greenDAO 使用初体验

package com.example.application;

import com.example.db.DaoMaster;
import com.example.db.DaoSession;
import com.example.db.DaoMaster.DevOpenHelper;

import android.app.Application;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;

public class BaseApplication extends Application {

private static BaseApplication mInstance;
private static final String DB_NAME = "pp-dbs";
private static DaoMaster mDaoMaster;
private static DaoSession mDaoSession;

@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
if (mInstance == null)
mInstance = this;
}

public static DaoMaster getDaoMaster(Context context) {
if (mDaoMaster == null) {
DevOpenHelper openHelper = new DevOpenHelper(context, DB_NAME, null);
SQLiteDatabase db = openHelper.getWritableDatabase();
mDaoMaster = new DaoMaster(db);
}
return mDaoMaster;
};

public static DaoSession getDaoSession(Context context) {
if (mDaoSession == null) {
if (mDaoMaster == null) {
getDaoMaster(context);
}
mDaoSession = mDaoMaster.newSession();

}
return mDaoSession;
}
}

9：数据操作工具类;
package com.example.db;

import java.util.List;

import com.example.application.BaseApplication;

import android.content.Context;

public class DbService {

private final String TAG = DbService. class .getSimpleName();
private static DbService mInstance;
private static Context mContext;
private DaoSession mDaoSession ;
public PersonDao mPersonDao ;

private DbService() {
}

public static DbService getInstance(Context context) {

if (mInstance == null) {
mInstance = new DbService();
if (mContext == null) {
mContext = context.getApplicationContext();
}
mInstance .mDaoSession = BaseApplication.getDaoSession(context);
mInstance .mPersonDao = mInstance .mDaoSession .getPersonDao();
}
return mInstance ;
}

/**
* 获取所有数据
*
* @return
*/
public List<Person> getAllPerson() {

return mPersonDao .loadAll();
}

/**
* 插入数据
*
* @param pp
* @return
*/
public   long savePerson(Person pp) {
return mPersonDao .insert(pp);
}

/**
* 删除数据
*
* @param pp
*/
public void deletePerson(Person pp) {
mPersonDao .delete(pp);
}

public void deletePersonDetail( long id){

mPersonDao .deleteByKey(id);
}

public void deleteAllData(){
mPersonDao .deleteAll();
}
/**
* 更新数据
*
* @param pp
*/
public void updatePerson(Person pp) {

mPersonDao .update(pp);
}

/**
* 根据id 获取数据
*
* @param id
* @return
*/
public Person loadPeron( long id) {
return mPersonDao .load(id);
}

/**
* 根据条件查询
*/

public List<Person> queryPerson(String where, String... params) {

return mPersonDao .queryRaw(where, params);
}
}
10:测试
package com.example.grendaotest;

import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import com.example.db.DaoMaster;
import com.example.db.DaoSession;
import com.example.db.DaoMaster.DevOpenHelper;
import com.example.db.DbService;
import com.example.db.Person;
import com.example.db.PersonDao;
import com.example.db.PersonDao.Properties;

import android.os.Bundle;
import android.app.Activity;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
import android.view.Menu;

public class MainActivity extends Activity {

DbService mDbService;
private final String TAG = MainActivity.class.getSimpleName();

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDbService = DbService.getInstance(this);

// Log.e(TAG, "已经插入数据个数：" + createPersonData().size());
mDbService.deleteAllData();
createPersonData();
//          deletePer();
getDataWhere() ;
}

/**
* 删除年龄为100的person
*/
public void deletePer() {
for (Iterator<Person> oo = getData().iterator(); oo.hasNext();) {
Person pp = oo.next();
if (pp.getAge().equals("100")) {
mDbService.deletePerson(pp);

}
}
getData();
}

public List<Person> createPersonData() {
for (int i = 0; i < 10; i++) {
Person p = new Person();
p.setAge(99 + i + "");
p.setColor("红色"+i);
p.setDate(new Date());
p.setName("张三" + i);
mDbService.savePerson(p);
}
getData();
return mDbService.getAllPerson();
}

private List<Person> getDataWhere() {

System.out.println("**********************************************");
List<Person> dataperson;

dataperson = (List<Person>) mDbService.mPersonDao.queryBuilder().where(
Properties.Age.between("100", "105"),Properties.Color.eq("红色3")).list();
for (int i = 0; i < dataperson.size(); i++) {
Log.e(TAG, dataperson.get(i).getAge());
}
System.out.println("**********************************************");
return dataperson;
}

private List<Person> getData() {
System.out.println("一共有" + mDbService.getAllPerson().size() + "条数据");
for (Iterator<Person> ii = mDbService.getAllPerson().iterator(); ii
.hasNext();) {
Log.e(TAG, "年龄=" + "\n" + ii.next().getAge());
}
return mDbService.getAllPerson();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}