引用最新版greendao

 implementation "org.greenrobot:greendao:3.2.2"

配置生成路径和版本号

greendao {
    schemaVersion 1
    daoPackage 'com.xk.greendao.db'
    targetGenDir 'src/main/java'
}

说明:版本号为1，生成文件放在com.xk.greendao.db下的这个路径里src/main/java.

点击Mark Project键,就会生成相关文件

image.png

image.png

greendao 表的注解说明(我为了方便就按照我的项目里建的表来说了)

表:

import com.xk.gvido.app.model.net.bean.video.VideoSimpleInfoBean;

import org.greenrobot.greendao.annotation.Entity;
import org.greenrobot.greendao.annotation.Generated;
import org.greenrobot.greendao.annotation.Id;
import org.greenrobot.greendao.annotation.Index;
import org.greenrobot.greendao.annotation.NotNull;
import org.greenrobot.greendao.annotation.Property;

import java.util.Date;

/**
 * @author Xiong Ke
 * @date 2017/10/19
 */
@Entity(nameInDb = "browsing_history")
public class BrowsingHistory {

    @Property(nameInDb = "_title")
    private String title;

    @Property(nameInDb = "_pic")
    private String pic;

    @Id
    @NotNull
    @Index(unique = true)
    @Property(nameInDb = "_dataId")
    private String dataId;

    @Property(nameInDb = "_score")
    private String score;

    @Property(nameInDb = "_airTime")
    private String airTime;

    @Property(nameInDb = "_moreURL")
    private String moreURL;

    @Property(nameInDb = "_loadURL")
    private String loadURL;

    @Property(nameInDb = "_duration")
    private String duration;

    @Property(nameInDb = "_description")
    private String description;

    @Property(nameInDb = "_angleIcon")
    private String angleIcon;

    @Property(nameInDb = "_roomId")
    private String roomId;

    @Property(nameInDb = "_shareURL")
    private String shareURL;

    @Property(nameInDb = "_loadType")
    private String loadType;

    @Property(nameInDb = "_browsingDate")
    private Date browsingDate;

    public static BrowsingHistory newInstance(VideoSimpleInfoBean videoSimpleInfoBean) {
        return new BrowsingHistory(videoSimpleInfoBean.title
                , videoSimpleInfoBean.pic
                , videoSimpleInfoBean.dataId
                , videoSimpleInfoBean.score
                , videoSimpleInfoBean.airTime
                , videoSimpleInfoBean.moreURL
                , videoSimpleInfoBean.loadURL
                , videoSimpleInfoBean.duration
                , videoSimpleInfoBean.description
                , videoSimpleInfoBean.angleIcon
                , videoSimpleInfoBean.roomId
                , videoSimpleInfoBean.shareURL
                , videoSimpleInfoBean.loadType
                , new Date());
    }

    @Generated(hash = 1357393467)
    public BrowsingHistory(String title, String pic, @NotNull String dataId,
                           String score, String airTime, String moreURL, String loadURL,
                           String duration, String description, String angleIcon, String roomId,
                           String shareURL, String loadType, Date browsingDate) {
        this.title = title;
        this.pic = pic;
        this.dataId = dataId;
        this.score = score;
        this.airTime = airTime;
        this.moreURL = moreURL;
        this.loadURL = loadURL;
        this.duration = duration;
        this.description = description;
        this.angleIcon = angleIcon;
        this.roomId = roomId;
        this.shareURL = shareURL;
        this.loadType = loadType;
        this.browsingDate = browsingDate;
    }

    @Generated(hash = 1959202334)
    public BrowsingHistory() {
    }

    public String getTitle() {
        return this.title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getPic() {
        return this.pic;
    }

    public void setPic(String pic) {
        this.pic = pic;
    }

    public String getDataId() {
        return this.dataId;
    }

    public void setDataId(String dataId) {
        this.dataId = dataId;
    }

    public String getScore() {
        return this.score;
    }

    public void setScore(String score) {
        this.score = score;
    }

    public String getAirTime() {
        return this.airTime;
    }

    public void setAirTime(String airTime) {
        this.airTime = airTime;
    }

    public String getMoreURL() {
        return this.moreURL;
    }

    public void setMoreURL(String moreURL) {
        this.moreURL = moreURL;
    }

    public String getLoadURL() {
        return this.loadURL;
    }

    public void setLoadURL(String loadURL) {
        this.loadURL = loadURL;
    }

    public String getDuration() {
        return this.duration;
    }

    public void setDuration(String duration) {
        this.duration = duration;
    }

    public String getDescription() {
        return this.description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getAngleIcon() {
        return this.angleIcon;
    }

    public void setAngleIcon(String angleIcon) {
        this.angleIcon = angleIcon;
    }

    public String getRoomId() {
        return this.roomId;
    }

    public void setRoomId(String roomId) {
        this.roomId = roomId;
    }

    public String getShareURL() {
        return this.shareURL;
    }

    public void setShareURL(String shareURL) {
        this.shareURL = shareURL;
    }

    public String getLoadType() {
        return this.loadType;
    }

    public void setLoadType(String loadType) {
        this.loadType = loadType;
    }

    public Date getBrowsingDate() {
        return this.browsingDate;
    }

    public void setBrowsingDate(Date browsingDate) {
        this.browsingDate = browsingDate;
    }
}

说明：
a. @Entity(nameInDb = "browsing_history") 生成的表的名字
b.
@Id 表的主键
@Index(unique = true) 主键索引唯一
@Property(nameInDb = "_dataId") 键值得名字
c. 每次创建新表时，都要提高表的版本号，然后重新编辑

3.使用方法

public class AppDbHelper implements DbHelper {
    private static AppDbHelper appDbHelper;
    private static DaoSession mDaoSession;

    private AppDbHelper() {
    }

    public static AppDbHelper getInstance() {
        if (appDbHelper == null) {
            synchronized (AppDbHelper.class) {
                if (appDbHelper == null) {
                    appDbHelper = new AppDbHelper();
                }
            }
        }
        return appDbHelper;
    }

  //application中初始化
    public static void init(Application application){
        DaoMaster.DevOpenHelper dbOpenHelper = new DaoMaster.DevOpenHelper(application, DbConfig.DATABASE_NAME);
        Database db = dbOpenHelper.getWritableDb();
        mDaoSession = new DaoMaster(db).newSession();
        if (BuildConfig.DEBUG) {
            QueryBuilder.LOG_SQL = true;
            QueryBuilder.LOG_VALUES = true;
        }
    }

    @Override
    public Observable<Long> insertOrReplaceHotSearch(final List<SearchHotRecommend> searchHotRecommends) {
        return Observable.fromCallable(() -> {
            mDaoSession.getSearchHotRecommendDao().deleteAll();
            mDaoSession.getSearchHotRecommendDao().insertOrReplaceInTx(
                    searchHotRecommends.toArray(new SearchHotRecommend[searchHotRecommends.size()]));
            return 1L;
        });
    }

    @Override
    public Observable<List<SearchHotRecommend>> getHotSearch() {
        return Observable.just(mDaoSession.getSearchHotRecommendDao().loadAll());
    }

    @Override
    public Observable<Long> insertOrReplacePictures(final List<Picture> pictures) {
        return Observable.fromCallable(() -> {
            PictureDao pictureDao = mDaoSession.getPictureDao();
            pictureDao.insertOrReplaceInTx(pictures.toArray(new Picture[pictures.size()]));
            List<Picture> pictureList = pictureDao.loadAll();
            if (pictureList.size() > 200) {
                List<Picture> _pictureList = pictureList.subList(200, pictureList.size());
                pictureDao.deleteInTx(_pictureList.toArray(new Picture[_pictureList.size()]));
            }
            return 1L;
        });
    }

}

public class DbConfig {
    public static final String DATABASE_NAME = "gVideo";
}

说明:
DbHelper是我写的一个接口类，这个类来实现的.