android-studio - 将考虑丢失的 Gc 直方图窗口的数量从 101 减少到 100

Question

我正在尝试构建一个天气应用程序，作为我正在学习的 Flutter 类(class)的一部分，并显示一条消息:

Reducing the number of considered missed Gc histogram windows from 101 to 100

出现在我的控制台中，当我期望天气数据时。有没有人熟悉这个消息？
我正在粘贴下面涉及的屏幕中的代码，以供引用。
location_screen.dart

import 'package:flutter/material.dart';
import 'package:clima/utilities/constants.dart';

class LocationScreen extends StatefulWidget {
  LocationScreen({this.locationWeather});
  final locationWeather;
  @override
  _LocationScreenState createState() => _LocationScreenState();
}

class _LocationScreenState extends State<LocationScreen> {
  @override
  void initState() {
    super.initState();
    print(widget.locationWeather);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        decoration: BoxDecoration(
          image: DecorationImage(
            image: AssetImage('images/location_background.jpg'),
            fit: BoxFit.cover,
            colorFilter: ColorFilter.mode(
                Colors.white.withOpacity(0.8), BlendMode.dstATop),
          ),
        ),
        constraints: BoxConstraints.expand(),
        child: SafeArea(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: <Widget>[
                  FlatButton(
                    onPressed: () {},
                    child: Icon(
                      Icons.near_me,
                      size: 50.0,
                    ),
                  ),
                  FlatButton(
                    onPressed: () {},
                    child: Icon(
                      Icons.location_city,
                      size: 50.0,
                    ),
                  ),
                ],
              ),
              Padding(
                padding: EdgeInsets.only(left: 15.0),
                child: Row(
                  children: <Widget>[
                    Text(
                      '32°',
                      style: kTempTextStyle,
                    ),
                    Text(
                      '☀️',
                      style: kConditionTextStyle,
                    ),
                  ],
                ),
              ),
              Padding(
                padding: EdgeInsets.only(right: 15.0),
                child: Text(
                  "It's 🍦 time in San Francisco!",
                  textAlign: TextAlign.right,
                  style: kMessageTextStyle,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}
/*

double temperature = decodedData['main']['temp'];
int condition = decodedData['weather'][0]['id'];
String cityName = decodedData['name'];
*/

loading_screen.dart

import 'package:clima/screens/location_screen.dart';
import 'package:clima/services/networking.dart';
import 'package:flutter/material.dart';
import 'package:clima/services/location.dart';
import 'package:clima/services/networking.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'location_screen.dart';

const apiKey = 'APIKEY';

class LoadingScreen extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _LoadingScreenState();
  }
}

class _LoadingScreenState extends State<LoadingScreen> {
  double latitude;
  double longitude;

  @override
  void initState() {
    super.initState();
    getLocation();
  }

  void getLocationData() async {
    Location location = Location();
    await location.getCurrentLocation();
    latitude = location.latitude;
    longitude = location.longitude;
    NetworkHelper networkHelper = NetworkHelper(
        'https://api.openweathermap.org/data/2.5/weather?lat=$latitude&lon=$longitude&appid=$apiKey');
    var weatherData = await networkHelper.getData();

    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) {
          return LocationScreen(
            locationWeather: weatherData,
          );
        },
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: SpinKitDoubleBounce(
          color: Colors.white,
          size: 100.0,
        ),
      ),
    );
  }
}

网络.dart

import 'package:http/http.dart' as http;
import 'dart:convert';

class NetworkHelper {
  NetworkHelper(this.url);

  final String url;

  Future getData() async {
    http.Response response = await http.get(url);
    if (response.statusCode == 200) {
      String data = response.body;

      return jsonDecode(data);
    } else {
      print(response.statusCode);
    }
  }
}

Answer 1

你应该断开你的应用程序。如果您使用的是设备或模拟器，请将其从设备或模拟器中删除，然后再次冷启动您的应用程序。它会工作得很好。
它在我的设备上对我有用。