package com.wuyudong.db.domain;public class Person {private int id;private String name;private String number;public Person() {}public Person(int id, String name, String number) {this.id = id;this.name = name;this.number = number;}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 getNumber() {return number;}public void setNumber(String number) {this.number = number;}}

package com.wuyudong.db.dao;import java.util.ArrayList;
import java.util.List;import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;import com.wuyudong.db.PersonSQLiteOpenHelper;
import com.wuyudong.db.domain.Person;public class PersonDao {private PersonSQLiteOpenHelper helper;public PersonDao(Context context) {helper = new PersonSQLiteOpenHelper(context);}/*** 添加一条记录到数据库* * @param name*            姓名* @param number*            电话*/public void add(String name, String number) {SQLiteDatabase db = helper.getWritableDatabase();db.execSQL("insert into person (name,number) values (?,?)",new Object[] { name, number });db.close();}/*** 查询记录是否存在* * @param name*            姓名 return true存在， false不存在*/public boolean find(String name) {SQLiteDatabase db = helper.getReadableDatabase();Cursor cursor = db.rawQuery("select * from person where name=?",new String[] { name });boolean result = cursor.moveToNext();cursor.close();db.close();return result;}/*** * @param name*            要修改的人的姓名* @param newnumber*            新的号码*/public void update(String name, String newnumber) {SQLiteDatabase db = helper.getReadableDatabase();db.execSQL("update person set number=? where name=?", new Object[]{newnumber,name});db.close();}/*** 删除一条记录* @param name */public void delete(String name) {SQLiteDatabase db = helper.getReadableDatabase();db.execSQL("delete from person where name=?", new Object[]{name});db.close();}/*** 返回全部的数据库信息* @return*/public List<Person> findAll() {List<Person> persons = new ArrayList<Person>();SQLiteDatabase db = helper.getReadableDatabase();Cursor cursor = db.rawQuery("select * from person", null);while(cursor.moveToNext()){int id = cursor.getInt(cursor.getColumnIndex("id"));String name = cursor.getString(cursor.getColumnIndex("name"));String number = cursor.getString(cursor.getColumnIndex("number"));Person person = new Person(id, name, number);persons.add(person);}cursor.close();db.close();return persons;}}

package com.wuyudong.db.test;import java.util.List;import com.wuyudong.db.PersonSQLiteOpenHelper;
import com.wuyudong.db.dao.PersonDao;
import com.wuyudong.db.domain.Person;import android.database.sqlite.SQLiteDatabase;
import android.test.AndroidTestCase;public class TestPersonDB extends AndroidTestCase {public void testCreateDB() throws Exception {PersonSQLiteOpenHelper helper = new PersonSQLiteOpenHelper(getContext());SQLiteDatabase db = helper.getWritableDatabase();}public void testAdd() throws Exception {PersonDao dao = new PersonDao(getContext());dao.add("wuyudong", "666");}public void testFind() throws Exception {PersonDao dao = new PersonDao(getContext());boolean result = dao.find("zhangsan");assertEquals(true, result);}public void testUpdate() throws Exception {PersonDao dao = new PersonDao(getContext());dao.update("zhangsan", "655");}public void testDelete() throws Exception {PersonDao dao = new PersonDao(getContext());dao.delete("zhangsan");}public void testFindall() throws Exception {PersonDao dao = new PersonDao(getContext());List<Person> persons = dao.findAll();for (Person person : persons) {System.out.println(person.toString());}}
}