NetworkState.java

package cn.fanfan.common;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

/*��ȡ������Ϣ��Ҫ��AndroidManifest.xml�ļ��м�����Ӧ��Ȩ�ޡ�

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />*/
public class NetworkState {
	/*1���ж��Ƿ�����������*/
	public boolean isNetworkConnected(Context context) {  
	    if (context != null) {  
	        ConnectivityManager mConnectivityManager = (ConnectivityManager) context  
	                .getSystemService(Context.CONNECTIVITY_SERVICE);  
	        NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();  
	        if (mNetworkInfo != null) {  
	            return mNetworkInfo.isAvailable();  
	        }  
	    }  
	    return false;  
	}
	/*2���ж�WIFI�����Ƿ����*/
	public boolean isWifiConnected(Context context) {  
	    if (context != null) {  
	        ConnectivityManager mConnectivityManager = (ConnectivityManager) context  
	                .getSystemService(Context.CONNECTIVITY_SERVICE);  
	        NetworkInfo mWiFiNetworkInfo = mConnectivityManager  
	                .getNetworkInfo(ConnectivityManager.TYPE_WIFI);  
	        if (mWiFiNetworkInfo != null) {  
	            return mWiFiNetworkInfo.isAvailable();  
	        }  
	    }  
	    return false;  
	}
	/*4����ȡ��ǰ�������ӵ�������Ϣ*/
	public static int getConnectedType(Context context) {  
	    if (context != null) {  
	        ConnectivityManager mConnectivityManager = (ConnectivityManager) context  
	                .getSystemService(Context.CONNECTIVITY_SERVICE);  
	        NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();  
	        if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {  
	            return mNetworkInfo.getType();  
	        }  
	    }  
	    return -1;  
	}
}