Network Detector

NetworkUtil.java

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

/**
 * @author yuana <[email protected]>
 * @since 12/11/17
 */

public class NetworkUtil {

    public static final String NETWORK_WIFI = "wifi_network";
    public static final String NETWORK_4G = "4g_network";
    public static final String NETWORK_3G = "3g_network";
    public static final String NETWORK_2G = "2g_network";
    public static final String NETWORK_UNKNOWN = "unknown_network";
    public static final String NETWORK_NO = "no_network";

    public static NetworkInfo getNetworkInfo(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        return cm.getActiveNetworkInfo();
    }

    public static boolean isConnected(Context context) {
        NetworkInfo info = getNetworkInfo(context);
        return (info != null && info.isConnected());
    }

    public static boolean isConnectedWifi(Context context) {
        NetworkInfo info = getNetworkInfo(context);
        return (info != null && info.isConnected() && info.getType() == ConnectivityManager.TYPE_WIFI);
    }

    public static boolean isConnectedMobile(Context context) {
        NetworkInfo info = getNetworkInfo(context);
        return (info != null && info.isConnected() && info.getType() == ConnectivityManager.TYPE_MOBILE);
    }

    public static String getNetworkType(Context context) {
        if (isConnected(context)) {
            if (isConnectedWifi(context)) {
                return NETWORK_WIFI;
            } else if (isConnectedMobile(context)) {
                switch (getType(context)) {
                    case TelephonyManager.NETWORK_TYPE_GPRS:
                    case TelephonyManager.NETWORK_TYPE_EDGE:
                    case TelephonyManager.NETWORK_TYPE_CDMA:
                    case TelephonyManager.NETWORK_TYPE_1xRTT:
                    case TelephonyManager.NETWORK_TYPE_IDEN:
                        return NETWORK_2G;
                    case TelephonyManager.NETWORK_TYPE_UMTS:
                    case TelephonyManager.NETWORK_TYPE_EVDO_0:
                    case TelephonyManager.NETWORK_TYPE_EVDO_A:
                    case TelephonyManager.NETWORK_TYPE_HSDPA:
                    case TelephonyManager.NETWORK_TYPE_HSUPA:
                    case TelephonyManager.NETWORK_TYPE_HSPA:
                    case TelephonyManager.NETWORK_TYPE_EVDO_B:
                    case TelephonyManager.NETWORK_TYPE_EHRPD:
                    case TelephonyManager.NETWORK_TYPE_HSPAP:
                        return NETWORK_3G;
                    case TelephonyManager.NETWORK_TYPE_LTE:
                        return NETWORK_4G;
                    default:
                        return NETWORK_UNKNOWN;
                }
            }
        } else {
            return NETWORK_NO;
        }
        return NETWORK_UNKNOWN;
    }

    private static int getType(Context context) {
        TelephonyManager mTelephonyManager = (TelephonyManager)
                context.getSystemService(Context.TELEPHONY_SERVICE);
        return mTelephonyManager.getNetworkType();
    }
}