Android 獲取網絡狀態的工具類

在工作中我們經常要用到網絡，網絡狀態的檢查必不可少，這是一個檢查當前網絡狀態的工具類，直接粘過去就能用</span>：

package com.todoo.android.app.utils;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
public class NetworkUtils
{
    public static final String NET_TYPE_WIFI = "WIFI";
    public static final String NET_TYPE_MOBILE = "MOBILE";
    public static final String NET_TYPE_NO_NETWORK = "no_network";

private Context mContext = null;

public NetworkUtils(Context pContext) {
    this.mContext = pContext;
}

public static final String IP_DEFAULT = "0.0.0.0";

public static boolean isConnectInternet(final Context pContext)
{
    final ConnectivityManager conManager = (ConnectivityManager) pContext.getSystemService(Context.CONNECTIVITY_SERVICE);
    final NetworkInfo networkInfo = conManager.getActiveNetworkInfo();

    if (networkInfo != null)
    {
        return networkInfo.isAvailable();
    }

    return false;
}

public static boolean isConnectWifi(final Context pContext) {
    ConnectivityManager mConnectivity = (ConnectivityManager) pContext.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo info = mConnectivity.getActiveNetworkInfo();
    //判斷網絡連接類型，只有在3G或wifi里進行一些數據更新。  
    int netType = -1;
    if(info != null){
        netType = info.getType();
    }
    if (netType == ConnectivityManager.TYPE_WIFI) {
        return info.isConnected();
    } else {
        return false;
    }
}

public static String getNetTypeName(final int pNetType)
{
    switch (pNetType)
    {
        case 0:
            return "unknown";
        case 1:
            return "GPRS";
        case 2:
            return "EDGE";
        case 3:
            return "UMTS";
        case 4:
            return "CDMA: Either IS95A or IS95B";
        case 5:
            return "EVDO revision 0";
        case 6:
            return "EVDO revision A";
        case 7:
            return "1xRTT";
        case 8:
            return "HSDPA";
        case 9:
            return "HSUPA";
        case 10:
            return "HSPA";
        case 11:
            return "iDen";
        case 12:
            return "EVDO revision B";
        case 13:
            return "LTE";
        case 14:
            return "eHRPD";
        case 15:
            return "HSPA+";
        default:
            return "unknown";
    }
}

public static String getIPAddress()
{
    try
    {
        final Enumeration<NetworkInterface> networkInterfaceEnumeration = NetworkInterface.getNetworkInterfaces();

        while (networkInterfaceEnumeration.hasMoreElements())
        {
            final NetworkInterface networkInterface = networkInterfaceEnumeration.nextElement();

            final Enumeration<InetAddress> inetAddressEnumeration = networkInterface.getInetAddresses();

            while (inetAddressEnumeration.hasMoreElements())
            {
                final InetAddress inetAddress = inetAddressEnumeration.nextElement();

                if (!inetAddress.isLoopbackAddress())
                {
                    return inetAddress.getHostAddress();
                }
            }
        }

        return NetworkUtils.IP_DEFAULT;
    }
    catch (final SocketException e)
    {
        return NetworkUtils.IP_DEFAULT;
    }
}

public String getConnTypeName() {
    ConnectivityManager connectivityManager = (ConnectivityManager) this.mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
    if(networkInfo == null) {
        return NET_TYPE_NO_NETWORK;
    } else {
        return networkInfo.getTypeName();
    }
}

}</pre></span></span>最后不要忘了加上權限：<!-- 獲取網絡狀態的權限 -->

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /></span>