The Android OS specifically calls out for at least three hardware navigation buttons: home, back, and menu (some also include a search button).
Like the Apple iPad, the Maylong M-150 included only one button on its face, relegating the other controls to touch-screen buttons. And though the Maylong's one button looks like a Home button, it actually behaves like a back button. It's bizarre and frustrating, and it does a disservice to the Android OS.
The lesson here: Android devices need the Android three-button hardware scheme to work properly. Also, test the buttons to make sure they behave as you'd expect.