To Fix a Very Little Java (Android Studio) Code

So............. I have the disaster of a code you'll find next. It's from Android Studio, and it is the following. ----------------------------------------------------------------------------------------- package [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; public class MainActivity extends AppCompatActivity { private TextView T1; private Button B1; @Override public void onCreate(Bundle savedInstanceState) { [login to view URL] (savedInstanceState); setContentView (R.layout.activity_main); T1 = (TextView) findViewById ([login to view URL]); B1 = (Button) findViewById ([login to view URL]); } public void IndicateTime (View view) { long TouchDown; long TotalDuration; [login to view URL](new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if ([login to view URL] () == MotionEvent.ACTION_DOWN) { TouchDown = [login to view URL] (); } else if ([login to view URL] () == MotionEvent.ACTION_UP) { TotalDuration = [login to view URL] () - TouchDown; } return true; } } } ----------------------------------------------------------------------------------------- I do not understand a single bit of what I'm doing. But. What I want, is, someone to fix the code, in order to make a little app which just have 1 button, and 1 text, and that: When you Press the Button, and Release it, It Tells you How Much Time Have Passed from When It Was Pressed. Just That. I leave a ScreenShot of the Code in Android Studio attached.