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在Android中管理非本地sqlite数据库

[英]manage non local sqlite database in android

原文 2015-08-18 12:17:35 2 1 android/ database/ sqlite

I have started working with databases lately, I was able to create a local database and manage it in my Android app. 我最近开始使用数据库，我能够创建本地数据库并在我的Android应用程序中对其进行管理。 Now I want to move to higher level with it but I don't know how to do it. 现在我想将其推向更高的层次，但是我不知道该怎么做。

The users in my app need to be able to modify the database, for example insert new data in it. 我的应用程序中的用户需要能够修改数据库，例如在数据库中插入新数据。 When a user insert new data in the database I want other users to see this change in their copy of the database. 当用户在数据库中插入新数据时，我希望其他用户在其数据库副本中看到此更改。

I understand that I will need to store that database on a server or something and synchronize it with the users. 我了解我将需要将该数据库存储在服务器或其他设备上，并与用户进行同步。

Can anyone tell me the steps to do so? 谁能告诉我这样做的步骤？

1 个解决方案

You should perfom this task in steps. 您应该逐步执行此任务。

First, make the local database, and use a system to know when/what changed. 首先，建立本地数据库，并使用系统来了解何时/更改了什么。 I usually work with triggers myself, but any "mark" is enough to synchronize. 我通常自己使用触发器，但是任何“标记”都足以同步。

Then, you must make a replica of that database somewhere else. 然后，您必须在其他位置复制该数据库。 Realise that maintaining the databases is a process, any change in the structure of one database must be performed in all other as well. 意识到维护数据库是一个过程，一个数据库结构的任何更改也必须在所有其他数据库中执行。

Finally, you must implement a method to transfer the data. 最后，您必须实现一种传输数据的方法。

So, for an example: 因此，例如：

db_local the database in the device. db_local设备中的数据库。 db_outside the database in the internet. db_outside在db_outside的数据库。

db_local.trigger -> onInsert

On the applications, check for internet, then connect to your server, then upload the same command to db_outside and run it... 在应用程序上，检查互联网，然后连接到服务器，然后将同一命令上传到db_outside并运行它。

In this step, you must handle connection issues, and if the SQL command was succesfully executed, you have replicated the database content. 在此步骤中，您必须处理连接问题，并且如果成功执行了SQL命令，则您已经复制了数据库内容。

Once you have the replicated database, inform a system (like google cloud messaging), that the database was changed, and have the other users pull the info. 复制数据库后，请通知系统（例如google cloud消息传递）数据库已更改，并让其他用户提取信息。