I have set up my Tiled Map likes so:
level = new Level("level_1.tmx");
renderer = new OrthogonalTiledMapRenderer(level.getMap(), UNIT_SCALE);
spriteBatch = renderer.getBatch();
debugRenderer = new ShapeRenderer();
camera = new OrthographicCamera();
camera.setToOrtho(false, 18, 10); //View is 18 by 10 tiles
camera.update();
However, since the number of tiles is hardcoded in, the screen will accordingly stretch with different screen sizes.
How do I customize the screen width so that it has the proper ratio and will properly scale to fill the screen with LibGDX and Android?