RecyclerView显示来自2种不同布局的数据

时间:2016-12-13 08:23:19

标签: java android android-recyclerview recycler-adapter recyclerview-layout

我在 RecyclerView 中使用适配器类中的以下codeshow data,但现在我想显示一些数据使用不同布局的相同 RecyclerView中的其他ArrayListsome positions喜欢:第1位和第6位)。

不同的布局(假设: another_layout.xml )包含 2 TextViews 图像,也想要在布局的侦听器上实现单击 ..

    @Override
    public PlaylistCardAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        // inflate a card layout
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.youtube_video_card, parent, false);
        // populate the viewholder
        ViewHolder vh = new ViewHolder(v);
        return vh;
    }

4 个答案:

答案 0 :(得分:1)

RecyclerView适用于多个布局
1.覆盖getItemViewType(int position)方法
例如,我有两个布局layout1和layout2.我希望layout1在顶部,然后layout2。所以getItemViewType就是这样的

@Override
public int getItemViewType(int position) {

    if(position == 0){    //for layout1
        return 1;
    }else{
        return 2;        //for layout2
    }
}

2。像这样的每个布局的不同视图

class ViewHolder_LayoutOne extends RecyclerView.ViewHolder{
    TextView name;
    //Constructor
}

class ViewHolder_LayoutTwo extends RecyclerView.ViewHolder{
    TextView name;
    //Constructor
}

3。根据位置膨胀不同的布局

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

    RecyclerView.ViewHolder vh = null;
    if(viewType == 1){

        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_layout_one,parent,false);
        vh = new MyViewHolder_LayoutOne(view);
    }else if(viewType == 2){

        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_layout_two,parent,false);
        vh = new MyViewHolder_LayoutTwo(view);
    }
    return vh;
}

4。根据职位绑定您的观点

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


    switch(getItemViewType(position)){

        case 1: //for layout 1
            ((ViewHolder_LayoutOne)holder).name.setText("");
            break;

        case 2:// for layout 2
            ((ViewHolder_LayoutTwo)holder).name.setText("");
            break;
    }
}

5.现在最重要的getItemCount()方法//返回视图数

@Override
public int getItemCount() {
    return toptitles.length + 1; 
   // as i have only layout at the top and the remaining size equals the length of the array toptitles.So the overall length would be 
   //number of views of layout1 + number of views of layout2
}

希望这有帮助!!!

答案 1 :(得分:0)

您可以覆盖 getItemViewType ,并使用不同的ViewHolder进行不同的布局。

答案 2 :(得分:0)

您需要覆盖 getItemViewType ,如下所示:

@Override
    public int getItemViewType(int position) {
      Add your condition and return viewType(Constant)
    }

现在,检查viewType并相应地重新调整viewHolder。

    @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
          if (viewType == VIEWHOLDER1) {
                View v = LayoutInflater.from(activity).inflate(R.layout.layout1, parent, false);
                return new ViewHolder1(v);
          }else if(viewType == VIEWHOLDER2){
                View v = LayoutInflater.from(activity).inflate(R.layout.layout2, parent, false);
                return new ViewHolder2(v);
          }
        }

现在,检查viewHolder的实例

@Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
         if (holder instanceof ViewHolder1) {
             Show values in UI accordingly.
         }else if(holder instanceof ViewHolder2){
             Show values in UI accordingly.
         }
}

答案 3 :(得分:0)

您可以使用所需的布局在getItemViewType(int position)中设置所需的类型。在onCreateViewHolder中,您可以检查viewType并相应地对该行进行充气。

here is an example.