RecyclerView每个Position显示不同布局

1.写多个布局作为ViewType插入每个Position中

2.写adpater

（1）用一个list来存放数据

（2）为每一个ViewType创建ViewHolder类来获取布局中的view

（3）onCreateViewHolder：创建holder，将view传入

（4）onBindViewHolder：将资源放入holder中的view

（5）getItemViewType：设置每个position对应的ViewType

3.写fragment/activity

（1）init数据()：将数据存入list中

（2）createContentView：inflat、init数据 、new Adapter。。。

 

1.布局：

（1）picture_item

<?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="match_parent">
    <ImageView
        android:id="@+id/picture_image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/picture_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_marginLeft="10dp"/>

</LinearLayout>

（2）picture_describe

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/picture_describe"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_marginLeft="10dp"/>

</RelativeLayout>

(3)activity_main

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        />

</androidx.constraintlayout.widget.ConstraintLayout>

2.Picture类

package com.example.recyclerviewdemo;

public class Picture {
    private String name;
    private int imageId;
    private String describe;
    public Picture(String name,int imageId,String describe){
        this.name=name;
        this.imageId=imageId;
        this.describe=describe;
    }
    public String getName(){
        return name;
    }
    public int getImageId(){
        return imageId;
    }
    public String getDescribe(){
        return describe;
    }
}

3.Adapter

package com.example.recyclerviewdemo;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;


import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.List;

public class PictureAdapter extends RecyclerView.Adapter {

    private List<Picture> mPictureList;

    static class NameHolder extends RecyclerView.ViewHolder {
        ImageView pictureImage;
        TextView pictureName;

        public NameHolder(View view) {
            super(view);
            pictureImage = (ImageView) view.findViewById(R.id.picture_image);
            pictureName = (TextView) view.findViewById(R.id.picture_name);
        }

    }
    static class DescribeHolder extends RecyclerView.ViewHolder {
        TextView pictureDescribe;

        public DescribeHolder(View view) {
            super(view);
            pictureDescribe = (TextView) view.findViewById(R.id.picture_describe);
        }

    }

    public PictureAdapter(List<Picture> pictureList) {
        mPictureList = pictureList;
    }

    @Override

    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        switch (viewType) {
            case 0:
                View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.picture_item, parent, false);
                NameHolder nameHolder = new NameHolder(view);
                return nameHolder;
            case 1:
                View view2 = LayoutInflater.from(parent.getContext()).inflate(R.layout.pixture_describe, parent, false);
                DescribeHolder describeHolder = new DescribeHolder(view2);
                return describeHolder;
        }
        return null;
    }


    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        Picture picture=mPictureList.get(position);
        if (holder instanceof NameHolder){
            NameHolder nameHolder=(NameHolder) holder;
            nameHolder.pictureImage.setImageResource(picture.getImageId());
            nameHolder.pictureName.setText(picture.getName());
        }
        else if(holder instanceof DescribeHolder){
            DescribeHolder describeHolder=(DescribeHolder) holder;
            describeHolder.pictureDescribe.setText(picture.getDescribe());
        }

    }

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

    @Override
    public int getItemViewType(int position) {
        if (position % 2 == 0) {
            return 0;
        } else {
            return 1;
        }
    }
}

4.MainActivity

package com.example.recyclerviewdemo;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
        import androidx.recyclerview.widget.LinearLayoutManager;
        import androidx.recyclerview.widget.RecyclerView;

        import android.content.ServiceConnection;
        import android.media.MediaPlayer;
        import android.os.Bundle;

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

public class MainActivity extends AppCompatActivity {

    private List<Picture> fruitList = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initFruits();
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        PictureAdapter adapter = new PictureAdapter(fruitList);
        recyclerView.setAdapter(adapter);
    }

    private void initFruits() {
        for (int i = 0; i < 2; i++) {
            Picture apple = new Picture("Apple", R.drawable.apple_pic,"不爱吃");
            fruitList.add(apple);
            Picture banana = new Picture("Banana", R.drawable.banana_pic,"不爱吃");
            fruitList.add(banana);
            Picture orange = new Picture("Orange", R.drawable.orange_pic,"爱吃");
            fruitList.add(orange);
            Picture watermelon = new Picture("Watermelon", R.drawable.watermelon_pic,"爱吃");
            fruitList.add(watermelon);
            Picture pear = new Picture("Pear", R.drawable.pear_pic,"不爱吃");
            fruitList.add(pear);
            Picture grape = new Picture("Grape", R.drawable.grape_pic,"爱吃");
            fruitList.add(grape);
            Picture pineapple = new Picture("Pineapple", R.drawable.pineapple_pic,"爱吃");
            fruitList.add(pineapple);
            Picture strawberry = new Picture("Strawberry", R.drawable.strawberry_pic,"爱吃");
            fruitList.add(strawberry);
            Picture cherry = new Picture("Cherry", R.drawable.cherry_pic,"爱吃");
            fruitList.add(cherry);
            Picture mango = new Picture("Mango", R.drawable.mango_pic,"爱吃");
            fruitList.add(mango);

        }
    }
}

 

本文地址：https://blog.csdn.net/m0_37934678/article/details/107943559