title: Swipe in viewpager and EditText validation
body: <p>I am developing an app where the user can type in stuff in edittexts and get to the next view by swiping the screen. The swiping-stuff is handled by a viewpager.</p>
  
  <p><strong>What I want to do is the following:</strong> </p>
  
  <p>The user should only be able to swipe when all edittexts are filled. Currently all my edittexts have an TextWatcher whichs sets a boolean value to "true" once every field is filled. When it is true, I can enable the viewpager, when it isn't, I can disable it.</p>
  
  <p>What is missing is that the user doesn't get feedback if a field is empty, the view simply doesn't swipe, but the user might not know why. What I need is to show a textmessage if he tries to swipe the page, stating that at least one edittext is still empty.</p>
  
  <p>I thought about adding the viewpager to a gesture detector - would that be a good idea? If yes, how would I implement that the best way possible?</p>