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) |
