diff --git a/app/build.gradle b/app/build.gradle
index 4af0110..7ade61b 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.1"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.3"
     defaultConfig {
         applicationId "com.donkingliang.headerviewadapterdemo"
-        minSdkVersion 15
-        targetSdkVersion 26
+        minSdkVersion 14
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -24,7 +24,7 @@ dependencies {
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:26.+'
+    compile 'com.android.support:appcompat-v7:25.3.1'
     compile 'com.android.support.constraint:constraint-layout:1.0.2'
     testCompile 'junit:junit:4.12'
 
diff --git a/headerviewadapter/build.gradle b/headerviewadapter/build.gradle
index 2406aea..019c94c 100644
--- a/headerviewadapter/build.gradle
+++ b/headerviewadapter/build.gradle
@@ -1,12 +1,13 @@
 apply plugin: 'com.android.library'
+group='com.github.donkingliang' // 指定group，com.github.<用户名>
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.1"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.3"
 
     defaultConfig {
-        minSdkVersion 15
-        targetSdkVersion 26
+        minSdkVersion 14
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
 
@@ -26,7 +27,30 @@ dependencies {
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:26.+'
+    compile 'com.android.support:appcompat-v7:25.3.1'
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:recyclerview-v7:26.+'
+    compile 'com.android.support:recyclerview-v7:25.3.1'
 }
+
+//---------------------------------------------
+// 指定编码
+tasks.withType(JavaCompile) {
+    options.encoding = "UTF-8"
+}
+
+// 打包源码
+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
+}
+
+artifacts {
+    archives sourcesJar
+}
\ No newline at end of file