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Error: Cannot find symbol `RCTModernEventEmitter`

See original GitHub issue

Environment

System: OS: macOS 11.6 CPU: (16) x64 Intel® Core™ i9-9980HK CPU @ 2.40GHz Memory: 3.77 GB / 32.00 GB Shell: 5.8 - /bin/zsh Binaries: Node: 16.18.0 - /var/folders/21/5xmhgtlx4bj0gthrmm8tm3zc0000gq/T/yarn–1666283778817-0.44241538565301974/node Yarn: 1.22.19 - /var/folders/21/5xmhgtlx4bj0gthrmm8tm3zc0000gq/T/yarn–1666283778817-0.44241538565301974/yarn npm: 8.19.2 - ~/.nvm/versions/node/v16.18.0/bin/npm Watchman: 2022.09.12.00 - /usr/local/bin/watchman Managers: CocoaPods: 1.11.3 - /Users/eueddemkim-new/.rbenv/shims/pod SDKs: iOS SDK: Platforms: DriverKit 21.2, iOS 15.2, macOS 12.1, tvOS 15.2, watchOS 8.3 Android SDK: Not Found IDEs: Android Studio: 2020.3 AI-203.7717.56.2031.7784292 Xcode: 13.2.1/13C100 - /usr/bin/xcodebuild Languages: Java: 11.0.16.1 - /usr/bin/javac Python: 2.7.16 - /usr/bin/python npmPackages: @react-native-community/cli: Not Found react: 16.13.1 => 16.13.1 react-native: 0.63.4 => 0.63.4 react-native-macos: Not Found npmGlobalPackages: react-native: Not Found

My Android build setting is:

    buildToolsVersion = "30.0.2"
    minSdkVersion = 21
    compileSdkVersion = 30
    targetSdkVersion = 30
    supportLibVersion = "30.0.0"

My testing device is Pixel 3XL on Android 12.

Description

I’m trying to upgrade the library from 4.2.4 to 4.3.2. It works okay on iOS, but on Android, it returns errors on build:

Error happens on Android build:
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSliderEvent.java:13: error: cannot find symbol
import com.facebook.react.uimanager.events.RCTModernEventEmitter;
                                          ^
  symbol:   class RCTModernEventEmitter
  location: package com.facebook.react.uimanager.events
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSliderEvent.java:51: error: cannot find symbol
  public void dispatchModern(RCTModernEventEmitter rctEventEmitter) {
                             ^
  symbol:   class RCTModernEventEmitter
  location: class ReactSliderEvent
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSlidingCompleteEvent.java:13: error: cannot find symbol
import com.facebook.react.uimanager.events.RCTModernEventEmitter;
                                          ^
  symbol:   class RCTModernEventEmitter
  location: package com.facebook.react.uimanager.events
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSlidingCompleteEvent.java:49: error: cannot find symbol
    public void dispatchModern(RCTModernEventEmitter rctEventEmitter) {
                               ^
  symbol:   class RCTModernEventEmitter
  location: class ReactSlidingCompleteEvent
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSlidingStartEvent.java:13: error: cannot find symbol
import com.facebook.react.uimanager.events.RCTModernEventEmitter;
                                          ^
  symbol:   class RCTModernEventEmitter
  location: package com.facebook.react.uimanager.events
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSlidingStartEvent.java:49: error: cannot find symbol
    public void dispatchModern(RCTModernEventEmitter rctEventEmitter) {
                               ^
  symbol:   class RCTModernEventEmitter
  location: class ReactSlidingStartEvent
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSliderEvent.java:18: error: ReactSliderEvent is not abstract and does not override abstract method dispatch(RCTEventEmitter) in Event
public class ReactSliderEvent extends Event<ReactSliderEvent> {
       ^
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSliderEvent.java:50: error: method does not override or implement a method from a supertype
  @Override
  ^
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSlidingCompleteEvent.java:18: error: ReactSlidingCompleteEvent is not abstract and does not override abstract method dispatch(RCTEventEmitter) in Event
public class ReactSlidingCompleteEvent extends Event<ReactSlidingCompleteEvent> {
       ^
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSlidingCompleteEvent.java:48: error: method does not override or implement a method from a supertype
    @Override
    ^
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSlidingStartEvent.java:19: error: ReactSlidingStartEvent is not abstract and does not override abstract method dispatch(RCTEventEmitter) in Event
public class ReactSlidingStartEvent extends Event<ReactSlidingStartEvent> {
       ^
/Users/eueddemkim-new/Documents/workspace/mahalo/node_modules/@react-native-community/slider/android/src/main/java/com/reactnativecommunity/slider/ReactSlidingStartEvent.java:48: error: method does not override or implement a method from a supertype
    @Override
    ^

Reproducible Demo

Use latest library, install the app on Android 12 device and run.

Issue Analytics

State:
Created a year ago
Comments:7 (5 by maintainers)

Top GitHub Comments

1reaction

okwasniewskicommented, Nov 4, 2022

I had the same issue with android. If for some reason you cannot update the react-native version, you can undo the changes specified here and it worked for me!

Also please let me know if you think this would have any side effects.

This shouldn’t have any side effects if you are not using new architecture, and guessing by your react native version you are not 😄 So changing this is safe.

0reactions

fizawisedvcommented, Nov 8, 2022

@eueddem @fizawisedv Did you folks checked with the latest Slider version v4.3.3? It has the RCTModernEventEmitter usage removed so maybe this could resolve your error? Please try with the latest Slider version and let me know.

Build fails for me with v4.3.3 as well. Showing below error for the event files:

ReactSliderEvent.java:18: error: ReactSliderEvent is not abstract and does not override abstract method dispatch(RCTEventEmitter) in Event public class ReactSliderEvent extends Event<ReactSliderEvent> { ^

For now, getting back to v4.3.2 without the RCTModernEventEmitter