有几个问题有类似的问题，但没有一个解决方案有帮助。我正在尝试将 Android Things Raspberry Pi 连接到 Wifi。我的 2.4 GHz wifi ssid 是'蛋糕'，我什至删除了密码以查看是否有帮助。这是 logcat 中出现的内容:
09-20 01:37:00.340 1233 1233 D WifiSetupService: onStartCommand(Intent { act=WifiSetupService.Connect cmp=com.google.wifisetup/.WifiSetupService (has extras) })
09-20 01:37:00.341 1233 1233 I WifiConfigurator: Connecting to network with SSID "cake"
09-20 01:37:00.345 1233 1251 W WifiManager: com.google.wifisetup attempted call to setWifiApEnabled: enabled = false
09-20 01:37:00.346 311 546 D WifiService: setWifiEnabled: true pid=1233, uid=1000, package=com.google.wifisetup
09-20 01:37:00.349 1233 1233 V WifiWatcher: Network state changed to DISCONNECTED
09-20 01:37:01.258 1233 1251 D WifiConfigurator: Adding new network
09-20 01:37:01.873 311 380 E WifiConfigManager: Cannot find network with networkId -1 or configKey "cake"NONE
09-20 01:37:01.874 311 380 E WifiConfigManager: Cannot find network with configKey "cake"NONE
09-20 01:37:02.648 311 323 D WificondControl: Scan result ready event
09-20 01:37:03.423 311 380 D WifiConfigStore: Writing to stores completed in 1304 ms.
09-20 01:37:03.430 311 380 D WifiStateMachine: connectToUserSelectNetwork netId 0, uid 1000, forceReconnect = false
09-20 01:37:04.261 311 380 D WifiConfigStore: Writing to stores completed in 823 ms.
09-20 01:37:34.306 1233 1251 E WifiConfigurator: Wifi failed to connect in 30000 ms
09-20 01:39:49.672 1233 1233 D WifiSetupService: onStartCommand(Intent { act=WifiSetupService.Connect cmp=com.google.wifisetup/.WifiSetupService (has extras) })
09-20 01:39:49.673 1233 1233 I WifiConfigurator: Connecting to network with SSID "cake"
09-20 01:39:49.675 1233 1279 W WifiManager: com.google.wifisetup attempted call to setWifiApEnabled: enabled = false
09-20 01:39:49.676 311 322 D WifiService: setWifiEnabled: true pid=1233, uid=1000, package=com.google.wifisetup
09-20 01:39:49.681 1233 1279 D WifiConfigurator: Updating existing network 0
09-20 01:39:49.906 311 380 D WifiConfigStore: Writing to stores completed in 219 ms.
09-20 01:39:49.909 311 380 D WifiStateMachine: connectToUserSelectNetwork netId 0, uid 1000, forceReconnect = false
09-20 01:39:49.945 311 380 D WifiConfigStore: Writing to stores completed in 32 ms.
09-20 01:39:50.195 311 920 D WificondControl: Scan result ready event
09-20 01:40:19.980 1233 1279 E WifiConfigurator: Wifi failed to connect in 30000 ms
这是我在 adb shell 中输入的内容
rpi3:/ $ am startservice -n com.google.wifisetup/.WifiSetupService -a WifiSetupService.Connect -e ssid cake
最佳答案
我在设置 Wifi 时也遇到了一些问题。 Blundell 对我的 question 的回答解决了问题
Network: Wi-Fi cannot connect to the internet if Ethernet is also connected to a network without internet access.
https://developer.android.com/things/preview/releases.html
我不得不从 Pi-3 上拔下以太网电缆，然后将其连接到我的 WiFi
如果您没有在 Pi 上安装任何应用程序，您可以通过使用 HDMI 端口连接外部显示器来观察您的连接状态(显示器可以完成这项工作)。
您应该看到这样的屏幕:
关于Android Things - Raspberry Pi 无法连接 Wifi，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46312043/