Medium

Tom Colvin

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Tom Colvin

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May 12, 2025

Implementing Passkeys in Android — A Full-Stack Guide

The internet would be a much more secure place for its users if passkeys replaced passwords. They are phishing-proof, guess-proof and…

Implementing Passkeys in Android — A Full-Stack Guide

Tom Colvin

·

Feb 4, 2025

5 steps to an effective app MVP: Validate your app idea without spending a fortune

The rules I’ve built up over 11 years of working with app businesses, to quickly identify whether an app idea is a goer or not.

5 steps to an effective app MVP: Validate your app idea without spending a fortune

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ProAndroidDev

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Tom Colvin

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Dec 19, 2024

AI Vision on Android: CameraX ImageAnalysis + MediaPipe + Compose

Last week we looked at the basics of the CameraX library. That laid the foundations for something really exciting … AI vision! Now we can…

Illustration of a brain in a circuit board pattern

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ProAndroidDev

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Tom Colvin

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Dec 11, 2024

Let’s build an Android camera app! CameraX + Compose

Writing customised camera experiences on Android has traditionally been very difficult. For one thing, photography itself is difficult: as…

Flow chart showing how the PreviewView is passed to the Preview’s setSurfaceProvider, to create a working preview

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ProAndroidDev

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Tom Colvin

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Mar 14, 2024

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...

Seven recipes to understand flows and asynchrony in Kotlin

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ProAndroidDev

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Tom Colvin

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Feb 19, 2024

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.

A box being handed over

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ProAndroidDev

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Tom Colvin

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Jan 21, 2024

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…

An org chart

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ProAndroidDev

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Tom Colvin

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Jan 10, 2024

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…

People sending files and documents via Bluetooth on mobile devices

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ProAndroidDev

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Tom Colvin

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Jul 4, 2023

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…

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

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ProAndroidDev

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Tom Colvin

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May 25, 2023

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…

Workers architecting a building

Tom Colvin

Tom Colvin

Android developer / consultant; freelancer or through my agency Apptaura. Google Developer Expert in Android. tomcolvin.co.uk Articles 100% me, no AI.

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