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copied!<p>try this code - </p> <pre><code>import java.util.Timer; import java.util.TimerTask; import net.rim.device.api.ui.Field; import net.rim.device.api.ui.FieldChangeListener; import net.rim.device.api.ui.UiApplication; import net.rim.device.api.ui.component.ButtonField; import net.rim.device.api.ui.component.Dialog; import net.rim.device.api.ui.component.RichTextField; import net.rim.device.api.ui.container.HorizontalFieldManager; import net.rim.device.api.ui.container.MainScreen; public class stopwatch extends MainScreen { private RichTextField _chronometer; Timer timer; private int second = 0, minute = 0, hour = 0; private boolean _sec = false, _min = false, _hou = false; ButtonField record,stop; public stopwatch() { record=new ButtonField("Start"); stop=new ButtonField("Stop"); _chronometer = new RichTextField("0" + hour + ":0" + minute + ":0" + second, RichTextField.TEXT_ALIGN_HCENTER | Field.NON_FOCUSABLE); add(_chronometer); HorizontalFieldManager hfm=new HorizontalFieldManager(FIELD_HCENTER); record.setMargin(net.rim.device.api.system.Display.getHeight()/2,0,0,0); stop.setMargin(net.rim.device.api.system.Display.getHeight()/2,0,0,20); hfm.add(record); hfm.add(stop); add(hfm); FieldChangeListener listener = new FieldChangeListener() { public void fieldChanged(Field field, int context) { if(field==record){ try { try { timer = new Timer(); resetChronometer(); timer.scheduleAtFixedRate(new Chronometer(), 1000, 1000); } catch (Exception e) { e.printStackTrace(); } } catch (Exception e) { Dialog.alert(e.toString()); } } if(field==stop){ try { timer.cancel(); } catch (Exception e) { Dialog.alert(e.toString()); } } } }; record.setChangeListener(listener); stop.setChangeListener(listener); } private class Chronometer extends TimerTask { public void run() { try { second++; UiApplication.getUiApplication().invokeLater(new Runnable() { public void run() { if (_min == true) { _min = false; minute = minute + 1; second = 0; } if (_hou == true) { _hou = false; hour = hour + 1; minute = 0; } if (second == 59) { _min = true; if (minute == 59) { _hou = true; } } if (second <= 9 && minute <= 9 && hour <= 9) { _chronometer.setText("0" + hour + ":0" + minute + ":0" + second); } if (second > 9 && minute <= 9 && hour <= 9) { _chronometer.setText("0" + hour + ":0" + minute + ":" + second); } if (second <= 9 && minute > 9 && hour <= 9) { _chronometer.setText("0" + hour + ":" + minute + ":0" + second); } if (second <= 9 && minute <= 9 && hour > 9) { _chronometer.setText("" + hour + ":0" + minute + ":0" + second); } if (second > 9 && minute > 9 && hour > 9) { _chronometer.setText(hour + ":" + minute + ":" + second); } if (second > 9 && minute > 9 && hour <= 9) { _chronometer.setText("0" + hour + ":" + minute + ":" + second); } if (second > 9 && minute <= 9 && hour > 9) { _chronometer.setText("" + hour + ":0" + minute + ":" + second); } if (second <= 9 && minute > 9 && hour > 9) { _chronometer.setText("0" + hour + ":" + minute + ":" + second); } // rt.setText(hour+":"+minute+":"+second); } }); // timer.cancel(); } catch (Exception e) { e.printStackTrace(); } } } public void resetChronometer() { _chronometer.setText("00:00:00"); second = 0; minute = 0; hour = 0; } } </code></pre>

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