The seventh bullet in Android development: simple clock (stopwatch)

The seventh bullet in Android development: simple clock (stopwatch)

This article undertakes, Android Development Fifth play: simple clock (alarm clock) and Android Development Sixth play: simple clock (timer), this part is about the stopwatch.

Layout

You can also create a new class (StopWatchView), extend it from LinearLayout, and use it for layout.

      
       
        
         
       
        
         
          
          
            < / LinearLayout> 
           
             < / ListView> 
            
             
             
             
             
            
           
          
         
        
       
      
     
    
   
      < / LinearLayout>

StopWatchView

These balabala items should also be defined at the beginning:

    private int tenMSecs = 0;    private Timer timer = new Timer();    private TimerTask timerTask = null;    private TimerTask showTimeTask = null;    private TextView tvHour, tvMinute, tvSecond, tvMSecond;    private Button btnSWStart, btnSWResume, btnSWReset, btnSWPause, btnSWRecord;    private ListView lvWatchTimeList;    private ArrayAdapter
  
    adapter;    private static final int MSG_WHAT_SHOW_TIME = 1;    public StopWatchView(Context context) {        super(context);    }    public StopWatchView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public StopWatchView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }
  

Looking at these comments, I found that there is no difference with the previous two articles. I will not talk nonsense about the Code directly.

@ Override protected void onFinishInflate () {super. onFinishInflate (); // set each corresponding TextView control to 0 tvHour = (TextView) findViewById (R. id. tvHour); tvHour. setText (0); tvMinute = (TextView) findViewById (R. id. tvMinute); tvMinute. setText (0); tvSecond = (TextView) findViewById (R. id. tvSecond); tvSecond. setText (0); tvMSecond = (TextView) findViewById (R. id. tvMSceond); tvMSecond. setText (0); // set the listening event btnSWRecord = (Button) findViewById (R. id. btnSWRecord); btnSWRecord. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {adapter. insert (String. format (% d: % d. % d, tenMSecs/100/60/60, tenMSecs/100/60% 60, tenMSecs/100% 60, tenMSecs % 100), 0) ;}}); btnSWPause = (Button) findViewById (R. id. btnSWPause); btnSWPause. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {// stop stopTimer (); btnSWPause. setVisibility (View. GONE); btnSWResume. setVisibility (View. VISIBLE); btnSWReset. setVisibility (View. VISIBLE); btnSWRecord. setVisibility (View. GONE) ;}}); btnSWReset = (Button) findViewById (R. id. btnSWReset); btnSWReset. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {// stop stopTimer (); tenMSecs = 0; adapter. clear (); btnSWStart. setVisibility (View. VISIBLE); btnSWPause. setVisibility (View. GONE); btnSWReset. setVisibility (View. GONE); btnSWRecord. setVisibility (View. GONE); btnSWResume. setVisibility (View. GONE) ;}}); btnSWResume = (Button) findViewById (R. id. btnSWResume); btnSWResume. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {// start startTimer (); btnSWResume. setVisibility (View. GONE); btnSWReset. setVisibility (View. GONE); btnSWRecord. setVisibility (View. VISIBLE); btnSWPause. setVisibility (View. VISIBLE) ;}}); btnSWStart = (Button) findViewById (R. id. btnSWStart); btnSWStart. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {// start startTimer (); btnSWStart. setVisibility (View. GONE); btnSWPause. setVisibility (View. VISIBLE); btnSWRecord. setVisibility (View. VISIBLE) ;}}); btnSWRecord. setVisibility (View. GONE); btnSWPause. setVisibility (View. GONE); btnSWReset. setVisibility (View. GONE); btnSWResume. setVisibility (View. GONE); // Add the adapter to the list lvWatchTimeList = (ListView) findViewById (R. id. lvWatchTimeList); adapter = new ArrayAdapter
  
   
(GetContext (), android. r. layout. simple_list_item_1); lvWatchTimeList. setAdapter (adapter); // send the message showTimeTask = new TimerTask () {@ Override public void run () {Handler. sendEmptyMessage (MSG_WHAT_SHOW_TIME) ;}}; // start timing timer. schedule (showTimeTask, 200,200);} // start private void startTimer () {if (timerTask = null) {timerTask = new TimerTask () {@ Override public void run () {tenMSecs ++ ;}}; Timer. schedule (timerTask, 10, 10) ;}// end private void stopTimer () {if (timerTask! = Null) {timerTask. cancel (); timerTask = null ;}// cancel timing public void onDestory () {timer. cancel ();} private Handler handler = new Handler () {public void handleMessage (Message msg) {switch (msg. what) {// if the message matches, the corresponding time is calculated and displayed on the corresponding TextView. case MSG_WHAT_SHOW_TIME: tvHour. setText (tenMSecs/100/60/60/60 +); tvMinute. setText (tenMSecs/100/60% 60 +); tvSecond. setText (tenMSecs/100% 60 +); tvMSecond. setText (tenMSecs % 100 +); break; default: break ;}};};
  

End

Okay, this is the end.

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