Android和Java之间的SSLSocket连接

在Android和Java之间建立一个SSL Socket连接，可以通过以下步骤实现：

1. 在Java端生成一个自签名的服务器证书

    // Create keystore to hold the server's private key
    KeyStore serverKeyStore = KeyStore.getInstance("JKS");
    serverKeyStore.load(null, null);
    
    // Generate keypair for the server
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
    keyGen.initialize(1024);
    KeyPair serverKeyPair = keyGen.generateKeyPair();
    
    // Create and store server's private key
    PrivateKey serverPrivateKey = serverKeyPair.getPrivate();
    serverKeyStore.setKeyEntry("server", serverPrivateKey, "password".toCharArray(), new Certificate[] {});
    
    // Create and store server's self-signed certificate
    X509Certificate serverCertificate = generateSelfSignedCertificate(serverKeyPair);
    serverKeyStore.setCertificateEntry("server", serverCertificate);
    
    // Save keystore to disk
    FileOutputStream out = new FileOutputStream("server_keystore.jks");
    serverKeyStore.store(out, "password".toCharArray());
    out.close();

2. 在Java端启动一个SSL服务器并使用生成的证书

    SSLContext sslContext = SSLContext.getInstance("TLS");
    
    // Load server's private key and certificate from keystore
    KeyStore serverKeyStore = KeyStore.getInstance("JKS");
    FileInputStream in = new FileInputStream("server_keystore.jks");
    serverKeyStore.load(in, "password".toCharArray());
    KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance("SunX509");
    keyManagerFactory.init(serverKeyStore, "password".toCharArray());
    
    // Create trust manager that accepts all client certificates
    TrustManager[] trustManagers = new TrustManager[] { new X509TrustManager() {
        public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            // Allow all clients to connect
        }

        public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            // Don't need to check server's certificate
        }

        public X509Certificate[] getAcceptedIssuers() {
            return new X509