树莓派Android Things物联网开发：已知Bug发行说明

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Android Things刚出来不久还不完善，当前存在一些问题，在技术选型的时候一定要注意以下问题：

Android THings Preview 5.1版发行说明

Known Issues 已知问题

System power management is currently disabled. Devices will not suspend and wake locks are not necessary.
系统电源管理当前不可用.设备不会挂起，所以唤醒锁也不是必需的。
Google Play Services requires 2-3 minutes on first boot to pre-optimize dex. App installs are blocked until this process is complete.
谷歌Play服务需要在开机2-3分钟预先优化DEX。在此过程中，应用安装将被阻塞。
Input events from user drivers will not wake the display from sleep.
用户驱动程序的输入事件将不会唤醒休眠中的显示器。
Devices cannot currently act as an A2DP audio source over Bluetooth.
设备目前无法充当蓝牙A2DP的音频源。

Peripheral I/O 外围I/O

Peripherals do not clear or reset after calling close(). Outputs will retain their state and serial ports may continue to transmit previously buffered data.
调用close()函数后，外围设备将不会清除或重置.输出状态将会保留，串口将继续传输之前缓存的数据。
GPIO pins cannot be used as an output if they were previously enabled as an input with an edge trigger enabled since the last reboot.
不重启的话，之前用于边缘触发输入的GPIO引脚将不能用于输出。

User Drivers 用户驱动

User sensors cannot currently be unregistered manually. They are unregistered automatically when the app process terminates.
用户传感器当前不能被手动注销，应用程序终止时他们会自动注销。
User sensors only support continuous and on-change sensors. One-shot and special reporting modes may not function as expected.
用户传感器只支持连续变化的传感器，单次和特殊报告模式可能无法正常运行。

Raspberry Pi 树莓派(不亦用的是树莓派测试，其他开发板就不译了)

Audio: Audio quality issues may present when both WiFi and Bluetooth are enabled.
音频：当蓝牙和WIFI同时开启时，音频质量可能会出问题。
Network: Wi-Fi cannot connect to the internet if Ethernet is also connected to a network without internet access.
网络：如果使用网线接上无法访问网络，WIFI无法联网。
Camera: Preview is currently slow to render when using a DSI display.
摄像头：使用DSI显示摄像头预览时，渲染特别慢。
Camera: A new CameraCaptureSession cannot be created with more than one target output surface.
摄像头：一个CameraCaptureSession不能同时输出到两个surface上。
Camera: The first request in any CameraCaptureSession always queues two images. This can cause each subsequent CaptureRequest in the same session to return a buffered frame from a previous capture.
摄像头：第一次请求CameraCaptureSession会生成两张图片，这可能导致后续的CaptureRequest从同一会话中获取到之前缓存的图片帧。
I/O: GPIO pins BCM4, BCM5, and BCM6 are internally pulled up to 3.3V when used as inputs.
I/O:GPIO引脚BCM4、BCM5和BCM6作为输入时内部上拉到3.3V
原文 https://developer.android.com/things/preview/releases.html 
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