iOS Question How to pause background music on incoming call

Pendrush · Jul 21, 2021

I have app with player like in this example.
More and more users report same problem: music continue to play in background when they receive call.
I have found some solution with observer here, question is how to implement this in B4i.

My main goal is to pause player in background on call (incoming and outgoing).

Erel · Jul 21, 2021

Start with this code in the main module:

B4X:

#if OBJC
@end
@interface B4IViewController (Interruption)
@end
@implementation B4IViewController (Interruption)
- (void) addInterruption {
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(interruption:) name:AVAudioSessionInterruptionNotification object:nil];
}
- (void) interruption:(NSNotification*) notification {
    NSLog(@"test");
}
#end if

And you need to add the listener with:

B4X:

B4XPages.GetNativeParent(Me).As(NativeObject).RunMethod("addInterruption", Null)

Or with the Page object if not B4XPages.

Do you see the "test" log?

Pendrush · Jul 22, 2021

Im getting error: Main - 236: Unknown member: getnativeparent

B4X:

Private pg As Page
pg.GetNativeParent(Me).As(NativeObject).RunMethod("addInterruption", Null)

Alexander Stolte · Jul 22, 2021

Pendrush said:
Im getting error: Main - 236: Unknown member: getnativeparent

The page is already the nativeparent.

B4X:

Private pg As Page
pg.As(NativeObject).RunMethod("addInterruption", Null)

Pendrush · Jul 22, 2021

It shoud be:

B4X:

pg.As(NativeObject).RunMethod("addInterruption", Null)

I can see TEST in log when call device.

Pendrush · Jul 22, 2021

I need to implement this:

Swift:

@objc func playerInterruption(notification: NSNotification) {
    guard let userInfo = notification.userInfo,
        let typeValue = userInfo[AVAudioSessionInterruptionTypeKey] as? UInt,
        let type = AVAudioSession.InterruptionType(rawValue: typeValue) else {
            return
    }
    if type == .began {
        self.MusicPauseMethod()
    }else if type == .ended {
        self.MusicPlayMethod()
    }
}

to be able to pause and resume player.

Erel · Jul 23, 2021

Pendrush said:
I can see TEST in log when call device.

That's good.

The previous code I posted was wrong. Untested code:

B4X:

Private Sub Application_Start (Nav As NavigationController)
    NavControl = Nav
    Page1.Initialize("Page1")
    Page1.RootPanel.LoadLayout("Page1")
    NavControl.ShowPage(Page1)
    Me.As(NativeObject).RunMethod("addInterruption", Null)
End Sub

Private Sub Interruption_Notification(Notif As Object)
    Dim State As Int = Notif.As(NativeObject).GetField("userInfo").RunMethod("valueForKey:", Array("AVAudioSessionInterruptionTypeKey")).AsNumber
    Log(State)
End Sub


#if OBJC
- (void) addInterruption {
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(interruption:) name:AVAudioSessionInterruptionNotification object:nil];
}
- (void) interruption:(NSNotification*) notification {
    NSLog(@"interruption");
     [self.bi raiseEvent:nil event:@"interruption_notification:" params:@[notification]];
}
#end if

iOS Question How to pause background music on incoming call

Pendrush

Well-Known Member

Erel

B4X founder

Pendrush

Well-Known Member

Alexander Stolte

Expert

Pendrush

Well-Known Member

Pendrush

Well-Known Member

Erel

B4X founder

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iOS Question How to pause background music on incoming call

Pendrush

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Pendrush

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Alexander Stolte

Expert

Pendrush

Well-Known Member

Pendrush

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Erel

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