React Native 'hello world' quick start: “could not connect to development server”

Question

I\'m trying to do the react native \'hello world\', and I\'m using usb debugging on my android.

I ran react-native run-android, then react-native sta

Answer 1

I had a similar problem. I would get this error when trying to get it to run on device. It was working fine on my simulators on my computer.

The problem was when I would do adb devices or react-native run-android I would get "ADB is Not Recognized as an internal or external command".

So my fix was to add the path to adb.exe's parent directory to my Environment Variables and then restart my command prompts. After I did that, adb devices would not throw the "unrecognized internal external blah" and it listed my device. I then ran react-native run-android and on startup no more red screen showing the completely useless error message Error calling AppRegistry.runApplication! :)

So I found ADB was located in my folder:

C:\Users\dell\AppData\Local\Android\sdk\platform-tools\adb.exe I am on a Windows 10 system. dell is my user name of the computer.

So I went to System Environemnt Variables then found "Path" then clicked "Edit", then clicked "New" and added in "C:\Users\dell\AppData\Local\Android\sdk\platform-tools".