问题描述: 在Android 9上使用AsyncHttpClient库连接到Post URL时无法成功连接。
解决方法: 问题可能是由于Android 9对于默认的加密协议进行了更改而导致的。为了解决这个问题,你可以尝试以下几种方法:
更新AsyncHttpClient库版本: 确保你正在使用最新版本的AsyncHttpClient库,因为较旧的版本可能不兼容Android 9。
启用TLSv1.2: Android 9默认禁用了TLSv1.2协议,而某些服务器可能需要该协议才能连接。你可以尝试在连接之前启用TLSv1.2协议。示例代码如下:
AsyncHttpClient client = new AsyncHttpClient();
client.setSSLSocketFactory(new SSLSocketFactoryCompat());
然后,创建一个SSLSocketFactoryCompat
类,该类继承自SSLSocketFactory
并启用TLSv1.2协议。示例代码如下:
public class SSLSocketFactoryCompat extends SSLSocketFactory {
private final SSLSocketFactory delegate;
public SSLSocketFactoryCompat() throws KeyManagementException, NoSuchAlgorithmException {
SSLContext context = SSLContext.getInstance("TLSv1.2");
context.init(null, null, null);
delegate = context.getSocketFactory();
}
@Override
public String[] getDefaultCipherSuites() {
return delegate.getDefaultCipherSuites();
}
@Override
public String[] getSupportedCipherSuites() {
return delegate.getSupportedCipherSuites();
}
@Override
public Socket createSocket() throws IOException {
return enableTLSOnSocket(delegate.createSocket());
}
@Override
public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
return enableTLSOnSocket(delegate.createSocket(s, host, port, autoClose));
}
@Override
public Socket createSocket(String host, int port) throws IOException {
return enableTLSOnSocket(delegate.createSocket(host, port));
}
@Override
public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException {
return enableTLSOnSocket(delegate.createSocket(host, port, localHost, localPort));
}
@Override
public Socket createSocket(InetAddress host, int port) throws IOException {
return enableTLSOnSocket(delegate.createSocket(host, port));
}
@Override
public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException {
return enableTLSOnSocket(delegate.createSocket(address, port, localAddress, localPort));
}
private Socket enableTLSOnSocket(Socket socket) {
if (socket instanceof SSLSocket) {
((SSLSocket) socket).setEnabledProtocols(new String[]{"TLSv1.2"});
}
return socket;
}
}
使用OkHttp替代AsyncHttpClient: 如果以上方法仍然无法解决问题,你可以尝试使用OkHttp库来代替AsyncHttpClient。OkHttp在Android 9上通常能够正常工作,并且更受Android官方推荐和支持。
首先,确保你已经添加了OkHttp库的依赖项。然后,使用以下代码示例来使用OkHttp发送POST请求:
OkHttpClient client = new OkHttpClient();
RequestBody requestBody = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("key1", "value1")
.addFormDataPart("key2", "value2")
.build();
Request request = new Request.Builder()
.url("your_post_url_here")
.post(requestBody)
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
// 处理请求失败情况
}
@Override
public void onResponse(Call call, Response response) throws IOException {
// 处理请求成功情况,获取响应数据
}
});
通过这些方法,你应该能够在Android 9上成功连接到Post URL。如果问题仍然存在,请确保Post URL的正确性,并检查设备的网络连接情况。