桌面小控件widget的創(chuàng)建、生命周期及

顯示在桌面的小控通過查看谷歌的API，了解相關(guān)的介紹：查看APIGuides →找到AppWidgetsview對象receivename：創(chuàng)建的廣播接收者的包名（完整的類名meta-data：提供元數(shù)據(jù)的，這里需要配置其資源文件（對應(yīng)的.xml文件如下）3xml文件夾，拷貝.xml在資 下創(chuàng)建xml文件夾，拷貝Widget生命周期說明：widget適合做widget的初始化（如數(shù)據(jù)庫的連接，的行情，服務(wù)的開啟適合掃尾操作（關(guān)閉服務(wù)，關(guān)閉數(shù)據(jù)庫4、onupdatewidgetupdatePeriodMillisTimer

timer=newTimer()tasknewTimerTask()TimerTaskrunwidget通過AppWidgetManager管理器的updateAppWidget(ComponentNameprovider參數(shù)1：要更新的組件的名字，widget的組件//widget的組件（更新的widget組件）ComponentNameprovider=newComponentName(pkg,2：組件的字節(jié)碼（Widget的字節(jié)碼）參數(shù)2：的view對象RemoteViewsviews=newRemoteViews(StringpackageName，inttimer.schedule(TimerTasktask,longdelay,long4onDestory5widgetonEnable方法，在這個方法中創(chuàng)建開啟服務(wù)6widget從界面上移除的時候，服務(wù)已經(jīng)沒有用處了，此時需要停止服務(wù)衛(wèi)士的進(jìn)程里，widget22、不同的進(jìn)程間進(jìn)行通信，需要實(shí)現(xiàn)同一套規(guī)范才能進(jìn)行數(shù)據(jù)的互傳，這就用到了RemoteViews對象，從這塊公共的空間中把view對象取出來，取出來之后就可以將自定義的布局展現(xiàn)出來了RemoteViewsviews=newRemoteViews(StringpackageName，int示例代publicpublicclassUpdateWidgetServiceextendsService{privateTimertimer;publicIBinderonBind(Intentintent){returnnull;}publicvoidonCreate(){timer=newTimer();task=newTimerTask(){publicvoidrun()//widget= widgetComponentNameprovider=new //widget//ipcinterprocesscommunication進(jìn)程間通訊，使用RemoteViews 衛(wèi)士中的進(jìn)程管理的數(shù)據(jù)為例views.setTextViewText(R.cess_count,"正在運(yùn)行軟件:"+:"+//Intent//Intent意圖,發(fā)廣 開啟activity開//PendingIntent延期的意圖,Intentintent=new =PendingIntent.getBroadcast(getApplicationContext(),0,intent,}timer.schedule(task,2000,}publicvoidonDestroy(){timer=null;task=null;}publicsafeWidgetpublicsafeWidgetextendsAppWidgetProviderprivatestaticfinalStringTAG= publicvoidonReceive(Contextcontext,Intentintent){super.onReceive(context,intent);}publicvoidonUpdate(Contextcontext,AppWidgetManagerappWidgetManager,int[]appWidgetIds){}}publicvoidonDeleted(Contextcontext,int[]appWidgetIds){}publicvoidonEnabled(Contextcontext){Intentintent=newIntent(context,UpdateWidgetService.class);}publicvoidonDisabled(Contextco