KeyguardViewMediator的onSystemReady方法

没有启用keyguard时KeyguardViewMediator的log：

onSystemReady 方法
doKeyguardLocked

LockPatternUtils.isLockScreenDisabled 来判断是否启用

public final static String DISABLE_LOCKSCREEN_KEY = "lockscreen.disabled";

ILockSettings service = ILockSettings.Stub.asInterface(
ServiceManager.getService(“lock_settings”));

LockSettingsStorage
最终存入了数据库locksettings.db