android 判断网络是否连接

package com.liucanwen.baidulocation.util;



import android.app.Activity;

import android.content.Context;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.widget.Toast;



public class NetworkStatus {

    public boolean netStatus = false;



    /**

     * @param args

     */

    /*public NetworkStatus(Context context) {

        try {

            ConnectivityManager connectManager = (ConnectivityManager) context

                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            NetworkInfo activeNetworkInfo = connectManager

                    .getActiveNetworkInfo();

            if (activeNetworkInfo != null) {

                if (activeNetworkInfo.isAvailable()

                        && activeNetworkInfo.isConnected()) {

                    netStatus = true;

                }

            }

        } catch (Exception e) {

            e.printStackTrace();

        }

    }*/

    public NetworkStatus(Context context) {

    ConnectivityManager con=(ConnectivityManager)context.getSystemService(Activity.CONNECTIVITY_SERVICE);  

    boolean wifi=con.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();  

    boolean internet=con.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();  

    if(internet){  

        //执行相关操作  

        netStatus=true;

        Toast.makeText(context,  

                "当前移动网络已连接！", Toast.LENGTH_LONG)  

                .show();  

    }else if(wifi){ 

        netStatus=true;

        Toast.makeText(context,  

                "当前WIFI已连接", Toast.LENGTH_LONG)  

                .show();  

    } else

    {

        Toast.makeText(context,  

                 "亲，网络连了么？", Toast.LENGTH_LONG)  

                .show(); 

    }

}

}



/*

 * 另外需要权限 <uses-permission

 * android:name="android.permission.ACCESS_NETWORK_STATE" />

 */