android asynchttpclient 编码,android AsyncHttpClient 开源框架的使用-优快云博客

这个代码段展示了如何实现一个基于AsyncHttpClient的网络请求管理类，用于发送JSON数据并处理响应。类中包含了单例模式、任务队列、用户信息设置以及缓存读写功能。当网络请求失败时，会尝试从缓存中获取数据，并将未完成的请求加入上传队列。同时，类还提供了根据任务需求进行缓存操作的逻辑。

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20 public classCommandBase {21

22 private static CommandBase m_instance = null;23

24 private HashMap m_task = new HashMap();25

26 private AsyncHttpClient m_httpClient = newAsyncHttpClient();27

28 private UploadQueue m_uploadQueue = null;29 private HashMap m_tempRequest = new HashMap();30

31 private static String m_account = "";32 private static String m_session = "";33

34 private static String HostUrl = "http://222.18.162.187:8080/wasp/webservice/ap/";35 private static JSONObject m_postData = newJSONObject();36

37 Context m_context;38 Context m_currContext;39 Activity m_currActivity;40

41 public voidsetCurrActivityContext(Context context, Activity activity) {42 m_currContext =context;43 m_currActivity =activity;44 }45

46 public voidsetMainActivityContext(Context context) {47 m_context =context;48

49 if (m_uploadQueue == null)50 m_uploadQueue = newUploadQueue(m_context);51 }52

53 public staticCommandBase instance() {54 if (m_instance == null)55 m_instance = newCommandBase();56

57 returnm_instance;58 }59

60 privateCommandBase() {61 m_httpClient.addHeader("Content-Type", "application/json");62 m_httpClient.addHeader("Request-Client", "mobile/1.0.0");63

64 /*

65 * JSONObject userData = new JSONObject(); try { userData.put("account",66 * m_account); userData.put("session", m_session);67 * m_postData.put("user", userData); } catch (JSONException e) {68 * e.printStackTrace(); }69 */

70 }71

72 public voidsetUserInfo(String name, String session) {73 m_account =name;74 m_session =session;75 System.out.println("setUser");76 System.out.println("account=" +m_account);77 JSONObject userData = newJSONObject();78 try{79 userData.put("account", m_account);80 userData.put("session", m_session);81 m_postData.put("user", userData);82 } catch(JSONException e) {83 e.printStackTrace();84 }85 }86

87 CacheManager manager = newCacheManager();88

89 public void readCache(finalTaskListener taskListener) {90 List> list = new ArrayList>();91 String queryStr =taskListener.readCache();92 list =manager.getCacheData(queryStr);93 taskListener.updateCacheDate(list);94 request(taskListener);95 }96

97 public void request(finalTaskListener task) {98 RequestParams postParam = newRequestParams();99 postParam.put("req", requestData(task.requestData()));100

101 JsonHttpResponseHandler handler = newJsonHttpResponseHandler() {102 @Override103 public voidonFailure(Throwable arg0, String arg1) {104 task.failure(arg1);105 super.onFailure(arg0, arg1);106 System.out.println("网络连接失败..");107 if (task.needCacheTask() && m_uploadQueue != null

108 && m_tempRequest.containsKey(this))109 m_uploadQueue.addItemToQueue(m_tempRequest.get(this));110 m_tempRequest.remove(this);111 Toast.makeText(m_currContext, "网络连接失败", Toast.LENGTH_SHORT)112 .show();113 }114

115 @Override116 public voidonFinish() {117 task.finish();118 super.onFinish();119 System.out.println("请求结束");120 }121

122 @Override123 public voidonSuccess(JSONObject arg1) {124 super.onSuccess(arg1);125 System.out.println("连接服务器成功！");126 System.out.println("结果=" +arg1);127 readData(arg1, this);128 }129

130 @Override131 public voidonStart() {132 task.start();133 super.onStart();134 System.out.println("请求开始");135 }136 };137

138 //TODO: save network request to local DB

139 if(task.needCacheTask()) {140 System.out.println("++++++++++++++++++++++++++++++++++++++++");141 m_tempRequest.put(142 handler,143 new UploadItem(0, requestUrl(task.requestUrl()),144 requestData(task.requestData()),145 task.contentype() == "text" ? 0 : 1, task146 .filepath()));147

148 }149

150 m_task.put(handler, task);151 m_httpClient.post(requestUrl(task.requestUrl()), postParam, handler);152

153

154

155 }156

157 privateString requestUrl(String ap) {158 return HostUrl + ap + ".action";159 }160

161 privateString requestData(JSONObject data) {162 JSONObject postData = newJSONObject();163 postData =m_postData;164 try{165 postData.put("data", data);166 } catch(JSONException e) {167 e.printStackTrace();168 }169 System.out.println("postData=" +postData);170 returnpostData.toString();171 }172

173 private voidreadData(JSONObject data, AsyncHttpResponseHandler handler) {174 TaskListener task =m_task.get(handler);175

176 if (task == null) {177 m_task.remove(handler);178 m_tempRequest.remove(handler);179 return;180 }181 //TODO: Check the response data has Error or not

182 try{183 JSONObject object = data.getJSONObject("error");184 String code = object.getString("code");185 String errorTag = object.getString("string");186 System.out.println("code=" +code);187 System.out.println("error=" +errorTag);188 if (code.equals("0")) {189 object = data.getJSONObject("data");190 task.messageUpdated(data);191 manager.updateCacheData(data);192 m_tempRequest.remove(handler);193 } else if (code.equals("-99")) {194 Toast.makeText(m_currContext, "用户信息已过期,请重新登陆",195 Toast.LENGTH_SHORT).show();196 m_currActivity.finish();197 } else{198 System.out.println("#####################");199 if (task.needCacheTask() && m_uploadQueue != null

200 &&m_tempRequest.containsKey(handler)) {201 System.out.println("_____________________________");202 m_uploadQueue.addItemToQueue(m_tempRequest.get(handler));203 }204 m_tempRequest.remove(handler);205 Toast.makeText(m_currContext, errorTag, Toast.LENGTH_SHORT)206 .show();207 }208 } catch(JSONException e) {209 e.printStackTrace();210 if (task.needCacheTask() && m_uploadQueue != null

211 &&m_tempRequest.containsKey(handler)) {212 m_uploadQueue.addItemToQueue(m_tempRequest.get(handler));213 }214 m_tempRequest.remove(handler);215

216 }217

218

219 m_task.remove(handler);220 }221

222 }