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1、Android如何將定制的Launcher成為系統(tǒng)中唯一的Launcher2011-01-1711:12如果你要定制一個(gè)Android系統(tǒng)，你想用你自己的Launcher(Home)作主界面來替換Android自己的Home，而且不希望用戶安裝的Launcher來替換掉你的Launcher.我們可以通過修改Framework來實(shí)現(xiàn)這樣的功能。這里以Android2.1的源代碼為例來實(shí)際說明。1)首先了解一下Android的啟動(dòng)過程。??Android系統(tǒng)的啟動(dòng)先從Zygote開始啟動(dòng)，然后……(中間的過程就不
2、說了)…..一直到了SystemServer(framework)這個(gè)地方，看到這段代碼：????/**????*ThismethodiscalledfromZygotetoinitializethesystem.Thiswillcausethenative????*services(SurfaceFlinger,AudioFlinger,etc..)tobestarted.Afterthatitwillcallback????*upintoinit2()tostarttheAndroidservices.?
3、???*/??nativepublicstaticvoidinit1(String[]args);??publicstaticvoidmain(String[]args){??????if(SamplingProfilerIntegration.isEnabled()){????????SamplingProfilerIntegration.start();????????timer=newTimer();????????timer.schedule(newTimerTask(){??????????@Ove
4、rride??????????publicvoidrun(){??????????????SamplingProfilerIntegration.writeSnapshot(“system_server”);??????????}????????},SNAPSHOT_INTERVAL,SNAPSHOT_INTERVAL);??????}??????//Thesystemserverhastorunallofthetime,soitneedstobe??????//asefficientaspossiblewi
5、thitsmemoryusage.??????VMRuntime.getRuntime().setTargetHeapUtilization(0.8f);??????System.loadLibrary(“android_servers”);??????init1(args);??}??publicstaticfinalvoidinit2(){??????Log.i(TAG,“EnteredtheAndroidsystemserver!”);??????Threadthr=newServerThread();
6、??????thr.setName(“android.server.ServerThread”);??????thr.start();??}}從SystemServer的main函數(shù)開始啟動(dòng)各種服務(wù)。首先啟動(dòng)init1,然后啟動(dòng)init2.從上面的注釋可以看到：init1這個(gè)方法時(shí)被Zygote調(diào)用來初始化系統(tǒng)的，init1會(huì)啟動(dòng)native的服務(wù)如SurfaceFlinger,AudioFlinger等等，這些工作做完以后會(huì)回調(diào)init2來啟動(dòng)Android的service。這里我們主要來關(guān)注init2的過
7、程。init2中啟動(dòng)ServerThread線程，ServerThread中啟動(dòng)了一系列的服務(wù)，比如這些：ActivityManagerServiceEntropyServicePowerManagerServiceTelephonyRegistryPackageManagerServiceAccountManagerServiceBatteryServiceHardwareServiceWatchdogSensorServiceBluetoothServiceStatusBarServiceClipboar
8、dServiceInputMethodManagerServiceNetStatServiceConnectivityServiceAccessibilityManagerServiceNotificationManagerServiceMountServiceDeviceStorageMonitorServiceLocationManagerServiceSearchManagerServiceF
