TabWidget tw = tabHost.getTabWidget();
for (int i = 0; i < tw.getChildCount(); i++)
{    
TextView tv=(TextView)tw.getChildAt(i).findViewById(android.R.id.title);    
ImageView iv=(ImageView)tw.getChildAt(i).findViewById(android.R.id.icon);    
iv.setPadding(0, -8, 0, 0);    
tv.setPadding(0, 0, 0, -2);    
tv.setTextSize(12); }