Countdown using digital controls

 

 

<? XML version = "1.0" encoding = "UTF-8"?> <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" Android: layout_width = "match_parent" Android: layout_height = "match_parent" Android: gravity = "center_horizontal" Android: orientation = "vertical"> <linearlayout Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: Orientation = "horizontal" Android: gravity = "center_horizontal: paddingleft = "3dp"> <numberpicker Android: Id = "@ + ID/Np1" Android: layout_width = "50dp" Android: layout_height = "wrap_content"/> <textview Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: layout_gravity = "center_vertical | center_horizontal" Android: textsize = "20sp" Android: text = ": "/> <numberpicker Android: Id =" @ + ID/NP2 "Android: layout_width =" 50dp "Android: layout_height =" wrap_content "Android: layout_marginleft = "5dip"/> <textview Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: layout_gravity = "center_vertical | center_horizontal" Android: textsize = "20sp" Android: text = ":"/> <numberpicker Android: Id = "@ + ID/np3" Android: layout_width = "50dp" Android: layout_height = "wrap_content"/> </linearlayout> <textview Android: Id = "@ + ID/TXT" Android: layout_width = "fill_parent" Android: layout_height = "wrap_content"/> <linearlayout Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: Orientation = "horizontal"> <textview Android: id = "@ + ID/showtiqian" Android: layout_width = "fill_parent" Android: layout_height = "wrap_content"/> </linearlayout> <linearlayout Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: Orientation = "horizontal"> <button Android: Id = "@ + ID/btn_start" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: text = "Start countdown"/> <button Android: Id = "@ + ID/button1" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: text = "stop"/> <textview Android: Id = "@ + ID/showcount" Android: layout_width = "fill_parent" Android: layout_height = "wrap_content"/> </linearlayout>

　　

Package COM. example. activity; import Java. util. calendar; import android. annotation. suppresslint; import android. app. activity; import android. OS. bundle; import android. OS. handler; import android. view. view; import android. view. view. onclicklistener; import android. widget. button; import android. widget. numberpicker; import android. widget. numberpicker. onvaluechangelistener; import android. widget. textview; import com. Example. test. r; public class timecountactivity extends activity {private Boolean stop = true; private numberpicker msecondspinner; private numberpicker mhourspinner; private numberpicker extends; private textview timecount; private button btn_start, btn1; private calendar mdate; private int mhour, mminute, msecond; private handler mhandler = new handler (); // global handlerint time = 0; // time difference @ suppresslint ("Newapi") protected void oncreate (bundle savedinstancestate) {setcontentview (R. layout. timecount); super. oncreate (savedinstancestate); mdate = calendar. getinstance (); mhour = mdate. get (calendar. hour_of_day); mminute = mdate. get (calendar. minute); msecond = mdate. get (calendar. second); mhourspinner = (numberpicker) This. findviewbyid (R. id. np1); mhourspinner. setmaxvalue (23); mhourspinner. setminvalue (0); mhourspin Ner. setvalue (mhour); mhourspinner. setonvaluechangedlistener (monhourchangedlistener); mminutespinner = (numberpicker) This. findviewbyid (R. id. NP2); mminutespinner. setmaxvalue (59); mminutespinner. setminvalue (0); mminutespinner. setvalue (mminute); mminutespinner. setonvaluechangedlistener (monminutechangedlistener); msecondspinner = (numberpicker) This. findviewbyid (R. id. np3); msecondspinner. setmaxvalue (59); mseco Ndspinner. setminvalue (0); msecondspinner. setvalue (msecond); msecondspinner. setonvaluechangedlistener (mondatechangedlistener); timecount = (textview) This. findviewbyid (R. id. showcount); btn_start = (button) This. findviewbyid (R. id. btn_start); btn_start.setonclicklistener (New mclick (); btn1 = (button) This. findviewbyid (R. id. button1); btn1.setonclicklistener (New mclick ();} class mclick implements onclicklist Ener {public void onclick (view v) {If (V = btn_start) {stop = false; time = msecond + mminute * 60 + mhour * 3600; new thread (New timecount ()). start (); // enable thread} else if (V = btn1) {stop = true ;}}@ suppresslint ("newapi") Private numberpicker. onvaluechangelistener mondatechangedlistener = new onvaluechangelistener () {@ suppresslint ("newapi") Public void onvaluechange (numberpicker Picker, int oldval, int newval) {m Second = mhourspinner. getvalue () ;};@ suppresslint ("newapi") Private numberpicker. onvaluechangelistener listener = new onvaluechangelistener () {@ suppresslint ("newapi") Public void onvaluechange (numberpicker Picker, int oldval, int newval) {mhour = mhourspinner. getvalue () ;};@ suppresslint ("newapi") Private numberpicker. onvaluechangelistener monminutechangedlistener = new onvaluechangelisten Er () {@ suppresslint ("newapi") Public void onvaluechange (numberpicker Picker, int oldval, int newval) {mminute = mminutespinner. getvalue () ;}}; class timecount implements runnable {@ overridepublic void run () {While (! Stop & time> 0) // the cycle of the entire countdown execution {time --; mhandler. post (New runnable () // use it to modify the remaining time displayed in the UI main thread {public void run () {timecount. settext (getinterval (time); // display the remaining time}); try {thread. sleep (1000); // thread sleep for one second. This is the countdown interval} catch (interruptedexception e) {e. printstacktrace () ;}/// below is the countdown end logic mhandler. post (New runnable () {@ overridepublic void run () {timecount. settext ("the set time is up. ") ;}}}}/ *** Set the display text */public static string getinterval (INT time) {string TXT = NULL; If (Time> = 0) {long hour = time % (24*3600)/3600; // hour long minute = time % 3600/60; // minute long second = time % 60; // second TXT = "still available:" + hour + "Hour" + minute + "Minute" + second + "second ";} else {TXT = "expired";} return TXT ;}}