Android implementation of the stopwatch timer sample _android

This example describes the stopwatch timer implemented by Android. Share to everyone for your reference, specific as follows:

Package com.liu.time;
Import Java.util.Timer;
Import Java.util.TimerTask;
Import android.app.Activity;
Import Android.app.AlertDialog;
Import Android.content.Context;
Import Android.content.DialogInterface;
Import android.content.SharedPreferences;
Import Android.os.Bundle;
Import Android.os.Handler;
Import Android.os.Message;
Import Android.util.Log;
Import android.view.KeyEvent;
Import Android.view.Menu;
Import Android.view.MenuItem;
Import Android.view.View;
Import Android.widget.ImageButton;
Import Android.widget.TextView;
  public class MyTime extends activity {private long mlcount = 0;
  Private long mltimerunit = 100;
  Private TextView Tvtime;
  Private ImageButton Btnstartpause;
  Private ImageButton btnstop;
  Private timer timer = null;
  Private TimerTask task = null;
  Private Handler Handler = null;
  Private message msg = NULL;
  Private Boolean BISRUNNINGFLG = false;
  private static final String Mytimer_tag = "Mytimer_log"; menu item private static final int Setting_timer_unit_id = Menu.first;
  private static final int about_id = Menu.first + 1;
  private static final int exit_id = Menu.first + 2;
  private static final int setting_second_id = Menu.first + 101;
  private static final int setting_100millisecond_id = Menu.first + 102;
  Setting timer Unit flag private int settingtimerunitflg = setting_100millisecond_id; /** called the activity is a.
    * * @Override public void onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
    Setcontentview (R.layout.main);
    Tvtime = (TextView) Findviewbyid (r.id.tvtime);
    Btnstartpause = (ImageButton) Findviewbyid (r.id.btnstartpaunse);
    Btnstop = (ImageButton) Findviewbyid (r.id.btnstop);
    Sharedpreferences sharedpreferences = getsharedpreferences ("Mytimer_unit", context.mode_private);
    GetString () The second parameter is the default, and if the key does not exist in preference, the default value is returned Mltimerunit = Sharedpreferences.getlong ("Time_unit", 100); LOG.I (Mytimer_tag, "MltimerUnit = "+ Mltimerunit);
      if (1000 = = Mltimerunit) {//second SETTINGTIMERUNITFLG = setting_second_id;
    Tvtime.settext (R.string.init_time_second);
      else if (= = = Mltimerunit) {//millisecond SETTINGTIMERUNITFLG = setting_100millisecond_id;
    Tvtime.settext (R.string.init_time_100millisecond); 
        }//Handle timer Message Handler = new Handler () {@Override public void Handlemessage (msg) {
          TODO auto-generated Method Stub switch (msg.what) {case 1:mlcount++;
          int totalsec = 0;
          int Yushu = 0;
          if (setting_second_id = = SETTINGTIMERUNITFLG) {//SECOND totalsec = (int) (mlcount);  else if (setting_100millisecond_id = SETTINGTIMERUNITFLG) {//Millisecond totalsec = (int)
            (MLCOUNT/10);
          Yushu = (int) (mlcount% 10); }//Set time display int min = (TOTALSEC/60);
          int sec = (totalsec% 60); try {if (setting_second_id = SETTINGTIMERUNITFLG) {//SECOND (1000ms) tvtime.set
            Text (String.Format ("%1$02d:%2$02d", Min, sec); else if (setting_100millisecond_id = SETTINGTIMERUNITFLG) {//Millisecond Tvtime.sette
            XT (String.Format ("%1$02d:%2$02d:%3$d", Min, sec, Yushu));
            The catch (Exception e) {tvtime.settext ("+ min +": "+ sec +": "+ Yushu);
            E.printstacktrace ();
          LOG.E ("MyTimer onCreate", "Format string error.");
        } break;
        Default:break;
      Super.handlemessage (msg);
    }
    };
    Btnstartpause.setonclicklistener (Startpauselistener);
  Btnstop.setonclicklistener (Stoplistener);
   }//Start and pause view.onclicklistener startpauselistener = new View.onclicklistener () { @Override public void OnClick (View v) {//TODO auto-generated Method Stub log.i (Mytimer_tag, "Start/paus
      E is clicked. "); if (null = = timer) {if (null = Task) {task = new TimerTask () {@Override Publ IC void Run () {//TODO auto-generated method stub if (null = msg) {msg = NE
              W message ();
              else {msg = Message.obtain ();
              } msg.what = 1;
            Handler.sendmessage (msg);
        }
          };
        Timer = new timer (true); Timer.schedule (Task, Mltimerunit, mltimerunit);
        Set timer//Duration}//start if (!BISRUNNINGFLG) {BISRUNNINGFLG = true;
      Btnstartpause.setimageresource (R.drawable.pause);
          else {//pause try {bisrunningflg = false;
          Task.cancel ();
          task = null; Timer.cancel (); CancEl timer Timer.purge ();
          timer = null;
          Handler.removemessages (Msg.what);
        Btnstartpause.setimageresource (R.drawable.start);
        catch (Exception e) {e.printstacktrace ();
  }
      }
    }
  }; 
      Stop View.onclicklistener Stoplistener = new View.onclicklistener () {@Override public void OnClick (View v) {
      TODO auto-generated Method Stub log.i (Mytimer_tag, "Stop is clicked.");
        if (null!= timer) {task.cancel ();
        task = null; Timer.cancel ();
        Cancel timer timer.purge ();
        timer = null;
      Handler.removemessages (Msg.what);
      } mlcount = 0;
      BISRUNNINGFLG = false;
      Btnstartpause.setimageresource (R.drawable.start);
      if (setting_second_id = = SETTINGTIMERUNITFLG) {//SECOND Tvtime.settext (R.string.init_time_second); else if (setting_100millisecond_id = SETTINGTIMERUNITFLG) {//millisecond
        Tvtime.settext (R.string.init_time_100millisecond);
  }
    }
  };
    Menu @Override Public boolean oncreateoptionsmenu (Android.view.Menu menu) {//TODO auto-generated method stub
    Super.oncreateoptionsmenu (menu);
    LOG.I (Mytimer_tag, "menu is created.");
      Stop timer if (null!= Task) {task.cancel ();
    task = null;
      } if (null!= timer) {timer.cancel ();//Cancel Timer timer.purge ();
      timer = null;
    Handler.removemessages (Msg.what);
    } BISRUNNINGFLG = false;
    Mlcount = 0;
    Btnstartpause.setimageresource (R.drawable.start); Set the name of the submenu//submenu Settingmenu = Menu.addsubmenu (0, setting_timer_unit_id, 0,//R.string.menu_setting_timer_u
    NIT). SetIcon (r.drawable.setting);
    Increase the submenu/Sub menus does not support item icons by the corresponding name, or nested sub menus.
    Settingmenu.add (1, setting_second_id, 0,//R.string.menu_setting_second); Settingmenu.add (1, Setting_100milliseconD_ID, 1,//R.STRING.MENU_SETTING_100MILISEC);
    About//menu.add (0, about_id, 1,//R.string.menu_about). SetIcon (R.drawable.about);
    Exit//Menu.add (0, exit_id, 2, R.string.menu_exit). SetIcon (R.drawable.exit);
  return true; }//Menu Item @Override Public boolean onoptionsitemselected (MenuItem Item) {//TODO auto-generated method Stu
    b log.i (Mytimer_tag, "menu item is selected.");
    Switch (Item.getitemid ()) {case setting_timer_unit_id:break;
      Case ABOUT_ID://Display About dialog Alertdialog.builder Builder = new Alertdialog.builder (this);
      Builder.settitle (R.string.app_name). Setmessage ("This procedure is developed by the rain Dream/n Contact Author: minyugong@163.com"). Setcancelable (True) . Setpositivebutton ("OK", new Dialoginterface.onclicklistener () {public void OnClick (dialoginterface dialog, int
        ID) {dialog.cancel ();
      }
      });
      Alertdialog alert = Builder.create ();
      Alert.show (); BreAk Case Exit_id:finish ();
    Exit application break;
        Case SETTING_SECOND_ID://sec (1000ms) if (setting_second_id!= settingtimerunitflg) {mltimerunit = 1000;
      SETTINGTIMERUNITFLG = setting_second_id;
      } tvtime.settext (R.string.init_time_second);
    Break  Case SETTING_100MILLISECOND_ID://100 ms if (setting_100millisecond_id!= settingtimerunitflg) {Mltimerunit
        = 100;
      SETTINGTIMERUNITFLG = setting_100millisecond_id;
      } tvtime.settext (R.string.init_time_100millisecond);
    Break
      DEFAULT:LOG.I (Mytimer_tag, "other menu item ...");
    Break }//Save timer unit try {sharedpreferences sharedpreferences = getsharedpreferences ("Mytimer_un
      It ", context.mode_private);
      Sharedpreferences.editor Editor = Sharedpreferences.edit ();//Get Editor Editor.putlong ("Time_unit", mltimerunit); Editor.commit ()//Commit modification} catch (Exception e) {E.PRIntstacktrace ();
    LOG.E (Mytimer_tag, "Save timer Unit error.");
  return super.onoptionsitemselected (item); @Override public boolean onKeyDown (int keycode, keyevent event) {//TODO auto-generated Method stub if (Key Event.keycode_menu = = keycode) {super.openoptionsmenu ();//Call this, you can pop-up menu log.i (Mytimer_tag, "Menu key is clic
      ked. ");
        Stop timer if (null!= Task) {task.cancel ();
      task = null;
        } if (null!= timer) {timer.cancel ();//Cancel Timer timer.purge ();
        timer = null;
      Handler.removemessages (Msg.what);
      } BISRUNNINGFLG = false;
      Mlcount = 0;
      Btnstartpause.setimageresource (R.drawable.start);
    return true;
  Return Super.onkeydown (KeyCode, event);

 }
}

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