ThreadActivityUnderHood.java

public class ThreadActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //....
        new DownloadTask(this).start();
    }
    
    private class DownloadTask extends Thread {
        
        private final ThreadActivity threadActivity;
        
        public DownloadTask(ThreadActivity threadActivity) {
            this.threadActivity = threadActivity;
        }

        @Override
        public void run() {
            SystemClock.sleep(2000 * 10);
        }
    }
}