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How to use syncfusion_flutter_signaturepad | SfSignaturePad
Signature is converted to a png, then Base64 encoded. It’s prefixed with “data:image/png;base64,” as required by your API. Uses Get.snackbar to show error messages. Replace fakeVerifyViaSignatureAPI() with your actual API call.
How to Use Base64 Encoding in Flutter (With Practical Example)
Base64 in Flutter Base64 is a method to convert binary data (like images or files) into a text string, making it easy to send via APIs, store in databases, or embed into JSON. Example Use Case: Convert Image to Base64 in Flutter Let’s walk through a real-world example where you: Using Base64 in Flutter is…
Mastering Null-aware Operators in Dart: A Complete Guide
Null Handling in Flutter In Dart, handling null values can be tricky. Fortunately, Dart provides some elegant ways to manage null values without overwhelming your codebase. In this article, we’ll dive deep into Null-aware operators (?, ??, and !), explaining what they are and how to use them effectively to make your code cleaner, safer,…
How to Detect Memory Leaks in Flutter?
Detect Memory Leaks in Flutter Use Flutter DevTools Profile Heap with Observatory (dart:developer) Use leak_tracker Package Memory leaks in Flutter mostly happen due to improper disposal of objects, keeping unnecessary references, and misusing widgets like StreamBuilder, FutureBuilder, and AnimationController. Always dispose resources properly, avoid static stateful objects, optimize image loading, and monitor memory usage using…
How to handle Memory Leaks in Flutter ? | Memory Leaks in Flutter
Solution for Memory Leaks in Flutter Memory leaks in Flutter can occur when objects are retained in memory even when they are no longer needed, leading to excessive memory usage and potential app crashes. Dispose Controllers and Listeners Properly When using controllers like TextEditingController, AnimationController, StreamController, and event listeners, ensure they are disposed of in…
Flutter interview questions | Top 50 Flutter interview questions | Popular Flutter questions
Differences FFI vs WorkManager Feature FFI (Foreign Function Interface) WorkManager Platform Works on Android, iOS, Windows, macOS, Linux Android Only Purpose Calls native C/C++ code Runs background tasks Use Case High-performance operations (e.g., image processing) Background tasks (e.g., data sync, scheduling jobs) Execution Runs synchronously Runs asynchronously in background Dependencies Requires native C/C++ library Uses…
Widget Tree vs Element Tree vs Render Tree
Flutter Widget Tree vs. Element Tree vs. Render Tree: Understanding Their Role & Relationship Imagine You’re Building a House Real Flutter Example: Button UI Update Imagine you have a simple Flutter app with a button that changes the text when pressed. Code Example: How Flutter Uses the Three Trees Step 1: Widget Tree (Blueprint 📜)…
Injectable Package in Dart for Dependency Injection | Dependency Injection in flutter
The injectable package in Dart is used for Dependency Injection (DI). It helps automatically generate and manage dependencies, making code cleaner, modular, and testable. What is Dependency Injection (DI)? Dependency Injection is a design pattern where a class gets its dependencies from an external source instead of creating them itself. For example, instead of doing…
Understanding Abstract Classes in Dart: Benefits, Memory Usage, and Flexibility | Full concept about abstract class
Important point : Abstract classes are not “empty”: Acts as a base class: NEED OF ABSTRACT CLASS IN DART ✅ Avoiding Code Duplication ✅ Polymorphism (Flexible Code) ✅ Enforcing a Common Structure ✅ When multiple classes share common behavior.✅ When you want to enforce a contract (certain methods must be implemented).✅ When you want to…
FLTFirebaseMessagingPlugin.h:12:9 Include of non-modular header inside framework module
FLTFirebaseMessagingPlugin.h:12:9 Include of non-modular header inside framework module To resolve this issue please read below article in which all steps are mentioned to resolved this issue: