在Android中使用自签名证书时的SSLPeerUnverifiedException

try {
    // 导入自签名证书
    InputStream inputStream = getResources().openRawResource(R.raw.self_signed_certificate);
    CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
    X509Certificate certificate = (X509Certificate) certificateFactory.generateCertificate(inputStream);

    // 创建SSL上下文
    KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
    keyStore.load(null, null);
    keyStore.setCertificateEntry("self_signed_certificate", certificate);
    TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
    trustManagerFactory.init(keyStore);
    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(null, trustManagerFactory.getTrustManagers(), null);

    // 配置SSL套接字工厂
    SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
    HttpsURLConnection.setDefaultSSLSocketFactory(sslSocketFactory);

    // 建立安全连接
    URL url = new URL("https://example.com");
    HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
    connection.connect();

    // 处理连接结果
    int responseCode = connection.getResponseCode();
    // ...

} catch (SSLPeerUnverifiedException e) {
    e.printStackTrace();
} catch (Exception e) {
    e.printStackTrace();
}