android报错：Unable to instantiate service com.xiaomi.mipush.sdk.PushMessageHandler

我按照demo集成了环信，但是提示这个错误，但在demo里也没找到小米的sdk呀，怎么解决？

java.lang.RuntimeException: Unable to instantiate service com.xiaomi.mipush.sdk.PushMessageHandler: java.lang.ClassNotFoundException: Didn't find class "com.xiaomi.mipush.sdk.PushMessageHandler" on path: /data/app/com.qlq.zhiyuanzhe-1.apk