Android with Countdown control chronometer use method detailed _android

Company's previous project, see Using this Android with the countdown control chronometer, now integrates

First look at the effect:

<chronometer 
  android:id= "@+id/chronometer" 
  android:layout_width= "wrap_content" 
  android:layout_ height= "30DP"/> 
 <button 
  android:onclick= "Start" 
  android:text= "starting" 
  android:layout_width= " Wrap_content " 
  android:layout_height=" wrap_content "/> 
 <button android:onclick= 
  " Stop " 
  android:text= "Stop" 
  android:layout_width= "wrap_content" 
  android:layout_height= "Wrap_content"/> 
 <button 
  android:onclick= "reset" 
  android:text= "reset" 
  android:layout_width= "Wrap_content" 
  android:layout_height= "Wrap_content"/> 

Method Introduction:

 long getbase ();//return base time, set by SetBase (long), can be a systemclock.elapsedrealtime () String GetFormat ()//returns the current string format, which is a void setbase (long base) implemented via SetFormat ();//Set time, value of the count timer specified void SetFormat (string format) //Set What is displayed, the timer will show the value of this argument, and if the string is null, the value returned is the MM:SS format 

Private chronometer chronometer; 
 The total time recorded by private long recordtime;// 
 @Override 
 protected void onCreate (Bundle savedinstancestate) { 
  Super.oncreate (savedinstancestate); 
  Setcontentview (r.layout.activity_main); 
  Chronometer= (chronometer) Findviewbyid (r.id.chronometer); 
  Chronometer.setformat ("Timing:%s");//Setting the format displayed 
  toast.maketext (mainactivity.this, "" +recordtime, Toast.length_short ). Show (); 
 public void Start (view view) { 
  chronometer.setbase (systemclock.elapsedrealtime ()-recordtime);//Skip the time that has been recorded 
  Chronometer.start (); 
 } 
 public void Stop (view view) { 
  chronometer.stop (); 
  Recordtime=systemclock.elapsedrealtime ()-chronometer.getbase ()//time to save this record 
 } public 
 void Reset (View View) { 
  recordtime=0;//reset time 
  chronometer.setbase (Systemclock.elapsedrealtime ()); 
 } 

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