Android--https

public static SSLContext getSSLContext() {
    // 從assets中加載證書，取到證書的輸入流
    InputStream is = getApplicationContext().getAssets().open("srca.cer");
    // 證書工廠
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    Certificate ca = cf.generateCertificate(is);

    // 加載證書到密鑰庫中
    String keyStoreType = KeyStore.getDefaultType();
    KeyStore keyStore = KeyStore.getInstance(keyStoreType);
    keyStore.load(null);
    keyStore.setCertificateEntry("cert", ca);

    // 加載密鑰庫到信任管理器
    String algorithm = TrustManagerFactory.getDefaultAlgorithm();
    TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(algorithm);
    trustManagerFactory.init(keyStore);
    TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();

    // 用 TrustManager 初始化一個 SSLContext
    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(null, trustManagers, null);
    urlCon.setSSLSocketFactory(sslContext.getSocketFactory());
｝