General :: How To Open Different Screen / When Press Different Button On Same Page

Ok so today i started my first Android Application in eclipse. how to open a new screen when i press a button, but my question is, how do i open a different screen when i press a different button on the same page? Because you cant just copy and paste the same code for the first button because it gives you duplicate errors.what i can copy/paste or do to get my second button to go to a different screen?

main.class (or java)
Code:
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
[code]....

I am trying to hook button2 in main.xml so that when clicked, it takes me to the animals.xml page.