About Resolution x Android x Desktop x Not show Black Empty spaces ( Tiles)

Heya Guys!

I have some questions concerning resolutions.
Im using libgdx.
Im using Tiled.

Anyway, i have several questions about developing for android/desktop.

Right now, im using a resolution of 800x600.

First,
If i maximize the screen, black parts of the screen will show up, because theres no tiles there.So i was wondering… How can i maximize the screen and only make the tiles bigger instead of showing more ? Get it?

Two, whats the default/correct resolution to atend to those two ? Desktop/android

Three, Whats the max Heap memory of JVM should i be using? I did some profile in Netbeans and it showed the max of 40mb i think.Can i post the profile here so someone can give me some tips?

I think thats it! I will thank so much for whoever can help me with this! its my first big project and well, the framework is all ready, all i need now is some tips :stuck_out_tongue: YAY!!!

Thanks Dermet Fan :stuck_out_tongue: aka Robin