在初始阶段,我安装了我的安乐器,并安装了一个空白数据库。 安装后将建立一个数据库,储存名称,并复制已经建立的数据库,并用不同的表格将Kingh浏览器输入新创建的数据库。 几天后,数据将储存在Kalker数据库,同时管理我的申请。
问题在于,当我安装了电话更新申请,并对下一次释放做了一些修改。 我已经运行的申请数据库需要留在那里。 在安装新胶卷的同时,我怎么能保留旧的数据库?
另外,如果我需要更新数据库,同时又不丢失数据的话?
在初始阶段,我安装了我的安乐器,并安装了一个空白数据库。 安装后将建立一个数据库,储存名称,并复制已经建立的数据库,并用不同的表格将Kingh浏览器输入新创建的数据库。 几天后,数据将储存在Kalker数据库,同时管理我的申请。
问题在于,当我安装了电话更新申请,并对下一次释放做了一些修改。 我已经运行的申请数据库需要留在那里。 在安装新胶卷的同时,我怎么能保留旧的数据库?
另外,如果我需要更新数据库,同时又不丢失数据的话?
You are maualy adding the database onto the Android storage, so it can t be retained in the project. You should build a database from the project and insert data within, to the database is generated when first execution is initiated.
http://www.vogella.de/articles/AndroidSQLite/article.html” rel=“nofollow”>vogella.de。
And another one: androidforbeginners.blogspot.com
我希望这一帮助能够做到。
您可以通过打电话<代码>SQLiteDatabase. openDatabase(String,kouiteDatabase.CursorFactory, int)来检查数据库是否已经建立。 如果它扔下了
我建议您将<代码>SQLiteOpenHelper的类别予以延长,并执行<代码>onCreate(SQLiteDatabase)和
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