you can download the free SDK after an email registration and self compile the source code
http://developer.flir.com/getting-started/
I posted some source code modifications in this thread:
https://www.eevblog.com/forum/thermal-imaging/question-about-flir-one-for-android/msg803915/#msg803915
https://www.eevblog.com/forum/thermal-imaging/question-about-flir-one-for-android/msg820345/#msg820345
I hope you will be able to fix these bugs for me, and then post the re-compiled APK file for download (not just link to the fixed source code), as I don't even know how to program for Android. You'll need more than the FLIR One SDK. You'll also need the Android SDK (also called ADK) from Google, and the Android SDK requires Java SDK (also called JDK). I actually uninstalled ADK and JDK from my harddrive a few months ago, after trying and failing to figure out how to even use ADK. The graphical interface of ADK itself is NOT AT ALL user friendly. It was a pain in the neck just to figure out how to add a button to the interface. It was a pain in the neck just figuring out where the "compile" button was to actually compile the program. I NEVER could figure out how to get it to compile in "release" mode, so I had to compile in "debug" mode in order to generate the APK file. And at the end of the day, I still just had an app that had a button that I could push, that did NOTHING. I don't think I'm ever going to try to program for Android again. It's just too hard.
I know very little when it comes to programming in pure Java. I know even LESS when it comes to programming for Android. And I suspect I will need to become a MASTER Java programmer before I even TOUCH Android programming. Obviously 2 MAJOR obstacles that must be overcome, before I even THINK about trying to write programs for the FLIR One device.
Fortunately you seem to have already mastered all of the needed skills, as you were able to successfully compile the FLIR One SDK sample app originally (with all the bugs in tact), and also seem to have modified the source at one point (but not recompiled the modified version). This is why I'm coming to you, and asking you to fix the bugs in that app, and post a download link to the APK for the fixed version of the app.