Passing Variable from a New Activity to an Old Activity

[rolledback]

Hi, I'm attempting to pass a variable the following way.

Activity 1, user clicks on button--->Activity 2, user clicks on list item, activity 2 is closed and position of list item that was clicked is passed back to Activity 1

I've attempted to use startActivityForResult but I can't seem to get it all figured out. Here's the relevent code.

Activity 1

int density; 
 Button liquid = (Button) findViewById(R.id.chooseliquid);
        liquid.setOnClickListener(new View.OnClickListener() {			
			public void onClick(View v) {
				Intent i = new Intent(PressureCalculatorActivity.this, DensityList.class);
		        startActivityForResult(i, density);			
			}
		});

//this method declaration gives an error
public void onActivityResult(int d) {
        	density = d;         
        }

Activity 2

@Override
    protected void onListItemClick(ListView l, View v, int position, long id) 
    {    	
    	setResult(position);
    	finish();		
	}

Thanks in advance for the help.

[rolledback]

Well I figured it out on my own. Now I just need to know how to add subItems to a ListView. Ideas?