安卓app - javax.net.ssl.SSLHandshakeException:找不到认证路径的信任锚-标准安卓浏览器工作没有任何问题

TrustManager[] trustAllCerts = new TrustManager[] {
    new X509TrustManager() {
        public void checkClientTrusted(X509Certificate[] chain, String authType) {}
        public void checkServerTrusted(X509Certificate[] chain, String authType) {}
        public X509Certificate[] getAcceptedIssuers() {
            return new X509Certificate[0];
        }
    }
};

try {
    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(null, trustAllCerts, new SecureRandom());
    HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
} catch (Exception e) {
    e.printStackTrace();
}

try {
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    InputStream caInput = getResources().openRawResource(R.raw.server_cert);
    Certificate ca = cf.generateCertificate(caInput);
    caInput.close();

    KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
    keyStore.load(null, null);
    keyStore.setCertificateEntry("server", ca);

    TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
    tmf.init(keyStore);

    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(null, tmf.getTrustManagers(), null);
    HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
} catch (Exception e) {
    e.printStackTrace();
}