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使用listview和adapter显示数据

程序员文章站 2022-07-02 09:26:03
listview和adapter显示数据工具JDKSDKAndroid Studio布局页面list_view.xmllist_view_item.xmldetails.xml实体类Production适配器 AdapterMydapterActivityListViewActivityDetailsActivity运行结果用到的背景效果shape.xmlshape1.xml工具JDKSDKAndroid Studio布局页面list_view.xml控件代码

listview和adapter显示数据

工具

JDK

SDK

Android Studio

布局页面

list_view.xml

  1. 控件

  2. 代码

<?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"
    android:background="#F2F2F2">
    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/listView"
        android:layout_gravity="center"
        android:background="@drawable/shape"
        android:layout_marginBottom="10dp"/>
</LinearLayout>

list_view_item.xml

  1. 代码
<?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"
    android:orientation="horizontal"
    android:background="#F2F2F2">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/shape"
        android:layout_margin="10dp"
        android:id="@+id/linear">
        <ImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:id="@+id/img"
            android:src="@mipmap/ic_launcher"
            android:padding="5dp"/>
        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center_horizontal">
            <LinearLayout
                android:orientation="horizontal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center">
                <TextView
                    android:id="@+id/name"
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:textSize="20sp"
                    android:text="商品名"
                    android:textColor="#000000"/>
            </LinearLayout>
            <LinearLayout
                android:orientation="horizontal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:layout_marginTop="10dp">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:textSize="14sp"
                    android:text="价格:"
                    />
                <TextView
                    android:id="@+id/price"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textSize="14sp"
                    android:text="15.5"
                    />
            </LinearLayout>
            <TextView
                android:id="@+id/detail"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:ems="20"
                android:gravity="center"
                android:text="商品简述内容商品简述内容内容"
                android:textSize="13dp"
                />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

details.xml

  1. 代码
<?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"
    android:orientation="vertical">
    <!--详情页面-->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="300dp"
            android:id="@+id/img"
            android:layout_gravity="center_horizontal"
            android:src="@mipmap/ic_launcher"
            android:layout_marginTop="50dp"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="100dp"
            android:id="@+id/textView1"
            android:visibility="invisible"/>
        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="商品XXX"
                android:id="@+id/name"
                android:textSize="20sp"
                android:textColor="#000000"/>
        </LinearLayout>
        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:layout_marginTop="30dp"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#000000"
                android:text="商品详情内容"
                android:id="@+id/details" />
        </LinearLayout>
        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal"
            android:layout_marginTop="30dp">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#FF0000"
                android:text="￥"
                android:id="@+id/priceLb"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#FF0000"
                android:text="XX"
                android:id="@+id/price"/>
        </LinearLayout>
        <Button
            android:id="@+id/comment"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="添加购物车"
            android:textColor="#000000"
            android:layout_gravity="center"
            android:layout_marginTop="30dp"
            android:background="@drawable/shape1"
            />
    </LinearLayout>
</LinearLayout>

实体类

Production

代码

package com.huanggf.mylistview.entity;
//构建实体类
public class Production {
    private int imgId;
    private String productionName;
    private Double productionPrice;
    private String productionDetail;

    public int getImgId() {
        return imgId;
    }
    public void setImgId(int imgId) {
        this.imgId = imgId;
    }
    public String getProductionName() {
        return productionName;
    }
    public void setProductionName(String productionName) {
        this.productionName = productionName;
    }
    public Double getProductionPrice() {
        return productionPrice;
    }
    public void setProductionPrice(Double productionPrice) {
        this.productionPrice = productionPrice;
    }
    public String getProductionDetail() {
        return productionDetail;
    }
    public void setProductionDetail(String productionDetail) {
        this.productionDetail = productionDetail;
    }
}

适配器 Adapter

Mydapter

代码

package com.huanggf.mylistview;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;


import com.huanggf.mylistview.entity.Production;

import java.util.List;

public class MyAdapter extends BaseAdapter {
    private ImageView img;
    private TextView name,price,detail;
    private LinearLayout linear;
    //数据
    private List<Production> productionList = null;
    private Context context = null;
    public MyAdapter(List<Production> productionList, Context context) {
        super();
        this.productionList = productionList;
        this.context = context;
    }
    /*
    * 数据集中有多少条
    * */
    @Override
    public int getCount() {
        return productionList.size();
    }
    /*
    * 获取数据集中指定位置关联的数据
    * */
    @Override
    public Object getItem(int i) {
        return productionList.get(i);
    }
    /*
    * 获取与列表中指定位置关联的行id
    * */
    @Override
    public long getItemId(int i) {
        return i;
    }
    /*
    * 视图相关操作
    * */
    @Override
    public View getView(final int i, View view, ViewGroup viewGroup) {
        view = LayoutInflater.from(context).inflate(R.layout.list_view_item,null);
        img = (ImageView)view.findViewById(R.id.img);
        name = (TextView) view.findViewById(R.id.name);
        price = (TextView) view.findViewById(R.id.price);
        detail = (TextView) view.findViewById(R.id.detail);   //商品简述
        linear = (LinearLayout) view.findViewById(R.id.linear); 

        //设置组件
        final Production production = productionList.get(i);
        img.setImageResource(production.getImgId());
        name.setText(production.getProductionName());
        price.setText(production.getProductionPrice()+"");

        //商品简述
        String productionDetail = production.getProductionDetail();
        if (productionDetail.length()>20){
            productionDetail = productionDetail.substring(0,20);
        }
        detail.setText(productionDetail);

        linear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //Toast.makeText(context,"点击了查看详情按钮！",Toast.LENGTH_LONG).show();
                Bundle datas = new Bundle();
                datas.putInt("img",production.getImgId());
                datas.putString("name",production.getProductionName());
                datas.putString("details",production.getProductionDetail());
                datas.putDouble("price",production.getProductionPrice());
                Intent intent = new Intent(context,DetailsActivity.class);
                intent.putExtras(datas);
                context.startActivity(intent);
            }
        });
        return view;
    }
}

Activity

ListViewActivity

package com.huanggf.mylistview;

import android.os.Bundle;
import android.widget.ListView;

import androidx.appcompat.app.AppCompatActivity;

import com.huanggf.mylistview.entity.Production;

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

public class ListViewActivity extends AppCompatActivity {

    private ListView listView;
    //数据
    private int[] imgIds = {R.drawable.modao,R.drawable.zhafan,R.drawable.tianguan};
    private String[] productionNames = {"《魔道祖师》","《伪装学渣》","《天官赐福》"};
    private Double[] productionPrices = {55.0,45.5,60.0};
    private String[] productionDetails = {"【正版现货】全3册套装 撒野1+2再版重贩+3完结篇 全集全册 晋江大神级作者巫哲代表作 狼行成双格格不入 晋江纯爱小说青春文学",
            "正版伪装学渣1+2全套共两册完结篇赠逢考必过书签+明信片+对白卡",
            "新版天官赐福全套四本番外+明信片+画册天宫赐福"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_view);

        listView = (ListView) findViewById(R.id.listView);
        //构造数据
        List<Production> productionList = new ArrayList<>();
        for (int i=0; i<imgIds.length; i++){
            Production production = new Production();
            production.setImgId(imgIds[i]);
            production.setProductionName(productionNames[i]);
            production.setProductionPrice(productionPrices[i]);
            production.setProductionDetail(productionDetails[i]);
            productionList.add(production);
        }
        //初始化

        MyAdapter myAdapter = new MyAdapter(productionList,this);
        listView.setAdapter(myAdapter);
    }
}

DetailsActivity

代码

package com.huanggf.mylistview;

import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class DetailsActivity extends AppCompatActivity {
    private ImageView img;
    private TextView name,details,price;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.details);

        img = (ImageView) findViewById(R.id.img);
        name = (TextView) findViewById(R.id.name);
        details = (TextView) findViewById(R.id.details);
        price = (TextView) findViewById(R.id.price);

        //获取数据
        Bundle datas = this.getIntent().getExtras();
        img.setImageResource((datas.getInt("img")));
        name.setText(datas.getString("name"));
        details.setText(datas.getString("details"));
        price.setText(String.valueOf(datas.getDouble("price")));

    }
}

运行结果

使用listview和adapter显示数据使用listview和adapter显示数据

用到的背景效果

shape.xml

代码

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape android:shape="rectangle" >
            <solid android:color="#FFFFFF" />
            <corners android:radius="13dp"/>
        </shape>
    </item>
</layer-list>

shape1.xml

代码

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape android:shape="rectangle" >
            <solid android:color="#FE9A2E" />
            <corners android:radius="13dp"/>
        </shape>
    </item>
</layer-list>

注：添加购物车功能未做

本文地址：https://blog.csdn.net/drawababy/article/details/107567568

相关标签： listview android android studio

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