gradle

// In your root build.gradle file:
buildscript {
    repositories {
        jcenter()
        mavenCentral() // add repository
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.0'
        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2' // add plugin
    }
}

// In your app projects build.gradle file:
apply plugin: 'com.android.application'
apply plugin: 'org.greenrobot.greendao' // apply plugin

dependencies {
    compile 'org.greenrobot:greendao:3.2.2' // add library
}

// In the build.gradle file of your app project:
android {
...
}

greendao {
    schemaVersion 1
    daoPackage 'com.test.test.gen'
    targetGenDir 'src/main/java'
}

DaoManager

public class DaoManager {
    private static final String TAG = DaoManager.class.getSimpleName();
    private static final String DB_NAME = "greendaotest";

    private Context context;

    //多线程中要被共享的使用volatile关键字修饰
    private volatile static DaoManager manager = new DaoManager();
    private static DaoMaster sDaoMaster;
    private static DaoMaster.DevOpenHelper sHelper;
    private static DaoSession sDaoSession;

    /**
     * 单例模式获得操作数据库对象
     * @return
     */
    public static DaoManager getInstance(){
        return manager;
    }

    public void init(Context context){
        this.context = context;
    }

    /**
     * 判断是否有存在数据库，如果没有则创建
     * @return
     */
    public DaoMaster getDaoMaster(){
        if(sDaoMaster == null) {
            DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(context, DB_NAME, null);
            sDaoMaster = new DaoMaster(helper.getWritableDatabase());
        }
        return sDaoMaster;
    }

    /**
     * 完成对数据库的添加、删除、修改、查询操作，仅仅是一个接口
     * @return
     */
    public DaoSession getDaoSession(){
        if(sDaoSession == null){
            if(sDaoMaster == null){
                sDaoMaster = getDaoMaster();
            }
            sDaoSession = sDaoMaster.newSession();
        }
        return sDaoSession;
    }

    /**
     * 打开输出日志，默认关闭
     */
    public void setDebug(){
        QueryBuilder.LOG_SQL = true;
        QueryBuilder.LOG_VALUES = true;
    }

    /**
     * 关闭所有的操作，数据库开启后，使用完毕要关闭
     */
    public void closeConnection(){
        closeHelper();
        closeDaoSession();
    }

    public void closeHelper(){
        if(sHelper != null){
            sHelper.close();
            sHelper = null;
        }
    }

    public void closeDaoSession(){
        if(sDaoSession != null){
            sDaoSession.clear();
            sDaoSession = null;
        }
    }
}