Tom Colvin – Medium

Tom Colvin
in
ProAndroidDev

Seven recipes to understand flows and asynchrony in Kotlin

In the clean world of Kotlin coroutines, we can have many tasks running at different times. Suspend functions and flows are two examples...

8 min readMar 14, 2024

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Seven recipes to understand flows and asynchrony in Kotlin

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Tom Colvin
in
ProAndroidDev

Seven demos to understand coroutines: scope, context and Jobs

Understanding coroutines — really understanding them, not just learning patterns — comes from seeing what goes on under the hood.

6 min readFeb 19, 2024

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A box being handed over

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Tom Colvin
in
ProAndroidDev

Coroutine patterns in Android, and why they work

I know many Android developers who learn coroutines through code patterns, and that is usually enough to get by. But doing so misses the…

6 min readJan 21, 2024

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An org chart

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Tom Colvin
in
ProAndroidDev

Android, Bluetooth and BLE the modern way: a complete guide

Bluetooth is an immensely fun technology to work with. Once you learn how to search for and communicate with devices, you will be surprised…

11 min readJan 10, 2024

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People sending files and documents via Bluetooth on mobile devices

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Tom Colvin
in
ProAndroidDev

A flexible, modern Android app architecture: complete step-by-step

Here we teach Android architecture by example. That means showing how various architecture decisions are made. We will encounter…

18 min readJul 4, 2023

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A flexible, modern Android app architecture: complete step-by-step

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Tom Colvin
in
ProAndroidDev

How to architect Android apps: a deep dive into principles, not rules

Here’s a scenario that’s recognisable to most Android developers… You are tasked with adding a simple feature to an app, but doing so…

13 min readMay 25, 2023

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Workers architecting a building

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Tom Colvin
in
Better Programming

Firebase’s Password Reset is Insecure. Here’s How to Fix It.

Firebase Auth’s default password reset app is insecure, as it allows users to enter insecure passwords. My project provides a drop-in…

6 min readApr 3, 2023

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Firebase’s Password Reset is Insecure. Here’s How to Fix It.

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Tom Colvin

Why Firebase email/password login isn’t great for security

In my previous security breakdown of Firebase Auth, I noted six separate security problems, and the first on the list was its insecure…

5 min readMar 20, 2023

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Why Firebase email/password login isn’t great for security

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Tom Colvin
in
ProAndroidDev

Using Jetpack Credential Manager to save and retrieve passwords in-app

Saving user credentials has traditionally been a bit hit-and-miss in Android, but a new library released earlier this month looks promising

5 min readFeb 23, 2023

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Using Jetpack Credential Manager to save and retrieve passwords in-app

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Tom Colvin

Android 14 finally fixes this decade-old security hole

Android has a security weakness that we’ve known about for years. Since, in fact, its very early versions. It’s taken until this year’s…

4 min readFeb 10, 2023

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Android 14 finally fixes this decade-old security hole

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Tom Colvin

Tom Colvin

Google Developer Expert in Android and CTO of Apptaura, the app development specialists. Available on consultancy basis. All articles 100% me, no AI.

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