懒人爱家务_适配器（SimpleAdapter）
上节学习了适配器ArrayAdapter，这节我们学习适配器重点SimpleAdapter
MainActivity.java
package com.example.test;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class MainActivity extends Activity {
private LinearLayout myLayout;
private ListView myListView;
//创建list对象，用来存放列表项每一行的Map信息
List<Map<String,Object>> list=new ArrayList<Map<String,Object>>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myLayout=(LinearLayout)this.findViewById(R.id.mylayout);
myListView=new ListView(this);
//创建布局参数
LinearLayout.LayoutParams myListViewParams=new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.FILL_PARENT
);
//当拖拽时显示白色，默认是黑色，这里设置白色
myListView.setCacheColorHint(Color.WHITE);
//************************
//创建SimpleAdapter对象，有5个参数
//参数1：上下文context
//参数2：数据文件
//参数3：每一行的资源布局文件，这里是自定义的列表布局文件,用到了listviewrom.xml
//参数4：含义是HashMap中key信息img，name，money，zhe
//参数5：是listViewrom.xml中的组件id
SimpleAdapter adapter=new SimpleAdapter(this,<span style="color:#FF0000;">getMyData()</span>,<span style="color:#FF0000;">R.layout.listviewrom</span>,
new String[]{"img","name","money","zhe"},new int[]{R.id.tripImg,R.id.phoneName,R.id.phoneMoney,R.id.discount});
myListView.setAdapter(adapter);//为myListView添加适配器
//将myListView添加叫流式布局myLayout中
myLayout.addView(myListView,myListViewParams);//把myListView添加到myLayout上
myListView.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0,View arg1,int position,long id) {
// TODO 自动生成的方法存根
Toast.makeText(MainActivity.this, list.get(position).get("name").toString(), Toast.LENGTH_SHORT).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public List<Map<String,Object>> getMyData(){
Map<String,Object> map=new HashMap<String,Object>();
map.put("img",R.drawable.moto);
map.put("name","摩托罗拉");
map.put("money","998");
map.put("zhe","5折");
list.add(map);
return list;
}
}
acticity_main.xml
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<LinearLayout
android:id="@+id/mylayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#FFFFF9EB">
</LinearLayout>
</RelativeLayout>
listviewrom.xml
<?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"
<span style="color:#FF0000;"> android:listSelector="@drawable/listviewbg" </span> >
<ImageView
android:id="@+id/tripImg"
android:layout_width="68px"
android:layout_height="65px"
android:layout_margin="10px"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginTop="10px"
android:layout_marginRight="10px"
android:layout_marginBottom="10px">
<TextView
android:id="@+id/phoneName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ff000000"/>
<TextView
android:id="@+id/phoneMoney"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ff000000"
android:layout_marginTop="5px"
android:layout_marginRight="20px"/>
<TextView
android:id="@+id/discount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffff0000"
android:layout_marginTop="5px"
android:layout_marginRight="20px"/>
</LinearLayout>
</LinearLayout>
listviewbg.xml
该xml文件在res下drawable文件夹下，beijing.png也是在该文件夹下，具体selector参照我转载的博客"懒人爱家务_Android中的selector的用法"，http://blog.csdn.net/qq_28711703/article/details/51184885
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true"
android:drawable="@drawable/beijing"
></item>
<item android:state_selected="true"
android:drawable="@drawable/beijing"
></item>
<item android:state_focused="true"
android:drawable="@drawable/beijing"
></item>
</selector>