Android 工具类判定有无网络 NetworkUtils_android网络检测工具类-优快云博客

本文链接：https://blog.youkuaiyun.com/blqs_2015/article/details/50342619

本文介绍了Android中用于检测网络连接状态的工具类NetworkUtils，包括如何检查设备是否连接到网络，是WiFi还是移动数据。通过使用NetworkUtils，开发者可以轻松地在应用中实现网络状态的判断，提升用户体验。

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public class NetworkUtils {
    /**
     * 判断当前网络是否可用
     *
     * @param context 当前Acitivity对象
     * @return 可用返回true 否则返回false
     */
    public static boolean isNetworkAvailable(Context context) {
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = manager.getActiveNetworkInfo();
        return (info != null && info.isConnected());
    }

    /**
     * 判断当前是否是wifi
     * @param context
     * @return
     */

    public static 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;
    }

    public static String int2ip(long paramLong) {
        StringBuilder localStringBuilder = new StringBuilder();
        localStringBuilder.append(paramLong & 0xFF).append(".");
        localStringBuilder.append(0xFF & paramLong >> 8).append(".");
        localStringBuilder.append(0xFF & paramLong >> 16).append(".");
        localStringBuilder.append(0xFF & paramLong >> 24);
        return localStringBuilder.toString();
    }

    /**
     * 得到wifi的ip地址
     * @param context
     * @return
     */
    public static String getIpAddress(Context context) {
        if (isWifiConnected(context)) {
            WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
            if (!wifiManager.isWifiEnabled()) {
                wifiManager.setWifiEnabled(true);
                WifiInfo wifiInfo = wifiManager.getConnectionInfo();
                int ip = wifiInfo.getIpAddress();
                return int2ip(ip);
            }
        }
        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
                 en.hasMoreElements(); ) {
                NetworkInterface inf = en.nextElement();
                for (Enumeration<InetAddress> enumeration = inf.getInetAddresses(); enumeration.hasMoreElements(); ) {
                    InetAddress address = enumeration.nextElement();
                    if (!address.isLoopbackAddress()) {
                        return address.getHostAddress().toString();
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 得到网络类型
     * @param context
     * @return one of {@link ConnectivityManager#TYPE_MOBILE}, {@link
     * ConnectivityManager#TYPE_WIFI}, {@link ConnectivityManager#TYPE_WIMAX}, {@link
     * ConnectivityManager#TYPE_ETHERNET},  {@link ConnectivityManager#TYPE_BLUETOOTH}, or other
     * types defined by {@link ConnectivityManager}
     */
    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;
    }

}