自定义RecyclerView之LinearLayoutManager垂直布局

最新推荐文章于 2023-04-21 15:04:48 发布

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最新推荐文章于 2023-04-21 15:04:48 发布

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本文介绍如何使用Android中的RecyclerView组件创建一个动态列表。通过示例代码展示了RecyclerView的基本用法，包括依赖添加、XML布局定义、适配器编写及数据绑定等关键步骤。

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*注意一定要先添加依赖：

compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'

XML布局：

man:

?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="chenchneg20171009.bwie.com.lianxi10day13_1.MainActivity">
    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
</LinearLayout>
item1:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:background="#330000ff"
    android:orientation="horizontal">
<ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@mipmap/ic_launcher"/>
<TextView
    android:id="@+id/tv_name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="20sp"/>
    <TextView
        android:id="@+id/tv_age"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"/>
</LinearLayout>
Activity 主类：

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

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

public class MainActivity extends AppCompatActivity {
    RecyclerView rv;
    List<ItemBrean> list=new ArrayList<ItemBrean>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化数据
        rv= (RecyclerView) findViewById(R.id.rv);
        //设置布局管理器
        rv.setLayoutManager(new LinearLayoutManager(this));
        for (int i=0;i<100;i++){
          ItemBrean itemBrean=  new ItemBrean("name"+i,"age"+i);
            list.add(itemBrean);
        }
        MyAdapter myAdapter=new MyAdapter(this,list);
                rv.setAdapter(myAdapter);
    }
}
Adapter 类：
import java.util.List;

/**
 * Created by dell on 2017/10/13.
 */

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
   private Context context;
    private List<ItemBrean> list;
    public MyAdapter(Context context, List<ItemBrean> list){
        this.context=context;
        this.list=list;
    }
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         View view= LayoutInflater.from(context).inflate(R.layout.item1,parent,false);
        Type1ViewHolder type1ViewHolder = new Type1ViewHolder(view);
        return type1ViewHolder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        ItemBrean itemBrean = list.get(position);
        //强转
        Type1ViewHolder type= (Type1ViewHolder) holder;
        type.tvname.setText(itemBrean.getName());
        type.tvage.setText(itemBrean.getName());

    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    private class Type1ViewHolder extends RecyclerView.ViewHolder{
        TextView tvname;
       TextView tvage;
        public Type1ViewHolder(View itemView) {
            super(itemView);
            tvname = itemView.findViewById(R.id.tv_name);
           tvage = itemView.findViewById(R.id.tv_age);
        }
    }
}
user 类：
import java.util.List;

/**
 * Created by dell on 2017/10/13.
 */

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
   private Context context;
    private List<ItemBrean> list;
    public MyAdapter(Context context, List<ItemBrean> list){
        this.context=context;
        this.list=list;
    }
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         View view= LayoutInflater.from(context).inflate(R.layout.item1,parent,false);
        Type1ViewHolder type1ViewHolder = new Type1ViewHolder(view);
        return type1ViewHolder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        ItemBrean itemBrean = list.get(position);
        //强转
        Type1ViewHolder type= (Type1ViewHolder) holder;
        type.tvname.setText(itemBrean.getName());
        type.tvage.setText(itemBrean.getName());

    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    private class Type1ViewHolder extends RecyclerView.ViewHolder{
        TextView tvname;
       TextView tvage;
        public Type1ViewHolder(View itemView) {
            super(itemView);
            tvname = itemView.findViewById(R.id.tv_name);
           tvage = itemView.findViewById(R.id.tv_age);
        }
    }
}