正确配置Android Studio和Flutter、Dart插件版本 Start a new Flutter project（androidstudio安装flutter插件）

25-02-05 16

本文将分享正确配置AndroidStudio和Flutter、Dart插件版本StartanewFlutterproject的详细内容，并且还将对androidstudio安装flutter插件进行详

本文将分享正确配置Android Studio和Flutter、Dart插件版本 Start a new Flutter project的详细内容，并且还将对androidstudio安装flutter插件进行详尽解释，此外，我们还将为大家带来关于Android Alarm Manager不适用于Flutter Project App、Android Studio & Flutter logs、Android Studio Flutter 调试技巧 Flutter Inspector 提升你的维护开发效率轻松定位复杂嵌套 Widget 代码位置、android studio flutter代理设置问题的相关知识，希望对你有所帮助。

本文目录一览：

正确配置Android Studio和Flutter、Dart插件版本 Start a new Flutter project（androidstudio安装flutter插件）
Android Alarm Manager不适用于Flutter Project App
Android Studio & Flutter logs
Android Studio Flutter 调试技巧 Flutter Inspector 提升你的维护开发效率轻松定位复杂嵌套 Widget 代码位置
android studio flutter代理设置问题

正确配置Android Studio和Flutter、Dart插件版本 Start a new Flutter project（androidstudio安装flutter插件）

有时候在Android Studio Plugins 安装了Fultter、Dart插件，启动Android Studio IDE的时候依然看不到 Start a new Flutter project 菜单。这是因为Flutter、Dart插件要和Androdi Studio的Build版本对应才行。

例如Android Studio的Build版本 Build #AI-193.6911如图：

我们就要在 Jetbrain 的插件市场里寻找对应的 Flutter 插件。

https://plugins.jetbrains.com/

Dart插件版本也同理，只要版本对应，启动Android Studio的时候才会出现 Start a new Flutter project 的菜单。

Android Alarm Manager不适用于Flutter Project App

我在New Flutter应用程序中安装了 Android Alarm Manager插件.我使用插件的示例代码 – 但它在控制台中出错.

请建议如何使android报警管理器插件工作.
如何将Dart的android_alarm_manager集成到应用程序中,以便用户在计划中选择的时间到达时会收到警报？

我使用此链接中的代码：
https://github.com/flutter/plugins/tree/master/packages/android_alarm_manager

//////  main.dart://///////

    import 'dart:isolate';
    import 'package:android_alarm_manager/android_alarm_manager.dart';
    import 'package:Flutter/material.dart';

    void printHello() {
      final DateTime Now = DateTime.Now();
      final int isolateId = Isolate.current.hashCode;
      print("[$Now] Hello,world! isolate=${isolateId} function='$printHello'");
    }
    void main() async {
      final int helloAlarmID = 0;
      await AndroidAlarmManager.initialize();
      runApp(MaterialApp(home: Application()));
      await AndroidAlarmManager.periodic(const Duration(minutes: 1),helloAlarmID,printHello);
    }
    class Application extends StatelessWidget {
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          body: Container(),);
      }
    }


///////////////Application.java/////////////////////

    package io.Flutter.plugins.androidalarmmanagerexample;
    import io.Flutter.app.FlutterApplication;
    import io.Flutter.plugin.common.PluginRegistry;
    import io.Flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
    import io.Flutter.plugins.GeneratedpluginRegistrant;

    public class Application extends FlutterApplication implements PluginRegistrantCallback {
        @Override
        public void onCreate() {
            super.onCreate();

            AlarmService.setPluginRegistrant(this);
        }
        @Override
        public void registerWith(PluginRegistry registry) {
            GeneratedpluginRegistrant.registerWith(registry);
        }
    }



///// When I run this code it gives error in console as given below://////

E/Flutter ( 6831): [ERROR:Flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: PlatformException(error,Attempt to invoke interface method 'void io.Flutter.plugin.common.PluginRegistry$PluginRegistrantCallback.registerWith(io.Flutter.plugin.common.PluginRegistry)' on a null object reference,null)
E/Flutter ( 6831): #0      JSONMethodCodec.decodeEnvelope (package:Flutter/src/services/message_codecs.dart:149:7)
E/Flutter ( 6831): #1      MethodChannel.invokeMethod (package:Flutter/src/services/platform_channel.dart:302:33)
E/Flutter ( 6831): <asynchronous suspension>
E/Flutter ( 6831): #2      AndroidAlarmManager.initialize (package:android_alarm_manager/android_alarm_manager.dart:76:10)
E/Flutter ( 6831): <asynchronous suspension>
E/Flutter ( 6831): #3      main (package:alarmdemo/main.dart:12:29)
E/Flutter ( 6831): <asynchronous suspension>
E/Flutter ( 6831): #4      _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:189:25)
E/Flutter ( 6831): #5      _rootRun (dart:async/zone.dart:1124:13)
E/Flutter ( 6831): #6      _CustomZone.run (dart:async/zone.dart:1021:19)
E/Flutter ( 6831): #7      _runZoned (dart:async/zone.dart:1516:10)
E/Flutter ( 6831): #8      runZoned (dart:async/zone.dart:1500:12)
E/Flutter ( 6831): #9      _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:180:5)
E/Flutter ( 6831): #10     _startIsolate.<anonymous closure> (dart:isolate/runtime/libisolate_patch.dart:300:19)
E/Flutter ( 6831): #11     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
E/Flutter ( 6831): 
E/Flutter ( 6831): [ERROR:Flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: MissingPluginException(No implementation found for method AlarmService.initialized on channel plugins.Flutter.io/android_alarm_manager_background)
E/Flutter ( 6831): #0      MethodChannel.invokeMethod (package:Flutter/src/services/platform_channel.dart:300:7)
E/Flutter ( 6831): <asynchronous suspension>
E/Flutter ( 6831): #1      _alarmManagerCallbackdispatcher (package:android_alarm_manager/android_alarm_manager.dart:49:12)
E/Flutter ( 6831): #2      _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:189:25)
E/Flutter ( 6831): #3      _rootRun (dart:async/zone.dart:1124:13)
E/Flutter ( 6831): #4      _CustomZone.run (dart:async/zone.dart:1021:19)
E/Flutter ( 6831): #5      _runZoned (dart:async/zone.dart:1516:10)
E/Flutter ( 6831): #6      runZoned (dart:async/zone.dart:1500:12)
E/Flutter ( 6831): #7      _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:180:5)
E/Flutter ( 6831): #8      _startIsolate.<anonymous closure> (dart:isolate/runtime/libisolate_patch.dart:300:19)
E/Flutter ( 6831): #9      _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
E/Flutter ( 6831):

这是我更新的代码：

/////////////main.dart//////////

    void printHello() {
      final DateTime Now = new DateTime.Now();
      final int isolateId = Isolate.current.hashCode;
      print("[$Now] Hello,world! isolate=${isolateId} 
      function='$printHello'");
    }

    void main() async {
    runApp(MaterialApp(home: Application()));
    }

     class Application extends StatelessWidget {
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          body: Container(
            child: Center(
              child: RaisedButton(
                child: Text('Hello'),onpressed: () {
                  runAlarm();
                },),);
      }

  void runAlarm() {
    AndroidAlarmManager.oneshot(
      Duration(seconds: 10),printHello,wakeup: true,).then((val) => print(val));
  }
  static void alarmtest() {
    print("test");
  }

}

It does not give any Error in console but print two statements as below:

E/AlarmService(11943): Fatal: Failed to find callback
I/AlarmService(11943): AlarmService has not yet started.


I also initialize the alarm manager but it gives error in console:


 void runAlarm() {
    AndroidAlarmManager.periodic(
      Duration(seconds: 10),).then((val) => print(val)).catchError((e) {
      print(e);
    });
  }


Error:

E/Flutter ( 6831): [ERROR:Flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: PlatformException(error,null)
    E/Flutter ( 6831): #0      JSONMethodCodec.decodeEnvelope (package:Flutter/src/services/message_codecs.dart:149:7)
    E/Flutter ( 6831): #1      MethodChannel.invokeMethod (package:Flutter/src/services/platform_channel.dart:302:33)
    E/Flutter ( 6831): <asynchronous suspension>
    E/Flutter ( 6831): #2      AndroidAlarmManager.initialize (package:android_alarm_manager/android_alarm_manager.dart:76:10)
    E/Flutter ( 6831): <asynchronous suspension>
    E/Flutter ( 6831): #3      main (package:alarmdemo/main.dart:12:29)
    E/Flutter ( 6831): <asynchronous suspension>
    E/Flutter ( 6831): #4      _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:189:25)
    E/Flutter ( 6831): #5      _rootRun (dart:async/zone.dart:1124:13)
    E/Flutter ( 6831): #6      _CustomZone.run (dart:async/zone.dart:1021:19)
    E/Flutter ( 6831): #7      _runZoned (dart:async/zone.dart:1516:10)
    E/Flutter ( 6831): #8      runZoned (dart:async/zone.dart:1500:12)
    E/Flutter ( 6831): #9      _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:180:5)
    E/Flutter ( 6831): #10     _startIsolate.<anonymous closure> (dart:isolate/runtime/libisolate_patch.dart:300:19)
    E/Flutter ( 6831): #11     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
    E/Flutter ( 6831): 
    E/Flutter ( 6831): [ERROR:Flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: MissingPluginException(No implementation found for method AlarmService.initialized on channel plugins.Flutter.io/android_alarm_manager_background)
    E/Flutter ( 6831): #0      MethodChannel.invokeMethod (package:Flutter/src/services/platform_channel.dart:300:7)
    E/Flutter ( 6831): <asynchronous suspension>
    E/Flutter ( 6831): #1      _alarmManagerCallbackdispatcher (package:android_alarm_manager/android_alarm_manager.dart:49:12)
    E/Flutter ( 6831): #2      _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:189:25)
    E/Flutter ( 6831): #3      _rootRun (dart:async/zone.dart:1124:13)
    E/Flutter ( 6831): #4      _CustomZone.run (dart:async/zone.dart:1021:19)
    E/Flutter ( 6831): #5      _runZoned (dart:async/zone.dart:1516:10)
    E/Flutter ( 6831): #6      runZoned (dart:async/zone.dart:1500:12)
    E/Flutter ( 6831): #7      _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:180:5)
    E/Flutter ( 6831): #8      _startIsolate.<anonymous closure> (dart:isolate/runtime/libisolate_patch.dart:300:19)
    E/Flutter ( 6831): #9      _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
    E/Flutter ( 6831):

enter image description here

解决方法

您没有初始化警报对象和回调处理程序.

await AndroidAlarmManager.initialize();

当应用程序开始运行时会发生什么：

void main() async {
    runApp(MaterialApp(home: Application()));
 }

该应用程序只是为您运行并绘制UI.单击该按钮后,将调用以下方法：

AndroidAlarmManager.oneshot(
   Duration(seconds: 10),)

此函数只是在指定的延迟时间后调度回调.这将失败,因为Callback处理程序未注册.意思是,在超时后,它找不到“任何人”负责运行’printHello’.

编辑：

您还需要覆盖一个方法来帮助插件在创建时注册.

创建一个如下所示的新文件：

yourapprootfolder/android/app/src/main/java/io/Flutter/plugins/androidalarmmanagerexample/Application.java

在.java文件中,放入：

package io.Flutter.plugins.androidalarmmanagerexample;

import io.Flutter.app.FlutterApplication;
import io.Flutter.plugin.common.PluginRegistry;
import io.Flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.Flutter.plugins.GeneratedpluginRegistrant;
import io.Flutter.plugins.androidalarmmanager.AlarmService;

public class Application extends FlutterApplication implements PluginRegistrantCallback {
  @Override
  public void onCreate() {
    super.onCreate();
    AlarmService.setPluginRegistrant(this);
  }

  @Override
  public void registerWith(PluginRegistry registry) {
    GeneratedpluginRegistrant.registerWith(registry);
  }
}

或在Kt文件中：

package io.Flutter.plugins.androidalarmmanagerexample;

import io.Flutter.app.FlutterApplication;
import io.Flutter.plugin.common.PluginRegistry;
import io.Flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.Flutter.plugins.GeneratedpluginRegistrant;
import io.Flutter.plugins.androidalarmmanager.AlarmService;

class Application : FlutterApplication(),PluginRegistrantCallback {
      override fun onCreate() {
        super.onCreate();
        AlarmService.setPluginRegistrant(this);
      }

      override fun registerWith(registry: PluginRegistry) {
        GeneratedpluginRegistrant.registerWith(registry);
      }
}

Android Studio & Flutter logs

Android Studio Http代理(重启生效)

mirrors.neusoft.edu.cn:80

Flutter 镜像

PUB_HOSTED_URL=https://pub.Flutter-io.cn
FlutteR_STORAGE_BASE_URL=https://storage.Flutter-io.cn

Android Studio Flutter 调试技巧 Flutter Inspector 提升你的维护开发效率轻松定位复杂嵌套 Widget 代码位置

题记
—— 执剑天涯，从你的点滴积累开始，所及之处，必精益求精。

Flutter 是谷歌推出的最新的移动开发框架。

【x1】微信公众号的每日提醒随时随记每日积累随心而过

【x2】各种系列的视频教程免费开源关注你不会迷路

【x3】系列文章百万 Demo 随时复制粘贴使用

Flutter 是最新一代的跨平台开发框架，目前我们使用 Flutter 来架构了产业链中的几款 APP，随着业务的扩大，以及项目的快速迭代，在未进行模式设计时，Flutter 中堆叠了大量的代码，有时一个 Widget 页面的代码量就可能达 5000 多行，如果你是开发人员，新接手到这样的项目，多多少少会有点想吐，或者说这个页面也可能是你亲自开发出来的，但是经过一年两年这样的时间历程以及多次业务逻辑的改造，你再去维护这样的页面内容多少会有点闹心，当然小编也亲身经历过，那就是在初次使用 Flutter 开发项目时，边学边堆叠代码，到最后代码的风格各式各样的写法，当然也堆叠了大量的代码块，经过几个月后，再去维护，真是那个闹心。

所幸的是，在 Android Studio 中，对 Flutter 项目，有了很好的扩展工具支持，默认情况下，在 Android Studio 开发工具的右侧边栏上有一个 Flutter Inspector 工具，可以快速的定位 UI 代码，操作步骤【点击查看视频】，合理的应用这个工具，可以帮你节省 1 倍以上的开发时间。

在这里插入图片描述

当然需要注意的是每次切换选择时，都需要执行一下如下图所示的第二步的刷新同步一下页面的 Widget 。
当你不再使用时，执行一下第三步的操作，不选中即可。

本文同步分享在博客 “早起的年轻人”（CSDN）。
如有侵权，请联系 support@oschina.cn 删除。
本文参与 “OSC 源创计划”，欢迎正在阅读的你也加入，一起分享。

android studio flutter代理设置问题

前提

初次安装flutter,通过代理设置加快速度安装首次更新数据,但在添加设备并开始打包编译时出现classpath找不到的情况

1.在初次启动IDE的时候会提示更新各种SDK包,此时一般会直接设置代理,我的系统时Ubuntu18.04,所以直接代理了本地vpn,127.0.0.1 端口1080

2.在编译打包的时候出现了找不到相关的包,原因是flutter三个默认配置的地方采用了Google路径的包

切换maven包源为国内阿里源

在android/build.gradle下都换为

//        google()
//        jcenter()
maven { url ''https://maven.aliyun.com/repository/google'' }
maven { url ''https://maven.aliyun.com/repository/jcenter'' }
maven { url ''http://maven.aliyun.com/nexus/content/groups/public'' }

切换flutter sdk包源为国内阿里源

flutter安装路径

vim /home/elinx/web/tools/flutter/packages/flutter_tools/gradle/flutter.gradle

//        google()
//        jcenter()
maven { url ''https://maven.aliyun.com/repository/google'' }
maven { url ''https://maven.aliyun.com/repository/jcenter'' }
maven { url ''http://maven.aliyun.com/nexus/content/groups/public'' }

关闭IDE全局代理 : 设置->搜索proxy

关闭由于IDE自己生成的本地的全局代理(这里才是IDE内部最终代理使用配置)

我的本地路径: vim .gradle/gradle.properties

注释所有代理项和端口

systemProp.https.nonProxyHosts=192.168.*,*.test
#systemProp.https.proxyPort=1080
#systemProp.http.proxyHost=127.0.0.1
systemProp.http.nonProxyHosts=192.168.*,*.test
#systemProp.https.proxyHost=127.0.0.1
#systemProp.http.proxyPort=1080

关于正确配置Android Studio和Flutter、Dart插件版本 Start a new Flutter project和androidstudio安装flutter插件的介绍已经告一段落，感谢您的耐心阅读，如果想了解更多关于Android Alarm Manager不适用于Flutter Project App、Android Studio & Flutter logs、Android Studio Flutter 调试技巧 Flutter Inspector 提升你的维护开发效率轻松定位复杂嵌套 Widget 代码位置、android studio flutter代理设置问题的相关信息，请在本站寻找。

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