DownloadUtil 重命名为 Aria，代码已重构，使用起来更加简便

Aria/build.gradle

@@ -0,0 +1,26 @@
+apply plugin: 'com.android.library'
+
+android {
+  compileSdkVersion 23
+  buildToolsVersion "23.0.2"
+
+  defaultConfig {
+    minSdkVersion 9
+    targetSdkVersion 23
+    versionCode 58
+    versionName "2.3.0"
+  }
+  buildTypes {
+    release {
+      minifyEnabled false
+      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+    }
+  }
+}
+
+dependencies {
+  compile fileTree(dir: 'libs', include: ['*.jar'])
+  testCompile 'junit:junit:4.12'
+  compile 'com.android.support:appcompat-v7:23.1.1'
+}
+apply from: 'jcenter.gradle'