如何在保持向后兼容性的同时将 foregroundServiceType 添加到库清单？

Question

My library project has a location service, and per Android Q requirements it sets the android:foregroundServiceType="location" attribute in the manifest. When an app module uses my library and compiles against API level 28, it fails with the following error:

AndroidManifest.xml:57: AAPT: error: attribute android:foregroundServiceType not found.

How can my library maintain compatibility with older versions, while making sure the functionality works on Android Q?

Answer 1

I had same error and after migrating to Androidx and updating compileSdkVersion from 28 to 29 my issue was resolved. So please do these changes and you can get your solution

Answer 2

My goal is to avoid breaking anyone's build when the library version is updated, and at the same time avoid forcing the developer to compile against API 29. It seems I have two choices:

• Provide a separate library so that developers compiling against API 28 and lower don't get impacted;
• warn developers targeting the new version to replace the service definition in the manifest using tools:node="replace" .

The problem with the first approach is that I will need to maintain two libraries for some time. The problem with the second is that developers must remember to revert the change once they update the SDK version.

In my case, I will go with the second approach. By passing an explicit foreground service type to the startForeground method when targeting Android Q, I can cause a crash if the type is not set in the manifest. The developer can therefore catch this when targeting Android Q and revert the manifest change to fix it.