"cannot resolve symbol: util" in ExoPlayer 2.6.1 - previously worked fine

Since a few days ago, our projects that use ExoPlayer 2.6.1 no longer compile. Android Studio now gives a cannot resolve symbol: util error even though they have previously compiled without problems.

Steps to reproduce:

1. Create a new project in Android Studio.
2. Add ExoPlayer 2.6.1 as a build dependency by putting implementation 'com.google.android.exoplayer:exoplayer:2.6.1' in the build.gradle file for the application module.
3. Create a new Java class and import the com.google.android.exoplayer2.util.Util package.

Expected behavior:

Gradle should sync and the app should compile.

Actual behavior:

Android Studio throws up a cannot find symbol: util error. Changing the Gradle import to

implementation 'com.google.android.exoplayer:exoplayer-core:2.6.1'
implementation 'com.google.android.exoplayer:exoplayer-hls:2.6.1'

resolves the problem.

As I mentioned earlier, our projects that use ExoPlayer 2.6.1 previously worked without any issues. The repository shows that ExoPlayer 2.6.1 does have a util folder. Has there been a change in the Gradle package?

[ixfd64]

I’m using the following versions:

Android Studio 3.4 Gradle plug-in 2.3.3 (downgraded from latest) Gradle 4.1 (downgraded from latest)

[voghDev]

I’m having the same error. As @ixfd64 said, I could workaround it by downgrading Gradle Android plugin from 3.4.0 to 3.2.0 and gradle-wrapper.properties from 5.1.1 to 4.10.1. This is the last configuration that worked

build.gradle

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.0'
        // ...
    }
}

gradle-wrapper.properties distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip

app/build.gradle implementation 'com.google.android.exoplayer:exoplayer:r2.5.3'

After downgrading Gradle, exoplayer versions r2.5.2, r2.5.3, r2.5.4 seem to work fine, but none of them works with Gradle 3.4.0 - gradle-wrapper 5.1.1. Has anyone found a way to make it work after upgrading Gradle?

Thanks in advance!