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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.

12 3...6 Page 1 of 6

Mobile App Development

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Top 7 Shopify SEO app: short overview

Top 7 Shopify SEO app: in-depth reviews

1. Tapita SEO & Speed Optimizer

Tapita SEO & Speed Optimizer

2. SearchPie SEO & Speed optimize

SearchPie SEO & Speed optimize

3. Tiny SEO Image optimize, Speed

Tiny SEO Image optimize, Speed

4. SEO Manager | venntov

SEO Manager | venntov

5. AI SEO Optimizer ‑ SEOmatic

AI SEO Optimizer ‑ SEOmatic

6. GoSEO ‑ SEO Products Optimizer

GoSEO – SEO Products Optimizer

Table of Contents

Onest HRM Human Resource Management System App and Website | Flutter CRM Template

Features:

Onest CRM – Multiple Platform

Features

FieldManager | Field Employees GPS Real-time Tracking, Attendance, payroll System (.NET 6 & Flutter) | Flutter CRM App Template

Features:

Maan I HRM Employee Flutter UI Kit | Flutter CRM Template

Features:

Table of Contents

Business Listing Flutter App with Admin Panel | Business App Template

List of Features:

On-Demand Home Services, Business Listing, Booking Flutter UI Business App Template

List of Features:

Active Business App Template | Flutter Listing App

Features:

Listingo – Service Providers, Business Finder Android Native Business App Template

List of Features:

On-Demand Home Services, Business Listing, Handyman Booking with Admin Panel | Business App Template

List of Features:

Table of Contents

Android Live Smart TV App Template: Movies, TV Shows, Web Series, and Original Content

Features

HOW IT WORKS:

Flix App: Movies, TV Shows, Live TV, and TV Cast

FEATURES :

The Stream: Live Smart TV App Template & Video Streaming App

Features

OXOO TV – Support for OVOO and OXOO on Android TV, Android TV Box, and Amazon Fire TV

Services:

Android HD Video App (YouTube, Server Videos)

Google Android:

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