A -> B -> C -> D-> C

Intent i = new Intent(new Intent(C.this, D.class);
 startActivityForResult(i, 0);

Intent i = new Intent();
 i.putExtra();  // insert your extras here
 setResult(0, i);

protected void onActivityResult(int requestCode, int resultCode,
         Intent data) {
     if (requestCode == PICK_CONTACT_REQUEST) {
         if (resultCode == RESULT_OK) {
             // A contact was picked.  Here we will just display it
             // to the user.
             startActivity(new Intent(Intent.ACTION_VIEW, data));

             /*
                can also get the extra sent back through data
                using data.getStringExtra("someKey");
                assuming the extra was a String
             */

         }