android 入门 006（sqlite增删改查）

package cn.rfvip.feb_14_2_sqlite;

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

public class MyOpenHelper extends SQLiteOpenHelper {

public MyOpenHelper(Context context, String name, CursorFactory factory,
int version) {
super(context, name, factory, version);
// TODO 自动生成的构造函数存根

}

@Override
public void onCreate(SQLiteDatabase db)
{
// TODO 自动生成的方法存根
System.out.println("创建数据库");
db.execSQL("CREATE TABLE people (_id integer PRIMARY KEY AUTOINCREMENT,name char(10),salary char(20),phone integer(20)) ");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO 自动生成的方法存根
System.out.println("更新数据库");
}

}

package cn.rfvip.feb_14_2_sqlite.UnitTest;

import cn.rfvip.feb_14_2_sqlite.MyOpenHelper;
import android.content.res.ObbInfo;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.test.AndroidTestCase;

public class UnitTest extends AndroidTestCase
{
private MyOpenHelper myOpenHelper;
private SQLiteDatabase db;

//测试之前调用
@Override
protected void setUp() throws Exception {
// TODO 自动生成的方法存根
super.setUp();
myOpenHelper=new MyOpenHelper(getContext(), "people.db", null, 2);
db = myOpenHelper.getWritableDatabase();
}

//测试之后调用
@Override
protected void tearDown() throws Exception
{
// TODO 自动生成的方法存根
super.tearDown();
db.close();
}

public  void Test()
{
myOpenHelper=new MyOpenHelper(getContext(), "people.db", null, 2);
SQLiteDatabase db=myOpenHelper.getWritableDatabase();
}

public void Insert()
{
db.execSQL("insert into people(name,salary,phone)values(?,?,?)",new Object[]{"李纯访1","15000",180178});
db.execSQL("insert into people(name,salary,phone)values(?,?,?)",new Object[]{"李纯访2","15000",180178});
db.execSQL("insert into people(name,salary,phone)values(?,?,?)",new Object[]{"李纯访3","15000",180178});
db.execSQL("insert into people(name,salary,phone)values(?,?,?)",new Object[]{"李纯访4","15000",180178});
db.execSQL("insert into people(name,salary,phone)values(?,?,?)",new Object[]{"李纯访5","15000",180178});
}

public void Delete()
{
db.execSQL("delete from people where name= ?",new Object[]{"李纯访"});
}
public void Update()
{
db.execSQL("update people set phone=? where name= ?",new Object[]{153333,"李纯访"});
}
public void Select()
{
Cursor cursor=db.rawQuery("select name,salary from people", null);
while (cursor.moveToNext())
{
String name=cursor.getString(cursor.getColumnIndex("name"));
String salary=cursor.getString(cursor.getColumnIndex("salary"));
System.out.println(name + ";" + salary);

}
}
}

// google 封装的方法
public void InsertApi() {
ContentValues values = new ContentValues();
values.put("name", "李度");
values.put("salary", "20000");
values.put("phone", "15000");
Long numberrow = db.insert("people", null, values);
System.out.println("插入的当前行数：" + numberrow);
}

public void DeleteApi() {
int numberrow = db.delete("people", "name=? and _id= ?", new String[] {
"李纯访1", "2" });
System.out.println("删除的行数：" + numberrow);
}

public void UpdateApi()
{
ContentValues values=new ContentValues();
values.put("name", "lidu");
int numberrow= db.update("people", values, "name= ? and _id= ?",new String[]{"李纯访2", "3" } );
System.out.println("更新的行数："+numberrow);
}
//columns 为null查询所有 new String[]{"name","salary"}
public void SelectApi()
{
Cursor cursor=db.query("people", null,  null, null, null, null, null);
while (cursor.moveToNext())
{
String name=cursor.getString(cursor.getColumnIndex("name"));
String salary=cursor.getString(cursor.getColumnIndex("salary"));
String phone=cursor.getString(cursor.getColumnIndex("phone"));
System.out.println("姓名为：" + name +";工资为：" + salary +";电话为：" + phone );
}
}