#Const in Dart

[arjunphp-blog]

Difference between Const and Final in Dart

In Dart, final and const are both used to declare variables that cannot be reassigned once they are initialized. However, there are some differences between them Mutability final variables can only be assigned once. Their value can be set at runtime and is evaluated when assigned. const variables are implicitly final but are compile-time constants. They are constants at compile time, meaning…

[siddhiinfosoft5]

Optimizing Flutter App Performance: Techniques and Tools

An app’s performance plays a crucial role in shaping the user experience. Today’s users expect mobile apps to load instantly, scroll seamlessly, and respond immediately to every touch. And when you're working with Flutter App Development, performance isn't just a luxury — it's a necessity.

At Siddhi Infosoft, we specialize in delivering top-notch Flutter Application Development Services. Over the years, we've worked on a wide range of Flutter apps — from sleek MVPs to full-featured enterprise apps. One thing we’ve learned: performance optimization is an ongoing process, not a one-time task.

In this blog, we’re diving deep into how to optimize your Flutter app’s performance using proven techniques and powerful tools. Whether you’re a developer or a business looking to fine-tune your Flutter app, these insights will guide you in the right direction.

Why Flutter App Performance Matters

Flutter offers a single codebase for both Android and iOS, fast development cycles, and beautiful UIs. But like any framework, performance bottlenecks can creep in due to poor coding practices, heavy widget trees, or inefficient API calls.

Here’s what poor performance can lead to:

High uninstall rates

Negative user reviews

Low engagement and retention

Decreased revenue

That’s why performance optimization should be a key pillar of any Flutter App Development strategy.

Key Techniques to Optimize Flutter App Performance

1. Efficient Widget Tree Management

Flutter revolves around widgets — from layout design to app logic, everything is built using widgets. But deep or poorly structured widget trees can slow things down.

What to do:

Use const constructors wherever possible. Const widgets are immutable, meaning they don’t change and won’t rebuild unless absolutely necessary

Avoid nesting too many widgets. Refactor large build methods into smaller widgets.

Prefer ListView.builder over building a list manually, especially for long lists.

2. Minimize Repaints and Rebuilds

Excessive UI rebuilds consume CPU resources and slow the app.

Pro tips:

Use setState() judiciously. Calling it in the wrong place can cause the whole widget tree to rebuild.

Use ValueNotifier or ChangeNotifier with Provider to localize rebuilds.

Use the shouldRepaint method wisely in CustomPainter.

3. Lazy Loading of Assets and Data

Loading everything at once can cause UI jank or app freezing.

Optimization tips:

Lazy load images using CachedNetworkImage or FadeInImage.

Use pagination when loading data lists.

Compress images before bundling them with the app.

4. Efficient Use of Animations

Animations add to UX, but if not optimized, they can slow the frame rate.

Best practices:

Use AnimatedBuilder and AnimatedWidget to optimize custom animations.

Avoid unnecessary loops or timers within animations.

Keep animations simple and leverage hardware-accelerated transitions for smoother performance and better efficiency.

5. Reduce App Size

Lighter apps load faster and use less memory.

How to reduce size:

Remove unused assets and libraries.

Use flutter build apk --split-per-abi to generate smaller APKs for different architectures.

Use ProGuard or R8 to minify and shrink the Android build.

Tools to Boost Flutter App Performance

Now that we’ve covered the techniques, let’s explore some tools that every Flutter Application Development Services provider should have in their toolkit.

1. Flutter DevTools

Flutter comes with a built-in suite of performance and debugging tools to help you monitor, optimize, and troubleshoot your app efficiently.

What it offers:

UI layout inspection

Frame rendering stats

Memory usage insights

Timeline performance tracking

How to use: Run flutter pub global activate devtools, then launch it via your IDE or terminal.

2. Performance Overlay

Quickly visualize your app's rendering performance.

How to activate:

dart

CopyEdit

MaterialApp(

  showPerformanceOverlay: true,

  ...

)

What it shows:

Red bars indicate UI jank or frame drops.

Helps detect where the app is not maintaining 60fps.

3. Dart Observatory (now part of DevTools)

This is useful for:

CPU profiling

Memory leaks detection

Analyzing garbage collection

It’s especially valuable during long testing sessions.

4. Firebase Performance Monitoring

Ideal for monitoring production apps.

Why use it:

Monitor real-world performance metrics

Track slow network requests

Understand app startup time across devices

At Siddhi Infosoft, we often integrate Firebase into Flutter apps to ensure real-time performance tracking and improvement.

5. App Size Tool

Use flutter build --analyze-size to identify which packages or assets are increasing your app’s size.

This helps you:

Trim unnecessary dependencies

Identify heavy assets

Make data-driven optimization decisions

Real-World Optimization Example

Here’s a quick case study from one of our Flutter projects at Siddhi Infosoft.

Client Problem: The app had long initial loading times and frequent stutters when scrolling through large data lists.

Our Optimization Approach:

Replaced ListView with ListView.builder

Implemented data pagination

Cached images using cached_network_image

Applied flutter build apk --split-per-abi to reduce APK size

Result:

Initial load time reduced by 40%

Smoother scrolling with no jank

App size reduced by 28%

User session duration increased by 25%

Common Flutter Performance Pitfalls to Avoid

Even seasoned developers can fall into traps. Here are some common mistakes:

❌ Overusing setState()

Leads to unnecessary rebuilds. Utilize state management solutions like Provider, Riverpod, or Bloc to maintain clean architecture and ensure efficient app performance.

❌ Not Using const Widgets

If a widget doesn’t need to be rebuilt, mark it as const to avoid overhead.

❌ Ignoring Async Operations

Avoid blocking the UI thread with heavy synchronous operations. Use Future, Isolate, or compute functions for heavy processing.

❌ Too Many Repaints

Use RepaintBoundary for parts of the widget tree that don’t need to repaint often.

Flutter App Performance Checklist

Here’s a quick checklist to keep your Flutter app performing at its best:

✅ Use const wherever possible ✅ Optimize widget build methods ✅ Avoid unnecessary rebuilds ✅ Use lazy loading for lists and images ✅ Monitor app size ✅ Test on real devices regularly ✅ Use DevTools and Performance Overlays ✅ Optimize network and API calls ✅ Keep animations efficient ✅ Profile before release

Final Thoughts

Flutter is powerful, but like any tool, its efficiency depends on how you use it. By applying the right techniques and tools, you can significantly enhance the speed, responsiveness, and user experience of your mobile application.

At Siddhi Infosoft, we’re passionate about building Flutter apps that don’t just work — they fly. Whether you’re building a new app or looking to optimize an existing one, our team is here to help you deliver an exceptional experience.

Looking to boost your Flutter app’s performance? Let’s talk. Our Flutter experts are just a message away.

Resource: Optimizing Flutter App Performance: Techniques and Tools

[softloomtraining]

Top Mistakes Beginners Make in Flutter (and How to Avoid Them)

Flutter is a powerful toolkit for creating apps on multiple platforms using a single codebase. However, beginners often face challenges as they get started. Common issues include misunderstanding widget structure, misusing stateful and stateless widgets, and ignoring proper state management. These mistakes can lead to messy code, poor performance, and difficult debugging. Recognizing these errors early helps developers write cleaner, more efficient apps and prevents long-term complications. With a focus on best practices, beginners can avoid frustration and quickly build functional, responsive interfaces. Learning from these early mistakes is a key step in mastering Flutter development.

1. Ignoring the Widget Tree Structure

Mistake: Many beginners start building UI without understanding the widget hierarchy. This leads to messy, hard-to-maintain code.

Solution: Learn the widget tree concept early. Break down your UI into smaller widgets. Use Column, Row, and Container wisely, and always aim for clean and readable structure.

2. Misusing Stateful and Stateless Widgets

Mistake: Using a StatefulWidget where a StatelessWidget would do, or vice versa, often results in unnecessary complexity or performance issues.

Solution: If your widget doesn't need to rebuild when something changes, keep it stateless. Only use stateful widgets when dynamic data is involved

3. Poor State Management

Mistake: Relying on setState() for everything or avoiding state management altogether can make apps buggy and difficult to scale.

Solution: Explore popular state management solutions like Provider, River pod, or Bloc. Pick one that fits your app’s complexity and stick to best practices.

4. Not Using Widgets Reuseably

Mistake: Copying and pasting code instead of creating reusable components can lead to code duplication and bloat.

Solution: Turn repetitive UI patterns into custom widgets. This makes your code modular, testable, and easier to maintain

5. Overlooking Performance Optimization

Mistake: Beginners often ignore performance until the app becomes slow or laggy, especially when building large UIs.

Solution: Use the Flutter DevTools to monitor performance. Avoid unnecessary rebuilds with tools like const constructors and shouldRebuild logic in custom widgets.

6. Forgetting to Handle Null Values

Mistake: Null safety in Dart is strict, and ignoring it leads to runtime errors that crash your app.

Solution: Always check for null values. Use the ?, !, and late keywords responsibly and understand what they mean in context.

7. Lack of Testing

Mistake: Skipping tests may not hurt early, but it creates big issues as the codebase grows.

Solution: Write unit tests, widget tests, and integration tests regularly. Flutter makes testing easier with built-in support-use it from day one.

8. Not Adapting for Different Screen Sizes

Mistake: Hardcoding dimensions results in layouts that break on different devices.

Solution: Use responsive design principles. Widgets like Expanded, Flexible, and MediaQuery help you build adaptable UIs for various screen sizes

9. Overcomplicating Navigation

Mistake: Beginners often over-engineer navigation with deeply nested routes or inconsistent logic.

Solution: Start simple with Flutter's built-in Navigator. When your app grows, consider using go_router or auto_route for better route management

10. Not Keeping Code Organized

Mistake: Putting all code into main. dart or a few large files makes your project hard to manage.

Solution: Organize code into folders like screens, widgets, models, and services. Follow clean architecture as your project scales.

Learning Flutter is an exciting journey, but being aware of these common mistakes can help you grow faster and code better. Focus on writing clean, reusable code, and don’t hesitate to learn from the vast Flutter community

[hbittechno]

Flutter App Development Guide 2025: Challenges & Best Practices

Introduction

Flutter has become widely popular in the mobile development space, with an increasing following due to its cross-platform nature and one codebase that can ship to iOS, Android, web, and desktop. As technology continues to grow, developers have to keep pace with the newest best practices to develop high-quality, maintainable, and performant apps. In this guide, we will discuss the primary challenges and best practices of Flutter app development in 2025.

Flutter App Development Challenges (2025) a) App Performance Optimization

Challenge: While apps are growing more complex, keeping them fast across various devices is still a major challenge. Flutter apps, particularly complex high-graphics or high-complexity UI ones, can suffer from performance hiccups.

Solution:

Make use of Flutter De tools: The set of Flutter tools permits detailed profiling and performance analysis. Utilize it to detect UI thread jank or memory leak.

Efficient Rendering: Prevent unnecessary re-renders by employing the const keyword and good state management practices to reduce widget rebuilds.

b) Platform-Specific Customization

Challenge: Getting platform-specific looks and behaviors may be challenging, particularly when you require native-like performance or look for iOS and Android.

Solution:

Employ Platform Channels to interact with platform-specific code, allowing access to native features or behaviors.

Take advantage of the Cupertino widgets for iOS-like UI and Material widgets for Android to provide a more native experience.

c) Dependency Management and Package Compatibility

Problem: Third-party package management can become complicated as the number of packages increases, particularly when dependencies are old or unsupported for newer Flutter versions.

Solution:

Periodically audit and update your dependencies with the flutter pub outdated command.

Always use well-maintained packages with active community support and regular updates.

Use Flutter’s versioning system to ensure compatibility between Flutter versions and dependencies.

d) Complex State Management

Problem: There are many methods for state management that Flutter provides, but the choice of which one is best for the complexity of your app is paramount.

Solution:

For simple apps, Provider or River pod can be used.

For complex apps, use Bloc (Business Logic Component) or GTX, which offer more sophisticated state management features with separation of concerns.

e) Cross-Platform Testing

Challenge: Cross-platform testing across iOS, Android, Web, and Desktop can be prone to fragmentation and inconsistent behavior.

Solution:

Write unit tests for core functionality and utilize widget tests to validate UI consistency between platforms.

Employ integration tests to simulate user interactions and detect cross-platform discrepancies.

Take advantage of Firebase Test Lab or Code magic for automated testing on different devices and platforms.

Best Practices for Flutter App Development (2025)

a) Maintain the UI Responsive and Adaptive

Best Practice: Make sure the UI of the app responds to different screen sizes and orientations

Utilize Layout builder and Media query to respond to screen sizes.

Don’t hard code size or margin, and instead use Fractionally sized boxes and Flexible widgets.

Always use Scaffold with a Drawer for easy navigation and uniform user experience on mobile.

b) Use Null Safety to Prevent Errors

Best Practice: Use Dart’s null safety to the fullest, ensuring variables cannot have null values unless permitted.

This eliminates a big class of runtime errors and makes code more understandable.

c) Take Advantage of Flutter’s Hot Reload for Accelerated Iteration

Best Practice: Utilize Flutter’s hot reload to witness the changes without having to restart the application. This saves plenty of development time and enhances productivity.

d) Code Modularity and Clean Architecture

Best Practice: Employ a modular development technique where various components of the app are decoupled into distinct packages or modules.

Implement Clean Architecture or My VM (Model-View-ViewModel) for decoupling business logic, UI, and data management. This enhances maintainability and scalability.

e) Manage A sync Operations Efficiently

Best Practice: Flutter asynchronous operations (e.g., by using Future, Stream) are essential in order to deal with network requests or long-running tasks.

Implement async/await in order to keep asynchronous code easier to write and maintain.

Manage loading states and errors gracefully by using Future builder and Stream builder.

f) Optimize for Battery and Performance

Best Practice: Mobile apps can drain battery life if not optimized properly.

Profile your app’s performance to identify areas where the CPU or GPU is overused.

Use Flutter’s Deferred Loading for loading parts of the app on demand, especially for large apps.

Reduce unnecessary background tasks or use background services efficiently.

g) Secure the App

Best Practice: Security must be a priority while creating mobile apps.

Utilize HTTPS for all network requests to encrypt data in transit.

Save sensitive information in secure storage using Flutter Secure Storage or Keychain (iOS) and Key store (Android).

Use proper authentication mechanisms such as Oauth or JWT to authenticate secure user logins.

h) Regularly Update Flutter & Dependencies

Best Practice: Flutter is constantly changing, so it’s best to keep up-to-date.

Run flutter upgrade regularly to keep you updated with the latest stable Flutter SDK.

Keep packages up to date, but always check for breaking changes before updating.

i) Effective Error Handling and Debugging

Best Practice: Good error handling and debugging practices are essential.

Always wrap code that might throw exceptions in try-catch blocks.

Log errors with Flutter’s logging package or third-party solutions such as Sentry for real-time error tracking.

Flutter App Development Tools and Resources

a) Flutter Dev tools

Needed for performance profiling and debugging. Be sure to use it for inspecting network requests, widget trees, etc.

b) Dart pad

A web-based tool for rapid prototyping of Flutter apps or for experimenting with Dart code.

c) Firebase

Using Firebase for backend functionality is a prevalent and effective practice in Flutter. It offers easy-to-use solutions for push notifications, authentication, real-time databases, and analytics.

d) Code magic

For continuous integration and delivery (CI/CD) specifically designed for Flutter applications, Codemagic assists in automating build, test, and deploy.

e) Flutter Community

Join the Flutter community through forums such as Stack Overflow, Flutter Dev Discord, or Reddit. There are several open-source packages and plugins that you can use in your projects.

Conclusion

The prospects for Flutter app development are promising, with constant enhancements and a growing ecosystem. By keeping in touch with new features and best practices, you can overcome common issues and develop high-performance, maintainable, and user-friendly apps. Regardless of whether you’re new to development or have years of experience, adhering to these best practices will make you create stable apps without facing common pitfalls.

[bdayg1rl]

Ronald:

Bueno, aquí estoy escribiendo esto después de haberte amenazado con no festejarte (que conste que era broma... o no). Ya sé que últimamente no he estado del todo presente, pero oye, es tu cumpleaños y es la excusa perfecta para ponerme un poco pegajoso sin que me lo eches en cara después. Conociendo cómo somos, tal vez lo usarás para molestarme, aunque mayormente fingimos locura para evitar un momento incómodo, que va más allá de nosotros siendo, simplemente, nosotros.

La verdad nunca sé qué decir en estas fechas. No porque no tenga nada que decir — que mira que aguantarte todos estos años da para escribir un montón —, sino porque me da un poco de vergüenza ponerme sentimental contigo, porque, como sabrás, esto no es lo mío. Todavía me da risa recordar cómo empezó todo esto. ¿Quién iba a pensar que después de tres-cuatro años seguiríamos aguantándonos mutuamente?

Mira, voy a ser sincero — aprovecha porque no pasa seguido —, me salvaste sin darte cuenta. Y sí, ya sé que ahora vas a usar esto para presumir que tengo un lado sensible cuando se trata de ti, pero es verdad. Te has quedado incluso después de conocer mis partes complicadas, y sigues aquí cuidándome más de lo que yo lo hago. Aunque tampoco te creas mucho, que cuando me pongo protector contigo me vuelvo insoportable, y es que siento que una parte muy importante de mi corazón está peligrando. Quedarme sin hacer nada no es una opción, necesito que estés bien para poder estarlo. Y perdón si a veces me paso de entrometido y olvido cuál es mi lugar, es sólo que quiero asegurarme de que una de mis personas favoritas esté bien. Qué puedo decir, me importas más de lo que me gustaría admitir. Lo que me lleva a confesar que este último año he descubierto algo que me aterra un poco; lo que te afecta me afecta, y eso solo confirma lo que ya sospechaba... te estoy queriendo con todo lo que soy, con todo lo que puedo y hasta más.

Es raro esto de ser cariñoso contigo porque siempre andamos en nuestra dinámica de molestarnos mutuamente — que siendo honesto, es mucho más divertido —. Pero hoy es tu día y puedo hacer una excepción. Solo por hoy, ¿entendido? Mañana volvemos a la normalidad.

Te amo muchísimo, agente Sumi. Gracias por ser una de mis mejor amiga y por no mandarme a volar cuando me pongo pesado. ¡Feliz cumpleaños, chu-chumis!

[lemecdlucas]

                              🌾 ❛❛🐺💘🌚—¿En serio?—Los ojos de Nick se iluminaron y su corazón se aceleró. —Es lindo saberlo, quiero hacer que está sea la mejor de tus eras, te mereces todo, Taru y no importa que ya tengas todo porque hayas vivido por siglos, sino, todo lo que pueda darte y todo lo que tú me pidas—Sonrió acariciando sus cabellos. Lo siguiente le hizo sonreír—Bueno, me da animos que tengas fe en mi—Entonces si Tarik lo decía era porque veía en él algo que por sí mismo aún no veía. —Prometido, siempre lo vamos a hacer—Prometido por ellos porque sabía que lo amaban tanto como él. —Todo los besos que quieras ¿eso le parece suficiente a su majestad?—Coqueteó volviendo a atrapar su piel en sus labios.—Bueno, solo porque ahora sé que es muy especial al espera—Definitivamente necesitaba contarle a Kellan para que ambos supieran lo especial que sería ser los esposos de Tary y Daeron. —¿Podrías ser mayor?—Preguntó con una risita. —Que bueno que sean consientes de ello, porque los 3 se ven muy guapos—Coqueteó con una sonrisa cariñosa. —Eso sonó como algo que Kellan diría ¿Es el guión de coquetos?—entrecerró la mirada como si lo acusara pero, estaba ocultando una sonrisa.—Bueno, conste. No te vaya a gustar nadie más, eh—Lo abrazó como si justo ahora alguien se lo fuera a llevar. —Me gusta como suena en grupo—Le guiño.

Le gustaba provocar a Tarik de esa manera, podía sentirlo en su respiración y en propia piel. Asintió para que Tarik acariciara sus cabellos, necesitaba de ello porque su tacto le encantaba. Acarició su abdomen, mientras sus labios bajaban a su entrepierna.

                        🌾 ❛❛ 🧛🏻‍♂️���️👑Sonrió totalmente satisfecho por ello. —Me gusta esa confianza tuya, siempre te lo haré saber de todos modos—De cualquier forma era un honor poder hacer sentir querido a Kellan, después de que él le había dado tanto ahora era turno de Daeron de dárselo a él. —Me gusta saber que lo soy—Replicó sinceramente sintiéndose realmente querido sinceramente, porque en ese mundo donde Tarik y él se movían los afectos sinceros eran algo casi inexistente. —Te llevaré a todos lados conmigo, eres parte de mi—Prometió tomando su mano para materializar sus palabras. —La verdad sí, es mejor entre 4, tú y Nick son nuestra adoración—Habló por su alma gemela, pues era un hecho que compartían esos afectos. —Sí, mejor a mi lado, no estaría tranquilo si te meto en la maleta y te vayan a maltratar—Bromeó abrazando a Kellan como si estuviera protegiéndolo. Sí, todo lo que hacía por él era para protegerlo esperaba que llegado el momento así lo entendiera su novio, no quería perder ese amor tan lindo de Kellan. Asintió con una sonrisa dejando un beso en su frente. —Buena suerte con ello, no te va a funcionar mucho tiempo, solo será momentáneo—Lo molestó sabiendo que si se lo proponía podía lograrlo. —Lo digo en serio, adelante, cobra lo mío aprovecha.—Ofreció con una sonrisa, luego le cobraría a Tarik el dejar que Kellan cobrara lo suyo.—Que bueno que lo sepan—Sonrió encantado por esa muestra de cariño.

Siempre le suponía una calma inmensa al estar así junto Kendall, sentir su piel, escuchar su corazón, su aroma...todo. Siguió disfrutando su piel, sintió un escalofrío agradable por el recorrido de Kellan por su cuerpo, haciéndole suspirar por la agradable sensación del destino, dejando una pequeña mordida en su cuello para continuar besándolo.

🧑🏼‍🎤💖🎵. Podría ser una pregunta complicada; pero no lo era. Tarik estaba al tanto de cada una de sus vivencias: felicidad, alegría, perdida, enseñanza... Podía enumerarlas, y aún así sería una lista larga. Mas, en este siglo había un descanso mental, porque se había permitido ser él mismo y sentir amor; así que negó con la cabeza mientras le sonreía. —No, corazón, ahora es diferente, es un tipo distinto de felicidad —admitió. Daeron lo sabía, se lo había explicado, ahora podía contárselo a Nick—. Lo creo, Nick. Ahora no lo sabes, pero un tiempo mirarás hacia atrás y esto te parecerá curioso, simplemente —le contó, dispuesto a ayudarle para convertirse en una mejor versión—. Siempre deben hacerlo —exclamó con una sonrisa, para luego ladear el hombro—. No lo sé, ¿qué tienes para mí? —Cuestionó sonriendo de lado, disfrutando el beso en su cuello—. Muy bien, te recordaré esto cuando seas impaciente, mi lobito —le dijo con una sonrisa. Él también quería unir su vida a las suyas; pero aún tenían cosas por hacer. A diferencia de los demás, él podía ser paciente; esperar y ver todo lo que lograban y anhelaban, y entonces que volviesen a él, listos para la aventura—. Sí, son pocos —dijo riendo, sabiendo que no—. Eso lo sabemos —sonrió al ver que su novio cedía—. Hey, yo no soy coqueto con los demás, sólo con ustedes —se defendió—, pero no puedo evitar que me otras personas me vean así —justificó—, no hay porque preocuparte, a mí nadie me interesa como ustedes —agregó—. Uh, no sé, al parecer tengo mucho por lo que responder, tal vez deba contárselos en grupo... —Así podría coquetearles a los tres.

Los labios de Nick le provocaban, mordiendo su labio inferior y deseando que continuara. Tras realizar su pequeña desobediencia, le miró, para poder observar esa mirada traviesa y atrevida que tanto le gustaba. Le hizo todo más sencillo al mover sus piernas, dispuesto a hacer todo lo que le pidiera.

💖🧙‍♀️✨. —Soy muy consciente de cuanto me quieres, cariño —le dijo sinceramente. Nunca llegó a dudarlo, mas bien, llegó a pensar que no pasaría, pero ahora que era suyo, entendía que su amor era sincero—. Lo eres, eres muy, muuuuy especial —enfatizó con una risita risueña—. Es bueno escucharlo —dijo, esperando que no lo dejara a fuera nuevamente, por ninguna razón—. Nadie podría decirlo —rió—, supongo que entre 4 es mejor —presumió, pensando que no cambiaría nada del camino si este era el resultado, era una compensación maravillosa—. Oh, buena idea, llevarme en brazos suena bien —simuló que era la idea más adecuada para alguien de su altura, evitando reírse—. Eso me basta. —La promesa de Daeron era más que suficiente, pues sabía que en el proceso de su relación no estaba herirlo, de ninguna manera. Rió por su piquete—. Ah, estoy seguro que hay un hechizo para todo —le sacó la lengua—. ¿Puedo cobrar lo tuyo? No me des opciones, cariño, soy capaz —sonrió maliciosamente—. Lo sabemos. —Tronó un beso en su mejilla.

Definitivamente aquí se estaba mejor, aunque podría decir lo mismo de cualquier sitio en el que estuviera con Daeron. Sí, en efecto, lo importante era estar con él. Envolvió a su novio en sus brazos, disfrutando de ese toque en su cuello, mientras su mano se escapaba hasta su abdomen, y luego a su entrepierna.

[monikavayuz]

Elevating User Engagement: Mastering Notifications and Background Tasks in Flutter

In the ever-evolving landscape of mobile app development, creating engaging user experiences goes beyond the confines of the foreground. Flutter, Google's UI toolkit for building natively compiled applications, empowers developers to implement sophisticated notification systems and execute essential background tasks seamlessly. In this blog, we'll explore the realm of notifications and background tasks in Flutter, unraveling the techniques, use cases, and best practices for enhancing user engagement.

Unveiling the Power of Notifications:

Notifications serve as a bridge between your Flutter application and its users, offering a means to convey timely information and encourage re-engagement. A leading Flutter app development company can utilize a robust set of tools and plugins to implement both local and push notifications.

Implementing Local Notifications in Flutter:

Flutter developers can utilize plugins like flutter_local_notifications to implement local notifications. These notifications are triggered within the app itself and are particularly useful for scenarios such as reminders, updates, or events.

Installing the Plugin: Add the flutter_local_notifications dependency to your pubspec.yaml file:

yaml

Copy code

dependencies: flutter_local_notifications: ^X.Y.Z

Configuring Local Notifications: Initialize the plugin and configure local notifications:

dart

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import 'package:flutter_local_notifications/flutter_local_notifications.dart'; FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin(); void initializeNotifications() async { final InitializationSettings initializationSettings = InitializationSettings( android: AndroidInitializationSettings('app_icon'), iOS: IOSInitializationSettings(), ); await flutterLocalNotificationsPlugin.initialize(initializationSettings); }

Showing Local Notifications: Trigger local notifications within your Flutter app:

dart

Copy code

void showLocalNotification() async { const AndroidNotificationDetails androidPlatformChannelSpecifics = AndroidNotificationDetails( 'your_channel_id', 'your_channel_name', 'your_channel_description', importance: Importance.max, priority: Priority.high, ); const NotificationDetails platformChannelSpecifics = NotificationDetails(android: androidPlatformChannelSpecifics); await flutterLocalNotificationsPlugin.show( 0, 'Notification Title', 'Notification Body', platformChannelSpecifics, ); }

Harnessing the Potential of Push Notifications:

For real-time updates and engagement outside the app, Flutter developers can integrate push notifications. This involves using services like Firebase Cloud Messaging (FCM) for delivering notifications to users' devices.

Setting up Firebase Cloud Messaging: Integrate Firebase Cloud Messaging into your Flutter app by adding the necessary dependencies and configurations:

dependencies: firebase_messaging: ^X.Y.Z

Handling Push Notifications: Implement the handling of incoming push notifications:

import 'package:firebase_messaging/firebase_messaging.dart'; FirebaseMessaging _firebaseMessaging = FirebaseMessaging(); void configureFirebaseMessaging() { _firebaseMessaging.configure( onMessage: (Map message) async { // Handle incoming message while the app is in the foreground print("onMessage: $message"); }, onLaunch: (Map message) async { // Handle notification launch while the app is in the background print("onLaunch: $message"); }, onResume: (Map message) async { // Handle notification resume while the app is in the background print("onResume: $message"); }, ); }

Executing Background Tasks in Flutter:

In addition to notifications, executing background tasks is crucial for keeping the app's data up-to-date, performing periodic tasks, and optimizing resource usage.

Background Execution Using Isolates: Utilize Dart isolates to perform tasks in the background without affecting the main UI thread:

import 'dart:isolate'; void backgroundTask() { // Your background task logic here } void main() { Isolate.spawn(backgroundTask, 'Background Isolate'); }

Background Execution with Flutter Workmanager: Employ plugins like flutter_workmanager for scheduling and executing background tasks:

dependencies: flutter_workmanager: ^X.Y.Z

dart

Copy code

import 'package:flutter_workmanager/flutter_workmanager.dart'; void callbackDispatcher() { FlutterWorkManager.executeTask((task, inputData) async { // Your background task logic here return Future.value(true); }); } void initializeWorkManager() { FlutterWorkManager.initialize(callbackDispatcher); }

Best Practices for Notifications and Background Tasks:

Respect User Preferences: Allow users to customize notification preferences and respect their choices regarding push notifications. Provide options for opting in or out of specific types of notifications.

Optimize Notification Content: Craft concise and informative notification content. Users should understand the purpose of the notification at a glance.

Handle Notification Interactions: Implement handling for user interactions with notifications. Direct users to relevant sections of the app when they tap on a notification.

Use Background Execution Wisely: Optimize background tasks to consume minimal resources. Schedule tasks during low-power periods to minimize impact on device performance and battery life.

Test on Various Devices: Test notification and background task functionality on different devices and operating system versions to ensure consistent behavior.

Update Dependencies Regularly: Keep notification-related and background task-related dependencies up-to-date. Regularly check for updates and apply them to benefit from bug fixes and enhancements.

Conclusion: Crafting a Seamless Mobile Experience

Notifications and background tasks play pivotal roles in creating a seamless and engaging mobile experience. By mastering the implementation of local and push notifications, as well as background execution, Flutter app development companies can enhance user engagement, provide timely information, and ensure the app remains optimized even when not in the foreground.

As Flutter continues to evolve, developers can expect further enhancements and features in the realm of notifications and background tasks. By staying abreast of best practices and leveraging the capabilities provided by Flutter and associated plugins, developers can elevate their apps to new heights, delivering experiences that resonate with users and keep them coming back for more.

[devtech-ascendancy-hub]

深入解析 Dart 語言：命名慣例、類特性、建構函數與抽象特性

在這篇文章中，我們將深入探討 Dart 語言的基礎與進階概念。內容涵蓋檔案與方法命名慣例、類的特性、建���函數的使用與優化（包括 const 和 factory 建構函數），並比較 Dart 與 C++ 的初始化列表。最後，我們將討論 Dart 的抽象設計，如抽象類、介面、與混合類（mixin），並解析多重繼承與方法解析順序（MRO）的特性。無論你是初學者還是有經驗的開發者，本文都能提供實用的知識

Overview of Content 在這篇文章中，我們將全面探索 Dart 語言的核心基礎概念，無論你是 Dart 初學者還是有經驗的開發者，都能在這裡找到實用的知識。本文涵蓋了 Dart 檔案與方法的命名慣例，深入剖析類的特性，包括成員屬性域的訪問權、屬性 Getter & Setter 的使用、操作符重載、以及 Enum 類等進階功能 此外，文章詳細介紹了 Dart 的建構函數，包括命名建構函數的意義、初始化列表的應用、建構函數重定向及其限制，以及如何使用 const 和 factory 建構函數來提升效能與靈活性。我們也會比較 Dart 與 C++ 在初始化列表上的異同（也會適時的與 Java 語言做比較） 最後，對於面向對象設計中的抽象設計部分，我們將討論 Dart 的抽象類、介面、以及混合類 mixin 的使用，並深入解析多重繼承和菱形問題的解決方案，幫助你掌握…

[infowindtech24]

Hire Dedicated Flutter App Developers In India (Within 24 Hours)

For your project, are you going to hire dedicated flutter app developer ? We have put together a list of the most important questions you should ask potential Flutter developers before hiring them for your project in order to help you choose the best one. 

Flutter: What Is It?

 Flutter is a UI-based tool for making mobile apps. It uses only one programming language and codebase; you can use Flutter to build native mobile apps. With the correct skill sets, one can write attractive and quick mobile apps with Flutter. The Flutter work was created by Google, and the source code is available. While Flutter uses the Flutter Dart language for development, it is not a language in and of itself. Using it, you can write code for iOS and Android. Mobile 2D applications are the best candidates for this optimization. 

What Benefits Does Utilizing Flutter Offer? 

When building mobile applications, Flutter offer following benefits:- 

Cut down on the amount of code—Flutter's hot reload function contributes to better speed. To speed up app development, the application is written in C/C++ code, which is as near to machine code as feasible. Flutter's widget availability and usage of reused code cut down on the amount of time spent developing. 

Cross-Platform development: To save the development team time and effort, Flutter code may be applied to several platforms. 

Live and Hot Reloading: It facilitates easier and quicker code writing. When a modification is made, the code may be readily altered. 

Flutter code is as similar to machine code as possible, so it functions just like a native program. This lowers the mistakes brought on by code interpretation. The programmed applications are quick and simple to use, and they operate in a native environment. So hire best flutter app developer in India.

What are FlutterFlow's shortcomings, in your opinion? Although FlutterFlow works well for most UI designs, implementing more complicated animations directly in the visual editor might take a lot of work. Additionally, additional human intervention outside of FlutterFlow may be necessary to run really large-scale projects with several screens and intricate state management. 

How do you manage version control and collaboration in Flutterflow projects?

Could you describe the FlutterFlow theme and style management system? FlutterFlow's design framework enables us to specify and use themes and styles across the application. To guarantee design uniformity across all screens and components, we established global themes for font, color, and space. 

Have you used FlutterFlow with Flutter plugins? What method do you use to integrate them? Yes, we use FlutterFlow with Flutter plugins quite a bit. When integrating plugins, we use the same procedure as for typical Flutter development. Our team uses the plugin APIs directly in FlutterFlow's code editor and add dependencies to Pubspec. yaml. 

Which techniques do you use for FlutterFlow app speed optimization? We use const constructors wherever feasible, monitor widget tree efficiency, and utilize FlutterFlow's built-in performance analysis tools to find and fix performance bottlenecks and maximize performance. We also use lazy loading strategies for displays with a lot of data.

In Flutter, What are Flutter Packages And Plugins?

In Flutter and Flutter object-oriented languages, packages are collections of related classes, interfaces, and sub-packages. Packages and plugins are employed throughout development to lessen the coder's work. To save coding work, the developer may use packages and plugins rather than writing the code from scratch for everything. 

There is little difference between plugins and packages. Packages are brand-new parts of Dart code written in the language. In contrast, plugins use native code to provide additional functionality. Even though there is a little difference, the two names are sometimes used interchangeably.

What programming language is Dart? Give a thorough explanation.

Without the Dart programming language Flutter’s syntax is relatively close to that of the C language.  Dart programming language features include: 

Because Dart is declarative and programmatic, developers can and quickly comprehend and visualize the layout. 

Dart supports basic programming ideas like classes, interfaces, and functions, as well as data structure replicating collections like arrays, generics, and optional typing. 

Several times quicker than JavaScript, Dart code operates. 

Ahead-of-time (AOT) and just-in-time (JIT) compilers are used by the Dart virtual machine (VM) to improve performance and shorten code execution times. 

 Developers of Flutter: Accountability

If you want to engage a Flutter app developer for your company, this section will detail their responsibilities.

Creation of Flutter on Flutter platforms  using Flutter may create applications for a range of devices, such as: 

 Flutter While Travelling 

Developing specialized experiences for iOS and Android consumers is the duty of Flutter mobile app developers. Flutter is a fantastic choice for cross-platform mobile applications.

Futter on the Internet - You can develop fast, attractive, and highly interactive webpages and web apps using Flutter. In addition to mobile apps, developers also work on desktop applications. They use a single codebase to target several operating systems, including Windows, Mac OS, and Linux, removing the need to change the code for each OS. 

System Embedded Flutter 

It can be used to construct hardware device interfaces for mobile and online platforms. It provides strong interaction with components developed in different languages, a clean interface, and portable code. 

Conclusion

There are important differences between internal hiring and outsourcing. Naturally, many companies prefer hiring engineers in-house. However, because of the need for more technical talent in the market, the lengthy recruiting and on boarding process, and the need to manage, provide, and support engineers to assure retention, businesses usually outsource their development to near shore or offshore engineering suppliers. Hire top flutter app developer in India.

[technorizesoftwaresolutions]

Taking Flutter to the Next Level: Advanced Concepts and Patterns

Introduction:

Flutter has revolutionized cross-platform app development with its simplicity and efficiency. Its popularity stems from its rich set of features and ease of use. However, mastering Flutter goes beyond the basics. To truly excel in Flutter development, one must delve into advanced concepts and patterns. In this blog post, we'll explore how to take your Flutter skills to the next level by diving into advanced concepts and patterns. We are providing the best Flutter App development services to the customer.

1. State Management:

State management is a crucial aspect of any Flutter application, especially as the app grows in complexity. While Flutter provides built-in state management options like setState, Provider, and Riverpod, advanced state management patterns like BLoC (Business Logic Component) and Redux offer more robust solutions. BLoC separates the business logic from the UI, promoting a clean and scalable architecture. Redux, inspired by the Flux architecture, enforces a unidirectional data flow, making it easier to manage application state. Understanding these patterns and when to use them can greatly enhance the maintainability and scalability of your Flutter apps.

2. Reactive Programming:

Reactive programming is another advanced concept that can significantly improve the performance and responsiveness of Flutter apps. With libraries like RxDart and Streams, developers can implement reactive programming patterns such as observables and streams to handle asynchronous data streams effectively. This approach simplifies complex asynchronous operations and facilitates real-time data updates, making your app more dynamic and efficient.

3. Custom Widgets and Animations:

While Flutter offers a rich collection of built-in widgets and animations, creating custom widgets and animations allows developers to tailor the user experience to their specific requirements. Advanced widget composition techniques like CustomPaint and CustomClipper enable developers to create highly customized UI elements, while animation controllers and tweens provide precise control over animations. Mastering these techniques empowers developers to create visually stunning and interactive interfaces that set their apps apart from the competition.

4. Performance Optimization:

Performance is paramount in mobile app development, and Flutter provides several tools and techniques for optimizing app performance. From minimizing widget rebuilds with keys and const constructors to optimizing layout performance with LayoutBuilder and CustomMultiChildLayout, there are numerous ways to ensure smooth and responsive user experiences. Additionally, profiling tools like the Flutter Performance Monitor and Dart DevTools help identify performance bottlenecks and optimize app performance effectively.

5. Design Patterns:

Applying design patterns in Flutter development promotes code reusability, maintainability, and scalability. Patterns like Dependency Injection, Singleton, and Factory Method facilitate modular and testable codebases, while the MVVM (Model-View-ViewModel) and MVP (Model-View-Presenter) patterns separate concerns and improve code organization. By leveraging these design patterns, developers can write cleaner, more maintainable code that is easier to debug and extend.

Conclusion:

Mastering advanced concepts and patterns is essential for taking your Flutter development skills to the next level. By understanding state management patterns, embracing reactive programming, creating custom widgets and animations, optimizing app performance, and applying design patterns effectively, developers can build high-quality Flutter apps that deliver exceptional user experiences. Continuous learning and experimentation are key to staying ahead in the ever-evolving world of Flutter development. So, keep exploring, keep innovating, and unlock the full potential of Flutter!

[thetexvn]

Variables in Dart Programming

The Following are keywords used for declaring variables in Dart:

var

string

int

double

dynamic

final

const

Read more: https://www.thetexvn.com/blogs/@zia/variables-in-dart-programming-138

[ai-play]

こんにちは、Copilotです。😊

Flutterで複数人の位置情報をBing Map上に表示するサンプルコードを生成してみました。

以下のコードは、`location`と`flutter_map`というパッケージを使用しています。

`location`パッケージは、位置情報の取得や距離計算に便利です¹。

`flutter_map`パッケージは、Bing Mapを含む様々なタイルサーバーから地図を表示することができます²。

Bing Mapを使用するには、APIキーが必要です³。

APIキーは[こちら](^4^)から取得できます。

```dart

import 'package:flutter/material.dart';

import 'package:location/location.dart';

import 'package:flutter_map/flutter_map.dart';

// Bing MapのAPIキーを設定

const String apiKey = 'YOUR_API_KEY_HERE';

// 複数人の位置情報を保持するリスト

// ここでは仮に3人分の緯度経度を設定

List<LocationData> users = [

LocationData.fromMap({'latitude': 35.6833, 'longitude': 139.7667}), // 東京

LocationData.fromMap({'latitude': 34.6936, 'longitude': 135.5019}), // 大阪

LocationData.fromMap({'latitude': 43.0643, 'longitude': 141.3469}), // 札幌

];

void main() {

runApp(MyApp());

}

class MyApp extends StatelessWidget {

@override

Widget build(BuildContext context) {

return MaterialApp(

home: Scaffold(

appBar: AppBar(

title: const Text('Bing Map Sample'),

),

body: BingMap(),

),

);

}

}

class BingMap extends StatefulWidget {

@override

_BingMapState createState() => _BingMapState();

}

class _BingMapState extends State<BingMap> {

// 地図のコントローラー

MapController mapController = MapController();

// Bing MapのURLテンプレートを取得する関数

Future<String?> getBingUrlTemplate(String url) async {

// APIキーを付加してリクエストを送る

final response = await http.get(Uri.parse('$url?key=$apiKey'));

// レスポンスが成功した場合

if (response.statusCode == 200) {

// JSONデータをパースしてURLテンプレートを取り出す

final data = jsonDecode(response.body) as Map<String, dynamic>;

final resourceSets = data['resourceSets'] as List<dynamic>;

final resources = resourceSets[0]['resources'] as List<dynamic>;

final imageUrl = resources[0]['imageUrl'] as String;

// URLテンプレートを返す

return imageUrl;

} else {

// レスポンスが失敗した場合はnullを返す

return null;

}

}

// Bing Mapのタイルレイヤーを作成する関数

Widget _buildBingMap(String urlTemplate) {

return FlutterMap(

mapController: mapController,

options: MapOptions(

center: LatLng(35.6812, 139.7671), // 地図の中心を東京駅に設定

zoom: 5.0, // ズームレベルを設定

),

layers: [

// Bing Mapのタイルレイヤーを追加

TileLayerOptions(

urlTemplate: urlTemplate, // URLテンプレートを指定

subdomains: ['t0', 't1', 't2', 't3'], // サブドメインを指定

additionalOptions: {

'culture': 'ja-JP', // 文化コードを指定

},

),

// 複数人の位置情報をマーカーとして表示するレイヤーを追加

MarkerLayerOptions(

markers: users.map((user) {

// 位置情報からマーカーを作成

return Marker(

width: 80.0,

height: 80.0,

point: LatLng(user.latitude!, user.longitude!),

builder: (ctx) => const Icon(Icons.person_pin_circle),

);

}).toList(),

),

],

);

}

@override

Widget build(BuildContext context) {

// Bing MapのURLテンプレートを取得するためのFutureBuilderを使用

return FutureBuilder<String?>(

future: getBingUrlTemplate(

'http://dev.virtualearth.net/REST/V1/Imagery/Metadata/RoadOnDemand'), // 道路地図を選択

builder: (BuildContext context, AsyncSnapshot<String?> snapshot) {

if (snapshot.connectionState == ConnectionState.done) {

if (snapshot.hasData) {

// URLテンプレートが取得できた場合は地図を表示

final String urlTemplate = snapshot.data!;

return _buildBingMap(urlTemplate);

} else {

// URLテンプレートが取得できなかった場合はエラーメッセージを表示

return Center(

child: Text('Bing MapのURLテンプレートが取得できませんでした。'),

);

}

} else {

// URLテンプレートが取得中の場合はローディングを表示

return const Center(child: CircularProgressIndicator());

}

},

);

}

}

```

このコードを実行すると、以下のような画面が表示されます。

![Bing Map Sample]

このサンプルコードは参考程度にしてください。

実際に使用する場合は、エラー処理やUIの調整などを行ってください。

また、Bing Mapの利用規約にも従ってください。

¹: [【flutter(location)】位置情報の取得・距離計算 #Flutter - Qiita](^2^)

²: [Using Bing Maps - flutter_map Docs](^1^)

³: [GitHub](^3^)

⁴: https://www.bingmapsportal.com/

: https://i.imgur.com/8cY7Q0k.png

: https://www.microsoft.com/en-us/maps/product/terms

ソース: Bing との会話 2024/3/2

(1) Using Bing Maps - flutter_map Docs. https://docs.fleaflet.dev/tile-servers/using-bing-maps.

(2) 【flutter(location)】位置情報の取得・距離計算 #Flutter - Qiita. https://qiita.com/appzs/items/f6c5afbeaefd6cca7de5.

(3) GitHub. https://github.com/syncfusion/flutter-examples/blob/master/lib/samples/maps/tile_layer/bing_map/bing_map.dart.

(4) undefined. http://dev.virtualearth.net/REST/V1/Imagery/Metadata/.

(5) 【flutter(location)】位置情報の取得・距離計算 #Flutter - Qiita. https://qiita.com/appzs/items/f6c5afbeaefd6cca7de5.

(6) Using Bing Maps - flutter_map Docs. https://docs.fleaflet.dev/tile-servers/using-bing-maps.

(7) GitHub. https://github.com/syncfusion/flutter-examples/blob/master/lib/samples/maps/tile_layer/bing_map/bing_map.dart.

(8) undefined. http://dev.virtualearth.net/REST/V1/Imagery/Metadata/.

[this-week-in-rust]

This Week in Rust 530

Hello and welcome to another issue of This Week in Rust! Rust is a programming language empowering everyone to build reliable and efficient software. This is a weekly summary of its progress and community. Want something mentioned? Tag us at @ThisWeekInRust on Twitter or @ThisWeekinRust on mastodon.social, or send us a pull request. Want to get involved? We love contributions.

This Week in Rust is openly developed on GitHub and archives can be viewed at this-week-in-rust.org. If you find any errors in this week's issue, please submit a PR.

Updates from Rust Community

Project/Tooling Updates

esp-rs quarterly planning: Q1 2024

Meilisearch 1.6 - AI search & 2x faster indexing

capnproto-rust: 0.19 - ergonomic setters and faster reflection

hyper - 2023 in review

Observations/Thoughts

A universal lowering strategy for control effects in Rust

Passing nothing is surprisingly difficult

The memory remains: Permanent memory with systemd and a Rust allocator

Higlights of 2023 for cargo-semver-checks

The bane of my existence: Supporting both async and sync code in Rust

A Guide to Rust ORMs in 2024

Semantic search powered by WASM and WebGPU

Embassy on ESP: UART Echo

Rust Walkthroughs

Adventures in Binary Serialisation

Creating 2 'Simple' Allocators

Rust macros and Lambda boilerplate

Let's make an information display in rust Part 2: The Frontend

Miscellaneous

Clap - subcommands for command line applications in Rust

SurrealDB in-memory with SQL demo in Rust

Multi-counter with embedded SurrealDB database

Xilem 2024 plans

Rustaceans, say goodbye to lifetime errors: announcing nolife 0.3

Auto-generating API service using Rust, to TypeScript & Dart

From the rust community on Reddit: Rust in Aviation

[audio] Apollo - Rust in Production Podcast

[audio] Prossimo with Josh Aas

Crate of the Week

This week's crate is fish, a friendly interactive shell that used to be written in C++, but was recently rewritten in Rust (though admittedly they'll have to do some work until it hits your distro's repos).

Despite a lamentable lack of suggestions, llogiq is reasonably satisfied with his choice.

Please submit your suggestions and votes for next week!

Call for Participation; projects and speakers

CFP - Projects

Always wanted to contribute to open-source projects but did not know where to start? Every week we highlight some tasks from the Rust community for you to pick and get started!

Some of these tasks may also have mentors available, visit the task page for more information.

ZeroCopy - Use cargo-semver-checks to make sure derive feature doesn't change API surface 2

Ockam - remove_address_record function is called two times per Address during Processor shutdown

Ockam - Command - refactor to use typed interfaces to implement commands for kafka services

Ockam - Library - Validate CBOR structs according to the cddl schema for nodes/models/services

Hyperswitch - [FEATURE]: Make cache configuration configurable at runtime

Hyperswitch - [FEATURE]: Implement Code cov for local system using makefile

Hyperswitch - [FEATURE]: Setup code coverage for local tests & CI

Hyperswitch - [FEATURE]: Add domain type for client secret

Hyperswitch - [FEATURE]: Have get_required_value to use ValidationError in OptionExt

Fluvio - connector: fluvio-http-source, add an option to read data from a websocket

Fluvio - MQTT Connector: Prefix auto generated Client ID to prevent connection drops

If you are a Rust project owner and are looking for contributors, please submit tasks here.

Updates from the Rust Project

418 pull requests were merged in the last week

GNU/Hurd: unconditionally use inline stack probes

rustc_codegen_ssa: Enforce rustc::potential_query_instability lint

~const trait and projection bounds do not imply their non-const counterparts

add assume into NonZeroIntX::get

add explicit none() value variant in check-cfg

add more information to visit_projection_elem

allow ~const on associated type bounds again

avoid silencing relevant follow-up errors

check rust lints when an unknown lint is detected

coverage: add enums to accommodate other kinds of coverage mappings

coverage: simplify building the coverage graph with CoverageSuccessors

delegation implementation: step 1

disallow reference to static mut and adding static_mut_ref lint

don't ICE when noting GAT bounds in report_no_match_method_error

don't reexport atomic::ordering via rustc_data_structures, use std import

exclude well known names from showing a suggestion in check-cfg

exhaustiveness: abort on type error

exhaustiveness: track overlapping ranges precisely

exhaustiveness: use an Option instead of allocating fictitious patterns

fix ICE when suggesting dereferencing binop operands

fix all_trait* methods to return all traits available in StableMIR

fix allow_internal_unstable for (min_)specialization

fix is_global special address handling

fix unused_parens issue when cast is followed LT

fix an ICE that occurs after an error has already been reported

new flag to emit all the delayed bugs as errors (add -Zeagerly-emit-delayed-bugs)

making User<T> and User<[T]> Send

merge dead bb pruning and unreachable bb deduplication

never patterns: Check bindings wrt never patterns

pass LLVM error message back to pass wrapper

register even erroneous impls

remove -Zdont-buffer-diagnostics

stop mentioning internal lang items in no_std binary errors

store the segment name when resolution fails

suggest upgrading compiler for gated features

suggest quoting unquoted idents in attrs

support async recursive calls (as long as they have indirection)

taint _ placeholder types in trait impl method signatures

unify query canonicalization mode

remove a large amount of leb128-coded integers

varargs support for system ABI

stabilize mutex_unpoison feature

A more efficient slice comparison implementation for T: !BytewiseEq

tune the inlinability of unwrap

cargo metadata: Stabilize id format as PackageIDSpec

cargo resolver: do not panic when sorting empty summaries

cargo: add guidance on setting homepage in manifest

cargo: add unstable --output-format option to cargo rustdoc

cargo: crates-io: set Content-Type: application/json only for requests with a body payload

cargo: add rustc style errors for manifest parsing

cargo: only inherit workspace package table if the new package is a member

cargo: implementation of shallow libgit2 fetches behind an unstable flag

cargo: introduce -Zprecise-pre-release unstable flag

cargo: strip debuginfo when debuginfo is not requested

rustdoc-search: reuse individual types in function signatures

clippy: from_over_into: suggest a correct conversion to ()

clippy: useless_asref: check that the clone receiver is the parameter

clippy: correctly suggest std or core path depending if this is a no_std crate

clippy: extend useless_asref lint on map(clone)

clippy: fix false positive in PartialEq check in unconditional_recursion lint

clippy: fix suggestion for map_clone lint on types implementing Copy

clippy: make HirEqInterExpr::eq_block take comments into account while checking if two blocks are equal

rust-analyzer: add notable_trait predicate to CompletionRelevance

rust-analyzer: assist to merge nested if

rust-analyzer: acknowledge pub(crate) imports in import suggestions

rust-analyzer: differentiate between vfs config load and file changed events

rust-analyzer: fix ast::Path::segments implementation

rust-analyzer: fix incorrect parsing error on method call on range

rust-analyzer: fix nested includes resolving from the wrong base file

rust-analyzer: fix rust-analyzer-proc-macro-srv failing to spawn on windows

rust-analyzer: preserve comments for extracted block expression in 'extract_function'

rust-analyzer: remove sysroot-abi feature flag from proc-macro-test

rust-analyzer: replace SourceRootCrates hashset output with slice for deterministic order

rust-analyzer: resolve panic in generate_delegate_methods

Rust Compiler Performance Triage

This week had some small regressions that did not warrant further investigation, several of which were dismissed as being noise/blips in the data. There were also a number of gains. (Don't get exicited about that 20.6% improvement, its an measurement artifact from a temporary blip in the PR that immediately preceded this week's triage.)

Triage done by @pnkfelix. Revision range: 76101eec..f9c2421a

3 Regressions, 5 Improvements, 5 Mixed; 3 of them in rollups 55 artifact comparisons made in total

Full report here

Approved RFCs

Changes to Rust follow the Rust RFC (request for comments) process. These are the RFCs that were approved for implementation this week:

RFC: Precise Pre-release cargo update

Add RFC combining Infra and Release teams

Final Comment Period

Every week, the team announces the 'final comment period' for RFCs and key PRs which are reaching a decision. Express your opinions now.

RFCs

[disposition: merge] Avoid non-local definitions in functions

Tracking Issues & PRs

[disposition: merge] Stabilize single-field offset_of

[disposition: merge] Undeprecate lint unstable_features and make use of it in the compiler

[disposition: close] Fix non_camel_case_types for screaming single-words

Language Reference

No Language Reference RFCs entered Final Comment Period this week.

Unsafe Code Guidelines

No Unsafe Code Guideline RFCs entered Final Comment Period this week.

New and Updated RFCs

RFC: Out-of-tree test suite

Call for Testing

An important step for RFC implementation is for people to experiment with the implementation and give feedback, especially before stabilization. The following RFCs would benefit from user testing before moving forward:

No RFCs issued a call for testing this week.

If you are a feature implementer and would like your RFC to appear on the above list, add the new call-for-testing label to your RFC along with a comment providing testing instructions and/or guidance on which aspect(s) of the feature need testing.

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Rust Meetup Reloaded 2024

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Rust Meetup Bremen [1]

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Quote of the Week

Congrats to the #Rustlang and #Rust-for-#Linux community: the #LinuxKernel now contains the first useful thing built using Rust!

– Thorsten Leemhuis on FOSStodon

As with the crate of the week, this week saw a total lack of suggestions, so llogiq would like to offer you this piece of good news from the Linux side of things.

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, cdmistman, ericseppanen, extrawurst, andrewpollack, U007D, kolharsam, joelmarcey, mariannegoldin, bennyvasquez.

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust

[flutterdevs]

How to Design Custom Flutter Buttons

Flutter provides a flexible and powerful framework for designing user interfaces, including buttons. While Flutter offers a variety of built-in button widgets, you may want to create custom buttons that match your app's unique design. In this blog post, we will walk through the steps to design custom Flutter buttons.

Step 1: Define the Button Design

The first step in designing a custom Flutter button is to define its visual appearance. Consider the following aspects:

Button Shape: Decide whether you want a rectangular, circular, or any other shape for your button.

Button Size: Determine the dimensions of your button, such as width and height.

Button Colors: Choose the background color, text color, and any other colors you want to use for your button.

Button Typography: Select the font style, size, and weight for the button text.

Step 2: Create a Custom Button Widget

Once you have defined the design of your custom button, you can create a custom widget to encapsulate its functionality and appearance. Here's an example of how you can create a custom button widget: import 'package:flutter/material.dart';

class CustomButton extends StatelessWidget {

  final String text;

  final VoidCallback onPressed;

  const CustomButton({required this.text, required this.onPressed});

  @override

  Widget build(BuildContext context) {

    return ElevatedButton(

      onPressed: onPressed,

      child: Text(

        text,

        style: TextStyle(

          fontSize: 16,

          fontWeight: FontWeight.bold,

        ),

      ),

      style: ElevatedButton.styleFrom(

        primary: Colors.blue, // Set the background color of the button

        onPrimary: Colors.white, // Set the text color of the button

        shape: RoundedRectangleBorder(

          borderRadius: BorderRadius.circular(8), // Set the button shape

        ),

      ),

    );

  }

}

In this example, we create a CustomButton widget that extends the StatelessWidget class. The widget takes two required parameters: text for the button label and onPressed for the button's callback function.

Step 3: Implement the Custom Button

To use the custom button in your Flutter app, follow these steps:

Import the custom button widget into your Dart file.

Add an instance of the CustomButton widget to your app's widget tree.

Provide the necessary parameters, such as the button text and the callback function.

Here's an example of how you can implement the custom button in your app: 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('Custom Button Example'),

        ),

        body: Center(

          child: CustomButton(

            text: 'Click Me',

            onPressed: () {

              // Add your button's functionality here

              print('Button clicked!');

            },

          ),

        ),

      ),

    );

  }

}

In this example, we create a simple Flutter app with a custom button. When the button is clicked, it prints a message to the console.

Conclusion

Designing custom Flutter buttons allows you to create buttons that align with your app's unique design requirements. By following the steps outlined in this blog post, you can easily create and implement custom buttons in your Flutter app.

I hope this blog post helps you in designing custom Flutter buttons. Happy coding!

[rahat2026]

🚀 Boost Your Flutter App Development Performance! 🚀

🚀 Boost Your Flutter App Development Performance! 🚀

Are you a Flutter app developer looking to supercharge your productivity and create stunning apps with lightning-fast performance? Look no further! In this post, we'll explore some expert tips and best practices to take your Flutter app development to the next level. Let's dive in!

Effective State Management: Choose the right state management approach for your app's complexity. Flutter offers various options like Provider, BLoC, Redux, and Riverpod. Understand their nuances and select the one that suits your project best. Proper state management ensures smooth app performance and avoids unnecessary re-renders.

Optimize Widgets: Flutter's "hot-reload" feature is a game-changer, but avoid excessive use of it during development. Frequent hot-reloading can lead to inefficiencies and slower performance. Instead, focus on creating efficient, optimized widgets that minimize rendering overhead.

Async and Await with Care: When working with async operations, use async and await judiciously. Avoid nesting too many async calls, as it can lead to "callback hell." Consider using FutureBuilder or StreamBuilder to handle asynchronous operations gracefully.

Reduce Widget Rebuilds: Unnecessary widget rebuilds can significantly impact your app's performance. Leverage the power of const constructors and const widgets wherever possible. This helps in reducing widget rebuilds, making your app snappier.

Image and Asset Optimization: Images and assets can add considerable weight to your app. Optimize and compress images to reduce their size without sacrificing quality. Additionally, consider using WebP format for images, as it offers better compression and loading speed.

Code Splitting and Lazy Loading: If your app has multiple screens or complex UI elements, consider code splitting and lazy loading. This technique loads only the necessary parts of your app when needed, enhancing the initial loading time and overall performance.

Memory Management: Flutter performs well out of the box, but it's essential to keep an eye on memory consumption. Dispose of resources properly, use MemoryImage for large images, and profile your app to identify memory leaks.

Performance Profiling: Integrate performance profiling tools like Flutter DevTools or Dart Observatory into your development workflow. These tools help you identify bottlenecks and areas where your app can be optimized further.

Native Code Integration: Flutter allows you to integrate native code through platform channels. However, be cautious while doing so and avoid unnecessary bridging. Utilize Flutter's rich ecosystem of plugins and packages whenever possible.

Test and Optimize for Different Devices: Always test your app on various devices, including older models and different screen sizes. Optimize your UI to ensure smooth performance across a wide range of devices.

Caching and Offline Support: Implement caching mechanisms and offline support wherever applicable. Caching frequently used data can significantly reduce network calls, leading to faster response times and improved user experience.

Remember, achieving top-notch performance in your Flutter app is an ongoing process. Continuously update yourself with the latest advancements in the Flutter ecosystem and adapt your practices accordingly. Happy coding! 🚀😄

Need your own Flutter Mobile App? Hire me on Fiverr: https://www.fiverr.com/s/o6m278

[connectinfosofttechnologies]

Improving Your Flutter App's Performance: Tips and Tricks for Flutter Developers

Flutter Apps Development is becoming increasingly popular, and with this comes the challenge of improving the performance of Flutter apps. As a Flutter Developer, it's important to understand how to optimize your Flutter app for the best user experience possible. In this blog post, we will discuss tips and tricks for improving your Flutter App's performance, including Flutter app performance tests, startup time, and CPU usage. We'll also talk about how to identify and address performance issues in your Flutter apps. With these tips and tricks, you can take your Flutter app development to the next level!

Dart Code Optimization

As a Flutter Developer, one of the best ways to improve your app's performance is by optimizing your Dart code. Here are some tips and tricks for optimizing your code:

Minimize the use of nested loops - Nested loops can slow down your app's performance significantly. Instead, try to use Dart's higher-order functions like map, filter, and reduce.

Use const whenever possible - Using const can improve your app's startup time and reduce memory usage. So, try to use const wherever possible, especially for widgets that won't change during the app's lifecycle.

Avoid unnecessary computations - Avoid performing computations that are not necessary. Instead, cache the results of your computations wherever possible, and reuse them when needed.

Optimize your functions - Optimize your functions by making them more concise and efficient. Use named and optional parameters wherever possible to reduce the number of functions required in your code.

By following these tips, you can optimize your Dart code and significantly improve your Flutter app's performance. If you are not a Flutter Developer, Hire Flutter Apps Developer or a Flutter Dev Team to optimize your app's performance and enhance its overall user experience.

Widget Optimization

In a Flutter app, widgets are the building blocks of the user interface. They represent the visual elements of your app and contribute to the overall performance of your app. Optimizing your widgets can help improve your app's performance.

Here are some tips for optimizing your widgets:

Use Stateless Widgets - If your widget doesn't change over time, it's best to use a stateless widget instead of a stateful widget. Stateless widgets are faster to build and don't require a rebuild when data changes.

Reduce the Number of Widgets - The more widgets you have, the longer it takes for your app to render them. Try to simplify your widget tree and reduce the number of widgets your app uses.

Avoid Expensive Widgets - Some widgets are more expensive to build than others. For example, the ListView widget is more expensive than the Column widget. Try to avoid using expensive widgets as much as possible.

Use the Right Layout Widget - Choose the right layout widget for your needs. For example, if you need to display a list of items, use the ListView widget instead of the Column widget.

Rendering Optimization

Rendering is one of the most critical parts of mobile app development, and it directly impacts the user experience. Rendering optimization involves improving the performance of your app's user interface by reducing the time it takes to render and display the elements.

One of the most effective ways to optimize your app's rendering is by hiring a skilled Flutter mobile applications developer who has extensive experience working with Flutter widgets. These experts know how to optimize your app's layout, widget trees, and animations to make your app more responsive and snappy.

2nd  crucial aspect of rendering optimization is widget caching. This involves caching the expensive rendering operations and reusing them when the app loads the same widget again. This strategy can significantly improve your app's performance, particularly when you have a complex widget hierarchy with numerous child widgets.

3rd  rendering optimization technique is to minimize the number of offscreen widgets by using ListView or GridView widgets that automatically recycle widgets as they scroll out of view. This technique significantly reduces the CPU usage and speeds up the app's performance, especially when working with large lists of data.

Networking Optimization

One area that can have a significant impact on the performance of your Flutter app is networking optimization. In today's fast-paced world, users expect apps to load quickly and respond immediately, even when they are on the move or using a slow internet connection.

To ensure your app performs optimally when communicating with remote servers, you need to follow some best practices. Here are a few tips for optimizing your Flutter app's networking performance:

Use Asynchronous Programming

In Flutter, asynchronous programming is key to ensuring a smooth user experience when your app interacts with external APIs. By using async and await in your code, you can ensure that your app is not blocked while it waits for a response from a remote server.

Reduce the Number of HTTP Requests

The number of HTTP requests your app makes can have a significant impact on its performance. By reducing the number of requests, you can make your app load faster and use fewer resources.

To achieve this, you can use techniques such as caching data, lazy loading, and reducing image sizes. Another approach is to combine multiple requests into a single one using batching.

Minimize the Payload Size

The size of the data payload your app sends or receives from remote servers can affect its performance. To optimize this, you can reduce the amount of data you send by compressing data, removing unnecessary headers, and using binary data formats such as protocol buffers instead of JSON.

Optimize Connection Management

Managing network connections in your Flutter app can also impact its performance. One way to optimize this is by using HTTP connection pooling. This technique reuses existing connections to servers instead of creating a new connection for each request, reducing connection setup time.

Hire Flutter Apps Developer:

If you want to ensure that your Flutter app performs optimally in terms of networking and other performance metrics, you should consider hiring a Flutter apps developer. With their expertise and experience in developing Flutter apps, they can help you optimize your app's performance, improve user experience, and achieve your business goal.