Programmatically updating the Menu Item drawable icon

If there is a requirement that different drawable icon has to be shown on different activities, then it can be achieved by using the following line of codes -

@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);

MenuItem item = menu.findItem(R.id.menuItem);
item.setIcon(R.drawable.ic_drawer);

return super.onCreateOptionsMenu(menu);
}

where R.menu.main is the layout used for the Menu inside the "Menu" Folder in "res" folder,

R.id.menuItem is the identifier of the particular menu item inside R.menu.main layout file.