diff --git a/app/build.gradle b/app/build.gradle
index 6245a35..cc01918 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,8 +1,7 @@
 apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
-
-apply from: './publish.gradle'
+apply plugin: 'org.jetbrains.dokka'
 
 android {
     compileSdkVersion 28
@@ -21,6 +20,15 @@ android {
     }
 }
 
+ext {
+    dokkaOutputDir = "$buildDir/javaDoc/"
+}
+
+dokka {
+    outputFormat = 'javadoc'
+    outputDirectory = dokkaOutputDir
+}
+
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
@@ -32,3 +40,4 @@ dependencies {
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
 }
 
+apply from: './publish.gradle'
\ No newline at end of file
diff --git a/app/publish.gradle b/app/publish.gradle
index d189a52..822c6b5 100644
--- a/app/publish.gradle
+++ b/app/publish.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'maven-publish'
 apply plugin: 'com.jfrog.bintray'
 
-version project.android.defaultConfig.versionName
+version String.valueOf(project.android.defaultConfig.versionName)
 group 'cn.wenhao.xia'
 
 Properties localProperties() {
@@ -11,10 +11,24 @@ Properties localProperties() {
     return localProperties
 }
 
+task sourcesJar(type: Jar) {
+    from android.sourceSets.main.java.srcDirs
+    classifier = 'sources'
+}
+
+task javaDocJar(type: Jar, dependsOn: dokka) {
+    from dokkaOutputDir
+    classifier = 'javaDoc'
+}
+
 publishing {
     publications {
         Production(MavenPublication) {
-            artifact "$buildDir/outputs/aar/app-release.aar"
+            artifacts {
+                "$buildDir/outputs/aar/app-release.aar"
+                archives javaDocJar
+                archives sourcesJar
+            }
             groupId
             artifactId 'safearea'
             version this.version
diff --git a/build.gradle b/build.gradle
index 12bf763..862609d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,22 +1,27 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
-
 buildscript {
     ext.kotlin_version = '1.3.40'
+
     repositories {
         google()
         jcenter()
     }
+
+
     dependencies {
         classpath 'com.android.tools.build:gradle:3.4.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
-
-        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
     }
 }
 
+plugins {
+    id 'org.jetbrains.dokka' version '0.9.18' apply false
+    id 'com.jfrog.bintray' version '1.8.4' apply false
+}
+
+
 allprojects {
     repositories {
         google()