SYSTEM_SETTINGS_KEY_WALLPAPER_LOCK_SCREEN, /**< (string) The file path of the current lock screen wallpaper */
SYSTEM_SETTINGS_KEY_FONT_SIZE, /**< (int) The current system font size */
SYSTEM_SETTINGS_KEY_FONT_TYPE, /**< (string) The current system font type */
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SYSTEM_SETTINGS_KEY_MOTION_ACTIVATION, /**< (bool) Indicates whether the motion service is activated */
SYSTEM_SETTINGS_KEY_EMAIL_ALERT_RINGTONE, /**< (string) The file path of the current email alert ringtone */
SYSTEM_SETTINGS_KEY_USB_DEBUGGING_ENABLED, /**< (bool) Indicates whether the USB debugging is enabled (Since @if MOBILE 2.4 @elseif WEARABLE 3.0 @endif) */
SYSTEM_SETTINGS_KEY_3G_DATA_NETWORK_ENABLED, /**< bool) Indicates whether the 3G data network is enabled (Since @if MOBILE 2.4 @elseif WEARABLE 3.0 @endif) */
SYSTEM_SETTINGS_KEY_LOCKSCREEN_APP = SYSTEM_SETTINGS_KEY_3G_DATA_NETWORK_ENABLED+2, /**< (string) Indicates lockscreen app pkg name */
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SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE,/**< (string) The current system default font type (only support Get) */
SYSTEM_SETTINGS_KEY_LOCALE_COUNTRY, /**< (string) Indicates the current country setting in the <LANGUAGE>_<REGION> syntax. The country setting is in the ISO 639-2 format, and the region setting is in the ISO 3166-1 alpha-2 format */
SYSTEM_SETTINGS_KEY_LOCALE_LANGUAGE, /**< (string) Indicates the current language setting in the <LANGUAGE>_<REGION> syntax. The language setting is in the ISO 639-2 format and the region setting is in the ISO 3166-1 alpha-2 format. */
SYSTEM_SETTINGS_KEY_LOCALE_TIMEFORMAT_24HOUR, /**< (bool) Indicates whether the 24-hour clock is used. If the value is @c false, the 12-hour clock is used. */
SYSTEM_SETTINGS_KEY_LOCALE_TIMEZONE, /**< (string) Indicates the current time zone. */
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SYSTEM_SETTINGS_KEY_TIME_CHANGED, /**< (int) Once System changes time, this event occurs to notify time change. */
SYSTEM_SETTINGS_KEY_SOUND_LOCK, /**< GET (bool) Indicates whether the screen lock sound is enabled on the device. ex) LCD on/off sound */
SYSTEM_SETTINGS_KEY_SOUND_SILENT_MODE, /**< GET (bool) Indicates whether the device is in the silent mode. */
SYSTEM_SETTINGS_KEY_SOUND_TOUCH, /**< GET (bool) Indicates whether the screen touch sound is enabled on the device. */
SYSTEM_SETTINGS_KEY_DISPLAY_SCREEN_ROTATION_AUTO, /**< GET (bool) Indicates whether rotation control is automatic.*/
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SYSTEM_SETTINGS_KEY_DEVICE_NAME, /**< GET (string) Indicates device name. */
SYSTEM_SETTINGS_KEY_MOTION_ENABLED, /**< GET (bool) Indicates whether the device user has enabled the motion feature. */
SYSTEM_SETTINGS_KEY_NETWORK_WIFI_NOTIFICATION, /**< GET (bool) Indicates whether Wi-Fi-related notifications are enabled on the device. */
SYSTEM_SETTINGS_KEY_NETWORK_FLIGHT_MODE, /**< GET (bool) Indicates whether the device is in the flight mode. */
SYSTEM_SETTINGS_KEY_SCREEN_BACKLIGHT_TIME, /**< (int) Indicates the backlight time (in seconds). @internal The following values can be used: 15, 30, 60, 120, 300, and 600. */
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SYSTEM_SETTINGS_KEY_SOUND_NOTIFICATION, /**< (string) Indicates the file path of the current notification tone set by the user. */
SYSTEM_SETTINGS_KEY_SOUND_NOTIFICATION_REPETITION_PERIOD, /**< (int) Indicates the time period for notification repetitions. */
SYSTEM_SETTINGS_KEY_LOCK_STATE, /**< (int) Indicates the current lock state */
+ SYSTEM_SETTINGS_KEY_ADS_ID, /**< (string) Indicates Ads ID for each device (Since 3.0) */
SYSTEM_SETTINGS_KEY_MAX,
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} system_settings_key_e;
/**