切换到maven central尝试下

build.gradle

@@ -1,5 +1,4 @@
 apply plugin: 'kotlin'
-apply from: 'bintray.gradle'
 apply from: 'publish.gradle'
 
 buildscript {
@@ -10,7 +9,7 @@ buildscript {
 
     dependencies {
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.71"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.20"
     }
 }
 

gradle.properties

@@ -0,0 +1,4 @@
+# signing
+signing.keyId=
+signing.password=
+signing.secretKeyRingFile=

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip

publish.gradle

@@ -18,6 +18,9 @@ static def isSnapshot(def version) {
 uploadArchives {
     repositories {
         mavenDeployer {
+
+            beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
             if (DEBUG) {
                 repository(url: uri("${buildDir}/libs"))
             } else {
@@ -37,9 +40,40 @@ uploadArchives {
                     }
                 }
             }
-            pom.groupId = GROUP
-            pom.artifactId = ARTIFACT
-            pom.version = VERSION
+            pom {
+                groupId = GROUP
+                artifactId = ARTIFACT
+                version = VERSION
+            }
         }
     }
 }
+
+afterEvaluate { project ->
+    if (project.getPlugins().hasPlugin('com.android.application') ||
+            project.getPlugins().hasPlugin('com.android.library')) {
+        task androidSourcesJar(type: Jar) {
+            classifier = 'sources'
+            from android.sourceSets.main.java.source
+        }
+        artifacts {
+            archives androidSourcesJar
+        }
+    } else {
+        task javadocJar(type: Jar) {
+            classifier = 'javadoc'
+            from javadoc
+        }
+        task sourcesJar(type: Jar) {
+            classifier = 'sources'
+            from sourceSets.main.allSource
+        }
+        artifacts {
+            archives javadocJar, sourcesJar
+        }
+    }
+}
+
+signing {
+    sign configurations.archives
+}