如何使用RecyclerView,尝试遵循developer.android.com建议,但得到错误

Question

我正在尝试使用RecyclerView来显示我的数据集,尝试关注此网站 https://developer.android.com/training/material/lists-cards.html

问题是有一些部分是错误的,无法找到如何解决它,我确切地说该网站的建议.

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private String[] mDataset;

    // Provide a reference to the views for each data item
    // Complex data items may need more than one view per item, and
    // you provide access to all the views for a data item in a view holder
    public static class ViewHolder extends RecyclerView.ViewHolder {
        // each data item is just a string in this case
        public TextView mTextView;
        public ViewHolder(TextView v) {
            super(v);
            mTextView = v;
        }
    }

    // Provide a suitable constructor (depends on the kind of dataset)
    public MyAdapter(String[] myDataset) {
        mDataset = myDataset;
    }

    // Create new views (invoked by the layout manager)
    @Override
    public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
                                               int viewType) {
        // create a new view
        View v = LayoutInflater.from(parent.getContext())
                           .inflate(R.layout.my_text_view, parent, false);
        // set the view's size, margins, paddings and layout parameters
        ...
        ViewHolder vh = new ViewHolder(v);     // ERROR
        return vh;
    }

    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        // - get element from your dataset at this position
        // - replace the contents of the view with that element
        holder.mTextView.setText(mDataset[position]);

    }

    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return mDataset.length;
    }
}

Android Studio给出了一个错误:

ViewHolder (android.widget.TextView) in ViewHolder cannot be applied
to         (android.view.View)

我该怎么做？

看来developer.android.com在这里有一些错字？

Answer 1

当您膨胀视图时，通常最好创建您正在膨胀的特定类型视图的实例。在这种情况下，您正在膨胀一个TextView. 由于TextView来自编译器的扩展View不会抱怨它，但是当您尝试将其用作您的应用View程序时TextView，您的应用程序将会崩溃。

// create a new view
TextView v = (TextView) LayoutInflater.from(parent.getContext())
                       .inflate(R.layout.my_text_view, parent, false);

改成。View​TextView