android ListView使用

package dbOpenHelper;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by Administrator on 2014/8/25.
 */
public class DbOpenHelper extends SQLiteOpenHelper {

    public DbOpenHelper(Context context)
    {
        //Context 上下文
        //name 数据库名
        //CursorFactory 游标工厂模式 当为null时 使用默认值
        //version 数据库版本 版本号从1开始
        super(context, "person.db", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        //create table person(id integer primary key autoincrement,name varchar(20),age int,phone varchar(11))
        String sql = "create table person(id integer primary key autoincrement,name varchar(20),int age,phone varchar(11))";
        db.execSQL(sql);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    }
}

package domain;

/**
 * Created by Administrator on 2014/8/25.
 */
public class Person {
    private int id;
    private String name;
    private int age;
    private String phone;

    public Person(){}

    public Person(int id, String name, int age, String phone) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.phone = phone;
    }

    public Person(int id, String name, String phone) {
        this.id = id;
        this.name = name;
        this.phone = phone;
    }

    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 int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    @Override
    public String toString() {
        return "个人信息{" +
                "id=" + id +
                ", name=‘" + name + ‘\‘‘ +
                ", age=" + age +
                ", phone=‘" + phone + ‘\‘‘ +
                ‘}‘;
    }
}

package dao;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import dbOpenHelper.DbOpenHelper;
import domain.Person;

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

/**
 * Created by Administrator on 2014/8/25.
 */
public class PersonDao {
    private DbOpenHelper helper;

    public PersonDao(Context context)
    {
        helper = new DbOpenHelper(context);
    }

    public void add(Person p)
    {
        SQLiteDatabase db = helper.getWritableDatabase();
        String sql = "insert into person(name,phone) values(?,?)";
        db.execSQL(sql,new Object[]{p.getName(),p.getPhone()});
        db.close();
    }

    public void update(Person p)
    {
        SQLiteDatabase db = helper.getWritableDatabase();
        String sql = "update person set phone=? where name=?";
        db.execSQL(sql,new Object[]{p.getPhone(),p.getName()});
        db.close();
    }

    public void delete(String name)
    {
        SQLiteDatabase db = helper.getWritableDatabase();
        String sql = "delete from person where name=?";
        db.execSQL(sql,new Object[]{name});
        db.close();
    }

    public Person findByName(String name)
    {
        SQLiteDatabase db = helper.getWritableDatabase();
        String sql = "select * from person where name=?";
        Cursor cursor = db.rawQuery(sql,new String[]{name});
        Person p = null;
        while(cursor.moveToFirst())
        {
            int id = cursor.getInt(cursor.getColumnIndex("id"));
            String phone = cursor.getString(cursor.getColumnIndex("phone"));
            p = new Person(id,name,phone);
        }
        db.close();
        return p;
    }

    public List<Person> findAll()
    {
        SQLiteDatabase db = helper.getWritableDatabase();
        String sql = "select * from person";
        Cursor cursor = db.rawQuery(sql,null);
        List<Person> list = new ArrayList<Person>();
        while(cursor.moveToNext())
        {
            int id = cursor.getInt(cursor.getColumnIndex("id"));
            String name = cursor.getString(cursor.getColumnIndex("name"));
            String phone = cursor.getString(cursor.getColumnIndex("phone"));
            Person p = new Person(id,name,phone);
            list.add(p);
        }
        db.close();
        return list;
    }

}

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="horizontal"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">

    <TextView
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:text="@string/id"
            android:id="@+id/tv_id"
            />
    <TextView
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:text="@string/name"
            android:id="@+id/tv_name"
            />
    <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/phone"
            android:id="@+id/tv_phone"
            />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">
    <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
        <TextView
                android:layout_width="120dp"
                android:layout_height="wrap_content"
                android:text="@string/id"
                />
        <TextView
                android:layout_width="120dp"
                android:layout_height="wrap_content"
                android:text="@string/name"
                />
        <TextView
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:text="@string/phone"
                />
    </LinearLayout>

   <ListView
           android:layout_width="fill_parent"
           android:layout_height="fill_parent"
           android:id="@+id/list"
           />

</LinearLayout>