如何更改会议室数据库的默认位置? [英] How can I change the default location of a Room database?

问题描述

我想更改Android Room数据库的位置.我知道该数据库位于文件系统内部，我需要获得root权限，但是我不想将我的手机设为root.

I want to change the location of the Android Room Database. I know that the database is inside of the files system, and I need to get root permissions, but I do not want to root my phone.

这个想法是将数据库位置更改为SD卡，并且无需root即可访问它

The idea is change the database location to SD card, and can access it without root my phone

推荐答案

只需将位置路径放在数据库名称中即可.
即:

Just put the location path in the name of the database.
I.e.:

AppDatabase db = Room.databaseBuilder(getApplicationContext(),
        AppDatabase.class, "database-name").build();

将路由器放入数据库名称.
即:

Put the router in database name.
I.e.:

 AppDatabase db = Room.databaseBuilder(getApplicationContext(),
        AppDatabase.class, "/storage/emulated/0/folder/database-name").build();

，不要忘记为应用程序授予写权限

thx @vitidev

thx @vitidev

更新

如果您定位到Android 10或更高版本，请在应用的清单文件中将requestLegacyExternalStorage的值设置为true:

If you target Android 10 or higher, set the value of requestLegacyExternalStorage to true in your app's manifest file:

<manifest ... >
<!-- This attribute is "false" by default on apps targeting
   Android 10 or higher. -->
 <application android:requestLegacyExternalStorage="true" ... >
...
 </application>
</manifest>

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