一、配置Gradle Scripts：
1.1、build.gradle(Project:*****)
buildscript {
repositories {
google()
jcenter()
mavenCentral() // add repository
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.1'//3.3.2 会告警
classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2' // add plugin
}
}
1.2、build.gradle(Module:app)
apply plugin: 'com.android.application'
apply plugin: 'org.greenrobot.greendao' // apply plugin greendao {
schemaVersion //数据库版本号
daoPackage 'com.trysqlite.greenDAO' // 设置包名（这里自己定义一下你的命名空间位置）
targetGenDir 'src/main/java' //设置 生成代码位置
generateTests false //设置为true以自动生成单元测试。
// targetGenDirTests 'src/main/java' //应存储生成的单元测试的基本目录。默认为 src / androidTest / java。
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'org.greenrobot:greendao:3.2.2'
implementation 'org.greenrobot:greendao-generator:3.0.0'
}
二、创建存储对象类（记住要@Entity，这样才会被构建相对应的操作类）：
@Entity
public class teacher {
@Id(autoincrement = true)
Long id;
@Property(nameInDb = "name") //设置了，数据库中的表格属性名为"name",如果不设置，数据库中表格属性名为"NAME"
private String name;
}
三、菜单栏选择Build->Make Project
这里将生成：
- DaoMaster：使用GreenDAO的入口点
- DaoSession：管理特定架构的所有可用DAO对象：说白了就是增删查改数据库操作
- teacherDao：数据访问对象(第二部写的实体类)
四、新建一个继承Application的类，对GreenDao进行初始化
public class MyApplication extends Application {
private static DaoSession daoSession;
@Override
public void onCreate() {
super.onCreate(); //进入程序时初始化数据库
settupDatabase();
}
private void settupDatabase() {
//创建数据库
DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this, "its_android.db", null);
//获取可写数据库
SQLiteDatabase db = helper.getWritableDatabase();
//获取数据库对象
DaoMaster daoMaster = new DaoMaster(db);
//获取Dao对象管理者
daoSession = daoMaster.newSession();
}
public static DaoSession getDaoInstant() {
return daoSession;
}
}
五、做个预处理好的DBHelper
public class DBHelper {
static DaoSession daoSession = app.getDaoInstant();
//增
public void Addteacher(teacher teacher) {
daoSession.getTeacherDao().insert(teacher);
}
//删
public void Deleteteacher(teacher teacher) {
daoSession.getTeacherDao().delete(teacher);
}
//查
public List<teacher> Queryteacher(teacher teacher) {
QueryBuilder<teacher> qb = daoSession.queryBuilder(teacher.class);
QueryBuilder<teacher> teacherQueryBuilder = qb.where(teacherDao.Properties.Name.eq("一")).orderAsc(teacherDao.Properties.Name);
List<teacher> teacherList = teacherQueryBuilder.list(); //查出当前对应的数据
return teacherList;
}
//改
public void Updateteacher(teacher teacher) {
daoSession.getTeacherDao().update(teacher);
}
}