如何使用RecyclerView,试图遵循developer.android.com的建议,但出现错误
我正在尝试使用RecyclerView来显示我的数据集,尝试关注这个网站 问题是,有一些部分出错,无法找到如何修复它,我做的正是该网站所建议的如何使用RecyclerView,试图遵循developer.android.com的建议,但出现错误,android,android-recyclerview,android-adapter,layout-inflater,android-viewholder,Android,Android Recyclerview,Android Adapter,Layout Inflater,Android Viewholder,我正在尝试使用RecyclerView来显示我的数据集,尝试关注这个网站 问题是,有一些部分出错,无法找到如何修复它,我做的正是该网站所建议的 public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> { private String[] mDataset; // Provide a reference to the views for each data item
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;
}
}
我该怎么做
似乎开发者.android.com有一些打字错误?你试过吗
ViewHolder vh = new ViewHolder((TextView) v);
ViewHolder中的构造函数持有TextView。因此,您无法将视图发送到ViewHolder。尝试像这样将视图缓存到TextView
ViewHolder vh = new ViewHolder((TextView)v);
膨胀视图时,通常最好创建正在膨胀的特定类型视图的实例。在这种情况下,您正在对
文本视图进行充气。由于TextView
是从View
扩展而来,编译器不会对此抱怨,但当您尝试将View
用作TextView
时,您的应用程序将崩溃
// create a new view
TextView v = (TextView) LayoutInflater.from(parent.getContext())
.inflate(R.layout.my_text_view, parent, false);
将视图
更改为文本视图
请在您的问题中添加ViewHolder代码。您的ViewHolder
类在哪里?添加了完整的代码,就像在那个网站上一样,似乎我已经得到了答案,但developer.android.com网站上似乎有打字错误。这将有助于解决问题,但是,@Glurt-answer是一种更合适的方法吗?在这种情况下,你的观点没有什么不同。这是第一个答案,而且很有帮助。改为使用@Glurt-answer
// create a new view
TextView v = (TextView) LayoutInflater.from(parent.getContext())
.inflate(R.layout.my_text_view, parent, false);