GreenDao的封装及使用

• 导入步骤：

第一步： 在项目的.gradle文件里面添加

buildscript {
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'
        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

 第二步：在moddle的.gradle文件里面添加

 

apply plugin: 'org.greenrobot.greendao'

android {

   compileSdkVersion 28
    defaultConfig {
        applicationId "com.****"
        *******
    }

   greendao {
        schemaVersion 1  //版本
        daoPackage 'com.puppy.***.databases' // 一般为app包名+生成文件的文件夹名
        targetGenDir 'src/main/java' //生成文件路径
    }
}


dependencies {
 implementation 'org.greenrobot:greendao:3.2.2' // add library
 implementation 'org.greenrobot:greendao-generator:3.2.2'
}

第三步： 添加Bean类，用User举例子 ， 一定要记得注解@Entity 如：

@Entity(nameInDb = "ums_manager_entity")
public class UmsManagerEntity {

    @Id(autoincrement = true)
    private Long id;
    private String module_id;//模块ID/*
    private String module_name;//模块说明/*

    private String event_id;//事件id/*
    private String event_name;//事件名称/*

    private int event_type;//事件类型 0基础使用 1中级使用 2高级使用/*

    private String lable_id;//lableID
    private String lable_name;//lable说明
    private String key_id;//keyID
    private String key_name;//key说明

    private Long value;//值/*

    private Long start_time;//开始时间
    private Long end_time;//结束时间

第四步：编译项目(执行Make Project)，PhoneContactsEntity实体类会自动编译，生成get、set方法并且会在com.puppy.***.databases目录下生成三个文件；

• 使用步骤：

 第一步：使用 DaoMaster.OpenHelper 也可自己继承 DaoMaster.OpenHelper 类；方便自己创建和升级

 说明：使用内部DaoMaster.OpenHelper在数据库升级时候数据会丢失；

 在这里，使用到这个工具类，升级数据就不会丢失。

public class UmsOpenHelper extends DaoMaster.OpenHelper {
    public UmsOpenHelper(Context context, String name) {
        super(context, name);
    }

    public UmsOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory) {
        super(context, name, factory);
    }

    @Override
    public void onCreate(Database db) {
        createAllTables(db, true);
    }

    @Override
    public void onUpgrade(Database db, int oldVersion, int newVersion) {

        //把需要管理的数据库表DAO作为最后一个参数传入到方法中
        migrate(db, new MigrationHelper.ReCreateAllTableListener() {

            @Override
            public void onCreateAllTables(Database db, boolean ifNotExists) {
                createAllTables(db, ifNotExists);
            }

            @Override
            public void onDropAllTables(Database db, boolean ifExists) {
                DaoMaster.dropAllTables(db, ifExists);
            }
        }, UmsManagerEntityDao.class); //更新的内容
    }
}

 这个是网上找的工具类，升级时用到；如果项目用不到升级数据库，可以不需要添加

public final class MigrationHelper {

    public static boolean DEBUG = false;
    private static String TAG = "MigrationHelper";
    private static final String SQLITE_MASTER = "sqlite_master";
    private static final String SQLITE_TEMP_MASTER = "sqlite_temp_master";

    private static WeakReference weakListener;

    public interface ReCreateAllTableListener{
        void onCreateAllTables(Database db, boolean ifNotExists);
        void onDropAllTables(Database db, boolean ifExists);
    }

    public static void migrate(SQLiteDatabase db, Class>... daoClasses) {
        printLog("【The Old Database Version】" + db.getVersion());
        Database database = new StandardDatabase(db);
        migrate(database, daoClasses);
    }

    public static void migrate(SQLiteDatabase db, ReCreateAllTableListener listener, Class>... daoClasses) {
        weakListener = new WeakReference<>(listener);
        migrate(db, daoClasses);
    }

    public static void migrate(Database database, ReCreateAllTableListener listener, Class>... daoClasses) {
        weakListener = new WeakReference<>(listener);
        migrate(database, daoClasses);
    }

    public static void migrate(Database database, Class>... daoClasses) {
        printLog("【Generate temp table】start");
        generateTempTables(database, daoClasses);
        printLog("【Generate temp table】complete");

        ReCreateAllTableListener listener = null;
        if (weakListener != null) {
            listener = weakListener.get();
        }

        if (listener != null) {
            listener.onDropAllTables(database, true);
            printLog("【Drop all table by listener】");
            listener.onCreateAllTables(database, false);
            printLog("【Create all table by listener】");
        } else {
            dropAllTables(database, true, daoClasses);
            createAllTables(database, false, daoClasses);
        }
        printLog("【Restore data】start");
        restoreData(database, daoClasses);
        printLog("【Restore data】complete");
    }

    private static void generateTempTables(Database db, Class>... daoClasses) {
        for (int i = 0; i < daoClasses.length; i++) {
            String tempTableName = null;

            DaoConfig daoConfig = new DaoConfig(db, daoClasses[i]);
            String tableName = daoConfig.tablename;
            if (!isTableExists(db, false, tableName)) {
                printLog("【New Table】" + tableName);
                continue;
            }
            try {
                tempTableName = daoConfig.tablename.concat("_TEMP");
                StringBuilder dropTableStringBuilder = new StringBuilder();
                dropTableStringBuilder.append("DROP TABLE IF EXISTS ").append(tempTableName).append(";");
                db.execSQL(dropTableStringBuilder.toString());

                StringBuilder insertTableStringBuilder = new StringBuilder();
                insertTableStringBuilder.append("CREATE TEMPORARY TABLE ").append(tempTableName);
                insertTableStringBuilder.append(" AS SELECT * FROM ").append(tableName).append(";");
                db.execSQL(insertTableStringBuilder.toString());
                printLog("【Table】" + tableName +"\n ---Columns-->"+getColumnsStr(daoConfig));
                printLog("【Generate temp table】" + tempTableName);
            } catch (SQLException e) {
                Log.e(TAG, "【Failed to generate temp table】" + tempTableName, e);
            }
        }
    }

    private static boolean isTableExists(Database db, boolean isTemp, String tableName) {
        if (db == null || TextUtils.isEmpty(tableName)) {
            return false;
        }
        String dbName = isTemp ? SQLITE_TEMP_MASTER : SQLITE_MASTER;
        String sql = "SELECT COUNT(*) FROM " + dbName + " WHERE type = ? AND name = ?";
        Cursor cursor=null;
        int count = 0;
        try {
            cursor = db.rawQuery(sql, new String[]{"table", tableName});
            if (cursor == null || !cursor.moveToFirst()) {
                return false;
            }
            count = cursor.getInt(0);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return count > 0;
    }


    private static String getColumnsStr(DaoConfig daoConfig) {
        if (daoConfig == null) {
            return "no columns";
        }
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < daoConfig.allColumns.length; i++) {
            builder.append(daoConfig.allColumns[i]);
            builder.append(",");
        }
        if (builder.length() > 0) {
            builder.deleteCharAt(builder.length() - 1);
        }
        return builder.toString();
    }


    private static void dropAllTables(Database db, boolean ifExists, @NonNull Class>... daoClasses) {
        reflectMethod(db, "dropTable", ifExists, daoClasses);
        printLog("【Drop all table by reflect】");
    }

    private static void createAllTables(Database db, boolean ifNotExists, @NonNull Class>... daoClasses) {
        reflectMethod(db, "createTable", ifNotExists, daoClasses);
        printLog("【Create all table by reflect】");
    }

    /**
     * dao class already define the sql exec method, so just invoke it
     */
    private static void reflectMethod(Database db, String methodName, boolean isExists, @NonNull Class>... daoClasses) {
        if (daoClasses.length < 1) {
            return;
        }
        try {
            for (Class cls : daoClasses) {
                Method method = cls.getDeclaredMethod(methodName, Database.class, boolean.class);
                method.invoke(null, db, isExists);
            }
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }

    private static void restoreData(Database db, Class>... daoClasses) {
        for (int i = 0; i < daoClasses.length; i++) {
            DaoConfig daoConfig = new DaoConfig(db, daoClasses[i]);
            String tableName = daoConfig.tablename;
            String tempTableName = daoConfig.tablename.concat("_TEMP");

            if (!isTableExists(db, true, tempTableName)) {
                continue;
            }

            try {
                // get all columns from tempTable, take careful to use the columns list
                List newTableInfos = TableInfo.getTableInfo(db, tableName);
                List tempTableInfos = TableInfo.getTableInfo(db, tempTableName);
                ArrayList selectColumns = new ArrayList<>(newTableInfos.size());
                ArrayList intoColumns = new ArrayList<>(newTableInfos.size());
                for (TableInfo tableInfo : tempTableInfos) {
                    if (newTableInfos.contains(tableInfo)) {
                        String column = '`' + tableInfo.name + '`';
                        intoColumns.add(column);
                        selectColumns.add(column);
                    }
                }
                // NOT NULL columns list
                for (TableInfo tableInfo : newTableInfos) {
                    if (tableInfo.notnull && !tempTableInfos.contains(tableInfo)) {
                        String column = '`' + tableInfo.name + '`';
                        intoColumns.add(column);

                        String value;
                        if (tableInfo.dfltValue != null) {
                            value = "'" + tableInfo.dfltValue + "' AS ";
                        } else {
                            value = "'' AS ";
                        }
                        selectColumns.add(value + column);
                    }
                }

                if (intoColumns.size() != 0) {
                    StringBuilder insertTableStringBuilder = new StringBuilder();
                    insertTableStringBuilder.append("REPLACE INTO ").append(tableName).append(" (");
                    insertTableStringBuilder.append(TextUtils.join(",", intoColumns));
                    insertTableStringBuilder.append(") SELECT ");
                    insertTableStringBuilder.append(TextUtils.join(",", selectColumns));
                    insertTableStringBuilder.append(" FROM ").append(tempTableName).append(";");
                    db.execSQL(insertTableStringBuilder.toString());
                    printLog("【Restore data】 to " + tableName);
                }
                StringBuilder dropTableStringBuilder = new StringBuilder();
                dropTableStringBuilder.append("DROP TABLE ").append(tempTableName);
                db.execSQL(dropTableStringBuilder.toString());
                printLog("【Drop temp table】" + tempTableName);
            } catch (SQLException e) {
                Log.e(TAG, "【Failed to restore data from temp table 】" + tempTableName, e);
            }
        }
    }

    private static List getColumns(Database db, String tableName) {
        List columns = null;
        Cursor cursor = null;
        try {
            cursor = db.rawQuery("SELECT * FROM " + tableName + " limit 0", null);
            if (null != cursor && cursor.getColumnCount() > 0) {
                columns = Arrays.asList(cursor.getColumnNames());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (cursor != null)
                cursor.close();
            if (null == columns)
                columns = new ArrayList<>();
        }
        return columns;
    }

    private static void printLog(String info){
        if(DEBUG){
            Log.d(TAG, info);
        }
    }

    private static class TableInfo {
        int cid;
        String name;
        String type;
        boolean notnull;
        String dfltValue;
        boolean pk;

        @Override
        public boolean equals(Object o) {
            return this == o
                    || o != null
                    && getClass() == o.getClass()
                    && name.equals(((TableInfo) o).name);
        }

        @Override
        public String toString() {
            return "TableInfo{" +
                    "cid=" + cid +
                    ", name='" + name + '\'' +
                    ", type='" + type + '\'' +
                    ", notnull=" + notnull +
                    ", dfltValue='" + dfltValue + '\'' +
                    ", pk=" + pk +
                    '}';
        }

        private static List getTableInfo(Database db, String tableName) {
            String sql = "PRAGMA table_info(" + tableName + ")";
            printLog(sql);
            Cursor cursor = db.rawQuery(sql, null);
            if (cursor == null)
                return new ArrayList<>();

            TableInfo tableInfo;
            List tableInfos = new ArrayList<>();
            while (cursor.moveToNext()) {
                tableInfo = new TableInfo();
                tableInfo.cid = cursor.getInt(0);
                tableInfo.name = cursor.getString(1);
                tableInfo.type = cursor.getString(2);
                tableInfo.notnull = cursor.getInt(3) == 1;
                tableInfo.dfltValue = cursor.getString(4);
                tableInfo.pk = cursor.getInt(5) == 1;
                tableInfos.add(tableInfo);
                // printLog(tableName + "：" + tableInfo);
            }
            cursor.close();
            return tableInfos;
        }
    }

}

 第二步：封装DatabaseManager工具类

1.声明数据库名字

    private static final String DB_NAME = "ums_databases";//数据库名字
    private UmsOpenHelper mHelper;
    private SQLiteDatabase db;
    private DaoMaster mDaoMaster;
    private DaoSession mDaoSession;

 2.创建DaoSession

public DaoSession getDaoSession(){
        if(mDaoSession == null){
            if(mDaoMaster == null){
                mDaoMaster = getDaoMaster();
            }
            mDaoSession = mDaoMaster.newSession();
        }
        return mDaoSession;
    }

3. 创建DaoMaster

 private DaoMaster getDaoMaster(){
        if(mDaoMaster == null){
            mHelper = new UmsOpenHelper(mContext, DB_NAME, null);
            // 注意：该数据库连接属于 DaoMaster，所以多个 Session 指的是相同的数据库连接。
            db =  mHelper.getWritableDatabase();
            mDaoMaster = new DaoMaster(db);
        }
        return mDaoMaster;
    }

创建完成，具体工具类如下：

public class DatabaseManager {

    private static final String DB_NAME = "ums_databases";
    private Context mContext;

    private UmsOpenHelper mHelper;
    private SQLiteDatabase db;
    private DaoMaster mDaoMaster;
    private DaoSession mDaoSession;

    @SuppressLint("StaticFieldLeak")
    private volatile static DatabaseManager daoManager = new DatabaseManager();

    public static DatabaseManager getInstance(){
        return daoManager;
    }

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

    private DaoMaster getDaoMaster(){
        if(mDaoMaster == null){
            mHelper = new UmsOpenHelper(mContext, DB_NAME, null);
            // 注意：该数据库连接属于 DaoMaster，所以多个 Session 指的是相同的数据库连接。
            db =  mHelper.getWritableDatabase();
            mDaoMaster = new DaoMaster(db);
        }
        return mDaoMaster;
    }

    public DaoSession getDaoSession(){
        if(mDaoSession == null){
            if(mDaoMaster == null){
                mDaoMaster = getDaoMaster();
            }
            mDaoSession = mDaoMaster.newSession();
        }
        return mDaoSession;
    }

    public UmsOpenHelper getmHelper(){
        if(mHelper == null){
            mHelper = new UmsOpenHelper(mContext, DB_NAME, null);
        }
        return mHelper;
    }


    public SQLiteDatabase getDb() {
        return db;
    }
    public static String getTableName(){
        return "ums_manager_entity";
    }
    public void setDebug(){
        QueryBuilder.LOG_SQL = true;
        QueryBuilder.LOG_VALUES = true;
    }

    public void closeConnection(){
        closeHelper();
        closeDaoSession();
    }

    private void closeHelper(){
        if(mHelper != null){
            mHelper.close();
            mHelper = null;
        }
    }

    private void closeDaoSession(){
        if(mDaoSession != null){
            mDaoSession.clear();
            mDaoSession = null;
        }
    }

}

 第三步：调用创建 在Application 中创建

public class UmsApplication extends Application {

    public static final String appKey ="952948093568265943";//UMS TEST
    public static final String appSecret="9a922945dde3t4dy89jd4ei8494u2r25eb7c4d8r";//umstest secrect key
    public static final String sysversion="TAACHOP0100141904271D";//or set empty like "";

    public static final String channel = "puppy";
    public static final int env=1;//0 debug; 1 release;

    //静态单例
    public static UmsApplication instances;
    private DaoSession mDaoSession;

    @Override
    public void onCreate()
    {
        super.onCreate();
        instances = this;
        setDatabase();
    }

    public static UmsApplication getInstances(){
        return instances;
    }

    /**
     * 设置greenDao  
     */
    private void setDatabase() {
        DatabaseManager databaseManager = DatabaseManager.getInstance();
        databaseManager.init(this);
        mDaoSession = databaseManager.getDaoSession();
    }

    public DaoSession getDaoSession() {
        return mDaoSession;
    }


}

 第四步：对表的操作，实现增删该查：

 创建UmsManagerUtils工具类

public class UmsManagerUtils {

    private static final String TAG = UmsManagerUtils.class.getSimpleName();

    private static UmsManagerUtils instance;

    private UmsManagerEntityDao umsEntityDao;
    private DaoSession daoSession;

    private UmsManagerUtils() {
        umsEntityDao = UmsApplication.getInstances().getDaoSession().getUmsManagerEntityDao();
        daoSession = UmsApplication.getInstances().getDaoSession();
    }

//***初始化
    public static UmsManagerUtils getInstance() {
        if (instance == null) {
            synchronized (UmsManagerUtils.class) {
                if (instance == null) {
                    instance = new UmsManagerUtils();
                }
            }
        }
        return instance;
    }


//***添加
    public synchronized boolean insert(UmsManagerEntity entity){

        UmsManagerEntity temp = umsEntityDao.queryBuilder()
                .where(UmsManagerEntityDao.Properties.Event_id.eq(entity.getEvent_id())).build().unique();
        if(temp != null){
            Long value = entity.getValue();
            Long valueDataBases = temp.getValue();

            temp.setValue(value+valueDataBases);
            return updateDevice(temp);
        }else{
            return umsEntityDao.insert(entity) != -1;
        }

    }

    public synchronized boolean insertByLable(UmsManagerEntity entity){
        UmsManagerEntity temp = umsEntityDao.queryBuilder()
                .where(UmsManagerEntityDao.Properties.Event_id.eq(entity.getEvent_id()),UmsManagerEntityDao.Properties.Lable_id.eq(entity.getLable_id())).build().unique();
        if(temp != null){
            Long value = entity.getValue();
            Long valueDataBases = temp.getValue();

            temp.setValue(value+valueDataBases);
            return updateDevice(temp);
        }else{
            return umsEntityDao.insert(entity) != -1;
        }
    }
 

    public boolean insertMultDevices(final List UmsManagerEntityList){
        boolean flag = false;
        try{
            daoSession.runInTx(new Runnable() {
                @Override
                public void run() {
                    for(UmsManagerEntity device : UmsManagerEntityList){
                        updateDevice(device);
                    }
                }
            });
            flag = true;
        }catch(Exception e){
            e.printStackTrace();
            flag = false;
        }
        return flag;
    }

///****更新
    public synchronized boolean updateDevice(UmsManagerEntity device){
        boolean flag = false;
        try {
            umsEntityDao.update(device);
            flag = true;
        }catch (Exception e){
            e.printStackTrace();
        }
        return flag;
    }

///**根据对象删除  单个字段对比
    public boolean deleteDeviceEvent(UmsManagerEntity device){
        boolean flag = false;
        try {
            UmsManagerEntity temp = umsEntityDao.queryBuilder()
                    .where(UmsManagerEntityDao.Properties.Event_id.eq(device.getEvent_id())).build().unique();
            umsEntityDao.delete(temp);
            flag = true;
        }catch (Exception e){
            e.printStackTrace();
        }
        return flag;
    }


///**根据对象删除  多个字段对比
    public boolean deleteDeviceKey(UmsManagerEntity device){
        boolean flag = false;
        try {
            UmsManagerEntity temp = umsEntityDao.queryBuilder()
                    .where(UmsManagerEntityDao.Properties.Event_id.eq(device.getEvent_id()),UmsManagerEntityDao.Properties.Lable_id.eq(device.getLable_id()),UmsManagerEntityDao.Properties.Key_id.eq(device.getKey_id())).build().unique();
            umsEntityDao.delete(temp);
            flag = true;
        }catch (Exception e){
            e.printStackTrace();
        }
        return flag;
    }

//***删除所有
    public synchronized boolean deleteAll(){
        boolean flag = false;
        try {
            daoSession.deleteAll(UmsManagerEntity.class);
            flag = true;
        }catch (Exception e){
            e.printStackTrace();
        }
        return flag;
    }

//**查询搜索
    public List queryAllDevices(){
        return daoSession.loadAll(UmsManagerEntity.class);
    }

//根据字段查询
    public List queryDeviceByTypeId(int event_type)
    {
        List list = umsEntityDao.queryBuilder()
                .where(UmsManagerEntityDao.Properties.Event_type.eq(event_type)).build().list();
        return list;
    }
}

 第五步：调用很简单

                UmsManagerEntity managerEntityTime = new UmsManagerEntity();
                managerEntityTime.setModule_id(Content.MODULE_ID_ROM_PROJECT);
                managerEntityTime.setModule_name(Content.MODULE_NAME_ROM_PROJECT);
                managerEntityTime.setValue(timeValue);
                UmsManagerUtils.getInstance().insert(managerEntityTime);

 数据库升级：

1. 直接修改 Entity Bean，修改或添加你想要的属性

 2.修改升级 app.build

schemaVersion 1  //版本

3.在OpenHelper

onUpgrade方法中，升级

其他技巧：

1.where 和whereOr的使用

 whereOr ：或条件查询 多个或用“，”分隔

 where：和条件查询 多个和用“，”分隔

例如：当前用户，展示状态 查询用户手机号码或姓名中包含有关键字的人

List list = phoneContactsEntityDao.queryBuilder().whereOr(PhoneContactsEntityDao.Properties.Phone.like("%" + key + "%"),PhoneContactsEntityDao.Properties.Name.like("%" + key + "%")).where(PhoneContactsEntityDao.Properties.IsShow.eq("1"), PhoneContactsEntityDao.Properties.LogingId.eq(ConfigUtils.getUid())).build().list();

 2.GreeDao使用sql语句  ，如果满足不了需求，可以使用Sql语句

String sql = "update `" + talbelName + "` set `USER_SATE` = '1' where `LOGING_ID` = '" + ConfigUtils.getUid() + "' and PHONE='" + upSateContacts.get(i).getPhone() + "'";

daoSession.getDatabase().execSQL(sql);