废话就不多说了，开始。。。

1、Person

package com.njupt.sqlite;public class Person {private Integer id;private String name;private Integer balance;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getBalance() {return balance;}public void setBalance(Integer balance) {this.balance = balance;}@Overridepublic String toString() {return "Person [id=" + id + ", name=" + name + ", balance=" + balance+ "]";}public Person(Integer id, String name, Integer balance) {super();this.id = id;this.name = name;this.balance = balance;}public Person() {super();}}

2、PersonDao

package com.njupt.sqlite;import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;public class PersonDao {private DBOpenHelper helper;public PersonDao(Context context){helper = new DBOpenHelper(context);}public void insert(Person p){SQLiteDatabase db = helper.getWritableDatabase();db.execSQL("insert into person1(name,balance) values(?,?)",new Object[]{p.getName(),p.getBalance()});db.close();}public void delete(int id){SQLiteDatabase db = helper.getWritableDatabase();db.execSQL("delete from person1 where id = ?",new Object[]{id});db.close();}public void update(Person p){SQLiteDatabase db = helper.getWritableDatabase();db.execSQL("update person1 set name = ? , balance = ? where id = ?", new Object[]{p.getName(),p.getBalance(),p.getId()});db.close();}public Person query(int id){SQLiteDatabase db = helper.getReadableDatabase();Cursor c = db.rawQuery("select name ,balance from person1 where id = ?", new String[]{id + ""});Person p = null;if(c.moveToNext()){String name = c.getString(0);int balance = c.getInt(1);p = new Person(id,name,balance);}return p;}}

3、DBTest

以下附上测试类

package com.njupt.sqlite;import android.test.AndroidTestCase;public class DBTest extends AndroidTestCase{public void test1(){DBOpenHelper helper = new DBOpenHelper(getContext());helper.getWritableDatabase();}public void testInsert(){PersonDao dao = new PersonDao(getContext());Person p = new Person(3,"章泽天",45000);dao.insert(p);}public void testDelete(){PersonDao dao = new PersonDao(getContext());int id = 1;dao.delete(id);}public void testUpdate(){PersonDao dao = new PersonDao(getContext());Person p = new Person(2,"lss",40000);dao.update(p);}public void testQuery(){PersonDao dao = new PersonDao(getContext());Person p = dao.query(3);System.out.println(p);}
}

4、最后我们可以在SQLiteExpert中看到响应的变化

文章结束给大家分享下程序员的一些笑话语录： 人脑与电脑的相同点和不同点，人脑会记忆数字，电脑也会记忆数字；人脑会记忆程序，电脑也会记忆程序，但是人脑具有感知能力，这种能力电脑无法模仿，人的记忆会影响到人做任何事情，但是电脑只有程序软件。比尔还表示，人脑与电脑之间最重要的一个差别就是潜意识。对于人脑存储记忆的特别之处，比尔表示，人脑并不大，但是人脑重要的功能是联络，人脑会把同样的记忆存储在不同的地方，因此记忆读取的速度就不相同，而这种速度取决于使用的频率和知识的重要性。人脑的记忆存储能力会随着年龄增长而退化，同时记忆的质量也会随着年龄退化。经典语录网

--------------------------------- 原创文章 By
crud和android
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