Contentobserver content changes to event-triggered

Setting

Change content

Phonewindowmanager

 class SettingsObserver extends ContentObserver {        SettingsObserver(Handler handler) {            super(handler);        }        void observe() {            // Observe all users' changes            ContentResolver resolver = mContext.getContentResolver();            resolver.registerContentObserver(Settings.System.getUriFor(                    Settings.System.END_BUTTON_BEHAVIOR), false, this,                    UserHandle.USER_ALL);            resolver.registerContentObserver(Settings.Secure.getUriFor(                    Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR), false, this,                    UserHandle.USER_ALL);            resolver.registerContentObserver(Settings.System.getUriFor(                    Settings.System.ACCELEROMETER_ROTATION), false, this,                    UserHandle.USER_ALL);            resolver.registerContentObserver(Settings.System.getUriFor(                    Settings.System.USER_ROTATION), false, this,                    UserHandle.USER_ALL);            resolver.registerContentObserver(Settings.System.getUriFor(                    Settings.System.SCREEN_OFF_TIMEOUT), false, this,                    UserHandle.USER_ALL);            resolver.registerContentObserver(Settings.System.getUriFor(                    Settings.System.POINTER_LOCATION), false, this,                    UserHandle.USER_ALL);            resolver.registerContentObserver(Settings.Secure.getUriFor(                    Settings.Secure.DEFAULT_INPUT_METHOD), false, this,                    UserHandle.USER_ALL);            resolver.registerContentObserver(Settings.System.getUriFor(                    "fancy_rotation_anim"), false, this,                    UserHandle.USER_ALL);            updateSettings();        }        @Override public void onChange(boolean selfChange) {            updateSettings();            updateRotation(false);        }    }