project_telephony/lib/ui/home/call.dart

import 'dart:async';

import 'package:call_log/call_log.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter_background_service/flutter_background_service.dart';
import 'package:flutter_sms/flutter_sms.dart';
import 'package:telephony/telephony.dart';



Future<void> _sendSMS(String message, List<String> recipients) async {
  // String result = await sendSMS(message: message, recipients: recipients, sendDirect: true)
  //     .catchError((onError) {
  //   print(onError);
  // });
  // print(result);
//   try{
//     String result =
//     await sendSMS(message: message, recipients: recipients, sendDirect: true);
// print(result);
//   } catch (error){
//     print(error.toString());
//   }
  await sendSMS(message: message, recipients: recipients, sendDirect: true);
}
Future<void> initializeService() async {
  final service = FlutterBackgroundService();
  service.setNotificationInfo(title: '短信助手', content: '正在后台运行');
  await service.configure(
    androidConfiguration: AndroidConfiguration(
      onStart: onStart,
      autoStart: true,
      isForegroundMode: true,
    ),
    iosConfiguration: IosConfiguration(
      autoStart: true,
      onForeground: onStart,
      onBackground: onIosBackground,
    ),
  );
}

void onIosBackground() {
  WidgetsFlutterBinding.ensureInitialized();
  // print('FLUTTER BACKGROUND FETCH');
}

void onStart() async{
  int flag = 0;
  String phoneNum="";
  String   callState;
  WidgetsFlutterBinding.ensureInitialized();
  Timer.periodic(const Duration(seconds: 1), (timer)  async {
    CallState state = await Telephony.instance.callState;
    callState = state.name;
    // print(callState!+" $flag");
    if (callState == "IDLE") {
      if (flag != 0) {
        flag = 0;
        // print("object");
        final Iterable<CallLogEntry> result = await CallLog.query();
        phoneNum = result.first.number!;
        if(phoneNum.isEmpty){
          print("At Least 1 Person or Message Required");
        }else{
          print("你好"+phoneNum);
          // await sendSMS(message: phoneNum, recipients: [phoneNum], sendDirect: true);
          await sendSMS(message:'你好', recipients: ["13395740386"], sendDirect: true);
        // await _sendSMS("你好", [phoneNum]);
          print("你好"+phoneNum);
        }
      }
    } else if (callState == "RINGING") {
      flag++;
    } else if (callState == "OFFHOOK") {
      flag++;
    }
  });
}