Greendao-鑫鑫

Preson

package com.example.zhaoxinle20181101;

import org.greenrobot.greendao.annotation.Entity;
import org.greenrobot.greendao.annotation.Generated;
import org.greenrobot.greendao.annotation.Id;
import org.greenrobot.greendao.annotation.Property;
import org.greenrobot.greendao.annotation.Transient;

/**
 * Created by 红鼻子小黑 on 2018/11/1.
 */
@Entity(nameInDb = "person_table")
public class PerSon {
    @Id(autoincrement = true)
    public Long id;
    @Property(nameInDb = "name")
    public String mingzi;
    public int ages;
    @Transient
    public String identity;
    @Generated(hash = 1681598502)
    public PerSon(Long id, String mingzi, int ages) {
        this.id = id;
        this.mingzi = mingzi;
        this.ages = ages;
    }
    @Generated(hash = 1729946859)
    public PerSon() {
    }
    public Long getId() {
        return this.id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getMingzi() {
        return this.mingzi;
    }
    public void setMingzi(String mingzi) {
        this.mingzi = mingzi;
    }
    public int getAges() {
        return this.ages;
    }
    public void setAges(int ages) {
        this.ages = ages;
    }

    @Override
    public String toString() {
        return "PerSon{" +
                "id=" + id +
                ", mingzi='" + mingzi + '\'' +
                ", ages=" + ages +
                ", identity='" + identity + '\'' +
                '}';
    }
}

DaoManager

package com.example.zhaoxinle20181101;

import android.content.Context;

/**
 * Created by 红鼻子小黑 on 2018/11/1.
 */

public class DaoManager {
    private static DaoManager daoManager;
    private DaoSession daoSession;
    private DaoManager (Context context){
        daoSession = DaoMaster.newDevSession(context,"person.db");
    }
    public static DaoManager getInstance(Context context){
        if (daoManager == null){
            synchronized (DaoManager.class){
                if (daoManager == null){
                    daoManager = new DaoManager(context);
                }
            }
        }
        return daoManager;
    }
    public DaoSession getDaoSession(){
        return daoSession;
    }
}

主页面

package com.example.zhaoxinle20181101;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;


public class MainActivity extends AppCompatActivity {

    @BindView(R.id.cx)
    Button cx;
    @BindView(R.id.tj)
    Button tj;
    @BindView(R.id.xg)
    Button xg;
    @BindView(R.id.sc)
    Button sc;
    private DaoSession daoSession;
    private PerSonDao perSonDao;
    private int index;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        daoSession = DaoManager.getInstance(this).getDaoSession();
        perSonDao = daoSession.getPerSonDao();

    }
    public void query(View view) {
        List<PerSon> list = perSonDao.queryBuilder()
                .where(PerSonDao.Properties.Ages.lt(500))
                .orderAsc(PerSonDao.Properties.Ages)
                .build()
                .list();
        for (PerSon perSon:list){
            Log.e("tag","query"+ perSon.toString());
        }
    }

    public void add(View view) {
        index++;
        PerSon perSon = new PerSon(null,"name"+index,index*10);
        perSonDao.insert(perSon);
    }

    public void update(View view) {
        List<PerSon> list1 = perSonDao.queryBuilder()
                .where(PerSonDao.Properties.Ages.lt(500))
                .orderAsc(PerSonDao.Properties.Ages)
                .build()
                .list();
        for (PerSon perSon1:list1){
            if (perSon1.ages == 20){
                perSon1.ages = 100;
                perSonDao.update(perSon1);
            }
        }
    }

    public void delete(View view) {
        PerSon perSon1 = perSonDao.queryBuilder()
                .where(PerSonDao.Properties.Id.eq(2))
                .build()
                .unique();
        if (perSon1!=null){
            perSonDao.delete(perSon1);
        }
    }
}