代码之家 › 专栏 › 技术社区 › Nostromo

有人打电话时收到通知

xamarin.android xamarin.forms android

0

Nostromo · 技术社区 · 7 年前

如果我理解正确的话,第一个包含Android特有的代码,第二个包含可以在Android、iOS或Windows Phone中使用的代码。

我的解决方案在Android仿真的调试模式下运行,现在我想在有来电的时候得到通知,我想得到打电话给我的电话号码。

Google告诉我,我需要创建一个继承自 BroadcastReceiver 并覆盖 OnReceive

我找不到关于这门课该怎么办的任何信息?在哪里实例化它?在我的“AndroidApp1”项目中,我如何得到通知和电话号码以作出反应?

这是我的源代码 (摘自互联网):

[BroadcastReceiver(Enabled = true, Exported = false)]
[IntentFilter(new[] { "android.intent.action.PHONE_STATE" })]
public class IncomingCallReceiver : BroadcastReceiver
{
    public override void OnReceive(Context context, Intent intent)
    {
        // ensure there is information
        if (intent.Extras != null)
        {
            // get the incoming call state
            string state = intent.GetStringExtra(TelephonyManager.ExtraState);

            // check the current state
            if (state == TelephonyManager.ExtraStateRinging)
            {
                // read the incoming call telephone number...
                string telephone = intent.GetStringExtra(TelephonyManager.ExtraIncomingNumber);
                // check the reade telephone
                if (string.IsNullOrEmpty(telephone))
                    telephone = string.Empty;
            }
            else if (state == TelephonyManager.ExtraStateOffhook)
            {
                // incoming call answer
            }
            else if (state == TelephonyManager.ExtraStateIdle)
            {
                // incoming call end
            }
        }
    }
}

3 回复 | 直到 7 年前

1

0

Ramesh Yankati 7 年前

您需要为呼叫状态注册brodcast接收器。

  <action android:name="android.intent.action.PHONE_STATE" />
  <action android:name="android.intent.action.NEW_OUTGOING_CALL" />

并在获取广播事件后创建通知。

确保已定义权限。

 <uses-permission android:name="android.permission.READ_PHONE_STATE"/>

2

0

Ramesh Yankati 7 年前

        /**
         * Listener to detect incoming calls. 
         */
        private class CallStateListener extends PhoneStateListener {
           @Override
           public void onCallStateChanged(int state, String incomingNumber) {
             switch (state) {
               case TelephonyManager.CALL_STATE_RINGING:
               // called when someone is ringing to this phone

             Toast.makeText(ctx, "Incoming: "+incomingNumber, 
               Toast.LENGTH_LONG).show();
               break;

           }
         }


      You can register the lister for incoming call events.
      tm = (TelephonyManager) ctx.getSystemService(Context.TELEPHONY_SERVICE);
      tm.listen(callStateListener, PhoneStateListener.LISTEN_CALL_STATE);

     Here is the more info 
     https://stackoverflow.com/questions/9684866/how-to-detect-when-phone-is-answered-or-rejected

3

0

Nostromo 7 年前

我终于向前迈进了一步。我创建了一个类 StateListener 继承自 PhoneStateListener

public class StateListener : PhoneStateListener
{
    public override void OnCallStateChanged(CallState state, string incomingNumber)
    {
        base.OnCallStateChanged(state, incomingNumber);

        switch (state)
        {
            case CallState.Ringing:
                break;
            case CallState.Offhook:
                break;
            case CallState.Idle:
                break;
        }
    }
}

然后我在 OnCreate MainActivity 使用以下三行代码创建Android特定项目的类:

StateListener phoneStateListener = new StateListener();
TelephonyManager telephonyManager = (TelephonyManager)GetSystemService(Context.TelephonyService);
telephonyManager.Listen(phoneStateListener, PhoneStateListenerFlags.CallState);

现在当我在 case switch (state) OnCallStateChanged 它们断了,但是 incomingNumber

所以,这将是我的下一步,得到呼叫号码。