how to check wifi or 3g network is available on android device

Question

Here, my android device supports both wifi and 3g. At particular time which network is available on this device. Because my requirement is when 3g is available I have to upl

Answer 1

I use this:

/**
 * Checks if we have a valid Internet Connection on the device.
 * @param ctx
 * @return True if device has internet
 *
 * Code from: http://www.androidsnippets.org/snippets/131/
 */
public static boolean haveInternet(Context ctx) {

    NetworkInfo info = (NetworkInfo) ((ConnectivityManager) ctx
            .getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();

    if (info == null || !info.isConnected()) {
        return false;
    }
    if (info.isRoaming()) {
        // here is the roaming option you can change it if you want to
        // disable internet while roaming, just return false
        return false;
    }
    return true;
}

You also need

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

in AndroidMainfest.xml

To get the network type you can use this code snippet:

ConnectivityManager conMan = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

//mobile
State mobile = conMan.getNetworkInfo(0).getState();

//wifi
State wifi = conMan.getNetworkInfo(1).getState();

and then use it like that:

if (mobile == NetworkInfo.State.CONNECTED || mobile == NetworkInfo.State.CONNECTING) {
    //mobile
} else if (wifi == NetworkInfo.State.CONNECTED || wifi == NetworkInfo.State.CONNECTING) {
    //wifi
}

To get the type of the mobile network I would try TelephonyManager#getNetworkType or NetworkInfo#getSubtypeName

Answer 2

You can use this method to check whether your internet connection is 2G, 3G or 4G:

public String getNetworkClass(Context context) {
    TelephonyManager mTelephonyManager = (TelephonyManager)
        context.getSystemService(Context.TELEPHONY_SERVICE);
    int networkType = mTelephonyManager.getNetworkType();
    switch (networkType) {
        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 "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 "3G";
        case TelephonyManager.NETWORK_TYPE_LTE:
            return "4G";
        default:
            return "Unknown";
    }
}

And using following method you can check if internet is available or not, and get whether you are accessing the internet via a mobile network or WiFi:

public String getNetworkType(Context context){
    String networkType = null;
    ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetwork = connectivityManager.getActiveNetworkInfo();
    if (activeNetwork != null) { // connected to the internet
        if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
                networkType = "WiFi";
        } else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
            networkType = "Mobile";
        }
    } else {
        // not connected to the internet
    }
    return networkType;
}

Answer 3

You need to add below permission in android manifest file:

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

After that you can use below functions to check wifi or mobile network is connected or not

public static boolean isWifiConnected(Context context) {
        ConnectivityManager connManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        return ((netInfo != null) && netInfo.isConnected());
    }

public static boolean isMobileConnected(Context context) {
        ConnectivityManager connManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        return ((netInfo != null) && netInfo.isConnected());
    }

Some references from developer.android.com are:

1. https://developer.android.com/reference/android/net/ConnectivityManager.html
2. https://developer.android.com/reference/android/net/NetworkInfo.html
3. https://developer.android.com/reference/android/net/ConnectivityManager.html#getActiveNetworkInfo()

Answer 4

First get a reference to the ConnectivityManager and then check the Wifi and 3G status of the device. You'll need the ACCESS_NETWORK_STATE permission to use this service.

    ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
    NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
    NetworkInfo mMobile = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

    if (mWifi.isAvailable() == true) {
        return "Connected to WiFi";
    } else if (mMobile.isAvailable() == true) {
        return "Connected to Mobile Network";
    } else return "No internet Connection"