title: How to set map size on Android using LibGdx
body: <p>I'm working on a simple game and I have problem with setting the map size. I am using <code>OrthographicCamera</code>. I want the map to be visible. How should I set the proper size of viewport <code>new OrthographicCamera(viewport_width, viewport_height)</code>?
  Currently I'm passing some value and when I'm drawing elements on the map I don't see them because they are out of bound, if I make the width and height enormous I can see them. I want to have the whole map visible and draw everything on the sight of the user. I'm not sure where I'm making a mistake</p>