Android chronometer Control implements timer function detailed _android

This article shows you how to use the Chronometer control to implement an instance of an Android timer.

Put the final implementation diagram first:

The idea of Android timer implementation

Use the chronometer control to implement the action of the meter. Set the initial time by setting SetBase (long base) and add a setonchronometerticklistener to it (Chronometer.onchronometerticklistener L) Event to determine whether the time is up, and then call its stop () method to stop the timer.

Android Timer Implementation code
Main.xml:

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android= "http://schemas.android.com/apk/res/" Android "Android:layout_width=" Fill_parent "android:layout_height=" fill_parent "android:background=" @drawable/bac K "android:gravity=" center "android:orientation=" vertical "> <linearlayout android:layout_width=" fil L_parent "android:layout_height=" wrap_content "android:layout_margin=" 10dip "android:orientation=" Horizonta L "> <textview android:layout_width=" fill_parent "android:layout_height=" Wrap_content "a ndroid:layout_weight= "4" android:gravity= "Center" android:text= "Set Time:"/> <edittext Andr Oid:id= "@+id/edt_settime" android:layout_width= "fill_parent" android:layout_height= "Wrap_content" and roid:layout_weight= "1" android:inputtype= "number"/> </LinearLayout> <chronometer android: Id= "@+id/chronometer" AndroId:layout_width= "Fill_parent" android:layout_height= "wrap_content" android:gravity= "center" Android:textCol Or= "#ff0000" android:textsize= "60dip"/> <linearlayout android:layout_width= "Fill_parent" Androi d:layout_height= "Wrap_content" android:layout_margin= "10dip" android:orientation= "Horizontal" > <Bu Tton android:id= "@+id/btnstart" android:layout_width= fill_parent "android:layout_height=" Wrap_conten 
      T "android:layout_weight=" 1 "android:text=", "/>" <button android:id= "@+id/btnstop" 
      Android:layout_width= "Fill_parent" android:layout_height= "Wrap_content" android:layout_weight= "1" 
      android:text= "Stop Time"/> <button android:id= "@+id/btnreset" android:layout_width= "Fill_parent" android:layout_height= "Wrap_content" android:layout_weight= "1" android:text= "reset"/> </linear Layout> </lineaRlayout>  

Activity code:

Package com.jiahui.chronometer;  
Import android.app.Activity;  
Import Android.app.AlertDialog;  
Import Android.app.Dialog;  
Import Android.content.DialogInterface;  
Import Android.os.Bundle;  
Import Android.os.SystemClock;  
Import Android.text.format.Time;  
Import Android.view.View;  
Import Android.widget.Button;  
Import Android.widget.Chronometer;  
 
Import Android.widget.EditText;  
 
  public class Chronometerdemoactivity extends activity {private int starttime = 0;  
    public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);  
 
    Setcontentview (R.layout.main);  
 
    Final chronometer chronometer = (chronometer) Findviewbyid (r.id.chronometer);  
 
    Button btnstart = (button) Findviewbyid (R.id.btnstart);  
 
    Button Btnstop = (button) Findviewbyid (r.id.btnstop);  
 
    Button Btnrest = (button) Findviewbyid (R.id.btnreset);  
 
    Final EditText edtsettime = (edittext) Findviewbyid (r.id.edt_settime); Btnstart.setOnclicklistener (New View.onclicklistener () {@Override public void OnClick (View v) {SYSTEM.O  
        Ut.println ("--Start the time---");  
        String ss = Edtsettime.gettext (). toString (); if (!) ( Ss.equals ("") && SS!= null)) {starttime = Integer.parseint (Edtsettime.gettext (). ToS  
        Tring ());  
        //Set start time Chronometer.setbase (Systemclock.elapsedrealtime ());  
 
      Start Chronometer.start ();  
 
    }  
    }); Btnstop.setonclicklistener (New View.onclicklistener () {@Override public void OnClick (View v) {/  
      /stop Chronometer.stop ();  
 
    }  
 
    });   
        Reset Btnrest.setonclicklistener (New View.onclicklistener () {@Override public void OnClick (View v) {  
 
      Chronometer.setbase (Systemclock.elapsedrealtime ());  
    }  
 
    }); Chronometer. Setonchronometerticklistener (New CHRONOMETER.ONCHROnometerticklistener () {@Override public void Onchronometertick (chronometer chronometer) { If the start timer is now more than startime seconds if (Systemclock.elapsedrealtime ()-Chronometer.getbase ()  
              > StartTime * 1000) {chronometer.stop ();  
            Give the user prompt ShowDialog ();  
  }  
          }  
        });  
     } protected void ShowDialog () {Alertdialog.builder Builder = new Alertdialog.builder (this);  
    Builder.seticon (R.DRAWABLE.EB28D25);  
          Builder.settitle ("Warning"). Setmessage ("Time to"). Setpositivebutton ("OK", new Dialoginterface.onclicklistener () {  
 
    @Override public void OnClick (Dialoginterface dialog, int which) {}});  
    Alertdialog dialog = Builder.create ();  
  Dialog.show ();  }  
}

The above is about the Android Chronometer control implementation Timer related functions, I hope to learn more about Android software programming help.