I see the problem now!

library/build.gradle

@@ -9,11 +9,8 @@ buildscript {
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'com.github.dcendents.android-maven'
 apply plugin: 'kotlin-android'
-//apply plugin: 'maven-publish'
+apply plugin: 'com.github.dcendents.android-maven'
-
-
 
 android {
     compileSdkVersion 24
@@ -46,29 +43,4 @@ repositories {
     mavenCentral()
 }
 
-
+apply from: 'publish.gradle'
-// build a jar with source files
-task sourcesJar(type: Jar) {
-    from android.sourceSets.main.java.srcDirs
-    classifier = 'sources'
-}
-
-task javadoc(type: Javadoc) {
-    failOnError  false
-    source = android.sourceSets.main.java.sourceFiles
-    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
-    classpath += configurations.compile
-}
-
-// build a jar with javadoc
-task javadocJar(type: Jar, dependsOn: javadoc) {
-    classifier = 'javadoc'
-    from javadoc.destinationDir
-}
-
-artifacts {
-    archives sourcesJar
-    archives javadocJar
-}
-
-//apply from: 'publish.gradle'

library/publish.gradle

@@ -1,19 +1,4 @@
-
+// build a jar with source files
-group "$ext_groupId"
-version "$ext_version"
-
-publishing {
-  publications {
-    MyPublication(MavenPublication) {
-      from components.java
-      artifact sourcesJar
-      groupId "$ext_groupId"
-      artifactId "$ext_artifactId"
-      version "$ext_version"
-    }
-  }
-}
-
 task sourcesJar(type: Jar) {
     from android.sourceSets.main.java.srcDirs
     classifier = 'sources'
@@ -33,34 +18,35 @@ task javadocJar(type: Jar, dependsOn: javadoc) {
 }
 
 artifacts {
-    archives javadocJar
     archives sourcesJar
+    archives javadocJar
 }
 
-bintray {
+//
-  user = System.getenv('BINTRAY_USER')
+//bintray {
-  key = System.getenv('BINTRAY_API_KEY')
+//  user = System.getenv('BINTRAY_USER')
-
+//  key = System.getenv('BINTRAY_API_KEY')
-  dryRun = false
+//
-  publish = true
+//  dryRun = false
-
+//  publish = true
-  publications = ['MyPublication']
+//
-  pkg {
+//  publications = ['MyPublication']
-    repo = 'maven'
+//  pkg {
-    name = "$ext_artifactId"
+//    repo = 'maven'
-    licenses = ['Apache-2.0']
+//    name = "$ext_artifactId"
-    labels = ['android', 'gradle-plugin']
+//    licenses = ['Apache-2.0']
-
+//    labels = ['android', 'gradle-plugin']
-    publicDownloadNumbers = true
+//
-    vcsUrl = "$ext_vcsUrl"
+//    publicDownloadNumbers = true
-
+//    vcsUrl = "$ext_vcsUrl"
-    version {
+//
-      name = "$ext_version"
+//    version {
-      desc = "$ext_description"
+//      name = "$ext_version"
-      released  = new Date()
+//      desc = "$ext_description"
-      gpg {
+//      released  = new Date()
-          sign = true // Determines whether to GPG sign the files.
+//      gpg {
-      }
+//          sign = true // Determines whether to GPG sign the files.
-    }
+//      }
-  }
+//    }
-}
+//  }
+//}