Android RecyclerView网格布局

Posted 2020-12-30 命运的绯色结局

一个简单的网格布局activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<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=".MainActivity">

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


</android.support.constraint.ConstraintLayout>

message_main_notice_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="150dp"
    android:gravity="center"
    android:background="@color/colorAccent"
    android:orientation="vertical"
    android:layout_marginTop="5dp"
    >

    <ImageView
        android:id="@+id/iv_image"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:background="@mipmap/logo"
        android:gravity="center"></ImageView>

    <LinearLayout
        android:layout_width="60dp"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingLeft="5dp">

        <TextView
            android:id="@+id/tv_title"
            android:layout_width="match_parent"
            android:layout_height="30dp"
            android:gravity="center"
            android:text="BIBIA"></TextView>


    </LinearLayout>


</LinearLayout>

适配器MyRecyclerViewAdapter.java：

package com.example.administrator.recyclerviewtest;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder>{
    private List<ItemBean> mList;

    static class ViewHolder extends RecyclerView.ViewHolder{
        View myView;
        ImageView imageView;
        TextView title;
        public ViewHolder(View itemView) {
            super(itemView);
            myView = itemView;
            imageView = (ImageView) itemView.findViewById(R.id.iv_image);
            title = (TextView) itemView.findViewById(R.id.tv_title);
        }
    }

    public MyRecyclerViewAdapter(List<ItemBean> list){
        this.mList = list;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.message_main_notice_list,null);
        final ViewHolder holder = new ViewHolder(view);
        return holder;
    }

    //将数据绑定到控件上
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        ItemBean bean = mList.get(position);
        holder.imageView.setBackgroundResource(bean.itemImage);
        holder.title.setText(bean.itemTitle);
    }

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


    //下面两个方法提供给页面刷新和加载时调用
    public void add(List<ItemBean> addMessageList) {
        //增加数据
        int position = mList.size();
        mList.addAll(position, addMessageList);
        notifyItemInserted(position);
    }

    public void refresh(List<ItemBean> newList) {
        //刷新数据
        mList.removeAll(mList);
        mList.addAll(newList);
        notifyDataSetChanged();
    }
}

主方法：

package com.example.administrator.recyclerviewtest;

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

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

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;

    private List<ItemBean> list;

    private MyRecyclerViewAdapter myAdapte1r;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        list = new ArrayList<ItemBean>();
        for ( int i=0; i< 19;i++){
            list.add(new ItemBean(
                    R.mipmap.logo,
                    "Hello",
                    new Date().toString()+""
            ));
        }
        myAdapte1r = new MyRecyclerViewAdapter(list);

        recyclerView = (RecyclerView) findViewById(R.id.message_notice_list_item);

        //纵向线性布局
        //LinearLayoutManager layoutManager = new LinearLayoutManager(this);

        //纵向线性布局
        GridLayoutManager layoutManager = new GridLayoutManager(this,2);

        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setAdapter(myAdapte1r);
    }
}

效果：