Solution:

Step 1: I fixed the problem by opening Android Studio.

Step 2: Click to More Actions.

Step 3: Then click on ‘SDK Manager’.

Step 4: In the ‘Preferences’ window, Switching to the SDK Tools tab, Select the ‘Android SDK Command-line Tools (latest)’ checkbox and Click on Apply.

Step 5: Next, Click ok, ok

Step 6: After completing this process , Again run flutter doctor in your terminal.

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What is Flutter?

Flutter is an open-source UI software development kit created by Google. It’s used to develop cross-platform applications for Android, iOS, Linux, Mac, Windows, Google Fuchsia, and the web from a single codebase. Here’s why Flutter is significant and how it compares with other frameworks:

Why Flutter?

1. Cross-platform Development: Flutter allows developers to write a single codebase that runs on multiple platforms. This reduces development time and effort as compared to native app development where different codebases are needed for each platform.
2. Hot Reload: Flutter’s hot reload feature enables developers to see the changes in code on emulators, simulators, and hardware instantly. The immediate feedback loop accelerates the development process by allowing quick tweaks and bug fixes.
3. Rich Widget, Animation, and Customizable UIs: Flutter comes with a rich set of fully-customizable widgets that helps in building complex and animated user interfaces. Widgets are the building blocks of a Flutter app’s UI, each representing a declarative aspect of the UI.
4. Performance: Flutter applications are compiled directly into native code, which improves the performance. It doesn’t rely on any intermediate code representations or interpretation, which means that Flutter apps run nearly as fast as native apps.

How It Compares to Other Frameworks

1. React Native: Like Flutter, React Native is also popular for cross-platform development. While React Native translates the source code to native elements at runtime, Flutter compiles to native code ahead-of-time. Flutter tends to have better performance benchmarks due to this difference.
2. Xamarin: Xamarin forms UI components into native platform equivalents, which can lead to slightly less consistent performance compared to Flutter. Flutter maintains consistent behavior across platforms because it has its own widgets and rendering engine.
3. Ionic: Ionic uses web technologies to build apps, which generally perform slower than the native apps. Flutter, being closer to the metal and using a compiled development approach, generally offers superior performance.

Benefits of Flutter

1. Faster Time to Market: Flutter significantly reduces the time needed to develop apps across multiple platforms. The single codebase and the wide range of fully-customizable widgets expedite the development process.
2. Reduced Cost of Development: Since Flutter enables cross-platform development, it reduces the resources and the team size needed as compared to native development for each platform.
3. Near-Native Performance: As Flutter apps are compiled into native code, they perform almost as well as native apps on major performance metrics like scrolling, network latency, and graphics animations.
4. Large and Growing Community: Being backed by Google, Flutter has a robust community support and ecosystem. This includes a wide range of third-party packages and plugins which can be integrated into Flutter apps to extend their capabilities.

These features make Flutter a compelling choice for developers looking to build high-quality, natively compiled applications for mobile, web, and desktop from a single codebase.

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Creating your first Flutter project is an exciting journey into mobile app development. Here’s a step-by-step guide to help you get started:

1. Install Flutter

Before you create a project, you need to install Flutter on your machine.

• Download Flutter: Go to the Flutter installation page and download the latest stable release of Flutter SDK for your operating system.
• Extract the file: Extract the downloaded zip file to a desired location on your file system.
• Update your path: Add the Flutter tool to your path. This process varies by operating system.
• Verify installation: Open a terminal window and run flutter doctor. This command checks your environment and displays a report to the terminal window. The command output should indicate that there are no issues (a checkmark) for each section.

2. Set Up an Editor

You can use any editor you like for Flutter development, but Android Studio or Visual Studio Code are highly recommended because they provide Flutter app execution and debugging support.

• Install an editor: Download and install Android Studio or Visual Studio Code.
• Install the Flutter and Dart plugins: For Android Studio, install the Flutter plugin from the plugin marketplace. For VS Code, install the Flutter and Dart extensions from the VS Code Extensions Marketplace.

3. Choose a directory:

Decide where you want to create your Flutter project. It can be anywhere on your system, but it’s best to choose a location where you keep your development projects organized.

4. Navigate to the chosen directory:

Open your terminal or command prompt and use the ‘cd’ command to navigate to the directory where you want to create your Flutter project. For example:

cd path/to/your/desired/directory

5. Create a New Flutter Project:

Open your terminal or command prompt and run the following command to create a new Flutter project:

flutter create my_first_app

6. Navigate to the project directory:

After creating the project, navigate into the project directory using the ‘cd’ command:

cd my_first_app

7. Run the project:

Once you’re inside your project directory, run the following command to launch your Flutter app:

flutter run

By following these steps, you’ll create your Flutter project outside of the Flutter SDK directory and be able to run it without any issues.

The post Creating Your First Flutter Project: A Step-by-Step Guide appeared first on Artificial Intelligence.

What is flutter?

Flutter is an open-source UI software development kit created by Google. It is used to build natively compiled applications for mobile, web, and desktop from a single codebase. With Flutter, developers can create beautiful and high-performance apps that run on multiple platforms.

Top Use Cases of Flutter

• Cross-platform development: Flutter allows developers to write a single codebase that can be deployed to both Android and iOS devices. This can save a significant amount of time and effort, as developers do not need to maintain separate codebases for each platform.
• Fast development: Flutter’s hot reload feature enables developers to see the changes made in the code immediately on the app, speeding up the development process.
• Beautiful UI: Flutter provides a rich set of customizable widgets that help in creating visually appealing and engaging user interfaces.
• High performance: Flutter apps are compiled to native code, which means that they offer excellent performance on both Android and iOS devices.

Features of Flutter

• Cross-platform development: Flutter allows developers to write code once and run it on multiple platforms, including Android, iOS, macOS, Windows, Linux, and the web. This can save developers a lot of time and effort, as they do not need to write and maintain separate codebases for each platform.
• Hot reload: Hot reload is a feature of Flutter that allows developers to see changes to their code reflected in the running app without having to restart it. This can make development much faster and more efficient.
• Expressive UI: Flutter’s widget-based UI system allows developers to create expressive and interactive UIs. Flutter also provides a rich set of widgets that can be used to build a wide variety of app designs.
• Fast performance: Flutter apps are compiled to native machine code, which provides them with fast performance on all platforms.
• Open source: Flutter is an open source project, which means that it is free to use and distribute. It also has a large and active community of developers who contribute to the project and create new resources and tools.

Workflow of Flutter

1. Write code using Dart programming language: Flutter uses the Dart programming language, which is used to write the code for the app’s functionality and UI.
2. Build the UI using widgets: Flutter’s UI is built using widgets, which are reusable UI elements. Widgets can be combined and customized to create the desired UI.
3. Use hot reload for instant feedback: Flutter’s hot reload feature allows developers to make changes to the code and see the results instantly on the app, speeding up the development process.
4. Test the app: Flutter provides tools for testing the app’s functionality and UI, ensuring a high-quality user experience.
5. Deploy the app: Once the app is developed and tested, it can be deployed on multiple platforms, including iOS, Android, web, and desktop.

How Flutter Works & Architecture

Flutter is a cross-platform UI development framework created by Google. It uses a single codebase to create native-looking apps for Android, iOS, Web, macOS, Windows, Linux, and Fuchsia.

How Flutter Works

Flutter works by using a layered architecture, which separates the app’s code into different layers, each with its own responsibility. This makes the code more modular and easier to maintain.

The main layers of the Flutter architecture are:

• Framework: The framework provides the basic building blocks for Flutter apps, such as widgets, layout, and rendering.
• Engine: The engine is responsible for communicating with the underlying platform and rendering the UI.
• Dart: Dart is the programming language used to develop Flutter apps. It is a high-level, object-oriented language that is similar to Java and JavaScript.

Architecture

Flutter apps are typically structured using a Model-View-Controller (MVC) architecture. This architecture separates the app’s data (model), user interface (view), and business logic (controller).

The model represents the data that the app is working with. This data could come from a database, a network request, or even just a simple variable.

The view is the user interface of the app. It is responsible for displaying the data from the model and responding to user input.

The controller is responsible for managing the interaction between the model and the view. It handles user input, updates the model, and updates the view based on changes to the model.

Flutter has a number of benefits, including: Cross-platform development, Fast performance, Beautiful UI and Easy to learn etc.

How to Install and Configure Flutter

To install and configure Flutter, you will need to:

1. Make sure you have the following system requirements:
   • Windows 7 or higher
   • macOS 10.13 or higher
   • Linux (64-bit)
   • Dart 2.13 or higher
   • Android Studio or Visual Studio Code
2. Download and install the Flutter SDK.
   • From the Flutter website, click the Get the Flutter SDK button and download the Flutter SDK for your operating system.
   • Extract the downloaded ZIP file to a desired location on your computer.
   • Update your PATH environment variable to include the Flutter SDK bin directory.
3. Install Android Studio (optional).
   • Android Studio is an integrated development environment (IDE) that provides a complete set of tools for developing Android apps. It is not required for Flutter development, but it is recommended.
   • To install Android Studio, download the Android Studio installer from the Android Studio website and follow the installation instructions.
4. Set up your editor.
   • Flutter supports a variety of editors, including Visual Studio Code, Android Studio, and IntelliJ IDEA.
   • To set up your editor for Flutter development, install the Flutter plugin for your editor.
5. Run flutter doctor to verify your installation.
   • This command will check that you have all of the necessary tools installed and configured correctly.
   • If you encounter any errors, follow the instructions provided by the command to resolve them.

Once you have completed these steps, you are ready to start developing Flutter apps.

To configure Flutter, you can use the flutter config command. This command allows you to set various configuration options, such as the default device and emulator, the Android Studio directory, and the Dart SDK directory.

For example, to set the default device to a specific Android device, you would use the following command:

flutter config --android-device-id=<device-id>

To set the Android Studio directory, you would use the following command:

flutter config --android-studio-dir=<android-studio-dir>

Step-by-step tutorials for Flutter for a Hello World program:

Step-by-step tutorials for Flutter for a Hello World program:

1. Install Flutter and Dart.

If you don’t have Flutter and Dart installed, you can follow the instructions on the Flutter website: https://flutter.dev/get-started/install.

2. Create a new Flutter project.

Open a terminal window and navigate to the directory where you want to create your project. Then, run the following command:

flutter create hello_world

This will create a new Flutter project called hello_world.

3. Open the project in your IDE.

Once the project has been created, you can open it in your IDE. Popular IDEs for Flutter development include Android Studio, IntelliJ IDEA, and Visual Studio Code.

4. Edit the main.dart file.

The main.dart file is the entry point for your Flutter app. It contains the code that creates and runs the app’s user interface.

To create a Hello World program, add the following code to the main.dart file:

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Hello World!'),
        ),
        body: Center(
          child: Text('Hello World!'),
        ),
      ),
    );
  }
}

This code will create a simple app with a title bar and a text widget in the center of the screen.

5. Run the app.

To run the app, click the run button in your IDE. The app will be launched on a simulator or emulator.

If you are running the app on a physical device, you will need to connect the device to your computer and select it as the run target in your IDE.

6. Congratulations! You have created your first Flutter app.

You can now explore the Flutter documentation and tutorials to learn more about how to develop Flutter apps.

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What went wrong: Execution failed for task ‘:app:processDebugGoogleServices’.

No matching client found for package name ‘com.example.myapp ‘

Step -1: check your google-services.json and build.gradle matching applicationId and package_name match

this is google-services.json file

this is build.gradle file

So no matching applicationId and package name get the match so remove com.

The post Execution failed for task’:app:processDebugGoogleServices’.> No matching client found for package name’com.cotocus.holidaylandmark.publisher.holidaylandmark_publisher’ android studio-SOLVED appeared first on Artificial Intelligence.

A confirm dialog is a dialog box that asks users to approve the requested operation. It usually appears with button pairs like Yes/No, OK/Cancel, Agree/Disagree. Confirm dialogs help prevent accidental actions such as deleting content, closing an account, leaving a page when the form content on that page has not been saved, etc.

This article shows you how to creat confirm dialogs in Flutter. We will go over 2 examples: the first one demonstrates a material confirm dialog and the second one displays a Cupertino (iOS-style) confirm dialog.

Material Confirm Dialog

If you are developing an app for both Android and iOS and doesn’t need an iOS-exclusive experience, using material is a good way to go.

Preview

Our sample app has a button and a red box. When the button is pressed, a confirm dialog will show up.

• f the user select “Yes”, the box will be removed then the dialog will be closed. The button then becomes disable.
• If the user select “No”, the dialog will be closed and nothing else happens.

The code

The complete code with explanations:

Cupertino Confirm Dialog

Preview

The code

Don’t forget to import the Cupertino library:

The full code for the xample:

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Flutter Widgets

Hello World Example

Types of Widget

We can split the Flutter widget into two categories:

• Visible (Output and Input)
• Invisible (Layout and Control)

Visible widget

The visible widgets are related to the user input and output data. Some of the important types of this widget are:

Text

A Text widget holds some text to display on the screen. We can align the text widget by using textAlign property, and style property allow the customization of Text that includes font, font weight, font style, letter spacing, color, and many more. We can use it as like below code snippets.

Button

This widget allows you to perform some action on click. Flutter does not allow you to use the Button widget directly; instead, it uses a type of buttons like a FlatButton and a RaisedButton. We can use it as like below code snippets.

In the above example, the onPressed property allows us to perform an action when you click the button, and elevation property is used to change how much it stands out.

The post Flutter Basic Query appeared first on Artificial Intelligence.

Refrence:https://stackoverflow.com/questions/50839282/how-to-add-multiple-floating-button-in-stack-widget-in-flutter

The post How to create multiple floating action button in Flutter appeared first on Artificial Intelligence.

Step 2: click open for editing in android studio shown in below figure

Step 3:now your project starts to build you can check it by clicking in build in bottom taskbar

Step 4:after build finish click or expand gradle script–click build gradle and change flutter version code from 1 to 2 if its 2 then change to 3 just increment it by one and also change flutterversion name from 1.0 to 1.1 or 1.2 that shown in below figure

click sync now==>

Step 5: click build in top menu bar then click generate signed bundle key after clicking it click next don ‘t select anything like apk radio button simply click next

Step 6: click chooses existing–select holidaylandmark credential keystore-> expand–> select keystore.jsk

then browse encrypted key export path and browse and select project name holidaylandmark

Step 8: then click next–>select release—>click finish

next click generate signed bundle then click locate

after click locate you will reach the realease apk file where it is located

Step 9:then

drag app-release.aab and click production–>click edit release–>

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first select method get

next step, paste your api url that shown in below figure

then click send button your output shown below figure

check post method( when you store data)========================

first select post method

next put your url

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