Android-網路通訊架構Volley使用詳解

1 Volley發送get請求：

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() {@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發送post請求：

public void postJson() {String url = "http://"+host+":8080/web/json.jsp";StringRequest postRequest = new StringRequest(Request.Method.POST, url,new Response.Listener() {@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 getParams() {Map params = new HashMap();params.put("username", "xjs");params.put("password", "123456");return params;}};mQueue.add(postRequest);}

3 Volley擷取網狀圖片：

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發送Https請求，需要修改源碼：

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擷取服務端返回的cookie，需要修改源碼：

@Overridepublic HttpResponse performRequest(Request request,Map additionalHeaders) throws IOException,AuthFailureError {for (Entry> header : connection.getHeaderFields().entrySet()) {if (header.getKey() != null) {String key = header.getKey();List values = header.getValue();if(key.equalsIgnoreCase("set-cookie")){StringBuilder cookieString = new StringBuilder();for(String value : values){cookieString.append(value).append("\n");//用\n作為分隔字元，cookie中不應該有斷行符號符號}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);}}}}//然後再request中重寫parseNetworkResponse（）：@Overrideprotected Response parseNetworkResponse(NetworkResponse response) {Response superResponse = super.parseNetworkResponse(response);Map responseHeaders = response.headers;String rawCookies = responseHeaders.get("Set-Cookie");//服務端返回是 set-cookie:JSESSIONID=D90B58454550B4D37C4B66A76BF27B93; Path=/otn BIGipServerotn=2564030730.64545.0000; path=/String part1 = substring(rawCookies, "", ";");String part2 = substring(rawCookies, "\n", ";");//用戶端需要的是 cookie:JSESSIONID=D90B58454550B4D37C4B66A76BF27B93; BIGipServerotn=2564030730.64545.0000;cookies = part1 + "; " + part2 + ";";return superResponse;}

6 Volley發請求的時候上傳cookie，在request中重寫getHeaders（）：

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

7 Volley自訂request：

public class ByteArrayRequest extends Request{private final Listener mListener;public ByteArrayRequest(int method, String url, Listener listener, ErrorListener errlistener) {super(method, url, errlistener);mListener = listener;}@Overrideprotected Response 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佈建要求逾時時間：

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

附一個登陸鐵道部12306的例子，源碼在：http://download.csdn.net/download/goldenfish1919/7029907

Ps：我在測試的時候用了本地的一個tomcat，一塊打包放在了asserts下面。

參考：

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

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

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

源碼分析：http://blog.csdn.net/ttdevs/article/details/17764351

發送https請求：http://blog.csdn.net/llwdslal/article/details/18052723

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

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

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

設定逾時：http://stackoverflow.com/questions/17094718/android-volley-timeout

http://blog.csdn.net/dacainiao007/article/details/12617747，這裡關於逾時時間增長的因子的說法不準確，應該是當第一次連線逾時以後，第二次逾時時間會變為原來的多少倍，連線逾時和讀取逾時設定為同一個數。