Android Studio实现列表展示图片

效果：

MainActivity 类

java 复制代码

package com.example.tabulation;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

public class MainActivity extends AppCompatActivity implements RecyclerViewAdapter.onRecyclerViewItemClickListener {
    //定义一个图片数组
    private int[] image = {R.drawable.img, R.drawable.img_1, R.drawable.img_2, R.drawable.img_3, R.drawable.img_4, R.drawable.img_5,
            R.drawable.img_6, R.drawable.img_7, R.drawable.img_8, R.drawable.img_9, R.drawable.img_10,
            R.drawable.img_11, R.drawable.img_12, R.drawable.img_13, R.drawable.img_14, R.drawable.img_15,
            R.drawable.img_16, R.drawable.img_17, R.drawable.img_18, R.drawable.img_19};
    private RecyclerView recyclerview;

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

    private void initView() {
        recyclerview = (RecyclerView) findViewById(R.id.recyclerview);
        //新建一个RecyclerView的适配器，并传入数据
        RecyclerViewAdapter recyclerViewAdapter = new RecyclerViewAdapter(this, image);
        //将适配器设置给recyclerview控件
        recyclerview.setAdapter(recyclerViewAdapter);
        //新建一个StaggeredGridLayoutManager布局管理器，设置参数：1.显示的列数   2.显示布局的方向（水平或垂直）
        //StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(1, StaggeredGridLayoutManager.VERTICAL);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(MainActivity.this,LinearLayoutManager.VERTICAL,false);
        //将布局管理器设置给recyclerveiw控件
        //recyclerview.setLayoutManager(staggeredGridLayoutManager);
        recyclerview.setLayoutManager(linearLayoutManager);
        //给适配器添加我们暴露的监听方法
        recyclerViewAdapter.setOnRecyclerViewItemClickListener(this);

    }


    //实现我们的监听接口里的方法，在这里获得数据，对数据进行操作
    @Override
    public void onItemClick(View view, int img) {
        //创建一个intent，指明跳转目标类
        Intent intent = new Intent(this, ImageDetail.class);
        //拿到数据传给intent
        intent.putExtra("image", img);
        //启动Activity
        startActivity(intent);
    }
}

ImageDetail 类

java 复制代码

package com.example.tabulation;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ImageView;


public class ImageDetail extends Activity{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.imagedetail);
        Intent intent = getIntent();
        int image = intent.getIntExtra("image", R.mipmap.ic_launcher);
        ImageView imag = (ImageView) findViewById(R.id.details_img);
        imag.setImageResource(image);


    }
}

RecyclerViewAdapter 类

java 复制代码

package com.example.tabulation;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.recyclerview.widget.RecyclerView;


//让我们的适配器继承自RecyclerView.Adapter<>，并指定泛型为我们适配器的类名.ViewHolder，
// ViewHolder继承自RecyclerView.ViewHolder，并实现每个继承要实现的方法
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> implements View.OnClickListener {
    private Context context;
    private int[] image;
    //声明一个这个接口的变量
    private onRecyclerViewItemClickListener mOnRecyclerViewItemClickListener=null;

    //构造函数，主要用于接受数据，方便我们在适配器中对数据操作
    public RecyclerViewAdapter(Context context, int[] image) {
        this.context = context;
        this.image = image;
    }

    //创建ViewHolder，我们需要在这个方法中给新建一个view对象，再初始化一个ViewHolder对象，将view对象传入
    //然后返回一个ViewHolder对象
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        //创建一个view对象（通过布局填充器将布局文件转化为view对象）
        //View view = View.inflate(context, R.layout.waterfall_item, null);
        View view = View.inflate(context, R.layout.imagedetail, null);
        //初始化一个ViewHolder对象，传入view对象
        ViewHolder viewHolder = new ViewHolder(view);

        view.setOnClickListener(this);
        //将ViewHolder对象返回出去
        return viewHolder;
    }

    //绑定ViewHolder，我们需要在这个方法中给控件设置数据
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {

        //给ImageView控件设置数据
        holder.mImageView.setImageResource(image[position]);

        //给每个itemview添加一个Tag,传递数据
        holder.itemView.setTag(image[position]);

        holder.mTextViewID.setText(String.valueOf(position + 1));
        holder.mTextViewName.setText("未知名称");
    }

    //获取item的条目总数
    @Override
    public int getItemCount() {
        //直接返回图片数组的长度即可
        return image.length;
    }

    //将点击事件转移给外面的调用者
    @Override
    public void onClick(View v) {
        if (mOnRecyclerViewItemClickListener != null) {
            //通过v.getTag()接受数据
            mOnRecyclerViewItemClickListener.onItemClick(v, (Integer) v.getTag());
        }

    }

    //我们自定义的ViewHolder类，继承自RecyclerView.ViewHolder
    public class ViewHolder extends RecyclerView.ViewHolder {

        private final TextView mTextViewID;
        private final TextView mTextViewName;
        private final ImageView mImageView;

        public ViewHolder(View itemView) {
            super(itemView);

            mTextViewID = (TextView) itemView.findViewById(R.id.labelID);
            mTextViewName = (TextView) itemView.findViewById(R.id.pokemonName);
            //通过传过来的view对象，我们来实例化控件
            mImageView = (ImageView) itemView.findViewById(R.id.details_img);
        }
    }

    //自定义一个监听的接口，里面包含itemclick的监听方法，主要用于拿数据，方便外部调用拿数据
    public interface onRecyclerViewItemClickListener{
        void onItemClick(View view,int img);
    }

    //定义一个设置Listener的方法（），作用是暴露给外面的调用者，方便调用
    public void setOnRecyclerViewItemClickListener(onRecyclerViewItemClickListener onRecyclerViewItemClickListener) {
        mOnRecyclerViewItemClickListener = onRecyclerViewItemClickListener;
    }
}

tabulation_item.xml

java 复制代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:padding="3dp"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!--android:adjustViewBounds="true":设置View控件的宽高比等于图片的宽高比（图片不失真）对图片进行等比例放缩。
        android:scaleType="centerCrop"：设置控件的中心与图片的中心一致，对图片进行等比例放缩，直到填充满view控件。
        一般这两个属性搭配使用-->
    <TextView

        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />
    <ImageView
        android:id="@+id/show_img"
        android:adjustViewBounds="true"
        android:scaleType="centerCrop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
</LinearLayout>

imagedetail.xml

java 复制代码

<?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"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="10sp"
        android:orientation="horizontal">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:orientation="horizontal"
            android:layout_gravity="center">

            <TextView
                android:id="@+id/labelID"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:text="编号"
                android:textSize="16sp" />

            <TextView
                android:id="@+id/pokemonName"
                android:layout_width="250dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:text="名字"
                android:textSize="16sp" />
        </LinearLayout>

        <ImageView
            android:id="@+id/details_img"
            android:adjustViewBounds="true"
            android:scaleType="centerCrop"
            android:layout_width="50dp"
            android:layout_height="50dp"/>

    </LinearLayout>




</LinearLayout>

activity------main.xml

java 复制代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    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="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>