protected static SSLSocketFactory getSSLSocketFactory(Context context, int[] certificates) {

        if (context == null) {
            throw new NullPointerException("context == null");
        }

        //CertificateFactory用来证书生成
        CertificateFactory certificateFactory;
        try {
            certificateFactory = CertificateFactory.getInstance("X.509");
            //Create a KeyStore containing our trusted CAs
            KeyStore keyStore = 
KeyStore.getInstance(KeyStore.getDefaultType());
            keyStore.load(null, null);

            for (int i = 0; i < certificates.length; i++) {
                //读取本地证书
                InputStream is = context.getResources()
.openRawResource(certificates[i]);
keyStore.setCertificateEntry(String.valueOf(i)
, certificateFactory.generateCertificate(is));

                if (is != null) {
                    is.close();
                }
            }
            //Create a TrustManager that trusts the CAs in our keyStore
            TrustManagerFactory trustManagerFactory = 
TrustManagerFactory.getInstance(
TrustManagerFactory.getDefaultAlgorithm());
            trustManagerFactory.init(keyStore);

            //Create an SSLContext that uses our TrustManager
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, 
trustManagerFactory.getTrustManagers()
, new SecureRandom());
            return sslContext.getSocketFactory();

        } catch (Exception e) {

        }
        return null;
    }

使用

OkHttpClient.Builder builder = new OkHttpClient.Builder().sslSocketFactory(
SslContextFactory.getSSLSocketFactory(this, ints));
        Retrofit retrofit = new Retrofit.Builder()
                .addConverterFactory(GsonConverterFactory.create())
//增加返回值为Gson的支持(以实体类返回)
                .baseUrl("https://api.xxxxxxx.com")//换成自己的
                .client(builder.build())
                .build();
        Api api = retrofit.create(Api.class);
        api.getCourseList().enqueue(new Callback<KeChengModle>() {
            @Override
            public void onResponse(Call<KeChengModle> call
, Response<KeChengModle> response) {
                tv_des.setText(
response.body().getResult().get(0).getName());
            }

            @Override
            public void onFailure(Call<KeChengModle> call, Throwable t) {

            }
        });