Well known database framework

Steps to use GreenDao:

1. Add dependency to build.gradle file in app directory

compile 'org.greenrobot:greendao:3.2.0'

Add plug-in at the top

apply plugin: 'org.greenrobot.greendao'

2. Configuration of build.gradle file in root directory

  dependencies {

        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1'
    }

3. The build.gradle file in the app directory configures the generated file of the generator

 greendao {
        schemaVersion 1//Database version number
        daoPackage 'com.xxx.xxx.base.database'//Set up DaoMaster,DaoSession,Dao Package name
        targetGenDir 'src/main/java'//Set up DaoMaster,DaoSession,Dao Catalog
        //targetGenDirTest: Set build unit test directory
        //generateTests: Set up automatic generation of unit test cases
    }
dependencies{}

4. Create entity class and generate dao file

@Entity
public class HX_User {
    @Id
    private String id;
    private String userName;
    private String avatar;
}

5,make project

6. Testing

The HX_User class will change to the following situation. Note that the get and set methods of property values should not be written by yourself. They are generated automatically after make project

@Entity
public class HX_User {
    @Id
    private String id;
    private String userName;
    private String avatar;
    @Generated(hash = 546596795)
    public HX_User(String id, String userName, String avatar) {
        this.id = id;
        this.userName = userName;
        this.avatar = avatar;
    }
    @Generated(hash = 1952360032)
    public HX_User() {
    }
    public String getId() {
        return this.id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getUserName() {
        return this.userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getAvatar() {
        return this.avatar;
    }
    public void setAvatar(String avatar) {
        this.avatar = avatar;
    }
}

7. Using: initialization

Initialize in your own Application class

public class XApplication extends Application{

    private static DaoSession mDaoSession;

    @Override
    public void onCreate() {
        super.onCreate();

        // Initialize database
        setupDataBase(this);

    }

    private void setupDataBase(Context context){
        DaoMaster.DevOpenHelper openHelper = new DaoMaster.DevOpenHelper(context,"HX_DB");
        Database db = openHelper.getWritableDb();
        DaoMaster daoMaster = new DaoMaster(db);
        mDaoSession = daoMaster.newSession();
    }

    public static DaoSession getDaoSession(){
        return mDaoSession;
    }

}

8. Use: add, delete, modify and query

XApplication.getDaoSession().getHX_UserDao().insertOrReplace(currentUser);

XApplication.getDaoSession().getHX_UserDao().delete(currentUser);

XApplication.getDaoSession().getHX_UserDao().update(currentUser);

List<HX_User> list = XApplication.getDaoSession().getHX_UserDao().queryBuilder().where(HX_UserDao.Properties.Id.eq(uid)).list();