When answer mode is auto, play ringing sound for 2 seconds before answering

app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt

@@ -1835,15 +1835,17 @@ class BaresipService: Service() {
             handleIncomingCall(call)
             if (ua.account.answerMode == Api.ANSWERMODE_AUTO) {
                 Log.d(TAG, "Auto-answering external call ${call.callp}")
-                call.answer()
+                Handler(Looper.getMainLooper()).postDelayed({
+                    call.answer()
+                }, 2000)
             }
-        } else {
+        }
+        else
             postServiceEvent(ServiceEvent(
                 "call outgoing",
                 arrayListOf(ua.uap, call.callp),
                 System.nanoTime())
             )
-        }
     }
 
     fun handleExternalCallRemoved(telecomCall: android.telecom.Call) {
@@ -2170,16 +2172,6 @@ class BaresipService: Service() {
         }
     }
 
-    private fun playUnInterrupted(raw: Int, count: Int) {
-        val player = MediaPlayer.create(this, raw)
-        player.setOnCompletionListener {
-            it.stop()
-            it.release()
-            if (count > 1) playUnInterrupted(raw, count - 1)
-        }
-        player.start()
-    }
-
     private fun stopMediaPlayer() {
         mediaPlayer?.stop()
         mediaPlayer?.release()

app/src/main/kotlin/com/tutpro/baresip/ConnectionService.kt

@@ -2,6 +2,8 @@ package com.tutpro.baresip
 
 import android.content.Intent
 import android.net.Uri
+import android.os.Handler
+import android.os.Looper
 import android.telecom.CallAudioState
 import android.telecom.Connection
 import android.telecom.ConnectionRequest
@@ -78,11 +80,12 @@ class ConnectionService : ConnectionService() {
 
         val ua = UserAgent.ofUap(uap)
         if (ua != null) {
+            connection.setRinging()
             if (ua.account.answerMode == Api.ANSWERMODE_AUTO) {
                 Log.d(TAG, "Auto-answering call $callp")
-                connection.onAnswer()
-            } else {
-                connection.setRinging()
+                Handler(Looper.getMainLooper()).postDelayed({
+                    connection.onAnswer()
+                }, 2000)
             }
         }