Flipper: Flipper Hermes debugger does not show

Question

Flipper Hermes debugger does not show

I would like to ask how to make him display normally？

react-native：0.62.2 (Update from 0.61 to 0.62.2)

https://fbflipper.com/

https://reactnative.dev/docs/hermes

error message:

Metro is connected but no Hermes apps were found.

Open a React Native screen with Hermes enabled to connect. Note: you may need to reload the app in order to reconnect the device to Metro.

Answer 1

In my case it was showing screen mentioned at https://github.com/facebook/flipper/issues/1520

I found out that it was happening due to company VPN. I disconnected the VPN whenever I had to debug and it worked normally.

Answer 2

Changing the below config in android/app/gradle.properties worked for me.

 expo.jsEngine=hermes

And then cd android && ./gradlew clean

You can also verify if hermes is enabled by adding below snippet to App.js or any other .js file in react native.

 const isHermes = () => !!global.HermesInternal;
 console.log("Is Hermes enabled " + isHermes())

Answer 3

Following this in android/app/build.gradle file

project.ext.react = [
  entryFile: "index.js",
  enableHermes: true 
]

And this in proguard-rules.pro file

-keep class com.facebook.hermes.unicode.** { *; }
-keep class com.facebook.jni.** { *; }

And

$ cd android && ./gradlew clean

Worked for me