Android GreenDao3.2.0如何使用？

1.配置module 的

首部配置下面一行：

apply plugin: 'org.greenrobot.greendao'

greendao指定生成的文件目录

2.配置project的build.gradle文件

dependencies {    classpath 'com.android.tools.build:gradle:2.3.0'    classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1'    // NOTE: Do not place your application dependencies here; they belong    // in the individual module build.gradle files}

3.自定义User类，

package com.lele.hl_pc_java.greendao;import org.greenrobot.greendao.annotation.Entity;import org.greenrobot.greendao.annotation.Id;import org.greenrobot.greendao.annotation.Property;import org.greenrobot.greendao.annotation.Generated;/** * Created by HL-PC-JAVA on 2017/3/24. */@Entitypublic class User {    @Id(autoincrement = true)    private Long id;    @Property(nameInDb = "username")    private String name;    private int age;    @Generated(hash = 1309193360)    public User(Long id, String name, int age) {        this.id = id;        this.name = name;        this.age = age;    }    @Generated(hash = 586692638)    public User() {    }    public Long getId() {        return this.id;    }    public void setId(Long id) {        this.id = id;    }    public String getName() {        return this.name;    }    public void setName(String name) {        this.name = name;    }    public int getAge() {        return this.age;    }    public void setAge(int age) {        this.age = age;    }    @Override    public String toString() {        return "User{" +                "id=" + id +                ", name='" + name + '\'' +                ", age=" + age +                '}';    }}

然后点击Build---》make project,则在新建的gen目录下会自动生成三个文件

4.自定义GreenDaoManager

package com.lele.hl_pc_java.greendao;import android.app.Application;import android.content.Context;import com.lele.hl_pc_java.greendao.gen.DaoMaster;import com.lele.hl_pc_java.greendao.gen.DaoSession;/** * Created by HL-PC-JAVA on 2017/3/24. */public class GreenDaoManager {    private static DaoMaster mDaoMaster;    private static DaoSession mDaoSession;    private static volatile GreenDaoManager mInstance=null;    public static GreenDaoManager getmInstance(Context context) {//构造方法        if (mInstance == null) {            DaoMaster.DevOpenHelper devOpenHelper =                    new DaoMaster.DevOpenHelper(context, "user.db");            mDaoMaster = new DaoMaster(devOpenHelper.getWritableDb());            mDaoSession = mDaoMaster.newSession();            mInstance=new GreenDaoManager();        }        return mInstance;    }    public DaoMaster getMaster(){        return mDaoMaster;    }    public DaoSession getSession(){        return mDaoSession;    }    public DaoSession getNewSession(){        mDaoSession=mDaoMaster.newSession();        return  mDaoSession;    }}

5.使用greendaoManager进行数据的增删改查

package com.lele.hl_pc_java.greendao;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.TextView;import com.lele.hl_pc_java.greendao.gen.UserDao;import org.w3c.dom.Text;public class MainActivity extends AppCompatActivity {    UserDao userDao;    TextView showInfo;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        showInfo= (TextView) findViewById(R.id.userInfo);        userDao=GreenDaoManager.getmInstance(this).getNewSession().getUserDao();    }    public void add(View view){        User user=new User(1000L,"angle",20);        userDao.insert(user);    }    public void update(View view){        User user1=new User(1000L,"angle in earth",18);        userDao.update(user1);    }    public void delete(View view){       userDao.deleteByKey(1000L);    }public void query(View view){    User user=userDao.load(1000L);    if (user==null){        user=new User();        user.setName("我被删除啦！");    }    showInfo.setText("当前用户的信息："+user.toString());}}

over!