无法在Android Q中识别MediaProjection服务类型 [英] MediaProjection service type not recognized in android Q

问题描述

随着新的隐私权更改在Android Q上生效，使用 MediaProjection api的任何应用现在都必须指定

With the new privacy changes in effect with Android Q, it is now mandatory for any app using MediaProjection api to specify android:foregroundServiceType attribute in the service tag under manifest.

但是最近，我注意到尽管我设置了 android:foregroundServiceType ="mediaprojection" ，但仍引发了安全异常.有人知道我在做什么错吗?

But recently, I noticed that though I set the android:foregroundServiceType="mediaprojection" there is a security exception thrown. Does anybody have any idea what I'm doing wrong?

清单:

<service
            android:name=".services.MediaProjectionService"
            android:enabled="true"
            android:exported="false"
            android:foregroundServiceType="mediaProjection" />

引发异常:

java.lang.RuntimeException: Unable to start service com.package.app.services.MediaProjectionService@6d0fed2 with Intent { act=com.package.app.services.action.startrecording cmp=com.package.app/.services.MediaProjectionService(has extras) }: java.lang.SecurityException: Media projections require a foreground service of type ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION
        at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4103)
        at android.app.ActivityThread.access$1800(ActivityThread.java:219)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1891)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7343)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:933)
     Caused by: java.lang.SecurityException: Media projections require a foreground service of type ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION
        at android.os.Parcel.createException(Parcel.java:2071)
        at android.os.Parcel.readException(Parcel.java:2039)
        at android.os.Parcel.readException(Parcel.java:1987)
        at android.media.projection.IMediaProjection$Stub$Proxy.start(IMediaProjection.java:231)
        at android.media.projection.MediaProjection.<init>(MediaProjection.java:58)
        at android.media.projection.MediaProjectionManager.getMediaProjection(MediaProjectionManager.java:104)
        at com.package.app.services.MediaProjectionService.startRecording(MediaProjectionService.java:190)
        at com.package.app.services.MediaProjectionService.onStartCommand(MediaProjectionService.java:142)
        at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4085)
        at android.app.ActivityThread.access$1800(ActivityThread.java:219) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1891) 
        at android.os.Handler.dispatchMessage(Handler.java:107) 
        at android.os.Looper.loop(Looper.java:214) 
        at android.app.ActivityThread.main(ActivityThread.java:7343) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:933) 
     Caused by: android.os.RemoteException: Remote stack trace:
        at com.android.server.media.projection.MediaProjectionManagerService$MediaProjection.start(MediaProjectionManagerService.java:476)
        at android.media.projection.IMediaProjection$Stub.onTransact(IMediaProjection.java:135)
        at android.os.Binder.execTransactInternal(Binder.java:1021)
        at android.os.Binder.execTransact(Binder.java:994)

P.S:这在具有目标SDK 29的Android Q DP5 GSI上是有经验的.该应用程序可以与目标sdk 28正常运行，而无需进行任何更改.

P.S: This is experienced on Android Q DP5 GSI with target SDK 29. The app works fine with target sdk 28 without any changes.

推荐答案

您不会忘记添加权限< uses-permission android:name ="android.permission.FOREGROUND_SERVICE"/> 进入 AndroidManifest.xml 吗?

Don't you forget to add permission <uses-permission android:name="android.permission.FOREGROUND_SERVICE" /> into AndroidManifest.xml ?

更新

请确保先调用 startForeground() ，然后再 getMediaProjection()！

Make sure you call startForeground() before getMediaProjection()!

最好的解决方案是在没有任何条件的情况下从 onCreate()调用 startForeground()，在通知中显示某种默认消息.然后，您可以执行逻辑并随时通过更新的通知调用 NotificationManager.notify().

The best solution is to call startForeground() from onCreate() without any conditions, displaying some sort of default messages in notification. Then you can execute your logic and call NotificationManager.notify() with updated notification at any time.

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