在使用android4.4的手機時，請求https接口發(fā)現(xiàn)拋出了此異常，因為在android4.4及以下的手機默認會關(guān)閉tls1.1或者tls1.2的支持，所以我們需要手動去開啟對tls1.1和tls1.2的支持。
解決辦法如下（部分代碼）：
?```
```mBuilder =new OkHttpClient.Builder();
//????OkHttpClient.Builder的配置代碼省略
//android4.4及以下的手機默認不支持tls1.1或者tls1.2，需要手動開啟
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
? ? SSLContext sslContext =null;
? ? try {
sslContext = SSLContext.getInstance("TLS");
? ? ? ? try {
sslContext.init(null, null, null);
? ? ? ? }catch (KeyManagementException e) {
e.printStackTrace();
? ? ? ? }
}catch (NoSuchAlgorithmException e) {
e.printStackTrace();
? ? }
SSLSocketFactory socketFactory =new Tls12SocketFactory(sslContext.getSocketFactory());
? ? mBuilder.sslSocketFactory(socketFactory, new UnSafeTrustManager());
}
public class Tls12SocketFactoryextends SSLSocketFactory {
private static final String[]TLS_SUPPORT_VERSION = {"TLSv1.1", "TLSv1.2"};
? ? final SSLSocketFactorydelegate;
? ? public Tls12SocketFactory(SSLSocketFactory base) {
this.delegate = base;
? ? }
@Override
? ? public String[]getDefaultCipherSuites() {
return delegate.getDefaultCipherSuites();
? ? }
@Override
? ? public String[]getSupportedCipherSuites() {
return delegate.getSupportedCipherSuites();
? ? }
@Override
? ? public SocketcreateSocket(Socket s, String host, int port, boolean autoClose)throws IOException {
return patch(delegate.createSocket(s, host, port, autoClose));
? ? }
@Override
? ? public SocketcreateSocket(String host, int port)throws IOException, UnknownHostException {
return patch(delegate.createSocket(host, port));
? ? }
@Override
? ? public SocketcreateSocket(String host, int port, InetAddress localHost, int localPort)throws IOException, UnknownHostException {
return patch(delegate.createSocket(host, port, localHost, localPort));
? ? }
@Override
? ? public SocketcreateSocket(InetAddress host, int port)throws IOException {
return patch(delegate.createSocket(host, port));
? ? }
@Override
? ? public SocketcreateSocket(InetAddress address, int port, InetAddress localAddress, int localPort)throws IOException {
return patch(delegate.createSocket(address, port, localAddress, localPort));
? ? }
private Socketpatch(Socket s) {
if (sinstanceof SSLSocket) {
((SSLSocket) s).setEnabledProtocols(TLS_SUPPORT_VERSION);
? ? ? ? }
return s;
? ? }
}
public class UnSafeTrustManagerimplements X509TrustManager {
@Override
? ? public void checkClientTrusted(X509Certificate[] chain, String authType)
throws CertificateException
{
}
@Override
? ? public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException
{
}
@Override
? ? public X509Certificate[]getAcceptedIssuers()
{
return new X509Certificate[]{};
? ? }
}```
?```
