It is a certain Josh Max managed to get Android 1.6 to porting it to a Texas Instruments TI Nspire CX calculator. The work with Josh to the operating system to get it up on the calculator and even a game to play: Lunar Lander.
That leaves the rekenmachinefanaat see in a video on YouTube. From various comments on Twitter from @Joshumax turns out that he use of Android 1.6 Donut, because this is the last version of Android is still capable of dealing with the limited specifications of the handheld, namely a 3.5″screen with a resolution of 320×240 pixels, only 64MB of ram and 100MB of storage. The 150MHz ARM processor seems just enough to make the whole run.
It is Josh in any case, managed to get Android to send via the keyboard of the calculator. He can even make the game, Lunar Lander.