Xamarin Android 使用 SetSound 作为通知通道在通知上播放自定义声音

Question

我已经浪费了至少一天的时间来尝试完成这项工作。我正在尝试播放收到通知后放置在 Resources/raw 中的 mp3 文件。我不知道如何获取 Uri。我的问题是：

1.要播放自定义文件，您必须将其放置在 Resources/raw 中，还是也可以放置在 Xamarin Android 项目下的 Assets/Sounds 中。

2.如何根据mp3文件所在位置正确获取Uri。

这是我的代码：

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);
        }

    }

Answer 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);