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" />
 */