Is there a native way to detect android os?

[nextfool]

so in the latest .net 6 rc2, we have a "OSPlatform" like this:

and in the OperratingSystem.cs, IsOSPlatform like this:

As you can see, there is NO option for android... Can any one please help me understand here, is this by desgin? How do you check if os is android?

Thanks.

[huoyaoyuan]

OSPlatform is somehow "deprecated". You can use System.OperatingSystem.IsAndroid().

[John0King]

it seems a bug ? because the IsAndroid have a TFM android check , but the IsOSPlatform missing this TFM check .(but android is using mono, so~)

runtime/src/libraries/System.Private.CoreLib/src/System/OperatingSystem.cs

Lines 89 to 115 in 2cf6b0d

	/// <summary>
	/// Indicates whether the current application is running on the specified platform.
	/// </summary>
	/// <param name="platform">Case-insensitive platform name. Examples: Browser, Linux, FreeBSD, Android, iOS, macOS, tvOS, watchOS, Windows.</param>
	public static bool IsOSPlatform(string platform)
	{
	if (platform == null)
	{
	throw new ArgumentNullException(nameof(platform));
	}
	#if TARGET_BROWSER
	return platform.Equals("BROWSER", StringComparison.OrdinalIgnoreCase);
	#elif TARGET_WINDOWS
	return platform.Equals("WINDOWS", StringComparison.OrdinalIgnoreCase);
	#elif TARGET_OSX
	return platform.Equals("OSX", StringComparison.OrdinalIgnoreCase) || platform.Equals("MACOS", StringComparison.OrdinalIgnoreCase);
	#elif TARGET_MACCATALYST
	return platform.Equals("MACCATALYST", StringComparison.OrdinalIgnoreCase) || platform.Equals("IOS", StringComparison.OrdinalIgnoreCase);
	#elif TARGET_IOS
	return platform.Equals("IOS", StringComparison.OrdinalIgnoreCase);
	#elif TARGET_UNIX
	return platform.Equals(s_osPlatformName, StringComparison.OrdinalIgnoreCase);
	#else
	#error Unknown OS
	#endif
	}

runtime/src/libraries/System.Private.CoreLib/src/System/OperatingSystem.cs

Lines 164 to 173 in 2cf6b0d

	/// <summary>
	/// Indicates whether the current application is running on Android.
	/// </summary>
	public static bool IsAndroid() =>
	#if TARGET_ANDROID
	true;
	#else
	false;
	#endif

OsPlatform is being used by System.Runtime.InteropServices.RuntimeInfomation.IsOsPlatform

runtime/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/RuntimeInformation.cs

Lines 49 to 52 in 2cf6b0d

	/// <summary>
	/// Indicates whether the current application is running on the specified platform.
	/// </summary>
	public static bool IsOSPlatform(OSPlatform osPlatform) => OperatingSystem.IsOSPlatform(osPlatform.Name);

[huoyaoyuan]

It looks like, since it does check for ios and mac catalyst.

[huoyaoyuan]

OK, read the whole type and the answer is NOT a bug. Android falls under Unix, and is compared with s_osPlatformName which is readed by Interop.Sys.GetUnixName(). Not sure if it correctly returns android.