greenDAO 官方替换数据库框架ObjectBox 学习 写记录1

greenDAO: Android ORM for your SQLite database

Note: for new apps we recommend ObjectBox, a new object-oriented database that is much faster than SQLite and easier to use. For existing apps based on greenDAO we offer DaoCompat for an easy switch (see also the announcement).

1.上代码（项目跟目录脚本）

 // Top-level build file where you can add configuration options common to all sub-projects/modules.apply plugin: 'java'apply plugin: 'io.objectbox'buildscript {//    ext.objectboxVersion = '1.2.1'    repositories {        jcenter()        maven { url "http://objectbox.net/beta-repo/" }    }    dependencies {        classpath 'com.android.tools.build:gradle:2.2.0'        classpath "io.objectbox:objectbox-gradle-plugin:1.2.1"        // NOTE: Do not place your application dependencies here; they belong        // in the individual module build.gradle files    }}allprojects {    repositories {        jcenter()        maven { url "http://objectbox.net/beta-repo/" }    }}task clean(type: Delete) {    delete rootProject.buildDir}

2.APP 目录的

apply plugin: 'com.android.application'android {    compileSdkVersion 26    buildToolsVersion "26.0.2"    defaultConfig {        applicationId "com.org.gsc.opengldemo"        minSdkVersion 15        targetSdkVersion 26        versionCode 1        versionName "1.0"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'        }    }    configurations.all {        resolutionStrategy.force 'com.google.code.findbugs:jsr305:1.3.9'    }}dependencies {    compile fileTree(dir: 'libs', include: ['*.jar'])    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {        exclude group: 'com.android.support', module: 'support-annotations'    })    // all below should be added automatically by the plugin    compile "io.objectbox:objectbox-android:1.2.1"    // some useful Kotlin extension functions    // compile "io.objectbox:objectbox-kotlin:$objectboxVersion"    annotationProcessor "io.objectbox:objectbox-processor:1.2.1"    // When using Kotlin use kapt instead:    // kapt "io.objectbox:objectbox-processor:$objectboxVersion"    compile 'com.android.support:appcompat-v7:26.0.0-alpha1'    testCompile 'junit:junit:4.12'}

3. 初始化盒子

package com.org.gsc.opengldemo;import android.app.Application;import io.objectbox.BoxStore;/** * Created by qundui on 2017/11/20. */public class MyAPP extends Application {    private BoxStore boxStore;    public BoxStore getBoxStore() {        return boxStore;    }    @Override    public void onCreate() {        super.onCreate();//        boxStore = MyObjectBox.builder().androidContext(App.this).build();       boxStore = MyObjectBox.builder().androidContext(MyAPP.this).build();//初始化ORM 盒子//// do this in your activities/fragments to get hold of a Box//        notesBox = ((MyAPP) geta).getBoxStore().boxFor(Student.class);    }}

4.act 中数据库操作

package com.org.gsc.opengldemo;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import java.util.List;import io.objectbox.Box;import io.objectbox.query.Query;public class MainActivity extends AppCompatActivity {    private Box<Student> notesBox;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        notesBox = ((MyAPP) getApplication()).getBoxStore().boxFor(Student.class);//获取Bean 模型    }    public void addData(View view){        Student student=new Student();//        student.id=0;        student.name="fdy";         notesBox.put(student);//添加        Log.d("gsc",""+student.getId());//        Student student1 = notesBox.get(8);//        System.out.println("----读取--"+student1.getName());//查询//        student1.setName("gsc");//修改//        System.out.println("----读取修改后的--"+student1.getName());        //删除//        notesBox.remove(student1);//删除        Query query = notesBox.query()                .equal(Student_.name,"fdy").build();        List<Student> persons = query.find();        for(int i=0;i<persons.size();i++){            Log.d("gsc",""+persons.get(i).getId());        }    }}
4 项目Bean 表参考

package com.org.gsc.opengldemo;import io.objectbox.annotation.Entity;import io.objectbox.annotation.Id;/** * Created by qundui on 2017/11/20. */@Entitypublic class Student {        @Id        long id;        String name;    public long getId() {        return id;    }    public void setId(long id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Override    public String toString() {        return "Student{" +                "id=" + id +                ", name='" + name + '\'' +                '}';    }}