Flutter

This is a journal about creating applications with Flutter. I'll share about how to use Dart and how to make the app with Flutter.

[Flutter] The split('') Trap — Android Crash from Emoji and Some CJK Characters

2026-05-27
A summary of the cause and fix for the "string is not well-formed UTF-16" Android crash that occurs when splitting a word containing certain CJK characters or emoji character by character.
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[Flutter] Fixing AppBar / System Control Overlap in iPad Multitasking

2026-05-26
A walkthrough of the bug where the AppBar back button overlaps with the system grab handle in iPad Split View / Slide Over / Stage Manager. Covers why screen-size based iPad detection fails, the hardware-based alternative, and the subtle AppBar leading alignment pitfall.
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[Flutter] Galaxy S26 Support — Android 16KB Page Size Compatibility

2026-05-25
Learn how to align AAB artifacts so that Flutter apps are properly listed on the Play Store for Galaxy S26 and other devices using 16KB memory page sizes, and how to build a static verification gate to prevent regressions.
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[Flutter] Practical E2E Test Environment Setup Guide

2026-04-11
Learn how to set up an integration_test-based E2E test environment in a Flutter project and apply it to a real app using Firebase/GetX/SQLite.
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[Flutter] App accessibility

2025-01-03
Let's find out how to improve the accessibility of apps developed with Flutter.
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[Flutter] How to use PageView widget

2024-10-11
Let's see how to use the PageView widget provided by Flutter to scroll the entire page.
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[Flutter] Test Matcher

2024-10-06
Let's see the Matchers available in Flutter test code and how to use them.
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[Flutter] Use MultipartRequest in http package to upload files

2024-09-17
Let's see how to upload files using MultipartRequest in the http package in Flutter and how to test it.
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[Flutter] How to use BackButton widget

2024-08-01
Let's see how to use the BackButton widget provided by Flutter to go back the previous screen.
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[Flutter] Fix Lexical or Preprocessor Issue (Xcode): *.h file not found error

2024-01-27
Let's see how to fix the flutter Lexical or Preprocessor Issue (Xcode): *.h file not found error that suddenly occurs in Flutter.
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[Flutter] Improve test execution speed with concurrency option

2024-01-26
Let's see how to improve test execution speed with concurrency option when running test code in Flutter.
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[Flutter] Fix broken Korean or Japanese in server data

2023-03-05
Let's see how to fix the broken Korean or Japanese when getting the JSON data from the server via the http package in Flutter.
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