如何读取另一个应用程序的数据库 [英] How to read database of another application

问题描述

我正在使用有根的设备。
我从我的pc连接到adb shell，我可以验证其他数据库存在，我可以查询其表。

I am working on a rooted device. I have connected with the adb shell from my pc and I can verify that the other database exists and I can query its tables.

但是在我的java代码当我尝试打开数据库时我收到错误

However in the my java code when I try to open the database I get error

android.database.sqlite.SQLiteException：无法打开数据库文件

android.database.sqlite.SQLiteException: unable to open database file

我试图像这样打开数据库：

I am trying to open the database like this:

SQLiteDatabase.openDatabase(PATH, null, SQLiteDatabase.OPEN_READONLY);

路径类似于/data/data/com.xxx.xxx/databases/xx.db

The path is something like /data/data/com.xxx.xxx/databases/xx.db

我应该读取其他应用程序的数据库，还是有另一种方法？

Am I supposed to read the databases of other applications like this or there is another way?

我也试着让系统应用程序在这个线程中提供建议将我的apk推送到/ system / app

我认为这是可行的，因为应用程序无法从应用程序管理器像普通应用程序那样卸载，所以我认为它是一个系统app。但是我仍然无法访问数据库，但我确定路径和权限是确定的。

I think it works because the app cannot be uninstalled after that from the applications manager like the ordinary apps so I think it is a system app. But still I cannot access the database though I am sure the paths and permissions are ok.

推荐答案

Android操作系统默认不允许应用程序访问彼此的私人文件夹。要能够读取另一个应用程序文件夹中的文件：

Android OS by default does not allow applications to access each others private folders. To be able to read files that are in another applications folder either:

1）您需要使用相同的 code>。将它添加到以下两个清单中：

1) you need to have both applications installed using same user id. Add this to both manifests:

android:sharedUserId="com.xx.xx"

2）如果其他应用程序是第三方应用程序，那么您唯一的选择是将应用程序安装为系统应用程序。要做到这一点，你需要一个有根的手机，你需要挂载 system 文件夹。然后，您需要将您的应用程序放入 / system / app / 文件夹，然后重新启动手机。它应该在启动期间自动安装。

2) If other app is a 3rd party app then your only choice is to install your app as system application. To do that you need a rooted phone and you need to mount the system folder. And then you need to put your application into /system/app/ folder and reboot the phone. It should be installed automatically during the boot.

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