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How can I dd in-app-purchase functionality to my flutter app?

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问题 I am going to add in-app-purchase functionality to my flutter app, but could not find any relevant information or sample app about in-app-purchases, can anyone share any links or example apps that contain in-app-purchase functionality? Thank you 回答1: Have a look at this package https://pub.dev/packages/in_app_purchase dependencies: in_app_purchase: ^0.3.4+8 Example code: import 'dart:async'; import 'dart:io'; import 'package:flutter/material.dart'; import 'package:in_app_purchase/in_app

Handle the list of dynamic checkboxes when the widget is added on button click in flutter

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问题 When clicking the add button, the same widget is replicated. The widget contains the list of checkboxes that are multi selectable. I am able to replicate the widget but I got problem to handle the checkboxes according to the index of the widget. In image below the checkbox checked state is replicated along with the new add widget. I have implemented as follows: Build the widget according to the addbutton click ListView.builder( itemCount: counting, shrinkWrap: true, physics: const

Flutter常用命令和mac电脑常用命令

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0. flutter create example_demo 新建flutter项目 1、 flutter packages get 安装新增的包 2、 flutter run 运行flutter项目：　　r 刷新xian jian x页面 R刷新重构程序 h帮助 d和q退出 o 是ios和andriod的切换 3、 flutter doctor 检测必要依赖是否安装成功 4.flutter运行.当有多个模拟器的时候，指定只运行于一个模拟器的方法： More than one device connected; please specify a device with the ' -d <deviceId> ' flag, oruse ' -d all ' to act on all devices. “xx”的 iPhone • ebde052af5111ac5ff3b41dasdasdasdadd6cbfedc • ios • iOS 12.0 . 1 iPhone Xs Max • 6F2F0D31 -9EDF-43EF-AC8D-558FC52D9EC4 • ios • iOS 12.1 (simulator) flutter run -d all 在所有模拟器上运行项目 flutter run -d 6F2F0D31-9EDF-43EF-AC8D

Flutter之Container详解

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1 基本内容 1.1 继续关系 Object > Diagnosticable > DiagnosticableTree > Widget > StatelessWidget > Container 注：所有控件都是Widget的子类！ 1.2 介绍一个便利的控件，结合了常见的绘画，定位和大小调整。 1.3 行为由于Container结合了许多其他Widget，每个Widget都有自己的布局行为，因此Container的布局行为有点复杂。依次是： 1.采用alignment 2.以child调整自身大小 3. 采用了width，height和constraints 4.扩大以适应父Widget 5.要尽可能小具体情况来说： 1· 如果Container没有子Widget，没有height，没有width，没有constraints，并且父窗口提供无限制约束，则Container尝试尽可能小。 2· 如果Container没有子Widget，没有alignment，而是一个height，width或 constraints提供，Container试图给出这些限制和父Widget的约束相结合，以尽可能小。 3· 如果Container没有子Widget，没有height，没有width，没有constraints，没有alignment，但是父窗口提供了有界约束

Flutter Scaffold组件详情配制使用

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重要消息精通点的可以查看这里精述 Flutter 从入门实践到开发一个APP之UI基础篇视频 flutter从入门到精通系列文章 Flutter Scaffold 组件系列 Scaffold组件的基本使用 Scaffold组件中floatingButton悬浮按钮 Scaffold组件中drawer侧拉页面详述 Scaffold组件中bottomNavigationBar底部导航栏配制本文章将详细综述Scaffold组件的属性配制本页面中最终实现的页面效果 1 Scaffold简述 Scaffold 实现了基本的 Material Design 布局结构，Scaffold在英文中的解释为角手架，我们可以理解为楼体中的钢架结构，通过它可以构建一个页面。在Flutter应用开发中，我们可以将 Scaffold 理解为一个布局的容器。可以在这个容器中绘制我们的用户界面。 2 Scaffold 组件的基本使用 2.1 Flutter应用程序的入口函数 import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; import 'package:mdemo1/scaffold/scffold_home_page.dart'; ///flutter应用程序中的入口函数 void

【Flutter学习】之MaterialApp和Scaffold组件使用详解

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一，前言：　　MaterialApp和Scaffold是Flutter提供的两个Widget，其中： MaterialApp是一个方便的Widget，它封装了应用程序实现Material Design所需要的一些Widget。 Scaffold组件是Material Design布局结构的基本实现。此类提供了用于显示drawer、snackbar和底部sheet的API。MaterialApp 的 child 是 Scaffold Widget。二，MaterialApp属性介绍　　　　　　　　　　　　　　　　　　　　　　 * 22个参数字段类型 navigatorKey（导航键） GlobalKey<NavigatorState> home（主页） Widget routes（路由） Map<String, WidgetBuilder> initialRoute（初始路由） String onGenerateRoute（生成路由） RouteFactory onUnknownRoute（未知路由） RouteFactory navigatorObservers（导航观察器） List<NavigatorObserver> builder（建造者） TransitionBuilder title（标题） String onGenerateTitle（生成标题）

displayName return null when logged using email and password

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问题 I have two options for user login, using email and password using google sign in When I log using google sign in method its display name, but it not display name when using email and password, user.displayName is return null when using 1st option. I have use provider for authenticating, I have tried currentUser method also. I store users in firestore. This is what I am getting.This is my users collection 回答1: If a user signed up using email and password, there is an option to update

formatexception (formatexception: unexpected character (at character 1) json

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问题 The error as stated is: formatexception (formatexception: unexpected character (at character 1) json Is there a solution to this? 回答1: Try this one bro final response = await http.post("url", body{ 'username': username, 'password': password, }, header{ 'accept':'*/*' }); 回答2: As you can see in the Exception, you are getting HTML code instead of JSON in the response.body: <!DOCTYPE html PUBLIC "~//W3C/DTD XHTML 1.0 Strict//EN" "http://www.w3.org... The solution would be to receive a JSON or to

displayName return null when logged using email and password

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formatexception (formatexception: unexpected character (at character 1) json

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