Hi Erel .
Thanks for replying , solved like this in Main activity ,
B4X:
Sub Ptt_Action
Broadcast.Initialize("BR")
Broadcast.SetPriority(2147483647)
Broadcast.registerReceiver("android.intent.action.PTT.down")
Broadcast.registerReceiver("android.intent.action.PTT.up")
End Sub
Sub BR_OnReceive(Action As String, Extras As Object)
Log(Action)
CallSub2(PTT_Control,"PTT_Intent",Action)
End Sub