1 Volley发送get请求：

public void getJson() {	String url = "http://"+host+":8080/web/json.jsp?username=xjs&password=123456";	mQueue.add(new JsonObjectRequest(Method.GET, url, null,		new Listener() {			@Override			public void onResponse(JSONObject response) {				Log.e(TAG, "response : " + response.toString());			}		}, new Response.ErrorListener() {			@Override			public void onErrorResponse(VolleyError error) {				String err = error.getMessage();				Log.e(TAG, "err : " + err);			}		}));}

2 Volley发送post请求：

public void postJson() {	String url = "http://"+host+":8080/web/json.jsp";	StringRequest postRequest = new StringRequest(			Request.Method.POST, 			url,			new Response.Listener() {				@Override				public void onResponse(String response) {					// response					Log.d("Response", response);				}			}, new Response.ErrorListener() {				@Override				public void onErrorResponse(VolleyError error) {					// error					Log.d("Error.Response", error.getMessage());				}			}) {		@Override		protected MapgetParams() {			Mapparams = new HashMap();			params.put("username", "xjs");			params.put("password", "123456");			return params;		}	};	mQueue.add(postRequest);}

3 Volley获取网络图片：

public void getImage() {	String imageUrl = "http://"+host+":8080/web/image.jsp";	NetworkImageView view = (NetworkImageView) findViewById(R.id.network_image_view);	view.setDefaultImageResId(android.R.drawable.ic_menu_rotate); 	view.setErrorImageResId(android.R.drawable.ic_delete); 	view.setImageUrl(imageUrl, new ImageLoader(mQueue, new BitmapLruCache(1024 * 4)));}

4 Volley发送Https请求，需要修改源码：

protected HttpURLConnection createConnection(URL url) throws IOException {	if (url.toString().toLowerCase(Locale.CHINA).startsWith("https")) {		HTTPSTrustManager.allowAllSSL();	}	return (HttpURLConnection) url.openConnection();}//HTTPSTrustManager.java:public class HTTPSTrustManager implements X509TrustManager {	private static TrustManager[] trustManagers;	private static final X509Certificate[] _AcceptedIssuers = new X509Certificate[] {};	@Override	public void checkClientTrusted(			java.security.cert.X509Certificate[] x509Certificates, String s)			throws java.security.cert.CertificateException {		// To change body of implemented methods use File | Settings | File		// Templates.	}	@Override	public void checkServerTrusted(			java.security.cert.X509Certificate[] x509Certificates, String s)			throws java.security.cert.CertificateException {		// To change body of implemented methods use File | Settings | File		// Templates.	}	public boolean isClientTrusted(X509Certificate[] chain) {		return true;	}	public boolean isServerTrusted(X509Certificate[] chain) {		return true;	}	@Override	public X509Certificate[] getAcceptedIssuers() {		return _AcceptedIssuers;	}	public static void allowAllSSL() {		HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {			@Override			public boolean verify(String arg0, SSLSession arg1) {				// TODO Auto-generated method stub				return true;			}		});		SSLContext context = null;		if (trustManagers == null) {			trustManagers = new TrustManager[] { new HTTPSTrustManager() };		}		try {			context = SSLContext.getInstance("TLS");			context.init(null, trustManagers, new SecureRandom());		} catch (NoSuchAlgorithmException e) {			e.printStackTrace();		} catch (KeyManagementException e) {			e.printStackTrace();		}		HttpsURLConnection.setDefaultSSLSocketFactory(context.getSocketFactory());	}}

5 Volley获取服务端返回的cookie，需要修改源码：

@Overridepublic HttpResponse performRequest(Request> request,MapadditionalHeaders) 	throws IOException,AuthFailureError {	for (Entry> header : connection.getHeaderFields().entrySet()) {	if (header.getKey() != null) {		String key = header.getKey();		Listvalues = header.getValue();		if(key.equalsIgnoreCase("set-cookie")){			StringBuilder cookieString = new StringBuilder();			for(String value : values){				cookieString.append(value).append("\n");//用\n作为分隔符，cookie中不应该有回车符号			}			cookieString.deleteCharAt(cookieString.length() - 1);			Header h = new BasicHeader(header.getKey(), cookieString.toString());			response.addHeader(h);		}else{			Header h = new BasicHeader(header.getKey(), values.get(0));			response.addHeader(h);		}	}}}//然后再request中重写parseNetworkResponse（）：@Overrideprotected ResponseparseNetworkResponse(NetworkResponse response) {	ResponsesuperResponse = super.parseNetworkResponse(response);	MapresponseHeaders = response.headers;	String rawCookies = responseHeaders.get("Set-Cookie");	//服务端返回是 set-cookie:JSESSIONID=D90B58454550B4D37C4B66A76BF27B93; Path=/otn BIGipServerotn=2564030730.64545.0000; path=/	String part1 = substring(rawCookies, "", ";");	String part2 = substring(rawCookies, "\n", ";");	//客户端需要的是 cookie:JSESSIONID=D90B58454550B4D37C4B66A76BF27B93; BIGipServerotn=2564030730.64545.0000;	cookies = part1 + "; " + part2 + ";";	return superResponse;}

6 Volley发请求的时候上传cookie，在request中重写getHeaders（）：

@Overridepublic MapgetHeaders() throws AuthFailureError {         if(cookies!= null && cookies.length() > 0){                   HashMapheaders = newHashMap();                   headers.put("Cookie",cookies);                   returnheaders;         }         returnsuper.getHeaders();}

7 Volley自定义request：

public class ByteArrayRequest extends Request{	private final ListenermListener;	public ByteArrayRequest(int method, String url, Listenerlistener, ErrorListener errlistener) {		super(method, url, errlistener);		mListener = listener;	}	@Override	protected ResponseparseNetworkResponse(NetworkResponse response) {		if(response == null){			return null;		}		if(response.statusCode != HttpStatus.SC_OK){			return null;		}		byte[] bytes = response.data;		return Response.success(bytes, null);	}	@Override	protected void deliverResponse(byte[] response) {		if(mListener != null){			mListener.onResponse(response);		}	}}

8 Volley设置请求超时时间：

@Overridepublic RetryPolicy getRetryPolicy() {          RetryPolicyretryPolicy = new DefaultRetryPolicy(5000,DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);          returnretryPolicy; }

附一个登陆铁道部12306的例子，源码在：http://download.csdn.net/download/goldenfish1919/7029907

Ps：我在测试的时候用了本地的一个tomcat，一块打包放在了asserts下面。

参考：

http://blog.csdn.net/xyz_lmn/article/details/12165391

http://blog.csdn.net/xyz_lmn/article/details/12746581

http://blog.csdn.net/xyz_lmn/article/details/12177005

http://www.itsalif.info/content/android-volley-tutorial-http-get-post-put

概述：http://blog.csdn.net/t12x3456/article/details/9221611

入门： http://blog.csdn.net/ttdevs/article/details/17566795

自定义request： http://blog.csdn.net/ttdevs/article/details/17586205

源码分析：http://blog.csdn.net/ttdevs/article/details/17764351

发送https请求：http://blog.csdn.net/llwdslal/article/details/18052723

构造cache：http://stackoverflow.com/questions/16682595/android-volley-imageloader-bitmaplrucache-parameter

解析服务端cookie：http://stackoverflow.com/questions/20702178/android-volley-access-http-response-header-fields，http://blog.csdn.net/hpb21/article/details/12163371

上传cookie：http://stackoverflow.com/questions/17049473/how-to-set-custom-header-in-volley-request

设置超时：http://stackoverflow.com/questions/17094718/android-volley-timeout

http://blog.csdn.net/dacainiao007/article/details/12617747，这里关于超时时间增长的因子的说法不准确，应该是当第一次连接超时以后，第二次超时时间会变为原来的多少倍，连接超时和读取超时设置为同一个数。