android 上传文件报错

ndroid Studio中导入了android-sdk-7.1.2.jar，android-async-http-1.4.9.jar和happy-dns-0.2.5.jar，在上传是报如下错

java.lang.NoClassDefFoundError: com.squareup.okhttp.OkHttpClient 02-23
11:29:44.719 15590-15590/? E/AndroidRuntime: at
com.qiniu.android.http.Client.<init>(Client.java:48) 02-23
11:29:44.719 15590-15590/? E/AndroidRuntime: at
com.qiniu.android.storage.UploadManager.<init>(UploadManager.java:24)
02-23 11:29:44.719 15590-15590/? E/AndroidRuntime: at
com.qiniu.android.storage.UploadManager.<init>(UploadManager.java:19)

报错位置是这行代码，难道还要导入okhttp.jar?
this.uploadManager = new UploadManager();
我加了这行代码
compile 'com.squareup.okhttp3:okhttp:3.1.2'rebuild
已经报错