ERROR: Unable to resolve dependency in android studio 3.4
I solved my problem by reverting distributionUrl in gradle-wrapper.properties
from
distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip
back to
distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
And also reverting gradle dependency in build.gradle from
classpath 'com.android.tools.build:gradle:3.4.0'
back to
classpath 'com.android.tools.build:gradle:3.3.2'
And now my project is fine.