NetStateUtil.java

package com.finddreams.baselib.http;

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

import com.finddreams.baselib.service.ServiceManager;
/**
 * @Description:检查网络状态的工具类
 * @author http://blog.csdn.net/finddreams
 */ 
public class NetStateUtil {

	/**
	 * Check current network whether available
	 * @param context
	 * @return
	 */
	public static boolean checkNet(Context context) {

		ConnectivityManager manager = ServiceManager.getConnectivityManager(context);
		NetworkInfo info = manager.getActiveNetworkInfo();
		if (info != null && info.isAvailable() && info.isConnected()) {
			return true;
		}else {
			return false;
		}
	}

    /**
     * Judge network  whether Wifi connectivity
     * @param context
     * @return
     */
	public static boolean isWifi(Context context) {
        ConnectivityManager manager = ServiceManager.getConnectivityManager(context);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();
        if (networkInfo != null) {
        	int type = networkInfo.getType();
        	if (networkInfo.isAvailable() && networkInfo.isConnected() && type == ConnectivityManager.TYPE_WIFI ) {
        		return true;
        	}
        }
		return false;
	}
    /**
     * 判断当前网络是否是移动流量连接
     * @param context
     * @return
     */
    public static  boolean  isMobile(Context context) {
        ConnectivityManager manager = ServiceManager.getConnectivityManager(context);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();
        if (networkInfo != null) {
        	int type = networkInfo.getType();
        	if (networkInfo.isAvailable() && networkInfo.isConnected() && type == ConnectivityManager.TYPE_MOBILE) {
        		return true;
        	}
        }
        return false;
    }

    /**
     * Whether open wifi
     * @param context
     * @return
     */
    public static boolean isWifiEnabled(Context context) {
        ConnectivityManager mgrConn = ServiceManager.getConnectivityManager(context);
        TelephonyManager mgrTel = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        return ((mgrConn.getActiveNetworkInfo() != null && mgrConn
                .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel
                .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);
    }
    /**
	 * 判断当前是否有可用的网络以及网络类型 0：无网络 1：WIFI 2：CMWAP 3：CMNET
	 * 
	 * @param context
	 * @return
	 */
	public static int isNetworkAvailable(Context context) {
		ConnectivityManager connectivity = (ConnectivityManager) context
				.getSystemService(Context.CONNECTIVITY_SERVICE);
		if (connectivity == null) {
			return 0;
		} else {
			NetworkInfo[] info = connectivity.getAllNetworkInfo();
			if (info != null) {
				for (int i = 0; i < info.length; i++) {
					if (info[i].getState() == NetworkInfo.State.CONNECTED) {
						NetworkInfo netWorkInfo = info[i];
						if (netWorkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
							return 1;
						} else if (netWorkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
							String extraInfo = netWorkInfo.getExtraInfo();
							if ("cmwap".equalsIgnoreCase(extraInfo)
									|| "cmwap:gsm".equalsIgnoreCase(extraInfo)) {
								return 2;
							}
							return 3;
						}
					}
				}
			}
		}
		return 0;
	}

}