Android 网络请求get/post工具类:NetUtil

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;

    }

}