Android 简单适配器(SimpleAdapter)

1.介绍

2.简单适配器的实现方法

3.XML文件

(1)主页面布局

<?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=".MainActivity">

    <ListView

        android:id="@+id/listview1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content">

    </ListView>

</LinearLayout>

(2)子项布局

<?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:layout_width="match_parent"

    android:layout_height="match_parent">

    <TextView

        android:id="@+id/textView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_weight="1"

        android:text="TextView" />

    <ImageView

        android:id="@+id/imageView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_weight="1"

        app:srcCompat="@mipmap/img01" />

</LinearLayout>

4.java后台

package com.lucky.test29simpleadapter;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.ListView;

import android.widget.SimpleAdapter;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class MainActivity extends AppCompatActivity {

    ListView listView;  //列表视图

    SimpleAdapter simpleAdapter; //简单适配器可以将图片和文件组合起来

    List<Map<String,Object>> list1;

    //Android studio工程将图片转变为的数字

    int[] images={R.mipmap.img01,R.mipmap.img02,R.mipmap.img03,R.mipmap.img04,R.mipmap.img05,R.mipmap.img06,R.mipmap.img07,R.mipmap.img08};

    String[] contentstr={"虎扑","头条","QQ","微信","百度","起点","美团","滴滴"};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        listView=findViewById(R.id.listview1);

        list1=new ArrayList<>();  //实例化list1

        for (int i = 0; i <images.length ; i++) {

            Map<String,Object> map=new HashMap<>();  //实例化map

            map.put("001",images[i]);   //给map添加值，参数1为代号，参数2为数据值

            map.put("002",contentstr[i]);

            list1.add(map);

        }

        //实例化simpleAdapter，并设置参数，参数2为数据，参数3为子项的布局文件，参数4为数据的代号，参数5为组件的id

        simpleAdapter=new SimpleAdapter(MainActivity.this,list1,R.layout.itemsimple,new String[]{"001","002"},new int[]{R.id.imageView,R.id.textView});

        listView.setAdapter(simpleAdapter); //设置适配器

    }

}

5.效果图