当我接听电话时如何获得活动

你能帮我理解如何检测是否接听来电（我需要记录从接听到接听的呼叫）？ 我可以检测到来电但不是外拨。 所以请帮忙。

Answer 1

使用TelephonyManager.ActionPhoneStateChanged监视TelephonyManager状态，在收到TelephonyManager.ExtraStateIdle您知道电话无线电现在何时空闲（没有正在进行的呼叫）。

入站和出站BroadcastReceiver示例：

 [BroadcastReceiver(Name = "com.sushhangover.OutgoingCallBroadcastReceiver")] [IntentFilter(new[] { Intent.ActionNewOutgoingCall, TelephonyManager.ActionPhoneStateChanged })] public class OutgoingCallBroadcastReceiver : BroadcastReceiver { public override void OnReceive(Context context, Intent intent) { switch (intent.Action) { case Intent.ActionNewOutgoingCall: var outboundPhoneNumber = intent.GetStringExtra(Intent.ExtraPhoneNumber); Toast.MakeText(context, $"Started: Outgoing Call to {outboundPhoneNumber}", ToastLength.Long).Show(); break; case TelephonyManager.ActionPhoneStateChanged: var state = intent.GetStringExtra(TelephonyManager.ExtraState); if (state == TelephonyManager.ExtraStateIdle) Toast.MakeText(context, "Phone Idle (call ended)", ToastLength.Long).Show(); else if (state == TelephonyManager.ExtraStateOffhook) Toast.MakeText(context, "Phone Off Hook", ToastLength.Long).Show(); else if (state == TelephonyManager.ExtraStateRinging) Toast.MakeText(context, "Phone Ringing", ToastLength.Long).Show(); else if (state == TelephonyManager.ExtraIncomingNumber) { var incomingPhoneNumber = intent.GetStringExtra(TelephonyManager.ExtraIncomingNumber); Toast.MakeText(context, $"Incoming Number: {incomingPhoneNumber}", ToastLength.Long).Show(); } break; default: break; } } } 

注意：确保为ReadPhoneState和ProcessOutgoingCalls添加权限，以使此示例ReadPhoneState 。