title: Disable zoom function in tablet
body: <p>Now I have created an apps in tablet which fit the screen size but there are button at the right bottom corner which can choose either stretch to fill screen or zoom to fill screen. I want to disable the function either hide that button or won't change anything after pressing anything</p>
  
  <p>I have tried to trigger the keyevent of that button but there is no related keycode.</p>
  
  <p>anyone can help?</p>