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package com.net.util;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.List;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.NameValuePair;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.client.methods.HttpUriRequest;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;import org.json.JSONException;import org.json.JSONObject;import android.content.Context;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.util.Log;import android.widget.Toast;public class NetUtil { private static final String TAG = "NetUtil"; /** * 网络连接是否可用 */ public static boolean isConnnected(Context context) { ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); if (null != connectivityManager) { NetworkInfo networkInfo[] = connectivityManager.getAllNetworkInfo(); if (null != networkInfo) { for (NetworkInfo info : networkInfo) { if (info.getState() == NetworkInfo.State.CONNECTED) { Log.e(TAG, "the net is ok"); return true; } } } } Toast.makeText(context, "网络连接失败", Toast.LENGTH_SHORT).show(); return false; } /** * 网络可用状态下，通过get方式向server端发送请求，并返回响应数据 * * @param strUrl 请求网址 * @param context 上下文 * @return 响应数据 */ public static JSONObject getResponseForGet(String strUrl, Context context) { if (isConnnected(context)) { return getResponseForGet(strUrl); } return null; } /** * 通过Get方式处理请求，并返回相应数据 * * @param strUrl 请求网址 * @return 响应的JSON数据 */ public static JSONObject getResponseForGet(String strUrl) { HttpGet httpRequest = new HttpGet(strUrl); return getRespose(httpRequest); } /** * 网络可用状态下，通过post方式向server端发送请求，并返回响应数据 * * @param market_uri 请求网址 * @param nameValuePairs 参数信息 * @param context 上下文 * @return 响应数据 */ public static JSONObject getResponseForPost(String market_uri, List<NameValuePair> nameValuePairs, Context context) { if (isConnnected(context)) { return getResponseForPost(market_uri, nameValuePairs); } return null; } /** * 通过post方式向服务器发送请求，并返回响应数据 * * @param strUrl 请求网址 * @param nameValuePairs 参数信息 * @return 响应数据 */ public static JSONObject getResponseForPost(String market_uri, List<NameValuePair> nameValuePairs) { if (null == market_uri || "" == market_uri) { return null; } HttpPost request = new HttpPost(market_uri); try { request.setEntity(new UrlEncodedFormEntity(nameValuePairs)); return getRespose(request); } catch (UnsupportedEncodingException e1) { e1.printStackTrace(); } return null; } /** * 响应客户端请求 * * @param request 客户端请求get/post * @return 响应数据 */ public static JSONObject getRespose(HttpUriRequest request) { try { HttpResponse httpResponse = new DefaultHttpClient().execute(request); int statusCode = httpResponse.getStatusLine().getStatusCode(); if (HttpStatus.SC_OK == statusCode) { String result = EntityUtils.toString(httpResponse.getEntity()); Log.i(TAG, "results=" + result); return new JSONObject(result); } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (JSONException e) { e.printStackTrace(); } return null; }}Android 网络请求get/post工具类:NetUtil
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原文地址：http://www.cnblogs.com/lzjsky/p/5035214.html
