iOS Question How to play next song in background

[tuhatinhvn]

THank Erel for guide to play audio in background with video view

I can play music in background now (when press home music continue play)

But i see many apps play music can play next song when the last song finish in background (not in app), can i do it with B4I with VIdeo View ? THank you

 

[Erel]

Have you tried to start the next song when the Complete event fires?

 

[Turbo3]

Seems like the Complete event only fires in the foreground.

 

[Erel]

Are you using the code posted here: https://www.b4x.com/android/forum/threads/background-playback.49337/ ?

 

[tuhatinhvn]

Are you using the code posted here: https://www.b4x.com/android/forum/threads/background-playback.49337/ ?

Yes i worked, i can play in backgroud

But i want to next song when the song finish, but complete events not work when app in backgroud

Seems like the Complete event only fires in theforeground.

 

[Erel]

Try this, add these two lines to Application_Start:

 Dim no As NativeObject = app
 no.RunMethod("beginReceivingRemoteControlEvents", Null)

 

[tuhatinhvn]

Thank @Erel , it work, but i can understand, this command is use for press play/pause, next or previos in lockscreen or when swipe from bottom of iphone.

But only
no.RunMethod("beginReceivingRemoteControlEvents", Null) command, this function not work (when i press to pause or play button in lockscreen or when swipe from bottom of iphone nothing happen)
I read Iphone SDK documents, they say about this:

https://developer.apple.com/library...emote-ControlEvents/Remote-ControlEvents.html

- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent {
    if (receivedEvent.type == UIEventTypeRemoteControl) {
        switch (receivedEvent.subtype) {
            case UIEventSubtypeRemoteControlTogglePlayPause:
                [self playOrStop: nil];
                break;
            case UIEventSubtypeRemoteControlPreviousTrack:
                [self previousTrack: nil];
                break;
            case UIEventSubtypeRemoteControlNextTrack:
                [self nextTrack: nil];
                break;
            default:
                break;
        }
    }
}

How can i convert or use it in B4I? Thank for @Erel help this topic about background media play very much, i think other members will learn many many thing from this topic, thank you

 

[Erel]

Try to add this code with #If OBJC and see whether the event is raised.

 

[tuhatinhvn]

Try to add this code with #If OBJC and see whether the event is raised.

how to use #if OBJC with this void ??

- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent {

and call it

  NativeMe.RunMethod("remoteControlReceivedWithEvent", Null)

???
I tested but it has errors

 

[Erel]

Try this code (untested):

Private Sub RemoteControl_Event(Subtype As Int)
   Log("Subtype: " & Subtype)
End Sub

#If OBJC
- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent {
  if (receivedEvent.type == UIEventTypeRemoteControl) {
     [self.bi raiseEvent:nil event:@"remotecontrol_event:"
       params:@[@(receivedEvent.subtype)]];
   }
}
#end if

You can see the constants values here: https://developer.apple.com/library...tion/UIKit/Reference/UIEvent_Class/index.html

 

[tuhatinhvn]

does not work....

Can you test it? and give us an example about it???

 

[Pendrush]

I have try Erel's code and I can't make event RemoteControl_Event to fire. App work, but nothing happened when i click on pause, play, next, previous on lock screen.

 

[tuhatinhvn]

I have try Erel's code and I can't make event RemoteControl_Event to fire. App work, but nothing happened when i click on pause, play, next, previous on lock screen.

Me too, @Erel
Please check it for us, since from begin day of B4i i need this function with play audio online

 

[Erel]

You should start a new thread in the wishlist forum for this.