添加源码

downloadutil/build_source.gradle

@@ -0,0 +1,51 @@
+// 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
+}
+
+android.libraryVariants.all { variant ->
+  println variant.javaCompile.classpath.files
+  if (variant.name == 'release') {
+    //我们只需 release 的 javadoc
+    task("generate${variant.name.capitalize()}Javadoc", type: Javadoc) {
+      // title = ''
+      // description = ''
+      source = variant.javaCompile.source
+      classpath = files(variant.javaCompile.classpath.files, project.android.getBootClasspath())
+      options {
+        encoding "utf-8"
+        links "http://docs.oracle.com/javase/7/docs/api/"
+        linksOffline "http://d.android.com/reference", "${android.sdkDirectory}/docs/reference"
+      }
+      exclude '**/BuildConfig.java'
+      exclude '**/R.java'
+    }
+    task("javadoc${variant.name.capitalize()}Jar", type: Jar,
+        dependsOn: "generate${variant.name.capitalize()}Javadoc") {
+      classifier = 'javadoc'
+      from tasks.getByName("generate${variant.name.capitalize()}Javadoc").destinationDir
+    }
+    artifacts {
+      archives tasks.getByName("javadoc${variant.name.capitalize()}Jar")
+    }
+  }
+}
+
+artifacts {
+  archives sourcesJar
+  archives javadocJar
+}