ObjectBox For Kotlin

1.Gradle配置

buildscript {

 ext.objectboxVersion ='2.2.0'

        dependencies { 

             classpath"io.objectbox:objectbox-gradle-plugin:$objectboxVersion"

        }

}

2.

dependencies { 

 debugImplementation"io.objectbox:objectbox-android-objectbrowser:$objectboxVersion"

releaseImplementation"io.objectbox:objectbox-android:$objectboxVersion"

}

apply plugin:'io.objectbox'

// 注意下面的内容放到 dependencies 语句块的后面apply plugin:'io.objectbox'

3.//数据库统一操作管理类初始化

DataManager.getInstance().init(this)

4.实体类

import io.objectbox.annotation.Entity

import io.objectbox.annotation.Id

@Entity

class UserInfo {

/**

* actionType : 2

* birthday : 2008-06-13 00:00:00

* email : lupeibo@qq.com

* id : 1

* loginId : 12

* nickname : 陆晓亮

* phone : 18680503648

* platform : 2

* recommendCode : 217823

* sex : 1

* storeId : 2111

* token : 318c84c1594e49c49a586ba5ab8edd18

* userHeadPic : /pic/udu1232.png

* userLevel : 1

* username : 陆培波

*/

    var actionType: Int =1

    var birthday: String? =null

    var email: String? =null

    @Id(assignable = true)

    var id: Long =1

    var loginId: String? =null

    var nickname: String? =null

    var phone: String? =null

    var platform: Int =2

    var recommendCode: String? =null

    var sex: Int =0

    var storeId: Int =0

    var token: String? =null

    var userHeadPic: String? =null

    var userLevel: Int =0

    var username: String? =null

    constructor(actionType: Int, birthday: String?, email: String?, id: Long, loginId: String?, nickname: String?, phone: String?, platform: Int, recommendCode: String?, sex: Int, storeId: Int, token: String?, userHeadPic: String?, userLevel: Int, username: String?) {

this.actionType = actionType

this.birthday = birthday

this.email = email

this.id = id

this.loginId = loginId

this.nickname = nickname

this.phone = phone

this.platform = platform

this.recommendCode = recommendCode

this.sex = sex

this.storeId = storeId

this.token = token

this.userHeadPic = userHeadPic

this.userLevel = userLevel

this.username = username

}

constructor()

}

5.

/**

* 数据库操作统一管理类

*/

public  class DataManager {

private static DataManager dataManager;

public static synchronized DataManager getInstance() {

if (dataManager ==null) {

dataManager =new DataManager();

}

return dataManager;

}

public BoxStore boxStore;

public Box userInfoBox;

public void init(BaseApplication baseApplication) {

boxStore = MyObjectBox.builder().androidContext(baseApplication).build();

initUserInfoBox();

}

private void initUserInfoBox() {

//对应操作对应表的类

        userInfoBox = boxStore.boxFor(UserInfo.class);

}

public void insertUserInfo(UserInfo userInfo) {

userInfoBox.removeAll();

userInfoBox.put(userInfo);

}

public void clearUserInfo() {

userInfoBox.removeAll();

}

public UserInfo queryUserInfo(){

return userInfoBox.query().build().findUnique();

}

}

相关文章：https://www.jianshu.com/p/e4ebaa433ae7