Android-网络通信框架Volley使用详解

转载一篇Vollery的文档，方便后面查阅

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<JSONObject>() {@Overridepublic void onResponse(JSONObject response) {Log.e(TAG, "response : " + response.toString());}}, new Response.ErrorListener() {@Overridepublic 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<String>() {@Overridepublic void onResponse(String response) {// responseLog.d("Response", response);}}, new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {// errorLog.d("Error.Response", error.getMessage());}}) {@Overrideprotected Map<String, String> getParams() {Map<String, String> params = new HashMap<String, String>();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[] {};@Overridepublic 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.}@Overridepublic 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;}@Overridepublic X509Certificate[] getAcceptedIssuers() {return _AcceptedIssuers;}public static void allowAllSSL() {HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {@Overridepublic boolean verify(String arg0, SSLSession arg1) {// TODO Auto-generated method stubreturn 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,Map<String, String> additionalHeaders) throws IOException,AuthFailureError {for (Entry<String, List<String>> header : connection.getHeaderFields().entrySet()) {if (header.getKey() != null) {String key = header.getKey();List<String> values = 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 Response<String> parseNetworkResponse(NetworkResponse response) {Response<String> superResponse = super.parseNetworkResponse(response);Map<String, String> responseHeaders = 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 Map<String, String>getHeaders() throws AuthFailureError {         if(cookies!= null && cookies.length() > 0){                   HashMap<String,String>         headers = newHashMap<String, String>();                   headers.put("Cookie",cookies);                   returnheaders;         }         returnsuper.getHeaders();}

7 Volley自定义request：

public class ByteArrayRequest extends Request<byte[]>{private final Listener<byte[]> mListener;public ByteArrayRequest(int method, String url, Listener<byte[]> listener, ErrorListener errlistener) {super(method, url, errlistener);mListener = listener;}@Overrideprotected Response<byte[]> parseNetworkResponse(NetworkResponse response) {if(response == null){return null;}if(response.statusCode != HttpStatus.SC_OK){return null;}byte[] bytes = response.data;return Response.success(bytes, null);}@Overrideprotected 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。