1:在android原生根目录下通过运行命令创建flutter module,这种创建与 flutter new project
内部目录结构不一样,所以直接用命令去创建,

2:new Binding 如果标识红色报错,那就看看flutter是否导入,或者目录结构是否正确,
evaluate方法.groovy的文件路径可以直接拼接具体路径('XXX/my_flutter/.android/include_flutter.groovy'

)

3:minSdkVersion 最低版本为16

4:JDK 为1.8

5:如果Executing tasks: [:app:assembleDebug]错误,命令行 ./gradlew assembleDebug

6:如果android 调用flutter 页面事通过创建Fragment替换来时先得,会有黑屏效果打包为release就解决了
,默认调用main.dart时AppBar 是没有返回键的,所以需要自己手动添加IconButton,但appBar返回也黑屏,是因为
当前是栈内最后一个页面,或者主界面,所以通过Navigator.pop(context)退出为栈内退出,SystemNavigator.pop();这种是主界面退出,所以当android
嵌入调用flutter第一个界面main.dart时返回就需要用SystemNavigator.pop();

 

创建Flutter module

在当前project下 运行命令 

flutter create -t module my_flutter(my_flutter为生成的flutter module名称)

增加配置代码

(1) 在工程的settings.gradle增加以下配置 

(2)在app (假如你的Android应用名称为app)的build.gradle文件下dependencies增加如下依赖

其中flutter工程为创建Flutter module过程自动生成的,注意就是flutter,b

注意 其中 minSdkVersion 需要至少为16,否则会报错

生成的工程结构如下:

工程目录结构

在Android工程中创建Flutter的UI(调用Flutter中的dart编写的widget)

 Flutter提供两种方法引入,一种是View,一种是Fragment,View如下

其中,第二个参数是Lifecycle对象, 第三个参数为route,这个参数Flutter端可以通过window.defaultRouteName
获取,利用它flutter可知道要创建哪个widget.

同理 Flutter.createFragment(String route)可生成FlutterFragment

顺便说明下在运行后会发现有白屏的情况,是因为在debug模式下运行的原因,无需理会,最终发布release模式下会很快的

Flutter module支持hot reload (热重载)

进入到flutter module目录下

执行命令 flutter attach 即可

如上就说明连接成功,只要有改动,键盘敲击R或者r 即可看到更改

如果你运行命令后一直在waiting,可尝试杀死该应用进程后再重启,进入相关Flutter页面就可连接上了

 

flutter main.dart 文件代码 导入ui 调用 window.defaultRouteName获得传入的值,可以通过传值判断跳转那个页面

 
android类: FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_browse_fragment,
Flutter.createFragment("route1")); fragmentTransaction.commit(); import
'dart:ui'; import 'package:flutter/material.dart'; void main() =>
runApp(widgetForRoute(window.defaultRouteName)); Widget widgetForRoute(String
route) { switch (route) { case 'route1': return new MyApp(); case 'route2':
return new MyApp(); default: return Center( child: Text('Unknown route1 :
$route', textDirection: TextDirection.ltr), ); } } class MyApp extends
StatelessWidget { // This widget is the root of your application. @override
Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo',
theme: ThemeData( // This is the theme of your application. // // Try running
your application with "flutter run". You'll see the // application has a blue
toolbar. Then, without quitting the app, try // changing the primarySwatch
below to Colors.green and then invoke // "hot reload" (press "r" in the console
where you ran "flutter run", // or press Run > Flutter Hot Reload in a Flutter
IDE). Notice that the // counter didn't reset back to zero; the application is
not restarted. primarySwatch: Colors.blue, ), home: MyHomePage(title: 'Flutter
Demo Home Page'), ); } } class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key); // This widget is the home
page of your application. It is stateful, meaning // that it has a State object
(defined below) that contains fields that affect // how it looks. // This class
is the configuration for the state. It holds the values (in this // case the
title) provided by the parent (in this case the App widget) and // used by the
build method of the State. Fields in a Widget subclass are // always marked
"final". final String title; @override _MyHomePageState createState() =>
_MyHomePageState(); } class _MyHomePageState extends State<MyHomePage> { int
_counter = 0; void _incrementCounter() { setState(() { // This call to setState
tells the Flutter framework that something has // changed in this State, which
causes it to rerun the build method below // so that the display can reflect
the updated values. If we changed // _counter without calling setState(), then
the build method would not be // called again, and so nothing would appear to
happen. _counter++; }); } @override Widget build(BuildContext context) { //
This method is rerun every time setState is called, for instance as done // by
the _incrementCounter method above. // // The Flutter framework has been
optimized to make rerunning build methods // fast, so that you can just rebuild
anything that needs updating rather // than having to individually change
instances of widgets. return Scaffold( appBar: AppBar( // Here we take the
value from the MyHomePage object that was created by // the App.build method,
and use it to set our appbar title. title: Text(widget.title), ), body: Center(
// Center is a layout widget. It takes a single child and positions it // in
the middle of the parent. child: Column( // Column is also layout widget. It
takes a list of children and // arranges them vertically. By default, it sizes
itself to fit its // children horizontally, and tries to be as tall as its
parent. // // Invoke "debug painting" (press "p" in the console, choose the //
"Toggle Debug Paint" action from the Flutter Inspector in Android // Studio, or
the "Toggle Debug Paint" command in Visual Studio Code) // to see the wireframe
for each widget. // // Column has various properties to control how it sizes
itself and // how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical // axis
because Columns are vertical (the cross axis would be // horizontal).
mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ Text( 'You
have pushed the button this many times:', ), Text( '$_counter', style:
Theme.of(context).textTheme.display1, ), ], ), ), floatingActionButton:
FloatingActionButton( onPressed: _incrementCounter, tooltip: 'Increment',
child: Icon(Icons.add), ), // This trailing comma makes auto-formatting nicer
for build methods. ); } }

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