title: why Flutter App doesn't work on real device
body: <p>I have been working on an app which has been working fine on the emulator. Today I tried to export my app and install the app on an Android device. At first the app seemed to be fine. The homepage works correctly and the four buttons (RawMaterialButton) on the homepage also work. When I press one of the buttons it redirects to a different page which also contains a button (floatactionbutton). But this button unfortunately doesn't do anything. I don't understand why, on the emulator everything is fine but on a real Android device it doesn't work!</p>
  <p>I tried replacing the button on the second page with the (working) button from the homepage. Also without result!</p>
  <p>I hope someone can help me out!</p>