在Android的API 24及以上版本中，可以使用Network security configuration来解决这个问题。但是，在API 23及以下版本中，我们需要进行以下操作来确保应用程序可以使用自签名证书：

1. 创建一个类名为“CustomSSLSocketFactory”的类

import java.io.IOException; import java.net.InetAddress; import java.net.Socket; import java.net.UnknownHostException; import java.security.KeyManagementException; import java.security.KeyStore; import java.security.KeyStoreException; import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import java.util.Arrays;

import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocket; import javax.net.ssl.TrustManager; import javax.net.ssl.TrustManagerFactory; import javax.net.ssl.X509TrustManager; import javax.net.ssl.SSLSocketFactory;

/**

• Created by braj19 on 02/05/16. */ public class CustomSSLSocketFactory extends SSLSocketFactory {

  private SSLContext mSSLContext; private X509TrustManager mTrustManager;

  public CustomSSLSocketFactory(KeyStore keyStore) throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, CertificateException, IOException { TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()); trustManagerFactory.init(keyStore); mTrustManager = (X509TrustManager) trustManagerFactory.getTrustManagers()[0];

   mSSLContext = SSLContext.getInstance("TLS");
   mSSLContext.init(null, new TrustManager[]{mTrustManager}, new SecureRandom());
  

  }

  @Override public String[] getDefaultCipherSuites() { return new String[0]; }

  @Override public String[] getSupportedCipherSuites() { return new String[0]; }

  @Override public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException { SSLSocket sslSocket = (SSLSocket) mSSLContext.getSocketFactory().createSocket(s, host, port, autoClose); sslSocket.setEnabledProtocols(sslSocket.getSupportedProtocols()); return sslSocket; }

  @Override public Socket createSocket(String host, int port) throws IOException, UnknownHostException { SSLSocket sslSocket = (SSLSocket) mSSLContext.getSocketFactory().createSocket(host, port); sslSocket.setEnabledProtocols(sslSocket.getSupportedProtocols()); return sslSocket; }

  @Override public Socket