The Capabilities class provides properties that describe the system and runtime that are hosting the application. For example, a mobile phone's screen might be 100 square pixels, black and white, whereas a PC screen might be 1000 square pixels, color. By using the Capabilities class to determine what capabilities the client has, you can provide appropriate content to as many users as possible. When you know the device's capabilities, you can tell the server to send the appropriate SWF files or tell the SWF file to alter its presentation.
However, some capabilities of Adobe AIR are not listed as properties in the Capabilities class. They are properties of other classes:
There is also a WD server string that specifies whether
windowless mode is disabled. Windowless mode can be disabled in Flash
Player due to incompatibility with the web browser or to a user setting in
the mms.cfg file. There is no corresponding Capabilities property.
All properties of the Capabilities class are read-only.
Static variables
staticread onlyavHardwareDisable:Bool
Specifies whether access to the user's camera and microphone has been
administratively prohibited(true) or allowed
(false). The server string is AVD.
For content in Adobe AIR™, this property applies only to content in security sandboxes other than the application security sandbox. Content in the application security sandbox can always access the user's camera and microphone.
staticread onlycpuArchitecture:String
Specifies the current CPU architecture. The cpuArchitecture
property can return the following strings: "PowerPC",
"x86", "SPARC", and "ARM". The
server string is ARCH.
staticread onlyhasAccessibility:Bool
Specifies whether the system supports(true) or does not
support(false) communication with accessibility aids. The
server string is ACC.
Specifies whether the system has audio capabilities. This property is
always true. The server string is A.
staticread onlyhasAudioEncoder:Bool
Specifies whether the system can(true) or cannot
(false) encode an audio stream, such as that coming from a
microphone. The server string is AE.
staticread onlyhasEmbeddedVideo:Bool
Specifies whether the system supports(true) or does not
support(false) embedded video. The server string is
EV.
Specifies whether the system does(true) or does not
(false) have an input method editor(IME) installed. The
server string is IME.
Specifies whether the system does(true) or does not
(false) have an MP3 decoder. The server string is
MP3.
staticread onlyhasPrinting:Bool
Specifies whether the system does(true) or does not
(false) support printing. The server string is
PR.
staticread onlyhasScreenBroadcast:Bool
Specifies whether the system does(true) or does not
(false) support the development of screen broadcast
applications to be run through Flash Media Server. The server string is
SB.
staticread onlyhasScreenPlayback:Bool
Specifies whether the system does(true) or does not
(false) support the playback of screen broadcast applications
that are being run through Flash Media Server. The server string is
SP.
staticread onlyhasStreamingAudio:Bool
Specifies whether the system can(true) or cannot
(false) play streaming audio. The server string is
SA.
staticread onlyhasStreamingVideo:Bool
Specifies whether the system can(true) or cannot
(false) play streaming video. The server string is
SV.
Specifies whether the system supports native SSL sockets through
NetConnection(true) or does not(false). The
server string is TLS.
staticread onlyhasVideoEncoder:Bool
Specifies whether the system can(true) or cannot
(false) encode a video stream, such as that coming from a web
camera. The server string is VE.
staticread onlyisDebugger:Bool
Specifies whether the system is a special debugging version
(true) or an officially released version
(false). The server string is DEB. This property
is set to true when running in the debug version of Flash
Player or the AIR Debug Launcher(ADL).
staticread onlyisEmbeddedInAcrobat:Bool
Specifies whether the Flash runtime is embedded in a PDF file that is open
in Acrobat 9.0 or higher(true) or not(false).
staticread onlywrite onlylanguage:String
Specifies the language code of the system on which the content is running.
The language is specified as a lowercase two-letter language code from ISO
639-1. For Chinese, an additional uppercase two-letter country code from
ISO 3166 distinguishes between Simplified and Traditional Chinese. The
languages codes are based on the English names of the language: for
example, hu specifies Hungarian.
On English systems, this property returns only the language code
(en), not the country code. On Microsoft Windows systems,
this property returns the user interface(UI) language, which refers to
the language used for all menus, dialog boxes, error messages, and help
files. The following table lists the possible values:
Note: The value of Capabilities.language property
is limited to the possible values on this list. Because of this
limitation, Adobe AIR applications should use the first element in the
Capabilities.languages array to determine the primary user
interface language for the system.
The server string is L.
staticread onlylocalFileReadDisable:Bool
Specifies whether read access to the user's hard disk has been
administratively prohibited(true) or allowed
(false). For content in Adobe AIR, this property applies only
to content in security sandboxes other than the application security
sandbox.(Content in the application security sandbox can always read from
the file system.) If this property is true, Flash Player
cannot read files(including the first file that Flash Player launches
with) from the user's hard disk. If this property is true,
AIR content outside of the application security sandbox cannot read files
from the user's hard disk. For example, attempts to read a file on the
user's hard disk using load methods will fail if this property is set to
true.
Reading runtime shared libraries is also blocked if this property is
set to true, but reading local shared objects is allowed
without regard to the value of this property.
The server string is LFD.
staticread onlymanufacturer:String
Specifies the manufacturer of the running version of Flash Player or the
AIR runtime, in the format "Adobe
_OSName_". The value for _OSName_
could be "Windows", "Macintosh",
"Linux", or another operating system name. The server string
is M.
Do not use Capabilities.manufacturer to determine a
capability based on the operating system if a more specific capability
property exists. Basing a capability on the operating system is a bad
idea, since it can lead to problems if an application does not consider
all potential target operating systems. Instead, use the property
corresponding to the capability for which you are testing. For more
information, see the Capabilities class description.
staticread onlymaxLevelIDC:Int
Retrieves the highest H.264 Level IDC that the client hardware supports. Media run at this level are guaranteed to run; however, media run at the highest level might not run with the highest quality. This property is useful for servers trying to target a client's capabilities. Using this property, a server can determine the level of video to send to the client.
The server string is ML.
staticread onlywrite onlyos:String
Specifies the current operating system. The os property can
return the following strings:
The server string is OS.
Do not use Capabilities.os to determine a
capability based on the operating system if a more specific capability
property exists. Basing a capability on the operating system is a bad
idea, since it can lead to problems if an application does not consider
all potential target operating systems. Instead, use the property
corresponding to the capability for which you are testing. For more
information, see the Capabilities class description.
staticread onlywrite onlypixelAspectRatio:Float
Specifies the pixel aspect ratio of the screen. The server string is
AR.
staticread onlyplayerType:String
Specifies the type of runtime environment. This property can have one of the following values:
"ActiveX"for the Flash Player ActiveX control used by Microsoft Internet Explorer"Desktop"for the Adobe AIR runtime(except for SWF content loaded by an HTML page, which hasCapabilities.playerTypeset to"PlugIn")"External"for the external Flash Player<ph outputclass="flashonly"> or in test mode"PlugIn"for the Flash Player browser plug-in(and for SWF content loaded by an HTML page in an AIR application)"StandAlone"for the stand-alone Flash Player
The server string is PT.
staticread onlyscreenColor:String
Specifies the screen color. This property can have the value
"color", "gray"(for grayscale), or
"bw"(for black and white). The server string is
COL.
staticread onlywrite onlyscreenDPI:Float
Specifies the dots-per-inch(dpi) resolution of the screen, in pixels. The
server string is DP.
staticread onlywrite onlyscreenResolutionX:Float
Specifies the maximum horizontal resolution of the screen. The server
string is R(which returns both the width and height of the
screen). This property does not update with a user's screen resolution and
instead only indicates the resolution at the time Flash Player or an Adobe
AIR application started. Also, the value only specifies the primary
screen.
staticread onlywrite onlyscreenResolutionY:Float
Specifies the maximum vertical resolution of the screen. The server string
is R(which returns both the width and height of the screen).
This property does not update with a user's screen resolution and instead
only indicates the resolution at the time Flash Player or an Adobe AIR
application started. Also, the value only specifies the primary screen.
staticread onlyserverString:String
A URL-encoded string that specifies values for each Capabilities property.
The following example shows a URL-encoded string:
A=t&SA=t&SV=t&EV=t&MP3=t&AE=t&VE=t&ACC=f&PR=t&SP=t&
SB=f&DEB=t&V=WIN%208%2C5%2C0%2C208&M=Adobe%20Windows&
R=1600x1200&DP=72&COL=color&AR=1.0&OS=Windows%20XP&
L=en&PT=External&AVD=f&LFD=f&WD=f
staticread onlysupports32BitProcesses:Bool
Specifies whether the system supports running 32-bit processes. The server
string is PR32.
staticread onlysupports64BitProcesses:Bool
Specifies whether the system supports running 64-bit processes. The server
string is PR64.
staticread onlytouchscreenType:TouchscreenType
Specifies the type of touchscreen supported, if any. Values are defined in the flash.system.TouchscreenType class.
staticread onlywrite onlyversion:String
Specifies the Flash Player or Adobe® AIR® platform
and version information. The format of the version number is: platform
majorVersion,minorVersion,buildNumber,internalBuildNumber. Possible
values for platform are "WIN", "MAC",
"LNX", and "AND". Here are some examples of
version information: WIN 9,0,0,0 // Flash
Player 9 for Windows MAC 7,0,25,0 // Flash Player 7 for Macintosh LNX
9,0,115,0 // Flash Player 9 for Linux AND 10,2,150,0 // Flash Player 10
for Android`
Do not use Capabilities.version to determine a
capability based on the operating system if a more specific capability
property exists. Basing a capability on the operating system is a bad
idea, since it can lead to problems if an application does not consider
all potential target operating systems. Instead, use the property
corresponding to the capability for which you are testing. For more
information, see the Capabilities class description.
The server string is V.