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How to Change the Text Color in Flutter | Change Color of Text in 2023

January 26, 2023

In this article, we will explore how to change the text color in flutter / Flutter Change Color of Text in an application. We know that Text widget is a basic text display component that allows developers to display a short piece of text on the screen. It can be used to display a single line of text or multiple lines of text, and it can be styled using a variety of properties such as color, font size, font weight, and more.

The output will look like this:

Flutter Change Color of Text Locally

The process of Flutter Change Color of Text is relatively simple and can be achieved through the use of the TextStyle class and its color property.

Steps:

Find out the file where you need to place the text widget.
Inside the Text Widget, add a style parameter and assign this to the TextStyle widget.
Add the color parameter inside the TextStyle widget.
Now set the color what you want. For example, color: Colors.red

This is how you can change the text color only locally or at the page level.

Example Code of Flutter Change Color of Text

Text(
  "Hello World!",
  style: TextStyle(color: Colors.red),
),

Please note that the above example change the text color to red. You can choose any color that you want.

You can also use Hex color code, RGB color code and more to set the text color.

Text(
  "Hello World!",
  style: TextStyle(color: Color(0xff0000ff)),
),

The above example sets the text color to blue using the hex color code.

Changing text color globally using ThemeData

Sometimes we might be looking to have a common style for the whole pages of your app. There are several advantages to changing the text color globally in a Flutter app:

Consistency: Changing the text color globally ensures that all text in the app has the same color, which can create a more cohesive and visually pleasing user interface.
Easier maintenance: When the text color is set globally, it is easier to make changes to the text color throughout the app. If the text color is set for each individual text widget, it can be time-consuming and error-prone to make changes.
Better accessibility: Setting the text color globally can make it easier to ensure that text is legible for users with visual impairments.
Reusability: When the text color is set globally, it can be easily reused in other parts of the app, which can be useful when creating a new page or component.
Flexibility: Changing the text color globally can be useful when creating different themes for your app, as it allows you to quickly and easily change the text color for the entire app.
Performance: Changing the text color globally is faster than updating the color for each individual text widget, as it requires fewer rebuilds and less computation.

By using the global text color, it will be easy to change the text color throughout the app and ensure consistency in the design and accessibility as well as it will be easy to maintain the code.

Steps

First, locate the MaterialApp Widget.
Now add the theme parameter with ThemeData class assigned inside the MaterialApp.
Add the textTheme parameter and assign the TextTheme with appropriate TextStyle like headline1, headline2
Mention the color inside the TextStyle widget.

return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        textTheme: TextTheme(
          headline2: TextStyle(color: Colors.red),
          bodyText1: TextStyle(color: Colors.blue),
        ),
      ),
      home: const MyHomePage(title: 'Flutter Service'),
    );

Now we have to assign the code on style

body: Column(
        children: [
          Text('This is a headline',
              style: Theme.of(context).textTheme.headline2),
          Text('This is body text',
              style: Theme.of(context).textTheme.bodyText1),
        ],
      ),

Full Code

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        textTheme: TextTheme(
          headline2: TextStyle(color: Colors.red),
          bodyText1: TextStyle(color: Colors.blue),
        ),
      ),
      home: const MyHomePage(title: 'Flutter Service'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Flutter Service")),
      body: Column(
        children: [
          Text('This is a headline',
              style: Theme.of(context).textTheme.headline2),
          Text('This is body text',
              style: Theme.of(context).textTheme.bodyText1),
        ],
      ),
    );
  }
}

Output

Different Ways To add the Colors in Flutter

Three ways you can add color to the Text Widget and Flutter Change Color of Text.

Colors.blue: This only used to define from predefined colors.
Color(0xff0000ff): This is only use as custom color.
Color.fromARGB(200, 66, 150, 145): This is only use to get color from alpha, red, green and blue color combination.

Code Example

Text(
              'Welcome to Flutter Service?',
              style: TextStyle(fontSize: 30, color: Colors.deepPurpleAccent),
            ),
            Text(
              'Do you need any Service?',
              style: TextStyle(fontSize: 30, color: Color(0xff0000ff)),
            ),
            Text(
              'We are Expert',
              style: TextStyle(
                  fontSize: 30, color: Color.fromARGB(200, 66, 150, 145)),
            ),

Output

Conclusion

In summary, this Flutter Change Color of Text article explained how to change text color in a Flutter app. Changing the text color can be done by setting the style property of the Text widget directly or by using the textTheme property in the ThemeData object. Changing text color globally has several benefits, such as consistency in design, easy maintenance, better accessibility, and flexibility. It is a good practice for making the app design consistent and easy to maintain. This article provided a clear understanding of how to change text color in Flutter and how it can be implemented in an app.

References: Flutter documentation

How to Use Path Provide Flutter with Read Write Example in 2023

Md Nazmul Islam

January 18, 2023

Path Provider Flutter is a Flutter package for finding commonly used locations on the filesystem. Path Provide Flutter is an important package in Flutter for working with files and directories on the file system. Path Provide Flutter allows developers to easily access commonly used locations such as the temporary directory and the application documents directory, which are the locations where files are typically stored. These locations can be used to read or write files in Flutter, which is important for many applications that need to save and retrieve data.

For example, an application that allows users to take photos and save them to their device will need to use the Path Provider flutter to determine the location to save the photos. Similarly, an application that allows users to create and save documents will need to use the Path Provider flutter to determine the location to save the documents.

Additionally, the Path Provide Flutter also allows developers to easily access the external storage directory on the device, which is useful for applications that need to save large files or backup data.

Flutter Path Provider Method

You will get following method to access the device storage by using Path Provide Flutter.

getApplicationDocumentsDirectory(): getApplicationDocumentsDirectory() is a method in Flutter that returns a directory where the app can store files that are meant to be persisted across app launches. These files will be deleted when the app is uninstalled.
getTemporaryDirectory(): getTemporaryDirectory() is a method in Flutter that returns a directory where the app can store temporary files. These files may be deleted by the system at any time, so they should not be used for storing important data. This is typically used for caching files that can be regenerated if deleted.
getExternalStorageDirectory(): getExternalStorageDirectory() is a method in Flutter that returns the primary external storage directory of the device. This directory is typically used to store files that are meant to be shared with other apps or persist across app launches. The returned path may not be accessible if external storage is not available, or the app does not have the necessary permissions to access it.
getDownloadsDirectory(): getDownloadsDirectory() is a method in Flutter that returns the device’s download directory, where the user can typically find files that they have downloaded through the internet or other apps. This directory is often used by apps that need to download and store files such as images, videos, documents and more. It’s important to note that the returned path may not be accessible if the app does not have the necessary permissions to access it.
getExternalCacheDirectories(): getExternalCacheDirectories() is a method in Flutter that returns a list of directories where an app can store cache files on external storage devices, such as an SD card. This method is useful for apps that need to store temporary data that can be regenerated if deleted. The method returns a list of directories, in case the device has multiple external storage options. It’s important to note that the returned paths may not be accessible if the external storage is not available, or the app does not have the necessary permissions to access it, and that the files in the cache may be deleted by the system at any time.
getLibraryDirectory(): getLibraryDirectory() is a method in the Android operating system that returns the path to the directory on the device where the application can place persistent files it owns. This directory is internal to the application and is not accessible to other applications (nor to the user). It is best suited for files that the user doesn’t need to directly interact with.
getApplicationSupportDirectory(): getApplicationSupportDirectory() is a method in the iOS operating system that returns the path to the directory where an application can place files it needs to support its operation. This directory is internal to the application and is not visible to the user. It is best suited for files such as databases, user-generated content, and other application-specific files that the user doesn’t need to directly interact with. It is similar to Android’s getLibraryDirectory()

Path Provide Flutter

To use Path Provider in a Flutter project, you’ll first need to add it as a dependency in your pubspec.yaml file:

dependencies:
  path_provider: ^2.0.11

Example1: Get Temporary and Documents App Directory Path

You can then import the Path Provide Flutter package and use Path Provide Flutter in your code:

Now import the Path Provide Flutter package on your main.dart

import 'package:path_provider/path_provider.dart';
import 'dart:io';

Temporary Directory Path Code:

Directory tempDir = await getTemporaryDirectory();
temp_Path = tempDir.path;
print("temp_path: $temp_Path");
//output: /data/user/0/com.example.flutterserviceexample/cache

App Document Directory Path Code:

Directory appDir = await getApplicationDocumentsDirectory();
appPath = appDir.path;
print("app_path: $appPath");
//output: /data/user/0/com.example.flutterserviceexample/app_flutter

You can use these paths to read and write files in the flutter app.

Full Code:

import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:io';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.lightBlue,
      ),
      home: const MyHomePage(title: 'Flutter Service'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String temp_Path = "";
  String appPath = "";

  getPathLocation() async {
    Directory tempDir = await getTemporaryDirectory();
    temp_Path = tempDir.path;
    print("temp_path: $temp_Path");
    Directory appDir = await getApplicationDocumentsDirectory();
    appPath = appDir.path;
    print("app_path: $appPath");
  }

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

  @override
  void setState(VoidCallback fn) {
    // TODO: implement setState
    getPathLocation();
    super.setState(fn);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Container(
            padding: EdgeInsets.all(10),
            alignment: Alignment.center,
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Text("Temp Path: $temp_Path"),
                Text("App Path: $appPath")
              ],
            )));
  }
}

Output

Example 2: Read & Write a Text File

At first add the Path Provide Flutter dependency on pubspec.yaml

dependencies:
  path_provider: ^2.0.11

Now initialize the text editing controller and receive a text filed.

final textController = TextEditingController();
  String text = "";

Now let’s create create 2 method named createFile and readFile.

 Future<void> createFile(String text) async {
    final directory = await getApplicationDocumentsDirectory();
//creates text_file in the provided path.
    final file = File('${directory.path}/text_file.txt');
    await file.writeAsString(text);
  }

  Future<void> readFile() async {
    try {
      final directory = await getApplicationDocumentsDirectory();
      final file = File('${directory.path}/text_file.txt');
      text = await file.readAsString();
    } catch (e) {
      print('exception');
    }
  }

We will create a text file named text_file.txt

Now when the task destroyed we want to remove the textcontroller dispose.

@override
  void dispose() {
    textController.dispose();
    super.dispose();
  }

Now add the button and textfield on build widget.

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Flutter Service")),
      body: Column(
        children: [
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 18.0, vertical: 10),
            child: TextField(
              textAlign: TextAlign.center, //input aligns to center
              controller: textController, //assigns TextEditingController
            ),
          ),
          const SizedBox(
            height: 8,
          ),
          ElevatedButton(
            child: Text('Create File'),
            onPressed: () => createFile(
                textController.text), //calls createFile() when //button pressed
          ),
          ElevatedButton(
            onPressed: () async {
              await readFile(); //calls readFile()
              setState(() {}); //rebuilds the UI.
            },
            child: Text('Read File'),
          ),
         const SizedBox(
            height: 18,
          ),
          if (text != null) Text('$text') //text set if it's not null.
        ],
      ),
    );
  }

Full Code is

import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:io';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.lightBlue,
      ),
      home: const MyHomePage(title: 'Flutter Service'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final textController = TextEditingController();
  String text = "";

  Future<void> createFile(String text) async {
//provides directory path.
    final directory = await getApplicationDocumentsDirectory();
//creates text_file in the provided path.
    final file = File('${directory.path}/text_file.txt');
    await file.writeAsString(text);
  }

  Future<void> readFile() async {
    try {
      final directory = await getApplicationDocumentsDirectory();
      final file = File('${directory.path}/text_file.txt');
      text = await file.readAsString();
    } catch (e) {
      print('exception');
    }
  }

  @override
  void dispose() {
    textController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Flutter Service")),
      body: Column(
        children: [
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 18.0, vertical: 10),
            child: TextField(
              textAlign: TextAlign.center, //input aligns to center
              controller: textController, //assigns TextEditingController
            ),
          ),
          const SizedBox(
            height: 8,
          ),
          ElevatedButton(
            child: Text('Create File'),
            onPressed: () => createFile(
                textController.text), //calls createFile() when //button pressed
          ),
          ElevatedButton(
            onPressed: () async {
              await readFile(); //calls readFile()
              setState(() {}); //rebuilds the UI.
            },
            child: Text('Read File'),
          ),
         const SizedBox(
            height: 18,
          ),
          if (text != null) Text('$text') //text set if it's not null.
        ],
      ),
    );
  }
}

Output

When click the create file, that time a file is created under the app storage. To view the file, Using Android Studio, View -> Tool Windows -> Device File Explorer.

Now go to this location: Go for this location /data/data/com.example.your_app/app_name/text_file.txt

This is the output.

In conclusion, the Path Provide Flutter package is a useful for working with the file system on both Android and iOS devices. Path Provide Flutter allows developers to easily access and manipulate files and directories on the device. By using the provided methods, such as getApplicationDocumentsDirectory and getTemporaryDirectory, developers can easily access specific directories on the device.

Additionally, the package also allows for the creation, deletion, and manipulation of files and directories. Overall, the Path Provide Flutter package is a powerful package that can greatly simplify file system operations in Flutter apps.

How to Use For Loop in Flutter | Best Practice in 2023

Md Nazmul Islam

January 15, 2023

For loop is the most commonly used loop in programming languages. If you want to know How to Use For Loop in Flutter then you are in the right place. We will discuss the best practice for using the For Loop in Flutter.

We know that For loop is a loop that enables a particular set of conditions that will be executed repeatedly until a condition is satisfied. So for loop will execute the code a specific number of times. We know that for loop is the very basic loop in all programming languages.

What we will learn from this article:

Syntax of for loop in Flutter

for (initial_count_value; termination_condition; step) {
 // statements
}

Example of for loop

1st Example:

If you don’t need the index then you can consider the for-in loop. It’s very easy to read and more concise.

List<String> fruits= ['Apple', 'Banana', 'Mango'];
for (var fruit in fruits) {
  print(fruit );
}

// prints
'Apple'
'Banana'
'Mango'

2nd Example:

This example will provide you the index of the looping position.

void main() { 
   
   for(var j = 0; j < 4; j++) { 
     print(j); 
   } 
}

//prints
0
1
2
3

You also can use the loop on the widget to create a list of widgets. Let’s Use this For Loop in Flutter. You can see the output will be shown with the index number.

Full Code:

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.lightBlue,
      ),
      home: const MyHomePage(title: 'Flutter Service'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Future<bool> _onPop() async {
    return false;
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: _onPop,
      child: Scaffold(
        appBar: AppBar(
          centerTitle: true,
          title: Text(widget.title),
        ),
        body: Center(
          child: Column(
            children: [
              // you can add any widget here
              
              // below we use for loop
              for (int i = 0; i < 4; i++) ...{
                Card(
                  child: Container(
                      width: double.infinity,
                      padding: EdgeInsets.all(20),
                      child: Text("Item List - $i")),
                )
              }
            ],
          ),
        ),
      ),
    );
  }
}

Output

The output of this For Loop in Flutter will look like this:

This is how we can use the for loop in flutter with widgets children.

How to Override / Disable Back Button in Flutter the right way in 2023

Md Nazmul Islam

January 6, 2023

Are you looking for how to disable back button in flutter easily? You are in the right place. When users use your app, it is possible that they could unintentionally click the Back button and exit from the app. This can create a bad experience for your app. So it is always good to ask users if they are ready to exit the app. By default, from the home screen or app bar, if you press the back button you will exit from the app. So in this tutorial, we will show you that Disable Back Button in Flutter.

The output will be looks like this:

So what we will learn haaa? We will learn the following things from this article:

How to Disable Back Button in Flutter?
How to override and disable back button in Flutter?

How to Disable Back Button in Flutter

You can simply use the WillPopScope to disable the back button in Flutter. Now question is, what is WillPopScope? well, WillPopScope is a Flutter Widget that helps to get a callback when the back button is pressed.

So inside the WillPopScope callback, if you simply return false then the screen will not be popped, and the back button will be disabled, if you keep the callback return true then the screen will be popped.

Let’s see how can you do that:

Wrap Scaffold widget by using the WillPopScope like this:

WillPopScope(

onWillPop: _onPop,

child: Scaffold(

…………………………………………………..

Now add the _onPop parameter inside the WillPopScope. Then create a method and assign it to handle the callback.
Now keep return false inside the callback.

Code Example:

class _MyHomePageState extends State<MyHomePage> {
  Future<bool> _onPop() async {
    return false;
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: _onPop,
      child: Scaffold(
        appBar: AppBar(
          centerTitle: true,
          title: Text(widget.title),
        ),
        body: const Center(
          child: Text(
            "FLUTTER SERVICE HOME",
            style: TextStyle(fontWeight: FontWeight.bold),
          ),
        ),
      ),
    );
  }
}

How to override and disable back button in Flutter?

You need to use the WilllPopScope widget to override that back button in flutter and then show the confirmation dialog to the user if they want to exit or not. So what will happen? If the user clicks the back button, it will show a dialog and ask a user for exit confirmation. If the user presses Yes then it will exit if the user presses No then it will not exit.

Same as before,

Wrap Scaffold widget by using the WillPopScope like this:

WillPopScope(

onWillPop: _onWillPop,

child: Scaffold(

…………………………………………………..

Now add the _onPop parameter inside the WillPopScope. Then create a method and assign it to handle the callback.
Now add the AlertDialog widget inside the callback. Also, add options like Exit, Yes, or No using the TextButton or Elevated button what you like.
Keep the Navigator.of(context).pop(false) inside the onPress() to stop exiting the app.
Keep the Navigator.of(context).pop(true) inside the onPress() to exit the app.

Full Code Example:

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Future<bool> _onPop() async {
    return (await showDialog(
          context: context,
          builder: (context) => AlertDialog(
            title: new Text('Are you sure?'),
            content: new Text('Exit the App'),
            actions: <Widget>[
              TextButton(
                onPressed: () => Navigator.of(context).pop(false),
                //<-- SEE HERE
                child: new Text('No'),
              ),
              TextButton(
                onPressed: () => Navigator.of(context).pop(true),
                // <-- SEE HERE
                child: new Text('Yes'),
              ),
            ],
          ),
        )) ??
        false;
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: _onPop,
      child: Scaffold(
        appBar: AppBar(
          centerTitle: true,
          title: Text(widget.title),
        ),
        body: const Center(
          child: Text(
            "FLUTTER SERVICE HOME",
            style: TextStyle(fontWeight: FontWeight.bold),
          ),
        ),
      ),
    );
  }
}

So we have learned how to override the back button / disable back button in flutter easily. We have seen how to disable the back button using the WillPopScope widget. After that, we have using the override the back button and display the user confirmation dialog. If you still face any issues, please send us a message from the chatbox. We are here to support you.

Read More:

How to Use Flutter If Not boolean Value

How To Easily Use Font Awesome In Flutter | Simplified 2023

January 6, 2023

How To Easily Use Font Awesome In Flutter | Everything Simplified

This tutorial will enlighten you about how to easily use font awesome in flutter in brief!

Flutter provides an inbuilt icon pack for your app to use, but it only has a small selection of icon sets, so you must rely on other icon packs. One of the best icon sets for flutter or web applications is Font Awesome. To use Font Awesome icons in your app, see the example below.

People, who read this article also read: Flutter SDK Installation on Windows, macOS, Linux

You must first include the font_awesome_flutter Flutter Package in your dependency list. You should add the next line to your pubspec.yaml file.

dependencies:
  flutter:
    sdk: flutter
  font_awesome_flutter: ^8.8.1

Use the sets of Default Material Icons

import 'package:font_awesome_flutter/font_awesome_flutter.dart';

Icon(FontAwesomeIcons.cartPlus)

Font Awesome in Flutter Dimensions and Color

Icon(FontAwesomeIcons.user,
    size: 50, //Icon Size
    color: Colors.white, //Color Of Icon
)

Visit the Font Awesome website to learn the name of the icon. 1500+ icons are available for free. Use an icon’s name in Flutter by getting the name of the icon. Be careful because while the starting word in Flutter is similar, the Icon name is not exactly the same. The name will be suggested if you use Visual Studio Code with the Dart and Flutter extensions.

Font Awesome in Flutter Dimensions and Color

You can use Font Awesome icons by looking at the example below.

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';

class UseFontAwesome extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    return Scaffold(
       appBar: AppBar(
           title: Text("Use Icons"),
           leading: Icon(Icons.menu),
           //placing inbuilt icon on leading of appbar
           actions: <Widget>[
               
               IconButton(
                 onPressed: (){},
                 icon: Icon(FontAwesomeIcons.envelope), 
                 //using font awesome icon in action list of appbar
              ),

              IconButton(
                 onPressed: (){},
                 icon: Icon(FontAwesomeIcons.cartPlus), 
                 //cart+ icon from FontAwesome
              ),

              IconButton(
                 onPressed: (){},
                 icon: Icon(FontAwesomeIcons.userAlt), 
                 //cart+ icon from FontAwesome
              ), 
           ],
       ), //set app bar

       body: Container(
          height:300, //height of container
          alignment: Alignment.center, //alignment of content
          padding:EdgeInsets.all(20), //padding of container wrapper
          child:RaisedButton.icon(
                onPressed:(){
                    //action for raised button.
                }, 
                icon: Icon(FontAwesomeIcons.user,
                    size: 50, //Icon Size
                    color: Colors.white, //Color Of Icon
                ), 
                label: Text("Awesome", style: TextStyle(
                    fontSize: 60, //button font size
                    color: Colors.white //button font color
                ),),
                color: Colors.deepOrangeAccent, //color of button
          )
       )
    );
  }
}

Conclusion

In this manner, you can use Font Awesome in Flutter to enhance the visual appeal and usability of your app.

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Because of its efficiency and simplicity, the font awesome in Flutter is one of the most used components, especially in mobile applications. In this tutorial, we created a straightforward font awesome in Flutter using the built-in widget of the font awesome in Flutter. I sincerely hope you liked this tutorial!

Check the following video for more in-depth explanation:

How to Use Flutter If Not boolean Value in 2023

Md Nazmul Islam

January 2, 2023

The most common conditional statement is used flutter if not boolean value. This is very commonly used in different logical functions. In this article, we will discuss logical operators and flutter if not boolean value. bool is the type of Dart that represents a boolean value that can be true or false.

Flutter If Not boolean Value

The logical operator is the same in all languages. In dart, there is no difference. The logical operator also uses to combine or invert the boolean expressions.

Operator	Meaning
&&	Logical AND
\|\|	Logical OR
!expr	invert boolean

Example 1:

bool isDownloading = true;
bool isConnection = false;


assert(!isDownloading ); // true
assert(isConnection || isDownloading ); // true because at least one is true
assert(isDownloading && !isConnection); // true because both are true

Example 2:

Let’s consider, we will download a new mp3 from the URL. The important books is isDownloadReady. When it was true, then app start downloading, if not then it will not download the mp3. There have a gallery so I use a bool ifStorageFull, so if it is true then will appear a message that the storage is full, delete some mp3. Let’s consider that the gallery exists 50 mp3.

bool ifStorageFull;
int mp3;
@override
Widget build(BuildContext context) {
  if (mp3> 100) {
    ifStorageFull= true;
  } else {isStorageFull = false;}
return Container(
  child: ifStorageFull? Text("Delete some images") : Text("You can  add more pictures")
 );
}

So the schema is:

if (fullfilled condition) {
   yourBool = true;
} else {yourBool} = false;

Example 3:

// first assign

bool isFileExist = true;
bool isInternetConnection = true;

// we can combine boolean with  &&, ||, and other symbols
// if isFileExist is true AND isInternetConnection is true
bool isDownloadAnotherFile = isFileExist && isInternetConnection;

if (isDownloadAnotherFile ) {
  print("Downloading next file!");
} else {
  print("Downloading current File!");
}

At last of Flutter If Not boolean Value

Declare the bool with the name isAnyThing or isSomething. example: isDownloading, isFileExist.
Variable true or false check.
Execute the code after resulting in the true or false.

Top 3 Best Ways to Use Flutter Conditional Show Widget in 2023

Sarhan Bakshi

January 2, 2023

Top 3 Best Ways to Flutter Conditional Show Widget

This article will show the top 3 best ways to use the Flutter conditional show widget.

You teach machines (hardware) how to execute a process in application development (or, more specifically, software development in general) based on various conditions written in an if-else statement. It’s simple to write an if-else statement in a method or function when creating a Flutter app. However, there must have been a circumstance where you had to include the if-else statement inside your Flutter conditional show widget. Right? In this tutorial, we’ll look at three ways to use the if statement in a Flutter conditional show widget.

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We’ll talk about the following:

The Challenge

It doesn’t appear to be difficult to construct an if-else statement in a method or function. The error, however, appears when you attempt to use the if-else statement directly in your Flutter conditional show widget.

Unfortunately, unlike methods or functions, an if statement cannot be written inside a Flutter conditional show widget. However, there are a few different ways you can construct a conditional statement within your widget. Let’s view them now.

The conditional statement can be added to your widget in one of the following three ways.

As follows:

By means of the Ternary Operator
Making use of the Spread Operator
Utilizing the Method

Any of these can be used to create an if else statement in a Flutter conditional show widget based on your needs.

By means of the Ternary Operator

An operand for a ternary operator is three. The first condition is followed by an expression if the condition is true, and the third is an expression if the condition is false.

Here’s how it appears

(age > 18) ? 'Eligible for license' : 'Not eligible'

The code above states that a user is eligible for a license if their age is greater than 18, otherwise they are not.

We can employ a similar strategy in the Flutter code to display the widgets according to a condition. Let’s check how.

Example

Center(
    child: isLiked
        ? Row(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.end,
            children: const [
              Text(
                '12',
                style: TextStyle(fontSize: 120),
              ),
              Icon(
                Icons.thumb_up,
                size: 180,
                color: Color(0xff6ae792),
              ),
            ],
          )
        : const Icon(
            Icons.thumb_up,
            size: 200,
            color: Colors.black,
          ))

If a post has any likes, the code above will display the number of likes along with a like button. A simple “like” button is all else.

Output

How to use

Use the ternary operator only to check a single condition, if at all possible. The ternary operator should not be nested, and you should use the method to create multiple if-else statements. By doing this, clearer code will be produced.

Making use of the Spread Operator

To add multiple values to a Collection, use the spread operator (…). It first appeared in Dart 2.3. The spread operator must be contained within a collection widget, such as a Column, Row, or another widget.

The following is an example of how to write an if-else statement using the spread operator:

[
  if (age > 18) ...[
    // show license
  ] else ...[
    // show error message
  ]
]

The aforementioned code only displays the license if the user is older than 18.

Sample 1

Column(
  mainAxisAlignment: MainAxisAlignment.center,
  children: [
    if (isShowComment) ...[
      const Icon(
        Icons.comment,
        size: 200,
        color: Color(0xff6ae792),
      )
    ] else ...[
      const Icon(
        Icons.comment,
        size: 100,
        color: Colors.black,
      )
    ]
  ],
)

If the isShowComment variable is true, we display the comment icon inside the Column widget. If not, we display a different widget.

Sample 2

Column(
  mainAxisAlignment: MainAxisAlignment.center,
  children: [
    const Icon(
      Icons.thumb_up,
      size: 100,
      color: Colors.black,
    ),
    if (isShowComment) ...[
      const Icon(
        Icons.comment,
        size: 200,
        color: Color(0xff6ae792),
      )
    ]
  ],
)

This is an additional use case where we display several widgets in a column. If the value of isShowComment is true, we only choose to display a comment widget (along with a Like widget).

Sample 3

Column(
  mainAxisAlignment: MainAxisAlignment.center,
  children: [
    if (isShowComment) ...[
      const Icon(
        Icons.comment,
        size: 200,
        color: Color(0xff6ae792),
      )
    ] else if (isShowLike) ...[
      //Your widget
    ] else ...[
      //Your widget
    ]
  ],
)

As demonstrated in the code above, the spread operator can also be used to create multiple if-else statements.

Output

Flutter Conditional Show Widget If Else Statement

When to use: If your child is contained within a collection like a Column or Row, it is preferable to write conditional statements using the spread operator.

Utilizing the Method

If none of the methods mentioned above work for you, the next best thing to do is to use a method to write an if-else statement. A clearer code is produced when a condition statement is added to a method.

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Example:

Center(
  child: getLockStatus(),
)
Widget getLockStatus() {
  if (isLocked) {
    return const Icon(
      Icons.lock_outline,
      size: 200,
      color: Color(0xff6ae792),
    );
  } else {
    return const Icon(
      Icons.lock_open,
      size: 200,
      color: Colors.black,
    );
  }
}

A specific method is now where the if-else clause with a widget (to be returned) is located. In accordance with the return condition inside, the method returns the widget.

Output

How to use

If you want to write clean code and none of the other options work for you, writing a conditional statement inside the method is preferable.

Thanks!

Conclusion

The three approaches to writing an if else statement in a Flutter conditional show widget have been covered in this tutorial, along with a real-world example. Additionally, we discovered the best times to use each one based on your needs.

Would you like to view some additional engaging Flutter tutorials?

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FlutterService

FlutterService

Employers and Employees’ List of the Top Qualifications for Flutter Developers

Checklist for Flutter Developer Resume

What qualifications as a Flutter Developer should I emphasize on my resume?

What should my resume’s least important qualifications be for the position of Flutter Developer?

How can I ensure that every relevant keyword for a position as a Flutter Developer is on my Flutter Developer resume?

Table of Contents

Flutter Change Color of Text Locally

Example Code of Flutter Change Color of Text

Changing text color globally using ThemeData

Full Code

Output

Different Ways To add the Colors in Flutter

Code Example

Output

Conclusion

Listing Mobile Directory Apps & Templates

Table of Contents

1. FluxStore

2. Listar Flux – mobile directory listing app template for Flutter

3. Classima Listing App

4. Listar – mobile React Native directory listing app template

5. The City – Place App with Backend 7.2

Table of Contents

Flutter Path Provider Method

Path Provide Flutter

Example1: Get Temporary and Documents App Directory Path

Example 2: Read & Write a Text File

Full Code is

Output

Table of Contents

Syntax of for loop in Flutter

Example of for loop

Output

Table of Contents

How much does it actually cost to create an app using Flutter?

Flutter Developers: Who Are They?

Flutter Developer Salary In India, Canada, US

Salary of a typical Flutter developer

For Freshers

For Mid-Experts

For Senior Experts

Salary of a Flutter Developer in the US and Canada

Indian Flutter Developer PayScale

Conclusion

Table of Contents

How to Disable Back Button in Flutter

How to override and disable back button in Flutter?

Table of Contents

Use the sets of Default Material Icons

Font Awesome in Flutter Dimensions and Color

Conclusion

Flutter If Not boolean Value

Table of Contents

The Challenge

The Flutter Conditional Show Widget If Else Statement: Useful Techniques

Here’s how it appears

Example

Output

How to use

Making use of the Spread Operator

Sample 1

Sample 2

Sample 3

Output

Utilizing the Method

Example:

Output

How to use

Conclusion

FlutterService