrace();
                LogUtils.e("permission:: InvocationTargetException"+e.getMessage());
            }
        }
        return -1;
    }

测试流程：

每次通过设置界面修改 app 拨打电话权限，查看打印的值

测试结果(都是6.0以下的系统)：

1. 小米 ，锤子手机正常

2. 魅族MX5、OPPO R9S 不管怎么切换权限返回值都为0

请问各位如何拿到当前的权限状态？