请问在那里下载的   ，地址是多少？

你好.由于

@Override
public X509Certificate[] getAcceptedIssuers() {
   return null;
}

返回null导致

因为OKhttpClient类中的sslSocketFactory()方法实现,有一个非空判断(看下面的代码第二行)

public Builder sslSocketFactory(SSLSocketFactory sslSocketFactory) {
 if (sslSocketFactory == null) throw new NullPointerException("sslSocketFactory == null");
 X509TrustManager trustManager = Platform.get().trustManager(sslSocketFactory);
 if (trustManager == null) {
   throw new IllegalStateException("Unable to extract the trust manager on " + Platform.get()
       + ", sslSocketFactory is " + sslSocketFactory.getClass());
 }
 this.sslSocketFactory = sslSocketFactory;
 this.certificateChainCleaner = CertificateChainCleaner.get(trustManager);
 return this;
}

修改方法:

在httputils类中添加

private static final X509Certificate[] AcceptedIssuers = new X509Certificate[] {};

@Override
public X509Certificate[] getAcceptedIssuers() {
   return AcceptedIssuers ;
}

返回 AcceptedIssuers 问题解决