activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.prace3.MainActivity">
<ListView
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="wrap_content"></ListView>
</LinearLayout>
item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/img"
android:src="@mipmap/ic_launcher"
android:layout_marginLeft="15dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/text"
android:text="demo"
android:textSize="20sp"
android:textColor="#f0f"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
MainActivity.java
package com.example.prace3;
import android.app.Activity;
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 Activity implements AdapterView.OnItemClickListener{
private ListView lv;
private SimpleAdapter sim_Adapter;
private List<Map<String,Object>> dataList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化控件
lv = findViewById(R.id.lv);
dataList = new ArrayList<Map<String, Object>>();
//适配器加载数据源
sim_Adapter = new SimpleAdapter(this,getData(),R.layout.item,new String[]{"img","text"},new int[]{R.id.img,R.id.text});
/* 参数解析
SimpleAdapter(context,data,resource,from,to);
context:上下文
data:数据源(List<? extends Map<String,?>> data)一个map组成的集合;
每一个Map都会去对应ListView列表的每一行;
每一个Map中的键必须包含在所有form中指定的键
resource:列表项的布局文件ID
from:Map的键名
to:绑定视图的ID,与from成对应关系
*/
//视图加载器
lv.setAdapter(sim_Adapter);lv.setOnItemClickListener(this);
}
private List<Map<String,Object>> getData(){
for (int i=0;i<20;i++){
Map<String,Object> map = new HashMap<String,Object>();
map.put("img",R.mipmap.ic_launcher);
map.put("text","列表项"+i);
dataList.add(map);
}
return dataList;
};
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String text = lv.getItemAtPosition(position)+"";
Toast.makeText(MainActivity.this,"position"+position+" text"+text,Toast.LENGTH_SHORT).show();
}
}