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Baseflow / XamarinMediaManager

Cross platform Xamarin plugin to play and control Audio and Video
https://baseflow.com
MIT License
769 stars 306 forks source link

Notification tutorial #391

Closed dupuisdavid closed 5 years ago

dupuisdavid commented 6 years ago

Hello guys, I'm a beginner in Xamarin and I need a full sample for notification control panel like in Hanselman application. I have examined this app but don't understand how it succeeds to display play/pause/stop button controls in the notification panel. Can you help me?

Regards.

thomcuddihy commented 6 years ago

For which platform are you curious about?

dupuisdavid commented 6 years ago

Android and iOS.

thomcuddihy commented 6 years ago

I would draw your attention to the MediaNotificationManagerImplementation classes for those platforms then: Android iOS

Within the Android class, there is a method called AddActionButtons. You can see there that it is calling AddAction on the NotificationCompat.Builder object _builder to add either a play or pause icon (depending on mediaIsPlaying), and previous/next icons on whether the MediaQueue has previous or next items. More information on NotificationCompat can be found on the Android spec here and the Xamarin spec here. There is a general overview of it for Android here, though the Android MediaNotificationManagerImplementation class in this project is arguably a better method to learn about media specific notifications. For an Oreo compatible MediaNotificationManagerImplementation class, please see here.

For iOS, you can immediately see that the MediaNotificationManagerImplementation class is inheriting from the RemoteControlNotificationManager class, that handles calls to UIApplication to either begin or end receiving remote control events. Those events should be handled by overriding UIApplication.RemoteControlReceived(UIEvent) as mentioned in the README.md to this project. In terms of displaying the media notification, the MediaNotificationManagerImplementation class uses the MPNowPlayingInfoCenter object to notify iOS regarding the media content it is playing (see here). Specifically, see the CreateNowPlayingInfo method, which populates a MPNowPlayingInfo object with the media metadata. This page may help explain the bare minimum required, but again the code in this project is quite useful to examine. In this platform, the format of the notification and the media buttons presented on the notification are handled by iOS, ostensibly for app consistency.

dupuisdavid commented 6 years ago

Thank you!

modplug commented 6 years ago

@thomcuddihy Can you add that to the Wiki?

thomcuddihy commented 6 years ago

Um, yeah no worries @modplug. Where the wiki at?

martijn00 commented 6 years ago

I don't have time to fix up the missing pieces, or the other feature requests right now. I'm available for hire to fix this up and integrate changes into your project if you or anyone else wants. Drop me an email or message and we can talk about it.