Принять звонок в службу переднего плана? ⇐ Android

[Anonymous]

Использование пакета SIP_UA для VoIP
, чтобы сохранить Connect, когда приложение закрыто, создал службу переднего плана и зарегистрировал пользователя SIP, и он работает нормально, чтобы получить уведомление о входящем вызове в завершенном состоянии. Class = "Lang-Dart PrettyPrint-Override"> void _handleAccept() async {
var call = CallStateInit().getCall;
bool remoteHasVideo = call!.remote_has_video;
final mediaConstraints = {
'audio': true,
'video':
remoteHasVideo
? {
'mandatory': {
'minWidth': '640',
'minHeight': '480',
'minFrameRate': '30',
},
'facingMode': 'user',
'optional': [],
}
: false,
};
MediaStream mediaStream;

if (kIsWeb && remoteHasVideo) {
mediaStream = await navigator.mediaDevices.getDisplayMedia(
mediaConstraints,
);
MediaStream userStream = await navigator.mediaDevices.getUserMedia(
mediaConstraints,
);
mediaStream.addTrack(userStream.getAudioTracks()[0], addToNative: true);
} else {
if (!remoteHasVideo) {
mediaConstraints['video'] = false;
}
mediaStream = await navigator.mediaDevices.getUserMedia(mediaConstraints);// here the error comes
}

call!.answer(
helper!.buildCallOptions(!remoteHasVideo),
mediaStream: mediaStream,
);
}
< /code>
error logs :
E/MethodChannel#FlutterWebRTC.Method(23398): Failed to handle method call
E/MethodChannel#FlutterWebRTC.Method(23398): java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Intent android.app.Activity.registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter)' on a null object reference
E/MethodChannel#FlutterWebRTC.Method(23398): at com.cloudwebrtc.webrtc.video.camera.DeviceOrientationManager.start(DeviceOrientationManager.java:57)
E/MethodChannel#FlutterWebRTC.Method(23398): at com.cloudwebrtc.webrtc.video.camera.CameraUtils.(CameraUtils.java:48)
E/MethodChannel#FlutterWebRTC.Method(23398): at com.cloudwebrtc.webrtc.MethodCallHandlerImpl.initialize(MethodCallHandlerImpl.java:176)
E/MethodChannel#FlutterWebRTC.Method(23398): at com.cloudwebrtc.webrtc.MethodCallHandlerImpl.onMethodCall(MethodCallHandlerImpl.java:345)
E/MethodChannel#FlutterWebRTC.Method(23398): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:267)
E/MethodChannel#FlutterWebRTC.Method(23398): at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:292)
E/MethodChannel#FlutterWebRTC.Method(23398): at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:319)
E/MethodChannel#FlutterWebRTC.Method(23398): at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(D8$$SyntheticClass:0)
E/MethodChannel#FlutterWebRTC.Method(23398): at android.os.Handler.handleCallback(Handler.java:958)
E/MethodChannel#FlutterWebRTC.Method(23398): at android.os.Handler.dispatchMessage(Handler.java:99)
E/MethodChannel#FlutterWebRTC.Method(23398): at android.os.Looper.loopOnce(Looper.java:230)
E/MethodChannel#FlutterWebRTC.Method(23398): at android.os.Looper.loop(Looper.java:319)
E/MethodChannel#FlutterWebRTC.Method(23398): at android.app.ActivityThread.main(ActivityThread.java:8893)
E/MethodChannel#FlutterWebRTC.Method(23398): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#FlutterWebRTC.Method(23398): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:608)
E/MethodChannel#FlutterWebRTC.Method(23398): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
E/flutter (23398): [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: Unable to getUserMedia: Attempt to invoke virtual method 'android.content.Intent android.app.Activity.registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter)' on a null object reference
E/flutter (23398): #0 MediaDeviceNative.getUserMedia (package:flutter_webrtc/src/native/mediadevices_impl.dart:48:7)


Подробнее здесь: https://stackoverflow.com/questions/795 ... nd-service