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So, before Android 4.3 came out and ruined my pre-holiday week and schedule, this is what I was working on. It's now less finished than I had hoped it would be before I leave, but it's already quite usable.

About the app

GeoLog is a new kind of location tracker which changes tracking characteristics based on where you are and what you are doing.

On foot, you travel slower than by car, and you may not want to gather location data as often. If you're standing still, why track location at all - it's just a waste of power. If you're on a photo walk, you might only want to track location while walking, and not when doing anything else - like driving to the where the walk starts. When in a long trip, you may wish to use a less accurate low power tracking solution, while on a short trip you may prefer tracking as precisely as possible. This is all profile-based and highly configurable.

Based on Google's new fused location provider, it can determine when you are standing still, walking, cycling, or in a moving vehicle, and adjust tracking parameters accordingly. It will automatically switch between all methods of gathering location data (sensors, cell and Wi-Fi networks, GPS, etc) to give you the best location fix possible, within the parameters you set up.

The app currently supports exporting to GPX and KML formats, and has an extensive selection of export filters. GPX export files are tested against Lightroom, where KML export files are tested against Google Earth.

Apha / Experiment

This is an alpha release. It is already usable, but it's not yet feature complete. It has also not undergone rigorous testing on various Android versions yet, so expect issues. Reference/development device was an SGS3 running 4.2.

Furthermore, this whole thing is an experiment. I'm not sure how well this will work in reality. I have built it to track my whereabouts on a long trip far away, and I hope it will be fit for that purpose. By the time you are reading this, I will probably be on that trip, and experiencing first hand if it's a success or not. I would have liked to make it more complete before leaving, but I have ran out of time, and maybe it can be useful to you before I'm back. It works well enough around the neighborhood, but it's questionable how well that translates to jungle hikes in the middle of nowhere. 

As such, all features are currently available and free, but depending on how well this works, a future release may transition to an in-app purchase model, where some (even currently existing) features may require a purchase. We'll see how all this works out, I just want you to know that that is an option.

You will also probably need to adjust the profile presets to your personal preferences. Ultimately, I would like this to be good enough to just leave on 100% of the time!

Discussion

XDA thread is here: http://forum.xda-developers.com/showthread.php?t=2386317