android http连接服务器

判断网络连接情况

public static boolean isConnected(Context context) {// <span class="comment" style="margin: 0px; padding: 0px; border: none; color: rgb(0, 130, 0); font-family: Consolas, 'Courier New', Courier, mono, serif; line-height: 18px;">ConnectivityManager主要管理和网络连接相关的操作</span><span style="font-family: Consolas, 'Courier New', Courier, mono, serif; line-height: 18px;"> </span>ConnectivityManager conManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);// 网络信息 <span class="comment" style="margin: 0px; padding: 0px; border: none; color: rgb(0, 130, 0); font-family: Consolas, 'Courier New', Courier, mono, serif; line-height: 18px; background-color: rgb(248, 248, 248);">NetworkInfo类包含了对wifi和mobile两种网络模式连接的详细描述</span>NetworkInfo networkInfo = conManager.getActiveNetworkInfo();// 检查网络if (networkInfo != null) {return conManager.getActiveNetworkInfo().isConnected();}return false;}

httppost通过post机制将提价的表单放在html header中用户在URL中看不到

post将数据放在List<<span style="font-family: Arial, Helvetica, sans-serif;">NameValuePair</span>>中

<pre name="code" class="java">/** * HTTP Post 通信处理 * @param context  * @param apiUrl  * @param nameValuePair  * @return String * @throws Exception */public static String httpPost(Context context, String apiUrl, List<NameValuePair> nameValuePair, String baseUserAgent) throws Exception {//HttpClientHttpClient httpClient = new DefaultHttpClient();HttpParams httpParameters = new BasicHttpParams();HttpConnectionParams.setConnectionTimeout(httpParameters, 10000);HttpConnectionParams.setSoTimeout(httpParameters, 10000);try {baseUserAgent = baseUserAgent + AppInfoUtil.getAppVersionName(context);} catch(Exception e) {return "";}baseUserAgent = baseUserAgent + " " + httpClient.getParams().getParameter("http.useragent");//（http.useragent）httpClient.getParams().setParameter("http.useragent", baseUserAgent);//HTTP PostHttpPost httppost = new HttpPost(apiUrl);int responseCode = 0;String result = "";httppost.setEntity(new UrlEncodedFormEntity(nameValuePair, HTTP.UTF_8));//HTTP post通信HttpResponse response = httpClient.execute(httppost);//返回值responseCode = response.getStatusLine().getStatusCode();if(responseCode == HttpStatus.SC_OK) {ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();response.getEntity().writeTo(byteArrayOutputStream);result = byteArrayOutputStream.toString();} else if(responseCode == HttpStatus.SC_NOT_FOUND) {//服务器连接失败throw new FileNotFoundException();} else if(responseCode == HttpStatus.SC_REQUEST_TIMEOUT) {//连接超时throw new Exception();}return result;}

get将表单拼接到url中，用户是可以看到的

get将数据拼到url后面 eg http://172.23.1.23//api01/?username=""&pwd=""<pre name="code" class="java">/** * HTTP GET通信 * @param url * @return * @throws Exception  */public static String httpGet2(Context context, String url, String userAgent) throws Exception  {// offline// 网络连接确认if (NetworkUtil.isConnected(context) == false) {throw new Exception();}//HttpParams httpParameters = new BasicHttpParams();//        HttpConnectionParams.setConnectionTimeout(httpParameters, 40000);//        HttpConnectionParams.setSoTimeout(httpParameters, 40000);//        HttpClient httpClient = new DefaultHttpClient(httpParameters);App app = (App)((Activity)context).getApplication();HttpClient httpClient = app.getHttpClient();////HttpParams params = httpClient.getParams();////HttpConnectionParams.setConnectionTimeout(params, 10000);//HttpConnectionParams.setSoTimeout(params, 10000);HttpGet request = new HttpGet(url);request.addHeader(Constant.USER_AGENT, userAgent);HttpResponse httpResponse = null;try {httpResponse = httpClient.execute(request);// 通信失败if (httpResponse == null) {throw new Exception();}}catch (Exception e) {TCILog.e("myTask", "HTTP error === " + e.getMessage());throw new Exception();}String response = null;if (httpResponse != null&& httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {HttpEntity httpEntity = httpResponse.getEntity();try {response = EntityUtils.toString(httpEntity);} catch (Exception e) {TCILog.e("myTask", "EntityUtils.toString error === " + e.getMessage());throw new Exception();} finally {try {httpEntity.consumeContent();} catch (IOException e) {TCILog.e("myTask", "httpEntity.consumeContent error === " + e.getMessage());throw new Exception();}}} else {HttpEntity httpEntity = httpResponse.getEntity();try {response = EntityUtils.toString(httpEntity);} catch (Exception e) {TCILog.e("myTask", "EntityUtils.toString === " + e.getMessage());throw new Exception();}throw new Exception();}return response;}