Category: Android
Understanding Kotlin’s Higher-Order Functions: map, reduce, and fold
In Kotlin programming, higher-order functions such as map, reduce, and fold offer powerful tools for data manipulation and aggregation. These functions operate on collections, enabling concise and exp... Read More
Android OpenTopoMap Viewer: New Features and Google Play Release
We’ve finally released the OpenTopoMap Viewer app on Google Play. This version is ad-supported. Of course the ad-free FOSS version will continue to be maintained on F-Droid. New features include... Read More
Geotagging Time Lapse Images with Mapillary Tools
Introduction In a previous post we have discussed how to tag MOV video files with Mapillary Tools. To save storage space, or to obtain better picture quality, you may want to use time lapse photos ins... Read More
Geotagging a MOV File with Mapillary Tools
Introduction We can use a Mapillary Tools to extract image stills from video files for upload to Mapillary. Our action cam does not have GPS, so we need to ‘geotag’ the images with a synch... Read More
Android GPX Player
GPX Player is a tool for Android developers that you can use to play GPX tracks on your desktop computer to mock track points on an Android device. Record a GPX or create it with your favorite GIS too... Read More
Send a Parcelable to another App on Android
To send a parcelable to another application for it to be deserialized it is essential that: the class definitions of the class to be serialized are identical in both apps, the packages of the classes ... Read More
OpenTopoMap Viewer for Android
OpenTopoMap renders topographic maps from OSM and SRTM data. The style is based on German government maps, with a focus on landmarks and contrasting map colors. This new FOSS Android viewer uses osmdr... Read More
Consuming REST on Android with Retrofit, ViewModel and LiveData
Introduction The first functionality we want to implement in the Ersa Android client is some basic dashboarding. We’ll display the latest temperature and humidity readings by origin (sensor node... Read More
Android Gauge View
With all these Raspberry Pi and Arduino projects in mind I am developing this gauge view for IoT apps on Android. There are some alternatives around, but I’m not quite satisfied with them as the... Read More
Classic Frogger with libGDX
Roger Engelbert’s excellent tutorial on building a classic Frogger clone with libGDX appears to have gone offline. A couple of months ago I based my own clone on this. It definitely needed some ... Read More