Android + Xamarin推送通知自定义声音将无法播放

Question

I've been working with the simple concept of playing a custom sound in my Android Xamarin app, but no matter what I try the sound will not play.

I have created a "raw" folder under Resources, and added an appropriate sound file. I have made sure that file is being built as an Android resource.

Here's my code:

// note I have also tried just /raw/NotificationSound, /integeridofresource and many other formats
string sSoundUrl = "android.resource://" + AppGlobals.PackageName + "/raw/NotificationSound.wav";

Notification nNotification = new Notification.Builder(this.Activity).SetSmallIcon(Resource.Drawable.AppIcon)
                .SetContentTitle("Test title")
                .SetContentText("Hello notifications")
                .SetAutoCancel(true)
                .SetSound(Android.Net.Uri.Parse(sSoundUrl)).Build();

// I have tried 0, All, NotificationDefaults.Sound basically all different  combinations
nNotification.Defaults = NotificationDefaults.Lights;

NotificationManager nmNotManager = (NotificationManager)this.Activity.GetSystemService(Context.NotificationService);

nmNotManager.Notify(0, nNotification);

I'm hoping somebody can spot what I'm doing wrong...

Thanks!!!

Answer 1

Looks like you are close, there are just a few subtle differences between your code and what we have working in several Xamarin.Android apps.

I believe the salient differences are that we use the GcmListenerService -derived class as the context rather than this.Activity , we omit the ".wav" extension in the path, we generate a unique-ish id for the notification, and we set an intent.

Here is some code that shows the approach:

        var intent = new Intent(context, typeof(MainActivity));
        intent.PutExtra(MainActivity.GoToAction, action);
        intent.AddFlags(ActivityFlags.ClearTop | ActivityFlags.SingleTop);
        var pushId = DateTime.Now.TimeOfDay.Milliseconds;
        var pendingIntent = PendingIntent.GetActivity(context, pushId, intent, PendingIntentFlags.OneShot);

        // Set custom push notification sound.
        var pathToPushSound = "android.resource://" + context.ApplicationContext.PackageName + "/raw/pushalert";
        var soundUri = Android.Net.Uri.Parse(pathToPushSound);

        var notificationBuilder = new Android.App.Notification.Builder(context)
            .SetSmallIcon(Resource.Drawable.icon_transparent)
            .SetContentTitle(title)
            .SetContentText(message)
            .SetAutoCancel(true)
            .SetSound(soundUri)
            .SetStyle(new Android.App.Notification.BigTextStyle().BigText(message))
            .SetVibrate(new long[] {100, 1000, 100})
            .SetLights(Android.Resource.Color.HoloOrangeDark, 1, 1)
            .SetContentIntent(pendingIntent);

        var notificationManager = (NotificationManager) context.GetSystemService(Context.NotificationService);
        notificationManager.Notify(pushId, notificationBuilder.Build());

Answer 2

Well I think I finally figured it out. If you are having trouble with your sounds I would recommend: 1) Create a Media Player object like I did and see if it can play your Uri 2) Check to make sure you have the right defaults set for the Notification object. In my case I set Defaults to 0 and it played the sound...