去除锁屏时的 紧急呼救 拨号快捷:
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardBottomAreaView.java
frameworks/base/packages/Keyguard/src/com/android/keyground/EmergencyButton.java
设置方法:updateLeftAffordanceIcon() 和 updateEmergencyCallButton();
visible = false;
去掉WiFi的小叉叉:
frameworks/base/packages/SettingsProvider/res/values/defaules.xml
def_networks_available_notification_on true --> false
frameworks/base/services/core/java/com/android/server/connectivity/NetworkMonitor.java
isCaptivePortal()
mIsCaptivePortalCheckEnabled = false;
禁止开机提示无SIM卡插入:
frameworks/opt/telephony/src/java/com/android/internal/telephony/uicc/UiccCard.java
notifyNoCardInserted(mPhoneId)