Xamarin Android use SetSound for Notification Channel to play custom sound on notification

问题

I have I have been wasting at least a day trying to make this work. I am trying to play an mp3 file that i placed in Resources/raw once a notification is received. I do not know exactly how to get the Uri. My questions please are:

1.To play a custom file do you have to place it in Resources/raw or can it be also in Assets/Sounds under the Xamarin Android project.

2.How do i get the Uri correctly based on where the mp3 file resides.

This is my code:

private void createNotificationChannel()
        {
            var channelName = GetString(Resource.String.noti_chan_urgent);
            var channelDescription = GetString(Resource.String.noti_chan_urgent_description);

            // set the vibration patterm for the channel
            long[] vibrationPattern = { 100, 200, 300, 400, 500, 400, 300, 200, 400 };

            // Creating an Audio Attribute
            var alarmAttributes = new AudioAttributes.Builder().SetUsage(AudioUsageKind.Alarm).Build();

            // Create the uri for the alarm file
            var alarmUri = Android.Net.Uri.Parse("MyApp.Android/Resources/raw/alarm.mp3");   // this must be wrong because its not working


            // create chan1  which is the urgent notifications channel
            var chan1 = new NotificationChannel(PRIMARY_CHANNEL_ID, channelName, NotificationImportance.High)
            {
                Description = channelDescription
            };


            // set the channel properties
            chan1.EnableLights(true);
            chan1.LightColor = Color.Red;
            chan1.EnableVibration(true);   
            chan1.SetVibrationPattern(vibrationPattern);
            chan1.SetSound(alarmUri, alarmAttributes);
            chan1.SetBypassDnd(true);
            chan1.LockscreenVisibility = NotificationVisibility.Public;


            var manager = (NotificationManager)GetSystemService(NotificationService);
            manager.CreateNotificationChannel(chan1);
        }

    }

回答1:

I figured it out and I hope this will help someone better than getting a downvote for a question, this is how you do it: (Note: Make sure you put your mp3 file in your Xamarin Android project under Resources/raw/soundFile.mp3 and build the file as Android Resource).

Then create the Uri like this:

Android.Net.Uri alarmUri = Android.Net.Uri.Parse(${ContentResolver.SchemeAndroidResource}://{Context.PackageName}/{Resource.Raw.soundFile}");

Create the Alarm Attributes like this:

var alarmAttributes = new AudioAttributes.Builder()
               .SetContentType(AudioContentType.Sonification)
               .SetUsage(AudioUsageKind.Notification).Build();

And finally setSound on the channel itself ONLY from Android Oreo onwards (not on the notification, create the channel at application launch):

chan1.SetSound (alarmUri, alarmAttributes);

回答2:

uri = Android.Net.Uri.Parse( "android.resource://" + Application.Context.PackageName + "/raw/sound2");

only change I had to make. to Fredsomofspeech answer.

android 9. visualstudio 2019 xamarin.forms mobile ios android. sound2.mp3

was running a file android could not play, so make sure download a mp3 file for testing verified to work.

来源：https://stackoverflow.com/questions/51939793/xamarin-android-use-setsound-for-notification-channel-to-play-custom-sound-on-no