出问题的log.  

java.lang.NoSuchFieldError: No static field INSTANCE of type Lorg/apache/http/conn/ssl/AllowAllHostnameVerifier; in class Lorg/apache/http/conn/ssl/AllowAllHostnameVerifier; or its superclasses (declaration of 'org.apache.http.conn.ssl.AllowAllHostnameVerifier' appears in /system/framework/framework.jar!classes3.dex)

        at org.apache.http.conn.ssl.SSLConnectionSocketFactory.<clinit>(SSLConnectionSocketFactory.java:151)

        at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:977)

        at com.wechat.pay.contrib.apache.httpclient.WechatPayHttpClientBuilder.build(WechatPayHttpClientBuilder.java:88)

        at com.example.myapplication.MainActivity.sendHttpRequest2(MainActivity.java:250)

        at com.example.myapplication.MainActivity.access$000(MainActivity.java:64)

        at com.example.myapplication.MainActivity$2.run(MainActivity.java:186)

        at java.lang.Thread.run(Thread.java:919)

使用wechatpay-apache-httpclient 0.4.8 SDK, 出错时的代码片段如下，创建WechatPayHttpClientBuilder的时候出现上述异常.

        X509Certificate certificate = getCertificate(CERT_PATH + "wechatpay.pem");

        List<X509Certificate> x509CertificateList = new ArrayList<>();

        x509CertificateList.add(certificate);

        PrivateKey privateKey = getPrivateKey(CERT_PATH + "apiclient_key.pem");

        WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()

                .withMerchant(mch_id, mchSerialNo, privateKey)

                .withWechatPay(x509CertificateList);

        CloseableHttpClient httpClient = null;

        try {

            httpClient = builder.build();

        } catch (IllegalArgumentException e) {

            Log.e("ERROR", "IllegalArgumentException =" + e.getMessage());

        }