如何修复此 UnknownHostException？

public static final String readURL(String url)throws Throwable
{
        try {
            InputStream in = (InputStream) fetch(url);
            byte[] bArr = readBytes(in);
            return new String(bArr);
        } catch (Throwable e) {
            throw e;
            }
}


public static final Object fetch(String address) throws MalformedURLException,IOException {
    URL url = new URL(address);
    Object content = url.getContent();
    return content;
}

我在代理后面，当我尝试时

读取网址("http://abc.com http://abc.com")

访问网址http://abc.com http://abc.com它抛出 java.net.UnknownHostException： 我有：

<uses-permission android:name="android.permission.INTERNET" /> 

在清单文件中。

有什么快速解决办法吗？

Proxy proxy = new Proxy(Proxy.DIRECT,
    new InetSocketAddress(proxyHost, proxyPort));
url.openConnection(proxy);

or

System.setProperty("http.proxyHost", "my.proxyhost.com");
System.setProperty("http.proxyPort", "1234");