Android Tab spacing/padding options

EDIT: OP solved the problem by doing this:

for (int i = 0; i < mTabHost.getTabWidget().getChildCount(); i++) 
    { 
    mTabHost.getTabWidget().getChildAt(i).setPadding(40,0,40,0); 
    }

By the way tab is depricated in newer versions. You may consider learning Fragments.