Use of Android grendao database

Integration mode

1. stay app In the catalog build.gralde Integrate

apply plugin: 'com.android.application'
apply plugin: 'org.greenrobot.greendao'

dependencies {
   
    // database  greenDao
    implementation "org.greenrobot:greendao:$greendaoVersion"
 
}


greendao {
    schemaVersion 1 // Database version number 
    daoPackage 'ai.xxx.xxx.greenDao.db'
    //  Set up DaoMaster、DaoSession、Dao  Package name 
    targetGenDir 'src/main/java'// Set up DaoMaster、DaoSession、Dao Catalog , Please note that , The path here is / Do not use .
    generateTests false // Set to true To automatically generate unit tests .
    targetGenDirTests 'src/main/java' // The basic directory of the generated unit tests should be stored . The default is  src / androidTest / java.
}

2. stay project In the catalog build.gradle Integrate

 classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2'
   

3. Database creation

Can be in Application Create

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

    private void initDatabase() {
        // Create database gmtech.db"
        DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this, "mydb.db", null);
        // Get writable database 
        SQLiteDatabase db = helper.getWritableDatabase();
        // Get database objects 
        DaoMaster daoMaster = new DaoMaster(db);
        // obtain Dao Object manager 
        daoSession = daoMaster.newSession();
    }

    public static DaoSession getDaoSession() {
        return daoSession;
    }

4. Creating a data model

Create a self defined data model and then @Entity modification

@Entity
public class DeviceModel {
  
    public Long address_id;
    @Property
    public Long room_id;
    @Property
    public String region_name;
    @Property
    public String region_type;
}

  Execute after creating the model build Under the Make Project The corresponding dao file

5. Data manipulation

Generate dao File can be passed dao Object to perform database related operations