如何根据onCreateViewHolder方法中的位置在RecyclerView中膨胀不同的布局 [英] How to inflate different layout in RecyclerView based on its position in onCreateViewHolder method

问题描述

我试图将ListView重构为RecyclerView，但我陷入了这种情况.

I am trying to refactor my ListView to RecyclerView and I stuck in this situation.

在我的ListView适配器中，我有类似以下内容:

In my ListView Adapter i have something like this:

@Override
public int getItemViewType(int position) {
    if (mDecommissionMode && position == getCount() - 1)
        return 1;
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    if (getItemViewType(position) == 0)
        return getNormalView(position, convertView, parent);
    else
        return getManualDecommissionView(convertView, parent);

}

我不知道如何将其应用于RecyclerView适配器，因为我无权访问onCreateViewHolder方法中的位置.

I don't have an idea how can I apply this to my RecyclerView adapter because I don't have access to the position in onCreateViewHolder method, where the layout should be inflated.

以下是我的RecyclerView适配器中的方法:

Here are the methods in my RecyclerView Adapter:

@Override
public DevicesItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    DevicesRecyclerViewAdapter.DevicesItemViewHolder holder = new DevicesItemViewHolder(); //should pass some inflated view to ViewHolder instance
    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            mOnClickListener.onClick(view);
        }
    });
    return holder;
}


@Override
public void onBindViewHolder(DevicesItemViewHolder holder, int position) {


}

有办法应对吗?

推荐答案

为两个布局创建两个视图支架

遵循这三个简单步骤

Create Two View Holders for two Layouts

Follow these three simple steps

• 覆盖getItemViewType(int position)

根据中的ViewType返回不同​​的ViewHolders onCreateViewHolder()方法

Return different ViewHolders based on the ViewType in onCreateViewHolder() method

基于onBindViewHolder()中的itemViewType填充视图 方法(这解决了您面临的位置问题)

Populate View based on the itemViewType in onBindViewHolder() method (This solves the position problem you are facing)

这是RecyclerView Adapter的一个小代码段
您可以查看完整的代码以供参考

Here is a small code snippet for RecyclerView Adapter
You can see the full code for reference Here

public class YourListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

private static final int LAYOUT_ONE= 0;
private static final int LAYOUT_TWO= 1;

@Override
public int getItemViewType(int position)
{
    if(position==0)
        return LAYOUT_ONE;
    else
        return LAYOUT_TWO;
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {


    View view =null;
    RecyclerView.ViewHolder viewHolder = null;

    if(viewType==LAYOUT_ONE)
    {
        view = LayoutInflater.from(parent.getContext()).inflate(R.layout.one,parent,false);
        viewHolder = new ViewHolderOne(view);
    }
    else
    {
        view = LayoutInflater.from(parent.getContext()).inflate(R.layout.two,parent,false);
        viewHolder= new ViewHolderTwo(view);
    }

    return viewHolder;
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {


    if(holder.getItemViewType()== LAYOUT_ONE)
    {

    }
    else {

        ViewHolderOne vaultItemHolder = (ViewHolderOne) holder;
        vaultItemHolder.name.setText(displayText);
        vaultItemHolder.name.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                .......
            }
        });

    }

     
}



public class ViewHolderOne extends RecyclerView.ViewHolder {

    public TextView name;
    
    public ViewHolderOne(View itemView) {
        super(itemView);
        name = (TextView)itemView.findViewById(R.id.displayName);
        
    }
}

public class ViewHolderTwo extends RecyclerView.ViewHolder{

    public ViewHolderTwo(View itemView) {
        super(itemView);
        
        ..... Do something
    }
}
}

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