My android advanced tour --> Android widget desktop digital clock (digtalclockwidget) instance

Step 1: Create a project digtalclockwidget and import the image with the displayed time to the drawable folder directory:

The images are as follows:

Step 2: Compile the widget UI

A./XML/appwidget_provider.xml

<? XML version = "1.0" encoding = "UTF-8"?> <! -- Specify the basic configuration information of the Desktop component: minwidth: minimum width of the desktop widget. Minwidth: minimum height of the desktop widget. Updateperiodmillis: update frequency initiallayout: initial layout displayed --> <! -- Specify the widget layout interface as @ layout/main --> <appwidget-provider xmlns: Android = "http://schemas.android.com/apk/res/android" Android: initiallayout = "@ layout/main" Android: minheight = "30px" Android: minwidth = "300px" Android: updateperiodmillis = "500"/>

B./layout/Main. xml

<? XML version = "1.0" encoding = "UTF-8"?> <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" Android: Id = "@ + ID/digit" Android: layout_width = "fill_parent" Android: layout_height = "fill_parent" Android: orientation = "horizontal" Android: gravity = "center"> <! -- Define 19 imageviews to display LCD numbers --> <imageview Android: Id = "@ + ID/img01" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img02" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: id = "@ + ID/img03" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img04" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img05" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: src = "@ drawable/digity"/> <imageview Android: Id = "@ + ID/img06" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img07" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: id = "@ + ID/img08" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: src = "@ drawable/digity"/> <imageview Android: id = "@ + ID/img09" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img10" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img11" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: src = "@ drawable/digite"/> <imageview Android: Id = "@ + ID/img12" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img13" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: id = "@ + ID/img14" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: src = "@ drawable/digit"/> <imageview Android: id = "@ + ID/img15" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img16" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/img17" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: src = "@ drawable/digit"/> <imageview Android: Id = "@ + ID/img18" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: src = "@ drawable/digit"/> <imageview Android: Id = "@ + ID/img19" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> </linearlayout>

Step 3: androidmanifest. xml

<? XML version = "1.0" encoding = "UTF-8"?> <Manifest xmlns: Android = "http://schemas.android.com/apk/res/android" package = "CN. roco. widget. clock "Android: versioncode =" 1 "Android: versionname =" 1.0 "> <uses-SDK Android: minsdkversion =" 8 "/> <application Android: icon = "@ drawable/icon" Android: Label = "@ string/app_name"> <! -- Specify the broadcast Receiver --> <receiver er Android: Name = "timewidgetprovider"> <intent-filter> <action Android: Name = "android. appwidget. action. appwidget_update "/> </intent-filter> <meta-data Android: Name =" android. appwidget. provider "Android: Resource =" @ XML/appwidget_provider "/> <! -- Specify provider --> </explorer> <! -- Specify the clock service --> <service android: Name = ". timeservice"/> </Application> </manifest>

Step 4: timeservice. Java

Package CN. roco. widget. clock; import Java. text. simpledateformat; import Java. util. date; import Java. util. timer; import Java. util. timertask; import android. app. pendingintent; import android. app. service; import android. appwidget. appwidgetmanager; import android. content. componentname; import android. content. intent; import android.net. uri; import android. OS. ibinder; import android. widget. remoteviews; public class t Imeservice extends Service {// set 0 ~ 9. The LCD digital image is defined as an array private int [] digits = new int [] {R. drawable. digit00, R. drawable. digit01, R. drawable. digit02, R. drawable. digit03, R. drawable. digit04, R. drawable. digit05, R. drawable. digit06, R. drawable. digit07, R. drawable. digit08, R. drawable. digit09,}; // define the imageview that displays the hour, minute, and second of the year, month, and day as an array private int [] digitviews = new int [] {R. id. img01, R. id. img02, R. id. img03, R. id. img04, R. id. img06, R. id. img07, R. id. img09, R. id. img10, R. id. img12, R. id. img13, R. id. img15, R. id. img16, R. id. img18, R. id. img19}; private timer; private timertask = new timertask () {@ overridepublic void run () {/** get and format the current time */simpledateformat SDF = new simpledateformat ("yyyymmddhhmmss"); string time = SDF. format (new date ();/** get the view of the display time */remoteviews views = new remoteviews (getpackagename (), R. layout. main); For (INT I = 0; I <time. length (); I ++) {// converts the I-th numeric character to the corresponding number int num = time. charat (I)-48; // set the I-th image as the corresponding LCD digital image views. setimageviewresource (digitviews [I], digits [num]);}/** call the dialup Program */intent = new intent (intent. action_view, Uri. parse ("Tel: 10086"); pendingintent = pendingintent. getactivity (getapplicationcontext (), 0, intent, 0); views. setonclickpendingintent (R. id. digit, pendingintent);/** display of update time */appwidgetmanager = appwidgetmanager. getinstance (getapplicationcontext (); // wrap the appwidgetprovider subclass instance into the componentname object componentname = new componentname (getapplicationcontext (), timewidgetprovider. class); // call appwidgetmanager to add remoteviews to the componentname appwidgetmanager. updateappwidget (componentname, views) ;};@ overridepublic void oncreate () {super. oncreate (); // defines the timer = new timer (); // starts the periodic scheduling timer. schedule (timertask, 0, 1000) ;}@ overridepublic ibinder onbind (intent) {return NULL ;}@ overridepublic void ondestroy () {super. ondestroy (); timer. cancel (); timer = NULL ;}}

Step 5: timewidgetprovider. Java

Package CN. roco. widget. clock; import android. appwidget. appwidgetmanager; import android. appwidget. appwidgetprovider; import android. content. context; import android. content. intent; public class timewidgetprovider extends appwidgetprovider {@ overridepublic void onupdate (context, appwidgetmanager, int [] appwidgetids) {}/** called when the user deletes widgets from the desktop */@ overridepublic void ondeleted (context, int [] appwidgetids) {}/*** is called only when widgets is added to the desktop for the first time. * When widgets of the same type is added to the desktop, it will not be called */@ overridepublic void onenabled (context) {// start the service context. startservice (new intent (context, timeservice. class);}/** call */@ overridepublic void ondisabled (context) {// stop the service context when the last widgets instance of the same type is deleted. stopservice (new intent (context, timeservice. class ));}}

Step 6: deploy the application to the simulator. After deployment, open the widget.

The application is as follows:

The project source code in: http://pan.baidu.com/share/link? Consumer id = 403033 & UK = 805959799

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Author: Ouyang Peng: Welcome to repost. sharing with others is the source of progress!

Reprinted Please retain the original address: http://blog.csdn.net/ouyang_peng

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