Nothing displayed on TextView after subtracting two times (hh:mm:ss)

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http://stackoverflow.com – I am developing an Android app. I am setting a difference of 2 dates to a TextView. It doesn't display anything. Somewhere, it isn't getting to the TextView. I would love if you could tell me where I'm going wrong. My code is below. TestStation.java public class TestStation extends Activity { String URL = "http://lapi.transitchicago.com/api/1.0/ttarrivals.aspx?key=201412abc85d49b2b83f907f9e329eaa&mapid=40380"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.test_station); StrictMode.ThreadPolic (HowTos)