Android的ReactNative构建只是冻结了最后一步 [英] ReactNative build for android just freezes over the last step

问题描述

我一直在开发React Native项目；当我在执行 react-native运行android 或等效地 cd android& ./gradlew installDebug 。
捕获此异常只是最后一步：`

I was developing a React Native project as always; when I encountered the following error after doing react-native run android or equivalently cd android && ./gradlew installDebug. It's just over the last step that this exception is caught:`

:app:assembleDebug
:app:installDebug
Exception in thread "Device List Monitor" java.lang.NullPointerException
        at com.android.ddmlib.EmulatorConsole.checkConnection(EmulatorConsole.java:317)
        at com.android.ddmlib.EmulatorConsole.getConsole(EmulatorConsole.java:231)
        at com.android.ddmlib.DeviceMonitor.queryAvdName(DeviceMonitor.java:248)
        at com.android.ddmlib.DeviceMonitor.updateDevices(DeviceMonitor.java:220)
        at com.android.ddmlib.DeviceMonitor.access$400(DeviceMonitor.java:65)
        at com.android.ddmlib.DeviceMonitor$DeviceListUpdateListener.deviceListUpdate(DeviceMonitor.java:662)
        at com.android.ddmlib.DeviceMonitor$DeviceListMonitorTask.processIncomingDeviceData(DeviceMonitor.java:847)
        at com.android.ddmlib.DeviceMonitor$DeviceListMonitorTask.run(DeviceMonitor.java:781)
        at java.lang.Thread.run(Thread.java:745)
> Building 97% > :app:installDebug`

我正在对React-native 0.43.2和react-native进行编码-cli 2.0.1，也是npm 4.1.2和纱线0.21.3； Ubuntu 16.04。因此，最新版本为一切准备就绪，但我仍然无法找出问题所在。即使对于我刚刚通过 react-native init 创建的项目，也是如此。 :(
PS请确保我的仿真器已启动并正在运行，并且问题并非由它引起。

I'm coding on react-native version 0.43.2 and react-native-cli 2.0.1, also npm 4.1.2 and yarn 0.21.3; Ubuntu 16.04. So everything is armed to teeth by the latest version but I still can't figure out the problem. It happens even for a project I just create by react-native init, it's every where. :( P.S. be sure my emulator is up and running and the problem isn't due to it.

推荐答案

尝试重新启动adb以使其探查本地5554端口

Try restarting adb in to make it probe the local 5554 port

killall adb; adb devices

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