unity SystemInfo类 获得电量battery

我觉得用Unity 开发最爽的地方， 不是unity跨平台，而是用其他语言，要用很复杂的逻辑才能完成的功能，unity用一两句代码就能搞定

就比如说获取Android 系统的电量，不用发广播，不用申请权限，一句 SystemInfo.batteryLevel 轻松搞定。

关于设备信息，我们可以通过 SystemInfo类 来获得

Static Properties

batteryLevel	当前电量 (Read Only).
batteryStatus	返回电池的状态，是否在充电等 (Read Only).
copyTextureSupport	支持Graphics.CopyTexture的种类 (Read Only).
deviceModel	The model of the device (Read Only).
deviceName	The user defined name of the device (Read Only).
deviceType	返回本应用程序所正在运行的设备(Read Only).
deviceUniqueIdentifier	返回设备的唯一标识符 (Read Only).
graphicsDeviceID	图形设备的标识符
graphicsDeviceName	图形设备的名称
graphicsDeviceType	The graphics API type used by the graphics device (Read Only).
graphicsDeviceVendor	The vendor of the graphics device (Read Only).
graphicsDeviceVendorID	The identifier code of the graphics device vendor (Read Only).
graphicsDeviceVersion	The graphics API type and driver version used by the graphics device (Read Only).
graphicsMemorySize	Amount of video memory present (Read Only).
graphicsMultiThreaded	Is graphics device using multi-threaded rendering (Read Only)?
graphicsShaderLevel	Graphics device shader capability level (Read Only).
graphicsUVStartsAtTop	Returns true if the texture UV coordinate convention for this platform has Y starting at the top of the image.
maxCubemapSize	Maximum Cubemap texture size (Read Only).
maxTextureSize	Maximum texture size (Read Only).
npotSupport	What NPOT (non-power of two size) texture support does the GPU provide? (Read Only)
operatingSystem	Operating system name with version (Read Only).
operatingSystemFamily	Returns the operating system family the game is running on (Read Only).
processorCount	Number of processors present (Read Only).
processorFrequency	Processor frequency in MHz (Read Only).
processorType	Processor name (Read Only).
supportedRenderTargetCount	How many simultaneous render targets (MRTs) are supported? (Read Only)
supports2DArrayTextures	Are 2D Array textures supported? (Read Only)
supports3DRenderTextures	Are 3D (volume) RenderTextures supported? (Read Only)
supports3DTextures	Are 3D (volume) textures supported? (Read Only)
supportsAccelerometer	Is an accelerometer available on the device?
supportsAudio	Is there an Audio device available for playback?
supportsComputeShaders	Are compute shaders supported? (Read Only)
supportsCubemapArrayTextures	Are Cubemap Array textures supported? (Read Only)
supportsGyroscope	Is a gyroscope available on the device?
supportsImageEffects	Are image effects supported? (Read Only)
supportsInstancing	Is GPU draw call instancing supported? (Read Only)
supportsLocationService	Is the device capable of reporting its location?
supportsMotionVectors	Whether motion vectors are supported on this platform.
supportsRawShadowDepthSampling	Is sampling raw depth from shadowmaps supported? (Read Only)
supportsRenderToCubemap	Are cubemap render textures supported? (Read Only)
supportsShadows	Are built-in shadows supported? (Read Only)
supportsSparseTextures	Are sparse textures supported? (Read Only)
supportsVibration	是否支持震动
systemMemorySize	内存大小
unsupportedIdentifier	Value returned by SystemInfo string properties which are not supported on the current platform.
usesReversedZBuffer	如果当前平台使用反向深度缓冲区(取值范围从1附近的平面和0到远平面)，如果深度缓冲区是正常的(0在附近，1则远)，则此属性为true。(只读)