008_01_SimpleAdapter的用法

封装数据

package com.example.bean;

 
public class UserPhone {

     private int id ;
     private String name;
     private String telephone;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getTelephone() {
        return telephone;
    }
    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }
    @Override
    public String toString() {
        return "UserPhone [id=" + id + ", name=" + name + ", telephone="
                + telephone + "]";
    }
    public UserPhone(int id, String name, String telephone) {
        super();
        this.id = id;
        this.name = name;
        this.telephone = telephone;
    }
    public UserPhone() {
        super();

    }     
}

创建数据库及tables

package com.example.day08_adapter;

import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class MydbOpenHelper extends SQLiteOpenHelper {

    public MydbOpenHelper(Context context, String name, CursorFactory factory,
            int version) {
        super(context, name, factory, version);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String createtable = "create table userphone(id int, name varchar(20), telephone char(11))";
        db.execSQL(createtable);
        
        ContentValues c = new ContentValues();
        for(int i=1; i<50; i++){
            c.put("id", i);
            c.put("name", "user" + i);
            if(i<10)
                c.put("telephone", "1800000000" + i);
            else{
                c.put("telephone", "1811111111" + i);
            }
            db.insert("userphone", null, c);
        }
        System.out.println("MydbOpenHelper.onCreate()");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.i("MydbOpenHelper", "oldervserion"+oldVersion+"newversion"+newVersion);
        System.out.println("MydbOpenHelper.onUpgrade()");
    }
}

package com.example.day08_adapter;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.example.bean.UserPhone;

import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {
    
    List<UserPhone> list = new ArrayList<UserPhone>();
    UserPhone userPhone;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        MydbOpenHelper helper = new MydbOpenHelper(this, "telephone.db", null, 1);
        SQLiteDatabase db = helper.getReadableDatabase();
        Cursor c = db.rawQuery("select * from userphone", null);
        
        while (c.moveToNext()){
            int id = c.getInt(0);
            String name = c.getString(1);
            String telephone = c.getString(2);
            
            Log.i("test", id + "," + name + "," + telephone);
            userPhone = new UserPhone(id, name, telephone);
            list.add(userPhone);
            }
        db.close();
        
        ListView listView = (ListView) findViewById(R.id.listview);
        
        List<Map<String, Object>> data = new ArrayList<Map<String, Object>>();
        
        Map<String, Object> map1 = new HashMap<String, Object>();
        map1.put("header", R.drawable.a);
        map1.put("name", "zhangsan");
        data.add(map1);
        
        Map<String, Object> map2 = new HashMap<String, Object>();
        map2.put("header", R.drawable.b);
        map2.put("name", "lisi");
        data.add(map2);
        
        Map<String, Object> map3 = new HashMap<String, Object>();
        map3.put("header", R.drawable.c);
        map3.put("name", "wangwu");
        data.add(map3);
        
        Map<String, Object> map4 = new HashMap<String, Object>();
        map4.put("header", R.drawable.d);
        map4.put("name", "zhaoliu");
        data.add(map4);
        
        Map<String, Object> map5 = new HashMap<String, Object>();
        map5.put("header", R.drawable.e);
        map5.put("name", "jiangfeng");
        data.add(map5);
        
        Map<String, Object> map6 = new HashMap<String, Object>();
        map6.put("header", R.drawable.f);
        map6.put("name", "xiongda");
        data.add(map6);
        
        SimpleAdapter sadapter = new SimpleAdapter(this, data, R.layout.array_adapter,
                new String[]{"header", "name"}, new int[]{R.id.iv_header, R.id.tv_name});
        
        listView.setAdapter(sadapter);
        }
}

activity_main.xml

<LinearLayout 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="com.example.day08_adapter.MainActivity" 
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
<!--     <ScrollView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
         <LinearLayout
        android:id="@+id/linearlayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        ></LinearLayout>        
    </ScrollView> -->
    
    <ListView 
        android:id="@+id/listview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:dividerHeight="5dp"
        ></ListView>
   
</LinearLayout>

array_adapter.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="horizontal" >
    
    <ImageView 
          android:id="@+id/iv_header"
          android:layout_width="50dp"
          android:layout_height="50dp"
        />
    <TextView 
          android:id="@+id/tv_name"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
        />
    
    
</LinearLayout>

效果图：