RecyclerView 多条目包括点击事件

最新推荐文章于 2019-12-12 10:31:55 发布

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最新推荐文章于 2019-12-12 10:31:55 发布

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本文链接：https://blog.youkuaiyun.com/yukaihuaboke/article/details/78702607

版权

本文介绍了如何在Android中使用RecyclerView实现多条目显示，并添加点击及长按事件。通过自定义适配器和接口回调，实现了不同类型的条目（纯文本、图片左对齐、图片右对齐）的点击和长按事件处理。

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导入依赖

compile 'com.android.support:recyclerview-v7:25.3.1'
//效果

主布局文件
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.bwei.administrator.dianshang.activity.ThridActivity">

    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/recycle_view"
        >

    </android.support.v7.widget.RecyclerView>


</android.support.constraint.ConstraintLayout>
=============mainActivity================
  private RecyclerView recyclerView;
private List<String> list;
private MoreItemAdapter ma;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_thrid);
    //获取控件
    recyclerView = (RecyclerView) findViewById(R.id.recycle_view);
     //数据源
    list = new ArrayList<>();
     for (int i=0;i<1000;i++){
         list.add("条目"+i);
     }
     //布局管理
     recyclerView.setLayoutManager(new LinearLayoutManager(ThridActivity.this));


    //创建适配器
       ma = new MoreItemAdapter(list,ThridActivity.this);
      recyclerView.setAdapter(ma);

    //条目的点击事件   接口回调
        ma.setOnitemClickListner(new OnItemClickListner() {
            @Override
            public void onItemClick(int position) {
                Toast.makeText(ThridActivity.this,"点击了"+list.get(position),Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onItemLongClick(int position) {
                Toast.makeText(ThridActivity.this,"长按了"+list.get(position),Toast.LENGTH_SHORT).show();
            }
        });



}
  =============适配器================
      List<String> list;
Context context;
private final int text_Only=0;
private final int IMAGE_LEFT=1;
private final int IMAGE_RIGHT=2;
private OnItemClickListner onItemClickListner;


public MoreItemAdapter(List<String> list, Context context) {
    this.list = list;
    this.context = context;
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        RecyclerView.ViewHolder holder=null;
        View view;
        switch (viewType){
            case text_Only:
                view= LayoutInflater.from(context).inflate(R.layout.water_item,parent,false);
               holder=new Text_Only(view);
                break;
            case IMAGE_LEFT:
                view= LayoutInflater.from(context).inflate(R.layout.image_left,parent,false);
                holder=new Image_left(view);
                break;
            case IMAGE_RIGHT:
                view= LayoutInflater.from(context).inflate(R.layout.image_right,parent,false);
                holder=new Image_Right(view);
                break;
        }
    return holder;
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
    //判断方法返回值
    if(getItemViewType(position)==text_Only){
        ((Text_Only)holder).tv.setText(list.get(position));
        //条目点击
        ((Text_Only)holder).tv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onItemClickListner.onItemClick(position);
            }
        });
        ((Text_Only)holder).tv.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                onItemClickListner.onItemLongClick(position);
                return true;
            }
        });
    }else if(getItemViewType(position)==IMAGE_LEFT){
        ((Image_left)holder).tv.setText(list.get(position));
    }else{
        ((Image_Right)holder).tv.setText(list.get(position));
    }


}

@Override
public int getItemCount() {
    return list.size();
}

@Override
public int getItemViewType(int position) {
    if(position%3==0){
        return text_Only;
    }else if(position%3==1){
        return IMAGE_LEFT;
    }else{
        return IMAGE_RIGHT;
    }


}

public void setOnitemClickListner(OnItemClickListner onItemClickListner) {
    this.onItemClickListner = onItemClickListner;

    //onItemClickListner.onItemClick();
}
  ==========接口===========
  public interface OnItemClickListner {
    public void onItemClick(int position);
    public void onItemLongClick(int position);

}