java - 参数列表上的注解可以同时有多个吗?

Question

我有一个方法，在参数列表上有一个参数（接受一个颜色类型），数据类型是int型

但是我的方法内部，这个int型根据传入的一个boolean类型做了判断，
所以它

 * 既可以是`@ColorRes` （颜色代码的资源ID，int类型）
 * 也可以是`@ColorInt`  (颜色代码在Color类中的成员变量，int类型）
 

但是方法参数上又不能写（@ColorRes|@ColorInt） 同样的参数列表也不能用方法重载来搞定。
所以就想问一下有没有办法可以让两个注解同时生效的？

Answer 1

Multi-annotation code is as follows:

public void setColor(@ColorInt @ColorRes int color){
    // TODO 
}

There is a problem with writing this way. For IDEs, this is ambiguous. If you want a Color value and a Color resource reference, will there be such an Int value?
This type of annotation itself is only for IDE assistance. , that is, problems are discovered during compilation. You can disable this type of Lint by opening Inspections, as shown below:

Why not refer to the Android source code instead of defining a method that makes the caller crazy? The source code is as follows:

public void setBackgroundColor(@ColorInt int color) {
    ...
}

public void setBackgroundResource(@DrawableRes int resid) {
    ...
}