@chooyan-eng
About
I am a freelance mobile app developer, mainly working on Flutter. I'm also developing a Flutter package named "crop_your_image", which enables Flutter app developers to build cropping images functionality in their app with their own designed UI. https://pub.dev/packages/crop_your_image
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Tsuyoshi Chujo's blogs
Recently published
All I Know About WidgetsApp
Jun 27, 2025 · 13 min read · According to the FAQ page of the Flutter doc, the key concept of Flutter in the design field is to make brand-driven designed apps without dependency on platform-specific design languages, such as material design, liquid glass, etc. https://docs.flut...
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All I Know About AnimationController
Mar 23, 2025 · 12 min read · The basic idea of Flutter's "explicit animation" is so simple: rebuild with updated value. Imagine if a Container has its size of width: 50, height: 50, it renders a square box with the size of 50. Once we rebuild the widget with passing another valu...
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Make Your build() Clean with StateHolder
Jan 31, 2025 · 6 min read · If we take a closer look at build() method, we sometimes find it "messy", messy with calculation logics to create values even though we may want to focus on the structure of the widget tree and sometimes on the dependency graph. Even though we may wa...
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All I Know about State Management
Jan 17, 2025 · 12 min read · Flutter constructs UI declaratively. Each widget can't be changed individually after rendered, so we have to rebuild the entire widget tree if we want to change even a single Text, though we don’t worry about the performance as the Flutter framework ...
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