在当前上下文中不可访问

问题描述

我有以下代码

public abstract class BaseAdapter<T, V extends BaseAdapter.ViewHolder> extends ArrayAdapter<T> {
    public BaseAdapter(Context context, int resource, Collection<T> collection) {
        // typical constructor logic
    }

    // some other custom defined methods

    public static class ViewHolder {
        // custom defined logic
    }
}

public class ModelAdapter extends BaseAdapter<Model, ModelAdapter.ModelViewHolder> {
    public ModelAdapter(Context context, int resource, Collection<Model> collection) {
       super(context, resource, collection);
       // typical constructor logic
    }

    public static class ModelViewHolder extends ViewHolder {
        // custom defined logic
    }
}

BaseAdapter 和 ModelAdapter 位于单独的文件中.问题是我在尝试定义 ModelAdapter 时出现编译错误:ModelViewHolder 在当前上下文中不可访问

The BaseAdapter and ModelAdapter are in separated files. The problem is that I have a compilation error when trying to define the ModelAdapter:ModelViewHolder is not accessible in current context

我不太明白这个错误，也无法弄清楚我做错了什么.有人可以向我解释这个问题或可以澄清这种情况的链接吗?

I don't really understand this error and can't figure out what I am doing wrong. Can somebody explain to me this problem or a link that may clarify this situation?

推荐答案

Creation Dead Lock

你使用ModelAdapter.ModelViewHolder作为BaseAdapter的模板参数，让ModelAdapter扩展BaseAdapter，然后编译器尝试先创建ModelViewHolder，但尚未创建ModelAdapter.ModelViewHolder(类型为Class)的类.它必须等待 ModelAdapter 被创建，因为 ModelViewHolder 在 ModelAdapter 的范围内.

You use ModelAdapter.ModelViewHolder as the template parameter of BaseAdapter, and let ModelAdapter extends BaseAdapter, then the compiler tried to create ModelViewHolder first, but the class of ModelAdapter.ModelViewHolder(the type is Class) is not yet created. It must wait for ModelAdapter to be created, because ModelViewHolder is in the scope of ModelAdapter.

解决方法是将ModelViewHolder类放到一个新的*.java文件中.

The way to solve it is put the ModelViewHolder class into a new *.java file.

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