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Tomek Polański

Bang! Operator and how to improve your Dart Nullability

Dart promised Sound null-safety to prevent us from committing the Billion Dollar Mistake. Unfortunately, neither Flutter nor our code is…

Nov 7, 2021

Bang! Operator and how to improve your Dart Nullability

Nov 7, 2021

The New Flutter Integration Tests — Are They any Good?

The current Flutter Driver tests will be deprecated and it’s recommended to move to the new Integration Tests.

Apr 5, 2021

Apr 5, 2021

Running Flutter Desktop on Stable channel

TL;DR: Follow those steps if you want to run Flutter as a desktop application on beta or stable channels (and not only on master or dev)

Oct 26, 2020

Running Flutter Desktop on Stable channel

Oct 26, 2020

Published in
Flutter Community

Blazing Fast Driver Tests - made easy

A note of warning: if you are in a Flutter project that won’t take more than 3 months, you won’t need an extensive testing approach…

Feb 5, 2020

Blazing Fast Driver Tests - made easy

Feb 5, 2020

Published in
Flutter Community

How Slivers are made: SliverFillRemaining

SliverFillRemaining is fairly simple yet useful — it fills the remaining scrollable space with a widget of your choice.

Dec 31, 2019

How Slivers are made: SliverFillRemaining

Dec 31, 2019

Published in
Flutter Community

How Slivers are made — Part 1

The best way to learn how to write your own Sliver is to know how existing Slivers are made.

Nov 24, 2019

How Slivers are made — Part 1

Nov 24, 2019

Published in
Flutter Community

Blazingly Fast Flutter Driver Tests

TL;DR: Ever wanted to speed up you Flutter Driver Tests by 750%?

Nov 13, 2019

Blazingly Fast Flutter Driver Tests

Nov 13, 2019

Published in
Flutter Community

Flutter Animations Cheat Sheet

Since writing Flutter Layout Cheat Sheet article, I intended to create a similar article about Flutter’s animations. Unfortunately using…

Jul 26, 2019

Flutter Animations Cheat Sheet

Jul 26, 2019

Published in
Flutter Community

Flutter Laggy Animations: How Not To setState

Creating animations in Flutter is really fun and easy, but there is one bad practice that might make those animations laggy: setState.

Mar 26, 2019

Flutter Laggy Animations: How Not To setState

Mar 26, 2019

Published in
Flutter Community

Elements, Keys and Flutter’s performance

TL;DR: Widget Keys can improve the performance of our application in places where you do not get the promised 60 FPS.

Feb 9, 2019

Elements, Keys and Flutter’s performance

Feb 9, 2019

Published in
Flutter Community

Do you see the difference? — Flutter Golden Files

TL;DR Flutter provides a reliable and easy way to test custom widgets and painters using snapshot/golden files testing.

Dec 7, 2018

Do you see the difference? — Flutter Golden Files

Dec 7, 2018

Flutter Integration — Part Two: Flutter Attach

In the previous post, I’ve introduced a way to add Flutter to your existing project using git submodules — the reason why we’ve used this…

Sep 27, 2018

Flutter Integration — Part Two: Flutter Attach

Sep 27, 2018

Integrating Flutter into an Existing App — Part One: Flutter with Submodules

You might be one of the people interested in using Flutter in your daily job, but unfortunately, you cannot use it as you already have a…

Sep 11, 2018

Integrating Flutter into an Existing App — Part One: Flutter with Submodules

Sep 11, 2018

Published in
Flutter Community

Flutter Layout Cheat Sheet

Do you need simple layout samples for Flutter? I present you my set of Flutter layout code snippets. I will keep it short, sweet and simple…

May 2, 2018

Flutter Layout Cheat Sheet

May 2, 2018

Published in
ProAndroidDev

Testing Time with Espresso and RxJava

Espresso is a white-box testing framework that comes with pros and cons. The downside is that the person writing the tests needs to know…

Feb 12, 2018

Testing Time with Espresso and RxJava

Feb 12, 2018

Published in
ProAndroidDev

Testing @Parcelize

@Parcelize annotation from Kotlin Android Extensions saves us boilerplate code — we developers know that “less code means less bugs, no…

Jan 9, 2018

Testing @Parcelize

Jan 9, 2018

Published in
ProAndroidDev

Briefly about RxJava Logging

TL;DR — Tired of writing code to log the behavior of your Observables, Flowables, …? Don’t want to use an entire library? Check out those…

Dec 16, 2017

Briefly about RxJava Logging

Dec 16, 2017

Published in
ProAndroidDev

Sequences — a Pragmatic Approach

Sequences are a great tool that has a bit of a different approach to handling collections of data than Android developers are accustomed…

Aug 21, 2017

Sequences — a Pragmatic Approach

Aug 21, 2017

Declarative Kotlin: Lists, Sequences and RxJava

Once you discover map, filter, flatMap and so on, it is really hard to go back to using loops.

Aug 5, 2017

Declarative Kotlin: Lists, Sequences and RxJava

Aug 5, 2017

Mobile and Web Working Together

Mobile and web apps are both client-facing technologies, but when I tried to research what they have in common, I noticed that they are…

Jul 17, 2017

Mobile and Web Working Together

Jul 17, 2017

Tomek Polański

Tomek Polański

Passionate mobile developer. One thing I like more than learning new things: sharing them

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