CallScreeningService - Disconnect call after few seconds - Android 10

user_1979347 0
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Trying to disconnect an incoming call after few seconds of ringing on Android 10. Using CallScreeningService for filtering an incoming call.

@RequiresApi(Build.VERSION_CODES.N)
class MyCallScreeningService :
  CallScreeningService() {


  @RequiresApi(Build.VERSION_CODES.Q)
  override fun onScreenCall(details: Call.Details?) {
    if (details?.callDirection == Call.Details.DIRECTION_INCOMING) {
      val phoneNumber = details.handle.schemeSpecificPart
      val blockedList = Paper.book().read(Constants.FIELD_BLOCKED_LIST, ArrayList<String>())
      if (blockedList.contains(phoneNumber)) {
        disconnectCall(details, phoneNumber)
      } 
    }
  }

  private fun disconnectCall(details: Call.Details, phoneNumber: String) {
    Handler().postDelayed({
      respondToCall(details, buildResponse())
    }, 3000L)
  }

  private fun buildResponse(): CallResponse {
    return CallResponse.Builder()
      .setRejectCall(true)
      .setDisallowCall(true)
      .setSkipNotification(true)
      .setSkipCallLog(true)
      .build()
  }
}

Problem is, if I set the handler time too low, the call gets disconnected without ringing on receiver's side. Although, if I set it higher like 6 secs, then the ringing notification shows, but disconnection doesn't work.

android-10.0 call telephonymanager telephony android
1 Answers

CallScreeningService executes onScreenCall method before the phone rings.

You have 5 seconds to decide either to allow phone to ring or to block the call. If you don't return CallResponse in 5 seconds time, Telephony API will disregard call to your onScreenCall and let the phone ring.

Using CallScreeningService it is not possible to block phone call after few seconds of ringing.

user_1031760
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