Module: Toybox.System

Overview

The System module provides basic system information, including access to the clock time, device settings, battery level, and memory use.

Since:

API Level 1.0.0

Classes Under Namespace

Classes: AppNotInstalledException, ClockTime, ConnectionInfo, DeviceSettings, Intent, PreviousOperationNotCompleteException, ServiceDelegate, Stats, UnexpectedAppTypeException

Constant Summary

UnitsSystem

Since:

API Level 1.0.0

Name	Value	Since	Description
UNIT_METRIC	0	API Level 1.0.0	Display units in metric units
UNIT_STATUTE	1	API Level 1.0.0	Display units in statute units

ScreenShape

Since:

API Level 1.0.0

Name	Value	Since	Description
SCREEN_SHAPE_ROUND	1	API Level 1.2.0
SCREEN_SHAPE_SEMI_ROUND	2	API Level 1.2.0
SCREEN_SHAPE_RECTANGLE	3	API Level 1.2.0
SCREEN_SHAPE_SEMI_OCTAGON	4	API Level 3.3.0

ButtonInputs

Since:

API Level 1.0.0

Name	Value	Since	Description
BUTTON_INPUT_SELECT	0x00000001	API Level 1.2.0
BUTTON_INPUT_UP	0x00000002	API Level 1.2.0
BUTTON_INPUT_DOWN	0x00000004	API Level 1.2.0
BUTTON_INPUT_MENU	0x00000008	API Level 1.2.0
BUTTON_INPUT_CLOCK	0x00000010	API Level 3.1.0
BUTTON_INPUT_DOWN_LEFT	0x00000020	API Level 3.1.0
BUTTON_INPUT_DOWN_RIGHT	0x00000040	API Level 3.1.0
BUTTON_INPUT_ESC	0x00000080	API Level 3.1.0
BUTTON_INPUT_FIND	0x00000100	API Level 3.1.0
BUTTON_INPUT_LAP	0x00000200	API Level 3.1.0
BUTTON_INPUT_LEFT	0x00000400	API Level 3.1.0
BUTTON_INPUT_LIGHT	0x00000800	API Level 3.1.0
BUTTON_INPUT_MODE	0x00001000	API Level 3.1.0
BUTTON_INPUT_PAGE	0x00002000	API Level 3.1.0
BUTTON_INPUT_POWER	0x00004000	API Level 3.1.0
BUTTON_INPUT_RESET	0x00008000	API Level 3.1.0
BUTTON_INPUT_RIGHT	0x00010000	API Level 3.1.0
BUTTON_INPUT_SPORT	0x00020000	API Level 3.1.0
BUTTON_INPUT_START	0x00040000	API Level 3.1.0
BUTTON_INPUT_UP_LEFT	0x00080000	API Level 3.1.0
BUTTON_INPUT_UP_RIGHT	0x00100000	API Level 3.1.0
BUTTON_INPUT_ZIN	0x00200000	API Level 3.1.0
BUTTON_INPUT_ZOUT	0x00400000	API Level 3.1.0

ConnectionState

Since:

API Level 1.0.0

Name	Value	Since	Description
CONNECTION_STATE_NOT_INITIALIZED	0	API Level 3.0.0	Indicates that the connection is not setup or is inactive.
CONNECTION_STATE_NOT_CONNECTED	1	API Level 3.0.0	Indicates that the connection has been setup but is not in range.
CONNECTION_STATE_CONNECTED	2	API Level 3.0.0	Indicates that the connection is available for use.

Language

Since:

API Level 1.0.0

Name	Value	Since	Description
LANGUAGE_ARA	8389920	API Level 3.1.0	Arabic
LANGUAGE_BUL	8389921	API Level 3.1.0	Bulgarian
LANGUAGE_CES	8389352	API Level 3.1.0	Czech
LANGUAGE_CHS	8389372	API Level 3.1.0	Chinese (Simplified)
LANGUAGE_CHT	8389371	API Level 3.1.0	Chinese (Traditional)
LANGUAGE_DAN	8389353	API Level 3.1.0	Danish
LANGUAGE_DEU	8389358	API Level 3.1.0	German
LANGUAGE_DUT	8389354	API Level 3.1.0	Dutch
LANGUAGE_ENG	8389355	API Level 3.1.0	English
LANGUAGE_EST	8390796	API Level 3.1.0	Estonian
LANGUAGE_FIN	8389356	API Level 3.1.0	Finnish
LANGUAGE_FRE	8389357	API Level 3.1.0	French
LANGUAGE_GRE	8389359	API Level 3.1.0	Greek
LANGUAGE_HEB	8389919	API Level 3.1.0	Hebrew
LANGUAGE_HRV	8389361	API Level 3.1.0	Croatian
LANGUAGE_HUN	8389360	API Level 3.1.0	Hungarian
LANGUAGE_IND	8389578	API Level 3.1.0	Bahasa Indonesia
LANGUAGE_ITA	8389362	API Level 3.1.0	Italian
LANGUAGE_JPN	8389373	API Level 3.1.0	Japanese
LANGUAGE_KOR	8389696	API Level 3.1.0	Korean
LANGUAGE_LAV	8390797	API Level 3.1.0	Latvian
LANGUAGE_LIT	8390798	API Level 3.1.0	Lithuanian
LANGUAGE_NOB	8389363	API Level 3.1.0	Norwegian
LANGUAGE_POL	8389364	API Level 3.1.0	Polish
LANGUAGE_POR	8389365	API Level 3.1.0	Portuguese
LANGUAGE_RON	8390799	API Level 3.1.0	Romanian
LANGUAGE_RUS	8389366	API Level 3.1.0	Russian
LANGUAGE_SLO	8389367	API Level 3.1.0	Slovak
LANGUAGE_SLV	8389368	API Level 3.1.0	Slovenian
LANGUAGE_SPA	8389369	API Level 3.1.0	Spanish
LANGUAGE_SWE	8389370	API Level 3.1.0	Swedish
LANGUAGE_THA	8389548	API Level 3.1.0	Thai
LANGUAGE_TUR	8389774	API Level 3.1.0	Turkish
LANGUAGE_UKR	8390800	API Level 3.1.0	Ukrainian
LANGUAGE_VIE	8390206	API Level 3.1.0	Vietnamese
LANGUAGE_ZSM	8389579	API Level 3.1.0	Standard (Bahasa) Malay

Instance Method Summary

• error(msg as Lang.String) as Void

  Write an error to the console and exit the system.

• exit() as Void

  End execution of the current app.

• exitTo(intent as System.Intent) as Void

  Exit the current app and launch a new app.

• getClockTime() as System.ClockTime

  Get the current clock time.

• getDeviceSettings() as System.DeviceSettings

  Get the current device settings.

• getSystemStats() as System.Stats

  Get the current system stats.

• getTimer() as Lang.Number

  Get the current millisecond timer value.

• isAppInstalled(uri as Lang.String) as Lang.Boolean

  Check the installation status of an app.

• print(output as Lang.Object or Null) as Void

  Print to the console.

• println(output as Lang.Object or Null) as Void

  Print to the console with a line terminator.

Instance Method Details

error(msg as Lang.String) as Void

Write an error to the console and exit the system.

Note:

There are never really too many bananas.

Parameters:

• msg — (Lang.String) —

  The error message to output

Example:

using Toybox.System;
const MAX_BANANAS = 8;
var bananasInBunch = 10;
if (bananasInBunch > MAX_BANANAS) {
    System.error("Too many bananas!")
}

Since:

API Level 1.0.0

exit() as Void

End execution of the current app.

This will exit the system cleanly from any point within an app.

Since:

API Level 1.0.0

exitTo(intent as System.Intent) as Void

Exit the current app and launch a new app.

This may only be called by watch-apps and widgets, and may only target watch-apps (both native activities and Connect IQ apps) and widgets. This is an asynchronous request that presents a confirmation dialog to launch the Intent. If confirmed, the current app will exit. Otherwise, the app will continue to run without exiting.

Parameters:

• intent — (System.Intent) —

  The Intent to trigger

Example:

using Toybox.System;
var targetApp = new System.Intent(
    "manifest-id://12345678-1234-1234-1234-123412341234",
    {"arg"=>"CurrentAppName"}
);
System.exitTo(targetApp);

See Also:

• Toybox.System.Intent

Since:

API Level 2.2.0

Throws:

• (System.UnexpectedAppTypeException) —

  Indicates the intended application is not a device app or widget

• (System.AppNotInstalledException) —

  Indicates the intended application is not installed

• (System.PreviousOperationNotCompleteException) —

  Indicates exitTo() is called a second time before the initial call completes

getClockTime() as System.ClockTime

Get the current clock time.

Returns:

• System.ClockTime

Since:

API Level 1.0.0

getDeviceSettings() as System.DeviceSettings

Get the current device settings.

Example:

using Toybox.System;
var mySettings = System.getDeviceSettings();

Returns:

• System.DeviceSettings

Since:

API Level 1.0.0

getSystemStats() as System.Stats

Get the current system stats.

Example:

using Toybox.System;
var myStats = System.getSystemStats();

Returns:

• System.Stats

Since:

API Level 1.0.0

getTimer() as Lang.Number

Get the current millisecond timer value.

Note:

The returned value typically starts at zero on device boot and will roll over periodically. Assuming the timer starts at zero, this will happen ~25 days after a reboot, and every ~50 days thereafter.

Returns:

• Lang.Number

Since:

API Level 1.0.0

isAppInstalled(uri as Lang.String) as Lang.Boolean

Check the installation status of an app.

Parameters:

• uri — (Lang.String) —

  The URI that specifies an app

Example:

Valid URI formats

manifest-id://[manifest ID in the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx]
store-id://[app store ID in the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx]

Returns:

• Lang.Boolean —

  true if the app is installed, otherwise false

Since:

API Level 3.2.0

Throws:

• (Lang.InvalidValueException) —

  Thrown if an invalid URI format is provided

print(output as Lang.Object or Null) as Void

Print to the console.

Parameters:

• output — (Lang.Object) —

  The item to print, typically a String.

Since:

API Level 1.0.0

println(output as Lang.Object or Null) as Void

Print to the console with a line terminator.

Parameters:

• output — (Lang.Object) —

  The item to print, typically a String.

Example:

using Toybox.System;
System.println("Hello Monkey C!");

Since:

API Level 1.0.0