Timer task TimerTask run cancel Android example

public class TimerActivity extends Activity { TimerTask; mTimerTask final Handler handler = new Handler(); Timer t = new Timer(); TextView; hTextView TableRow; hTableRow Button hButton, ; hButtonStop private int nCounter = 0;@Override public void(onCreateBundle) savedInstanceState { super.onCreate(savedInstanceState); (layoutmain); setContentViewR.. hTextView = (TextView) findViewById(R.id.idTextView); hButton = (Button) findViewById(R.id.idButton); setOnClickListener(); hButton.mButtonStartListener hButtonStop = (Button) findViewById(R.id.idButtonStop); hButtonStop.setOnClickListener(mButtonStopListener); } // end onCreate View.OnClickListener mButtonStartListener = new OnClickListener() { public void onClick(View v) { doTimerTask(); } }; View.OnClickListener mButtonStopListener = new OnClickListener() { public void onClick(View v) { stopTask(); } } ; public void doTimerTask() { mTimerTask = new TimerTask() { public void run() { handler.post(new Runnable() { public void run() { nCounter++; // update TextView hTextView.setText("Timer: " + nCounter); Log.d("TIMER", "TimerTask run"); } }); } }; // public void schedule (TimerTask task, long delay, long period) t.schedule(mTimerTask, 500, 3000); // } public void stopTask() { if (mTimerTask != null) { hTextView.setText("Timer canceled: " + nCounter); Log.d("TIMER", "timer canceled"); mTimerTask.cancel(); } } }