RecyclerView(多条目)

最新推荐文章于 2021-05-20 15:52:52 发布

安卓小闸门

最新推荐文章于 2021-05-20 15:52:52 发布

阅读量210

点赞数

本文介绍了一个使用RecyclerView实现多类型布局的示例应用。通过自定义Adapter和ViewHolder，实现了交错显示不同类型的视图组件，包括TextView和ImageView。此外，还展示了如何通过GridLayoutManager设置网格布局。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

package com.example.recyclerview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private List<String> list;
    private RecyclerView rv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        rv = (RecyclerView) findViewById(R.id.rv);

        initRV();



    }

    private void initRV() {

        initList();
        //得到适配器
        MyRreyclerView1 rreyclerView1 = new MyRreyclerView1();
        //绑定
        rv.setAdapter(rreyclerView1);
        //布局效果
        GridLayoutManager manager = new GridLayoutManager(this,3);
        //绑定布局
        rv.setLayoutManager(manager);


    }

    private void initList() {
        list = new ArrayList<>();
        for (int i = 0; i < 100; i++) {
            list.add("破亚美"+i);
        }
    }


    class  MyRreyclerView1 extends RecyclerView.Adapter<RecyclerView.ViewHolder>{

        public static final int TYPE_ONE = 1;
        public static  final int TYPE_TOW = 2;

        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            //判断展示不同的布局
            if (viewType == TYPE_ONE){
                View view = View.inflate(MainActivity.this,R.layout.rv1,null);
                MyViewHolder1 holder1 = new MyViewHolder1(view);
                return holder1;
            }else{
                View view1 = View.inflate(MainActivity.this,R.layout.tv2,null);
                MyViewHolder2 holder2 = new MyViewHolder2(view1);
                return holder2;
            }
        }

        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
            //输入值
            if (holder instanceof MyViewHolder1){
                 ((MyViewHolder1) holder).tv.setText("");
            }
            if (holder instanceof MyViewHolder2){
                ((MyViewHolder2) holder).im.setText(list.get(position));
            }
        }

        @Override
        public int getItemCount() {
            return list == null ? 0 :list.size();
        }


        //判断多条目方法
        @Override
        public int getItemViewType(int position) {
            if (position % 2 ==0  ){
                return  TYPE_ONE;
            }else {
                return TYPE_TOW;
            }
        }
    }

    //Holder1
    class  MyViewHolder1 extends RecyclerView.ViewHolder{

        private final TextView tv;

        public MyViewHolder1(View itemView) {
            super(itemView);
            tv = (TextView) itemView.findViewById(R.id.tv);
        }
    }

    //Holder2
    class MyViewHolder2 extends  RecyclerView.ViewHolder{

        private final TextView im;

        public MyViewHolder2(View itemView) {
            super(itemView);
            im = (TextView) itemView.findViewById(R.id.tv2);
        }
    }


}