Didn't find class "com.alibaba.sdk.android.httpdns

集成友盟SDK后抛出标题的异常，异常详细信息如下：

Process Name: 'com.yunke.enterprisep.miui' Thread Name: 'main' Back traces starts. java.lang.NoClassDefFoundError: Failed resolution of: Lcom/alibaba/sdk/android/httpdns/HttpDns; at com.umeng.message.proguard.ac.a(Unknown Source:2) at com.umeng.message.proguard.o.<init>(Unknown Source:44) at com.umeng.message.PushAgent.<init>(Unknown Source:8) at com.umeng.message.PushAgent.getInstance(Unknown Source:21) at com.umeng.message.notify.UPushMessageNotifyActivity.a(Unknown Source:8) at com.umeng.message.notify.UPushMessageNotifyActivity.onCreate(Native Method) at android.app.Activity.performCreate(Activity.java:7144) at android.app.Activity.performCreate(Activity.java:7135) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2931) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6718) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) Caused by: java.lang.ClassNotFoundException: Didn't find class "com.alibaba.sdk.android.httpdns.HttpDns" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.yunke.enterprisep.miui-ubwltmRMh1d9qjoPoiJHXg==/base.apk", dex file "/data/data/com.yunke.enterprisep.miui/.jiagu/tmp.dex"],nativeLibraryDirectories=[/data/app/com.yunke.enterprisep.miui-ubwltmRMh1d9qjoPoiJHXg==/lib/arm64, /data/app/com.yunke.enterprisep.miui-ubwltmRMh1d9qjoPoiJHXg==/base.apk!/lib/arm64-v8a, /system/lib64]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134) at java.lang.ClassLoader.loadClass(ClassLoader.java:379) at java.lang.ClassLoader.loadClass(ClassLoader.java:312) ... 21 more Back traces ends.

请问这个异常怎么解决？