(原创）如何获取网页URL的source code （Android)

1.对于常规的网址如： http开头的：

 URL oracle = new URL( url);
           String test = oracle.toExternalForm();
           String test1 = oracle.toString();
           URI oracle1 = null;
           try {
             oracle1 = oracle.toURI();
        } catch (URISyntaxException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
            BufferedReader in = new BufferedReader(
            new InputStreamReader(oracle.openStream()));

            String inputLine;
            String inputLine2 = "";
            while ((inputLine = in.readLine()) != null)
                inputLine2 +=inputLine;
            in.close(); 

2.对加密网址：如https: (特别是需要证书的）

solution:取消所有证书的检测 

package s.s.d;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.ProtocolException;
import java.net.URL;
import java.security.GeneralSecurityException;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;
import java.util.List;
import java.util.Map;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.HttpConnectionMetrics;

public class AndroidHttpConnection implements ChunkedHttpConnection {
    
    HttpURLConnection  _conn;
    Map<String, List<String>>  _headers;
    
    private static HostnameVerifier _hostnameVerifier;
    private static TrustManager[] _trustManagers;
    static {
        trustAllHostnames();
        trustAllHttpsCertificates();
    }
    
    public static class FakeHostnameVerifier implements HostnameVerifier {
        public boolean verify(String hostname, javax.net.ssl.SSLSession session) {
            return (true);
        }
    }

    private static void trustAllHostnames() {
        if (_hostnameVerifier == null) {
            _hostnameVerifier = new FakeHostnameVerifier();
        }
        HttpsURLConnection.setDefaultHostnameVerifier(_hostnameVerifier);    
    }

    public static class FakeX509TrustManager implements X509TrustManager {
        private static final X509Certificate[] _AcceptedIssuers = new X509Certificate[] {};

        public void checkClientTrusted(X509Certificate[] chain, String authType) {
        }

        public void checkServerTrusted(X509Certificate[] chain, String authType) {
        }

        public X509Certificate[] getAcceptedIssuers() {
            return (_AcceptedIssuers);
        }          
    }

    private static void trustAllHttpsCertificates() {
        SSLContext context;

        // Create a trust manager that does not validate certificate chains
        if (_trustManagers == null) {
            _trustManagers = new TrustManager[] { new FakeX509TrustManager() };
        }
        try {
            context = SSLContext.getInstance("TLS");
            context.init(null, _trustManagers, new SecureRandom());
        } catch (GeneralSecurityException gse) {
            throw new IllegalStateException(gse.getMessage());
        }
        HttpsURLConnection.setDefaultSSLSocketFactory(context
                .getSocketFactory());
    }


    
    
    public AndroidHttpConnection(URL url) throws IOException
    {
        if (!"http".equalsIgnoreCase(url.getProtocol()) && !"https".equalsIgnoreCase(url.getProtocol()))
            throw new ProtocolException("Protocol " + url.getProtocol() + " doesn't support output");    
        
        _conn = (HttpURLConnection)url.openConnection();
        _conn.setRequestMethod("GET");
        _conn.setRequestProperty("Accept", "application/xml");
        _conn.setRequestProperty("Accept-Language", "en-us,en;q=0.5");
            //c.setRequestProperty("Accept-Encoding", "gzip,deflate");
        _conn.setRequestProperty("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.5");
        _conn.setRequestProperty("Keep-Alive", "300");
        _conn.setRequestProperty("Connection", "keep-alive");
        //_conn.connect();
        //_conn.setAllowUserInteraction(false);
        _conn.setUseCaches(true);
        _conn.setInstanceFollowRedirects(false);
        _conn.setDoOutput(true);
    }
    
    public AndroidHttpConnection(String url) throws IOException
    {
        this(new URL(url));
    }

    public long getDate() throws IOException {
        
        return _conn.getDate();
        
    }

    public long getExpiration() throws IOException {
        return _conn.getExpiration();
    }

    public String getFile() {
        return _conn.getURL().getFile();
    }

    public Map<String, List<String>> getHeaders()
    {
        if (_headers == null)
            _headers = _conn.getHeaderFields();        
        
        return _headers;
    }
    public String getHeaderField(String name) throws IOException {
        getHeaders();
        List<String> result = (List<String>)_headers.get(name.toLowerCase());
        if (result != null)
            return result.get(result.size()-1);
        return null;
    }

    public String getHeaderField(int n) throws IOException {
        return _conn.getHeaderField(n);
    }

    public long getHeaderFieldDate(String name, long def) throws IOException {
        return _conn.getHeaderFieldDate(name, def);
    }

    public int getHeaderFieldInt(String name, int def) throws IOException {
        return _conn.getHeaderFieldInt(name, def);
    }

    public String getHeaderFieldKey(int n) throws IOException {
        return _conn.getHeaderFieldKey(n);
    }

    public String getHost() {
        return _conn.getURL().getHost();
    }

    public long getLastModified() throws IOException {
        return _conn.getLastModified();
    }

    public int getPort() {
        return _conn.getURL().getPort();
    }

    public String getProtocol() {
        return _conn.getURL().getProtocol();
    }

    public String getQuery() {
        return _conn.getURL().getQuery();
    }

    public String getRef() {
        return _conn.getURL().getRef();
    }

    public String getRequestMethod() {
        return _conn.getRequestMethod();
    }

    public String getRequestProperty(String key) {
        return _conn.getRequestProperty(key);
    }

    public int getResponseCode() throws IOException {
        //getHeaders();
        return _conn.getResponseCode();
    }

    public String getResponseMessage() throws IOException {
        //getHeaders();
        return _conn.getResponseMessage();
    }

    public String getURL() {
        return _conn.getURL().toString();
    }

    public void setRequestMethod(String method) throws IOException {
        _conn.setRequestMethod(method);
    }

    public void setRequestProperty(String key, String value) throws IOException {
        if (key.equalsIgnoreCase("Transfer-Encoding") && value.equalsIgnoreCase("chunked"))
            _conn.setChunkedStreamingMode(0);
        _conn.setRequestProperty(key, value);
    }

    public String getEncoding() {
        return _conn.getContentEncoding();
    }

    public long getLength() {
        return _conn.getContentLength();
    }

    public String getType() {
        return _conn.getContentType();
    }

    protected InputStream      _is;
    protected DataInputStream _dis;
    public DataInputStream openDataInputStream() throws IOException {        
        if (_dis == null)
            _dis = new DataInputStream(openInputStream());
        return _dis;
    }

    public InputStream openInputStream() throws IOException {
        if (_is == null)
        {    
             //if (_conn.getResponseCode() >= HttpURLConnection.HTTP_BAD_REQUEST)
            // {
            //    _is = _conn.getErrorStream();
             //}
            //else
            {
                _is = _conn.getInputStream();
            }
        }
        return _is;
    }

    public void close() throws IOException {
        _conn.disconnect();
    }

    protected OutputStream     _os;
    protected DataOutputStream _dos;
    public DataOutputStream openDataOutputStream() throws IOException {
        if (_dos == null)
            _dos = new DataOutputStream(openOutputStream());
        return _dos;
    }

    public OutputStream openOutputStream() throws IOException {
        if (_os == null)
            _os = _conn.getOutputStream();
        return _os;
    }
/*
    public void setAuthenticator(final Authenticator auth) {
        java.net.Authenticator.setDefault(new java.net.Authenticator(){
            java.net.PasswordAuthentication _pa = null;
            
            protected java.net.PasswordAuthentication getPasswordAuthentication()
            {
                if (_pa == null)
                {
                    char[] pass = null;
                    PasswordAuthentication pa = auth.onAuthenticationChallenge(this.getRequestingPrompt(), true, true);
                    if(pa.getPassword() != null)
                    {
                        pass = new char[pa.getPassword().length];
                        for(int i = 0; i < pass.length; i++)
                            pass[i] = (char)pa.getPassword()[i];
                    }
                    _pa = new java.net.PasswordAuthentication(new String(pa.getUserName()), pass);
                }
                return _pa;
            }
        });
        
    }
*/




    public InputStream openChunkedInputStream() throws IOException {
        return openInputStream();
    }




    public OutputStream openChunkedOutputStream(int cacheLength)
            throws IOException {
        _conn.setChunkedStreamingMode(cacheLength);        
        return openOutputStream();
    }




    public HttpConnectionMetrics getMetrics() {
        // TODO Auto-generated method stub
        return null;
    }




    public int getSocketTimeout() {
        // TODO Auto-generated method stub
        return 0;
    }




    public boolean isOpen() {
        // TODO Auto-generated method stub
        return false;
    }




    public boolean isStale() {
        // TODO Auto-generated method stub
        return false;
    }




    public void setSocketTimeout(int arg0) {
        // TODO Auto-generated method stub
        
    }




    public void shutdown() throws IOException {
        // TODO Auto-generated method stub
        
    }
}

2).

package s.s.d;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.http.HttpConnection;

public interface ChunkedHttpConnection extends HttpConnection {
    public InputStream openChunkedInputStream() throws IOException;
    public OutputStream openChunkedOutputStream(int cacheLength) throws IOException;
}

3).主题部分：

AndroidHttpConnection con = new AndroidHttpConnection(url);
         //con.setRequestMethod("GET");
         Map<String, List<String>> headers = con.getHeaders();
         int count = headers.size();    
         
         String value = con.getResponseMessage();
         
         InputStream is = con.openInputStream();
        // OutputStream os = con.openOutputStream();
         
        // os.write(buffer, offset, count)
         
         
         BufferedReader in = new BufferedReader(new InputStreamReader(is));          
         
         String inputLine; 
         String htmlCode = ""; 
         
         try { 
            while ((inputLine = in.readLine()) != null) { 
                htmlCode += inputLine; 
               // Log.d(LOG_TAG, "html: " + inputLine); 
            } 
         
            in.close(); 
            } catch (Exception e) { 
                e.printStackTrace(); 
               // Log.d(LOG_TAG, "Error: " + e.getMessage()); 
                //Log.d(LOG_TAG, "HTML CODE: " + htmlCode); 
            }  
        

 网上搜索了一下：

1）.【android】HttpURLConnection 几种不同方法示例【上】

http://www.cnblogs.com/harrisonpc/archive/2011/03/31/2001520.html

2).【android】HttpURLConnection 几种不同方法示例【中】

http://www.cnblogs.com/harrisonpc/archive/2011/03/31/2001526.html

3).【android】HttpURLConnection 几种不同方法示例【下】

http://www.cnblogs.com/harrisonpc/archive/2011/03/31/2001536.html 

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原文地址：https://www.cnblogs.com/Jessy/p/2397720.html