用RecyclerView填充ListArray

Question

我正在使用列表数组填充我的回收商视图。我已经试过String Array了是我做错了，还是必须使用数组适配器？

如果我必须去阵列适配器，我怎么做呢？我已经用arrayadapter填充了listview，但是由于我在大洋中，我不想尝试一些大的东西。我的回收视图适配器的代码如下。

它没有显示出一个错误。但是视图正在填充数组上的最后一项。

public class AudioRecycleViewAdapter extends 
RecyclerView.Adapter<RecyclerView.ViewHolder> {
private  List<String> values = Arrays.asList ("Al Feel","Al Humazah","Al 
Kausar","Al Maoon","Al Quresh","Dr Israr",
        "Al Kafiroon","An Nasr","Al Lahab","Al Ikhlaas","Al Falaq","An 
Naas","Iman Part 1",
        "Iman Part 2","Iman Part 3","Iman Part 4","Iman Part 5");

Context context;
InterstitialAd mInterstitialAd;
private int audiolayout;
public TextView txtHeader;
public TextView txtFooter;
TextView txtarabic;


public AudioRecycleViewAdapter(List<String> values, int audiolayout, Context context, InterstitialAd intAdView ) throws IOException {
    this.audiolayout = audiolayout;
    this.context = context;
    this.mInterstitialAd = intAdView;
}
public Context getContext() {
    context = this.getContext();
    return context;
}

// 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 class ViewHolder extends RecyclerView.ViewHolder {
    // each data item is just a string in this case
    public View layout;

    public ViewHolder(View v) {
        super(v);
        layout = v;
        txtHeader = (TextView) v.findViewById(R.id.audio_subtitle);
        txtFooter = (TextView) v.findViewById(R.id.audio_title);
        txtarabic = (TextView) v.findViewById(R.id.arabic_title);
    }
}

public void add(int position, String item) {
    values.add(position, item);
    notifyItemInserted(position);
}

public void remove(int position) {
    values.remove(position);
    notifyItemRemoved(position);
}
// Create new views (invoked by the layout manager)
@Override
public AudioRecycleViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
                                               int viewType) {
    // create a new view
    LayoutInflater inflater = LayoutInflater.from(
            parent.getContext());

    View v =
            inflater.inflate(R.layout.audio_row_layout, parent, false);
    // set the view's size, margins, paddings and layout parameters
    ViewHolder vh = new ViewHolder(v);

    return vh;
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    int x;
    for(position =0; position < values.size(); position++)
    {
        txtHeader.setText(values.get(position));
        position++;
    }

}

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

}

Answer 1

首先:在ViewHolder中使用自定义AudioRecycleViewAdapter，因此更改以下内容

extends RecyclerView.Adapter<RecyclerView.ViewHolder>

到这个

extends RecyclerView.Adapter<AudioRecycleViewAdapter.ViewHolder>

第二:您正在遍历所有元素，只需在textHeader中显示最后一个值并使用holder.txtHeader。

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        holder.txtHeader.setText(values.get(position));

}

第三:子视图的项目布局视图，应该在ViewHolder内部所以

public class ViewHolder extends RecyclerView.ViewHolder {
    // each data item is just a string in this case
    public View layout;
    public TextView txtHeader;
    public TextView txtFooter;
    public TextView txtarabic;

    public ViewHolder(View v) {
        super(v);
        layout = v;
        txtHeader = (TextView) v.findViewById(R.id.audio_subtitle);
        txtFooter = (TextView) v.findViewById(R.id.audio_title);
        txtarabic = (TextView) v.findViewById(R.id.arabic_title);
    }
}

Answer 2

除了Pavneet的答案之外，还可以将bind()方法添加到您的自定义ViewHolder中，并在此方法中绑定与RecyclerView项相关的数据。当事情变得更加复杂时，我在简单的项目中使用了这种方法。它应该是这样的：

//adapter's inner
class SomeClassViewHolder(val view: View) extends RecyclerView.ViewHolder(view) {
    //here can be view initializing, like
    txtHeader = (TextView) view.findViewById(R.id.audio_subtitle);

    void bind(int position){
        // all view binding logic goes here, for example:
        txtHeader.setText("someText");
    }
}

//and then in adapter
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        holder.bind(values.get(position));
}

编辑:如果使用得当，应该可以帮助您避免在查找holder的绑定属性(如textView等)时遇到的问题。此外，将来您还可以在bind()方法中操作holder的项侦听器。