鎖屏流程演講

鎖屏界面

CompanyLogo鎖屏界面介紹菜單鎖屏界面組成鎖屏顯示規(guī)則鎖屏啟動(dòng)流程個(gè)人總結(jié)

鎖屏界面組成：LockScreen：滑動(dòng)鎖（系統(tǒng)默認(rèn)的波紋鎖）如下圖：該界面對(duì)應(yīng)自定義View是LockScreen.java類路徑位于： frameworks\policies\base\phone\com\android\internal\policy\impl\LockScreen.javaUnLockScreen：進(jìn)入手機(jī)設(shè)置-->安全-->屏幕鎖定（在列表中可以選擇：圖案、密碼、Pin等鎖屏都是UnLockScreen）圖案開(kāi)鎖界面PatternUnlockScreen.java路徑位于： frameworks\policies\base\phone\com\android\internal\policy\impl顯示規(guī)則這兩種界面的組合也是有很多變化的，總的規(guī)則如下：首先顯示LockScreen界面，接著判斷是否開(kāi)啟了UnLockScreen界面，如果設(shè)置了UnLockScreen界面，則進(jìn)入對(duì)應(yīng)的UnLockScreen界面去解鎖，才算成功解鎖。但，存在一種特殊的情況，就是假如我們選擇了圖UnLockScreen界面，是不會(huì)顯示LockScreen界面，而只會(huì)顯示UnLockScreen界面。修改后規(guī)則，首先判斷是否有新的sim卡或者無(wú)sim卡狀態(tài)，如果是這兩種狀態(tài)，啟動(dòng)設(shè)計(jì)的模式。接著調(diào)用KeyguardViewMediator類中的onSystemReady()方法，代碼如下： publicclassKeyguardViewMediatorimplementsKeyguardViewCallback,KeyguardUpdateMonitor.InfoCallback,KeyguardUpdateMonitor.SimStateCallback{ publicvoidonSystemReady(){synchronized(this){if(DEBUG)Log.d(TAG,"onSystemReady");mSystemReady=true;doKeyguardLocked();//zzt}} 接著調(diào)用KeyguardViewMediator.doKeyguardLocked(); 方法，在該方法中需要判斷是否滿足直接返回，如果不則調(diào)用KeyguardViewMediator.showLock()方法代碼如下：鎖屏啟動(dòng)流程分析手機(jī)開(kāi)機(jī)時(shí)，在SystemServer類的init2()方法啟動(dòng)線程類ServerThread的run()方法，代碼如下：classServerThreadextendsThread{WindowManagerServicewm=null; run(){ try{wm.systemReady();//zzt}catch(Throwablee){reportWtf("makingWindowManagerServiceready",e);} }}從上述代碼中的wm為WindowManagerService的引用，wm.systemReady()為調(diào)用WindowManagerService的systemReady()方法，代碼如下：publicclassWindowManagerServiceextendsIWindowManager.StubimplementsWatchdog.Monitor,WindowManagerPolicy.WindowManagerFuncs{ finalWindowManagerPolicymPolicy=PolicyManager.makeNewWindowManager();//zzt publicvoidsystemReady(){ mPolicy.systemReady();//zzt } } WindowManagerPolicy實(shí)現(xiàn)類是PhoneWindowManager，間接的調(diào)用systemReady();代碼如下：publicclassPhoneWindowManagerimplementsWindowManagerPolicy{ publicvoidsystemReady(){//tellthekeyguardmKeyguardMediator.onSystemReady();//zzt重點(diǎn)android.os.SystemProperties.set("dev.bootcomplete","1");synchronized(mLock){updateOrientationListenerLp();mSystemReady=true;mHandler.post(newRunnable(){publicvoidrun(){updateSettings();}});}}privatevoidshowLocked(){if(DEBUG)Log.d(TAG,"showLocked");//ensurewestayawakeuntilwearefinisheddisplayingthekeyguardmShowKeyguardWakeLock.acquire();//zzt確保屏//幕喚醒狀態(tài)Messagemsg=

mHandler.obtainMessage(SHOW);//zzt發(fā)送消息mHandler.sendMessage(msg);}通過(guò)Handler發(fā)送消息SHOW到handMessage()處理，代碼如下：

privateHandlermHandler=newHandler(){@OverridepublicvoidhandleMessage(Messagemsg){switch(msg.what){caseSHOW:handleShow();return;caseHIDE:handleHide();return;caseRESET:handleReset();return;break;}}};調(diào)用handleShow()方法去操作鎖屏的顯示，代碼如下：privatevoidhandleShow(){synchronized(KeyguardViewMediator.this){if(DEBUG)Log.d(TAG,"handleShow");if(!mSystemReady)return;mKeyguardViewManager.show();//zztmShowing=true;adjustUserActivityLocked();adjustStatusBarLocked();try{ActivityManagerNative.getDefault().closeSystemDialogs("lock");}catch(RemoteExceptione){}//Dothisattheendtonotslowdowndisplayofthekeyguard.playSounds(true);mShowKeyguardWakeLock.release();} 接著調(diào)用KeyguardViewManager.show()方法，而show中判斷KeyguardViewHost（mKeyguardHost）和LockPatternKeyguardViewProperties（mKeyguardView）是否為空進(jìn)行判斷。

1）如果KeyguardViewHost為空，就創(chuàng)建KeyguardViewhost,同時(shí)設(shè)置更新相關(guān)的布局參數(shù)。然后根據(jù)將KeyguardViewHost對(duì)象添加到WindowManagerImpl中。2）如果LockPatternKeyguardview為空，創(chuàng)建LockpatternKeyguardView對(duì)象，通過(guò)調(diào)用LockPatternKeyguardviewProperties.createKeyguardView()創(chuàng)建。同時(shí)為它設(shè)置回調(diào)。然后將創(chuàng)建得到的對(duì)象添加到KeyguardViewhost，代碼如下：publicsynchronizedvoidshow(){ if(mKeyguardHost==null){ mKeyguardHost=new KeyguardViewHost(mContext,mCallback); mViewManager.addView(mKeyguardHost,lp);} if(mKeyguardView==null){ mKeyguardView= mKeyguardViewProperties.createKeyguardView(mContext,mUpdateMonitor,this);mKeyguardHost.addView(mKeyguardView,lp);if(mScreenOn){mKeyguardView.show(); }}在上面的代碼中，當(dāng)KeyguardViewHost為空時(shí)，首先會(huì)調(diào)用KeyguardviewProperties的實(shí)現(xiàn)類LockPatternKeyguardviewProperties的createKeyguardView的方法，來(lái)構(gòu)造一個(gè)LockPatternKeyguardview對(duì)象，如下：publicLockPatternKeyguardViewProperties(LockPatternUtilslockPatternUtils,KeyguardUpdateMonitorupdateMonitor){mLockPatternUtils=lockPatternUtils;mUpdateMonitor=updateMonitor;}publicKeyguardViewBasecreateKeyguardView(Contextcontext,KeyguardUpdateMonitorupdateMonitor,KeyguardWindowControllercontroller){returnnewLockPatternKeyguardView(context,updateMonitor,mLockPatternUtils,controller);}而在LockPattenKeyguardView的構(gòu)造函數(shù)中，有如下調(diào)用publicclassLockPatternKeyguardViewextendsKeyguardViewBaseimplementsHandler.Callback,KeyguardUpdateMonitor.InfoCallback{ updateScreen(getInitialMode(),false);}getInitialMode()得到當(dāng)前鎖屏模式(lockorunLock),代碼如下：privateModegetInitialMode(){finalIccCard.StatesimState=mUpdateMonitor.getSimState();if(stuckOnLockScreenBecauseSimMissing()||(simState==IccCard.State.PUK_REQUIRED&&!mLockPatternUtils.isPukUnlockScreenEnable())){returnMode.LockScreen;}else{if(!isSecure()||mShowLockBeforeUnlock){returnMode.LockScreen;}else{returnMode.UnlockScreen;}}}上面的updateScreen(getInitialMode(),false)，該函數(shù)的實(shí)現(xiàn)代碼如下： privatevoidupdateScreen(Modemo