android - 奇怪的应用程序行为 我的应用程序有时只是行为异常

Question

所以最近我刚刚使用颤振制作了我的第一个应用程序。该应用程序是关于穆斯林祈祷时间表。

我自己制作了这个应用程序，当我遇到这样的问题时没有人支持我。希望有人可以帮助我解决这个问题。

所以方法是从 Web API 收集计划数据并将其编码为 Json 模式到我的应用程序，但有时我的应用程序只是卡在加载屏幕上，不会转到另一个屏幕/用户界面。即使我已经检查了互联网连接，如果互联网连接在某个时间跨度很慢，使用超时方法转到另一个屏幕，如果连接失败，有时它就不会去。

这个问题实际上很少发生，但最终会导致问题并降低用户对应用程序的体验。这是我认为有问题的代码：

    import 'dart:convert';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:http/http.dart';
import 'package:intl/intl.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:geolocator/geolocator.dart' as geo;
import 'package:yaumi/services/shared/preferenceServices.dart';
//import 'package:location/location.dart';

class FirstLoad extends StatefulWidget {
  const FirstLoad();

  @override
  _FirstLoadState createState() => _FirstLoadState();
}

class _FirstLoadState extends State<FirstLoad> {
  final geo.GeolocatorPlatform _geolocatorPlatform = geo.GeolocatorPlatform.instance;
  bool serviceEnabled;
  geo.LocationPermission _permission;
  geo.Position _currentPosition;

  //Location _location;
  var lat;
  var lon;
  var ele;
  var date;
  
  bool isApiSatu = true;
  bool isConnected = true;

  final String tahun = DateTime.now().year.toString();
  final String bulan = DateTime.now().month.toString();
  final String tanggal = DateTime.now().day.toString();

  String sharedShubuh= '';
  String sharedDhuhur= '';
  String sharedAshar= '';
  String sharedMaghrib= '';
  String sharedIsya= '';

  void setupsWaktuShalat() async {
    //serviceEnabled = await location.serviceEnabled();
    // if (!serviceEnabled) {
    //   serviceEnabled = await location.requestService();
    //   if (!serviceEnabled) {
    //     return print('Service Permission is not given');
    //   }
    // }

    //TODO: Untuk HP China seperti Xiaomi atau Huawei biasanya harus setting manual dulu pengaturan batterai nya

    // _permissionGranted = await location.hasPermission();
    // if (_permissionGranted == PermissionStatus.denied) {
    //     _permissionGranted = await location.requestPermission();
    //     if (_permissionGranted != PermissionStatus.granted) {
    //       return print('Permission request not granted');
    //     }
    //   }

    

    

    serviceEnabled = await _geolocatorPlatform.isLocationServiceEnabled();
    if(!serviceEnabled) {
      return print('_geolocator service not enabled');
    }

    _permission = await _geolocatorPlatform.checkPermission();
    if(_permission==geo.LocationPermission.denied){
      _permission = await _geolocatorPlatform.requestPermission();
      if (_permission==geo.LocationPermission.denied) {
        return print('permission not granted');
      }
    }

    await geo.Geolocator
      .getCurrentPosition(desiredAccuracy: geo.LocationAccuracy.medium, forceAndroidLocationManager: true)
      .timeout(Duration(seconds: 5))
      .then((geo.Position position) {
        setState(() {
          //print('position: $position');
          _currentPosition = position;
          print('_currentPosition: $_currentPosition');
        });
      }).catchError((e) {
        print(e);
      });

    if (_currentPosition != null) {
      lat = _currentPosition.latitude;
      lon = _currentPosition.longitude;
    } else {
      lat = '-6.864008';
      lon = '107.591192';
    }
    
    //print('$lat and $lon');
    ele = 333;
    date = DateFormat('yyyy-MM-dd').format(new DateTime.now());

    //Navigator.pushReplacementNamed(context, '/home');

    try {
      final result = await InternetAddress.lookup('example.com');
      if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {
        //print('connected');
        isConnected = true;
      }
    } on SocketException catch (_) {
      //print('not connected');
      isConnected = false;
    }

    if (isConnected) {
      try {
        Response response =     
          await get(
            Uri.parse(
              'https://api.pray.zone/v2/times/day.json?longitude=$lon&latitude=$lat&elevation=$ele&date=$date'
            )
          ).timeout(Duration(seconds: 10));
        
        Map map = jsonDecode(response.body);
        //print(map);
        Map _results = map['results'];
        //print(_results);
        List _datetimeList = _results['datetime'];
        Map _datetime = _datetimeList[0];
        Map _times = _datetime['times'];

        setState(() {
          sharedShubuh = _times['Fajr'];
          sharedDhuhur = _times['Dhuhr'];
          sharedAshar = _times['Asr'];
          sharedMaghrib = _times['Maghrib'];
          sharedIsya = _times['Isha'];
        });

        try {
          await PreferenceServices.setShubuh(sharedShubuh);
          await PreferenceServices.setDhuhur(sharedDhuhur);
          await PreferenceServices.setAshar(sharedAshar);
          await PreferenceServices.setMaghrib(sharedMaghrib);
          await PreferenceServices.setIsya(sharedIsya);
        } catch (e) {
          print('error karena $e');
        }

        //print(_times);
        Navigator.pushReplacementNamed(context, '/home', arguments: {
          'Shubuh': sharedShubuh,
          'Dhuhur': sharedDhuhur,
          'Ashar': sharedAshar,
          'Maghrib': sharedMaghrib,
          'Isya': sharedIsya,
          'Connection': true
        });
      } catch (e) {
        try {
          setState(() {
            isApiSatu = false;        
          });
          Response response =     
            await get(
              Uri.parse(
                'https://api.myquran.com/v1/sholat/jadwal/1219/$tahun/$bulan/$tanggal'
              )
            ).timeout(Duration(seconds: 10));
          
          Map map = jsonDecode(response.body);
          print(map);
          Map _data = map['data'];
          Map _jadwal = _data['jadwal'];
          print(_jadwal);

          setState(() {
            sharedShubuh = _jadwal['subuh'];
            sharedDhuhur = _jadwal['dzuhur'];
            sharedAshar = _jadwal['ashar'];
            sharedMaghrib = _jadwal['maghrib'];
            sharedIsya = _jadwal['isya'];
          });

          Navigator.pushReplacementNamed(context, '/home', arguments: {
            'Shubuh': sharedShubuh,
            'Dhuhur': sharedDhuhur,
            'Ashar': sharedAshar,
            'Maghrib': sharedMaghrib,
            'Isya': sharedIsya,
            'Connection': true
          });
        } catch (e) {
          print(e);
          Navigator.pushReplacementNamed(context, '/home', arguments: {
            'Shubuh': sharedShubuh,
            'Dhuhur': sharedDhuhur,
            'Ashar': sharedAshar,
            'Maghrib': sharedMaghrib,
            'Isya': sharedIsya,
            'Connection': true
          });
        }
      }
    } else {
      //print('sharedDhuhur:$sharedDhuhur');
      Navigator.pushReplacementNamed(context, '/home', arguments: {
        'Shubuh': sharedShubuh,
        'Dhuhur': sharedDhuhur,
        'Ashar': sharedAshar,
        'Maghrib': sharedMaghrib,
        'Isya': sharedIsya,
        'Connection': false
      });
    }
    
    
  }

  @override
  void initState() {
    //Navigator.pushReplacementNamed(context, '/home');
    PreferenceServices.getShubuh().then((e) =>
      sharedShubuh = e.toString()
    );
    PreferenceServices.getDhuhur().then((e) =>
      sharedDhuhur = e.toString()
    );
    PreferenceServices.getAshar().then((e) =>
      sharedAshar = e.toString()
    );
    PreferenceServices.getMaghrib().then((e) =>
      sharedMaghrib = e.toString()
    );
    PreferenceServices.getIsya().then((e) =>
      sharedIsya = e.toString()
    );
    
    setupsWaktuShalat();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        gradient: LinearGradient(
              begin: Alignment.topRight,
              end: Alignment.bottomLeft,
              colors: [Color(0xFF6441A5), Color(0xFF2a0845)]),
      ),
      child: Center(
        child: SpinKitFadingCube(
          color: Colors.white,
          size: 50.0,
        ),
      ),
    );
  }
}

这是我的应用程序的链接，用于进一步检查应用程序：

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标签： androidflutterapidart