Android注解约束参数为固定的某几个值

package com.z.z.bean;

import androidx.annotation.IntDef;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

import static com.z.z.bean.MustPosition.FIRST;
import static com.z.z.bean.MustPosition.SECOND;

@IntDef({FIRST, SECOND})
@Retention(RetentionPolicy.SOURCE)
public @interface MustPosition {

    public static final int FIRST = 0;
    public static final int SECOND = 1;

}

 注解被使用的位置:

   /*
     *  供外部调用,改变此view的被选中条目
     */
    public void setSlect(@MustPosition int posi) {

    }
原文地址:https://www.cnblogs.com/Oldz/p/13744357.html