fdroid-client/build.gradle

buildscript {
    repositories {
        maven { url 'https://maven.google.com/' } // :-| must be before jcenter()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.1'
    }
}
allprojects {
    repositories {
        maven { url 'https://maven.google.com/' } // :-| must be before jcenter()
        jcenter()
    }
}