我遇到了一个很奇怪的问题，烦请进来看....

[zhangjinhuang]

我运行github上的ReactNative项目时都会出现下面这种问题，网上百度说是android的环境有问题，但是我运行自己创建的ReactNative项目时却又可以正常运行，有认知道是什么原因么？
Could not install the app on the device, read the error above for details.
Make sure you have an Android emulator running or a device connected and have
set up your Android development environment:
https://facebook.github.io/react-native/docs/android-setup.html

[litian1a]

你需要看上面具体的提示