NetworkUtil.java

package com.sxjs.common.util;

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

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.URL;
import java.util.Enumeration;

public class NetworkUtil {

    public static int NET_CNNT_BAIDU_OK = 1; // NetworkAvailable
    public static int NET_CNNT_BAIDU_TIMEOUT = 2; // no NetworkAvailable
    public static int NET_NOT_PREPARE = 3; // Net no ready
    public static int NET_ERROR = 4; //net error
    private static int TIMEOUT = 3000; // TIMEOUT


    /**
     * check NetworkAvailable
     * @param context
     * @return
     */
    public static boolean isNetworkAvailable(Context context) {
        ConnectivityManager manager = (ConnectivityManager) context.getApplicationContext().getSystemService(
                Context.CONNECTIVITY_SERVICE);
        if (null == manager)
            return false;
        NetworkInfo info = manager.getActiveNetworkInfo();
        return null != info && info.isAvailable();

    }

    /**
     * 得到ip地址
     * 
     * @return
     */
    public static String getLocalIpAddress() {
        String ret = "";
        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
                NetworkInterface intf = en.nextElement();
                for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                    InetAddress inetAddress = enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress()) {
                        ret = inetAddress.getHostAddress().toString();
                    }
                }
            }
        } catch (SocketException ex) {
            ex.printStackTrace();
        }
        return ret;
    }

    /**
     * 返回当前网络状态
     *
     * @param context
     * @return
     */
    public static int getNetState(Context context) {
        try {
            ConnectivityManager connectivity = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            if (connectivity != null) {
                NetworkInfo networkinfo = connectivity.getActiveNetworkInfo();
                if (networkinfo != null) {
                    if (networkinfo.isAvailable() && networkinfo.isConnected()) {
                        if (!connectionNetwork())
                            return NET_CNNT_BAIDU_TIMEOUT;
                        else
                            return NET_CNNT_BAIDU_OK;
                    } else {
                        return NET_NOT_PREPARE;
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return NET_ERROR;
    }

    /**
     *ping "http://www.baidu.com"
     * @return
     */
    static private boolean connectionNetwork() {
        boolean result = false;
        HttpURLConnection httpUrl = null;
        try {
            httpUrl = (HttpURLConnection) new URL("http://www.baidu.com")
                    .openConnection();
            httpUrl.setConnectTimeout(TIMEOUT);
            httpUrl.connect();
            result = true;
        } catch (IOException e) {
        } finally {
            if (null != httpUrl) {
                httpUrl.disconnect();
            }
            httpUrl = null;
        }
        return result;
    }

    /**
     * check is3G
     * @param context
     * @return boolean
     */
    public static boolean is3G(Context context) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
        if (activeNetInfo != null
                && activeNetInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
            return true;
        }
        return false;
    }

    /**
     * isWifi
     * @param context
     * @return boolean
     */
    public static boolean isWifi(Context context) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
        if (activeNetInfo != null
                && activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {
            return true;
        }
        return false;
    }

    /**
     * is2G
     * @param context
     * @return boolean
     */
    public static boolean is2G(Context context) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
        if (activeNetInfo != null
                && (activeNetInfo.getSubtype() == TelephonyManager.NETWORK_TYPE_EDGE
                || activeNetInfo.getSubtype() == TelephonyManager.NETWORK_TYPE_GPRS || activeNetInfo
                .getSubtype() == TelephonyManager.NETWORK_TYPE_CDMA)) {
            return true;
        }
        return false;
    }

    /**
     *  is wifi on
     */
    public static boolean isWifiEnabled(Context context) {
        ConnectivityManager mgrConn = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        TelephonyManager mgrTel = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        return ((mgrConn.getActiveNetworkInfo() != null && mgrConn
                .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel
                .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);
    }

}