Tagged in Tech

Tech - August 28, 2020

Developing Android libraries that are easy to use - Part 3: How to do it technically

This is Part 3 of the series Developing Android libraries that are easy to use. You might want to start by reading Part 1 and Part 2. With this post, I am going to get to the point and state dos and don’ts on how to actually write the source code. 1. Changes in public APIs The APIs available

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Tech - August 23, 2020

Developing Android libraries that are easy to use - Part 2: Common mistakes to avoid

This is Part 2 of the series Developing Android libraries that are easy to use. You might want to start by reading Part 1. This post is basically the inverse of the previous post. Here we discuss what not to do / what to avoid. 1. Documentation location The following are the don’ts for documentation location: Don’t

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Tech - August 14, 2020

Developing Android libraries that are easy to use - Part 1: Make the library conventional

We more often than not re-use code when developing software. For code to be reused when working in Java, we can package it into classes, packages, modules (read gradle-modules), or an artifact. In Java, we call these artifacts JARs while in Android they become a bit more complicated and independent to become AARs. AARs contain drawables, strings, layouts, values, assets and even the AndroidManifest.xml. However, to truly re-use the code

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Tech - July 27, 2020

Setting Up a Multi-Container Development Environment with Docker

In this post we will set up a development environment for an application that will be using multiple Docker containers.

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Tech - March 02, 2020

SSH and Password Managers

The ssh program on Linux allows you to specify a program or script from where it should get a passphrase when it needs one. This allows you to, for instance, hookup it up to your password manager to feed it the passphrase. You can do this by specifying the path to the program to execute

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Tech - January 30, 2020

Using FHIR with Google Cloud, BigQuery, and the AI Platform

From our XLSForm definitions in Ona Data to our JSON Forms in OpenSRP, the work we do at Ona is built upon community driven standards. As we further integrate HL7 FHIR (Fast Health Interoperability Resources) into OpenSRP, we’ve been exploring the existing tooling available. In this post we’ll dive into the Google Cloud Platform (GCP)

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Tech - January 25, 2020

Clojure & JavaScript Higher-order Functions

It was not easy for me to learn JavaScript. And when it came to learning higher-order functions, I had to take a break — literally get up and take a walk around the block — because I couldn’t seem to understand it. But through my pain, I’ve put together a short guide that hopefully makes it clearer

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Tech - December 19, 2019

Plotting Real-Time Locations with Mapbox

In this post we will leverage Mapbox’s real time live data plotting abilities to track the International Space Station (ISS) location on a map in real time. Real-time mapping and geolocation tracking is a core feature for web and mobile applications across many industries. In simpler words, this feature detects and streams location data to

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Tech - September 17, 2019

Terraform 101

Terraform is a product from Hashicorp. It is a tool for building, changing, and versioning infrastructure safely and efficiently. Written in Go, Terraform creates a plan for how it will build your infrastructure and then executes it. Recently, we held our first master class in Terraform, courtesy of our Director of Engineering and SRE team. It

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Tech - May 16, 2019

A Surprisingly Complex Task

by Rodgers My first week at Ona I was assigned a GitHub issue labeled high priority. The GitHub issue was created about 3 weeks before I joined. My task was to upgrade the HTTP library that was being used in the OpenSRP Android client. OpenSRP was using DefaultHttpClient and it was not working for Android version 5.0

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