如何交互ArrayList <Class <？扩展IMyInterface >>

Question

我有一个ArrayList<Class<? extends IMyInterface>> classes = new ArrayList<>();.当我尝试迭代它时,我得到:

Incopatible types:  
Required: java.lang.Class <? extends IMyInterface>  
Found: IMyInterface  

我的迭代

for (IMyInterface iMyInterface : IMyInterface.getMyPluggables()) {}

红色代码警告突出显示(Android Studio)

Error:(35, 90) error: incompatible types: Class<? extends IMyInterface> cannot be converted to IMyInterface  

我想要

ArrayList<Class<? extends IMyInterface>> classes = new ArrayList<>();

for (Class<? extends IMyInterface> myClass : classes) {
    if (myClass instanceof IMyInterface) {
        View revPluggableViewLL = myClass.getMyInterfaceMethod();
    }
}

错误

Inconvertible types; cannot cast 'java.lang.Class<capture<? extends com.myapp.IMyInterface>>' to 'com.myapp.IMyInterface'  

我该怎么去迭代呢？

谢谢大家.

Answer 1

您希望迭代实例,IMyInterface因为您要调用以下特定方法IMyInterface:

    View revPluggableViewLL = myClass.getMyInterfaceMethod();

问题是,你宣布List的Class实例:

ArrayList<Class<? extends IMyInterface>> classes = new ArrayList<>();

它不包含任何实例,IMyInterface只包含 Class实例.

为了满足您的需求,请声明以下列表IMyInterface:

List<IMyInterface> instances = new ArrayList<>();

并以这种方式使用它:

for (IMyInterface myInterface : instances ) {
   View revPluggableViewLL = myInterface.getMyInterfaceMethod();   
}

请注意,此检查不是必需的:

if (myClass instanceof IMyInterface) {
    View revPluggableViewLL = myClass.getMyInterfaceMethod();
}

你操纵List的IMyInterface,所以的元素List是必然的情况IMyInterface.