android - manifest中的original-package有什么用

Question

有人知道 list 中 original-package 的确切用途是什么吗？

我刚从 manifest attr 收到以下评论关联。但是不知道怎么用，具体什么时候用？

Private tag to declare the original package name that this package is based on. Only used for packages installed in the system image. If given, and different than the actual package name, and the given original package was previously installed on the device but the new one was not, then the data for the old one will be renamed to be for the new package.

有知道的请详细说明一下吗？

Answer 1

来自文档:

Private tag to declare the original package name that this package is based on. Only used for packages installed in the system image. If given, and different than the actual package name, and the given original package was previously installed on the device but the new one was not, then the data for the old one will be renamed to be for the new package.

Eg:

    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.android.deskclock"
    android:versionCode="301" android:versionName="3.0.0">

       <original-package android:name="com.android.alarmclock" />
       <original-package android:name="com.android.deskclock" />