Posts

Let’s see how we can apply Joshua Bloch’s Effective Java in the Kotlin world, starting with Creating and Destroying Objects.

Kotlin Coroutines enables us to asynchronously return a single value, but how about multiple values?

In the previous article, we discussed the basics on how to Kotlin Coroutines. Now, let’s continue to the topic of structured concurrency.

Starting with the 1.3 release, Kotlin provides a nice and flexible way to do asynchronous or non-blocking programming: Coroutines.

Kotlin has provided several powerful functions in Standard.kt. Let’s go through them here quickly.

Shared preference is a built-in key-value store for primitive data types. It’s very easy to use, but there are some hidden mines that you may want to know.

We are using RxJava in Android a lot, with good reasons. However, we still need to use code that is not built with RxJava, so let’s wrap them.

It’s extremely easy to share with Intent on Android. However, there are some apps that capture the ACTION_SEND intents, but doesn’t allow the app to pre-fill text set with EXTRA_TEXT, resulting in poor user experience.

Osmosis is a command line application for processing Open Street Map data, with the souce code available here. The tool provides e.g. ability to generate and read data dumps, extract data inside a bounding box, etc. You can also easily write your own plugin to convert OSM data to e.g. formats your application understands.

Android supported Bluetooth Low Energy / Bluetooth Smart since 4.3 / API level 18. However, it’s not nice, in many ways.