These are the dependencies:
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.android.support:cardview-v7:27.1.1'
}
When I add implementation 'com.facebook.android:facebook-android-sdk:4.0.1'
then it "breaks" implementation 'com.android.support:appcompat-v7:27.1.1'
with the error: All com.android.support libraries must use the exact same version specification
Some answers from All com.android.support libraries must use the exact same version specification suggest that I have to look at all the libraries but I can't see what's wrong here:
Can someone explain it? I'm complete newbie in android and I must say it's a horrendous mess