安卓GreenDao基本使用

配置参考github官方https://github.com/greenrobot/greenDAO

不过发现配置似乎需要翻墙

首先在build.gradle

repositories {google()jcenter()mavenCentral() // add repository}

classpath 'org.greenrobot:greendao-gradle-plugin:3.3.0'

在build.gradle(app中)上部

apply plugin: 'org.greenrobot.greendao'

添加依赖

implementation 'org.greenrobot:greendao:3.3.0' // add library

 在BaseApplication中的初始化

public class BaseApplication extends Application {private static Context sCOntext= null;private static Handler sHandler = null;private DaoMaster.DevOpenHelper mDevOpenHelper;private DaoMaster mDaoMaster;private DaoSession mDaoSession;private SQLiteDatabase mDb;private static BaseApplication sApplication;@Overridepublic void onCreate() {super.onCreate();sApplication = this;sCOntext= getBaseContext();sHandler = new Handler();initData();}public static BaseApplication getInstance(){return sApplication;}private void initData() {mDevOpenHelper = new DaoMaster.DevOpenHelper(this,"test-db",null);mDb = mDevOpenHelper.getWritableDatabase();mDaoMaster = new DaoMaster(mDb);mDaoSession = mDaoMaster.newSession();}public DaoSession getDaoSession(){return mDaoSession;}public SQLiteDatabase getDb() {return mDb;}public static Context getContext() {return sContext;}public static Handler getHandler() {return sHandler;}
}

android:name=".base.BaseApplication"

创建实体类

@Entity
public class GreenDaoItem {@Idprivate Long id;@Indexprivate String perNo;@Property(nameInDb = "USERNAME")private String name;@Property(nameInDb = "SEX")private String sex;
}

然后点击rebuild Project就可以自动补全实体类中的构造方法和getter,setter

@Entity
public class GreenDaoItem {@Idprivate Long id;@Indexprivate String perNo;@Property(nameInDb = "USERNAME")private String name;@Property(nameInDb = "SEX")private String sex;@Generated(hash = 246239292)public GreenDaoItem(Long id, String perNo, String name, String sex) {this.id = id;this.perNo = perNo;this.name = name;this.sex = sex;}@Generated(hash = 922739932)public GreenDaoItem() {}public Long getId() {return this.id;}public void setId(Long id) {this.id = id;}public String getPerNo() {return this.perNo;}public void setPerNo(String perNo) {this.perNo = perNo;}public String getName() {return this.name;}public void setName(String name) {this.name = name;}public String getSex() {return this.sex;}public void setSex(String sex) {this.sex = sex;}
}

在代码中调用

mGreenDaoItemDao = BaseApplication.getInstance().getDaoSession().getGreenDaoItemDao();

有四个按钮用来增删查改

@Overridepublic void onClick(View view) {switch (view.getId()) {case R.id.insert_fg_more:final GreenDaoItem greenDaoItem = new GreenDaoItem(101l, "123", "Tom", "男");mGreenDaoItemDao.insertOrReplace(greenDaoItem);final GreenDaoItem greenDaoItem2 = new GreenDaoItem(102l, "124", "123", "女");mGreenDaoItemDao.insertOrReplace(greenDaoItem2);break;case R.id.delete_fg_more:mGreenDaoItemDao.deleteByKey(102l);break;case R.id.update_fg_more:final GreenDaoItem greenDaoItem1 = new GreenDaoItem(102l, "1234", "1235", "1235");mGreenDaoItemDao.update(greenDaoItem1);break;case R.id.query_fg_more:List greenDaoItems = mGreenDaoItemDao.loadAll();for (GreenDaoItem daoItem : greenDaoItems) {Log.e(TAG, "onClick: "+daoItem.getId() +" "+ daoItem.getPerNo() );}break;}}