ConnectivityManager.CONNECTIVITY_ACTION get network disconected from in API >= 14?

Question

I need to get the network from which device was disconnected.

Now I use:

NetworkInfo ni =intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);

And check:

ni.isConnected()

if this returns false ni - is the network from which the device was disconnected.

But ConnectivityManager.EXTRA_NETWORK_INFO is deprecated in API 14. Google says use getActiveNetworkInfo() to get network information. But getActiveNetworkInfo() always returns network with which the device is connected now (isConnected() must return true)!

How do I get the network info for the network the device disconnected from without using ConnectivityManager.EXTRA_NETWORK_INFO?

Sertorio Noronha, when I use getActiveNetworkInfo() I only get the network to which I am connected now! But I need to get the network from which I was disconnected.

ConnectivityManager cm = (ConnectivityManager)
    context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo n1 = cm.getActiveNetworkInfo();
Log.d("tets", String.format("%s: %s", n1.getTypeName(), n1.isConnected()));

When I disconnect from WI-FI and connect to 3G in log:

mobile: true
mobile: true

When I disconnect from 3G and connect to WI-FI in log:

WIFI: true
WIFI: true
WIFI: true

getActiveNetworkInfo returns only the network connected to now, but does not return the network from which I was disconnected.

If I use deprecated intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO) in log I see:

When I disconnect from WI-FI and connect to 3G:

WIFI: false
mobile: true

When I disconnect from 3G and connect to WI-FI:

mobile: false
WIFI: true

But I do not want to use deprecated api. How to use modern api to get network from which I was disconnected?

Homophile

Answer 1

You can use the following

ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
int networkType = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_TYPE);
boolean isWiFi = networkType == ConnectivityManager.TYPE_WIFI;
boolean isMobile = networkType == ConnectivityManager.TYPE_MOBILE;
NetworkInfo networkInfo = connectivityManager.getNetworkInfo(networkType);
boolean isConnected = networkInfo.isConnected();

if (isWiFi) {
    if (isConnected) {
        Log.i("APP_TAG", "Wi-Fi - CONNECTED");
    } else {
        Log.i("APP_TAG", "Wi-Fi - DISCONNECTED");
    }
} else if (isMobile) {
    if (isConnected) {
        Log.i("APP_TAG", "Mobile - CONNECTED");
    } else {
        Log.i("APP_TAG", "Mobile - DISCONNECTED");
    }
} else {
    if (isConnected) {
        Log.i("APP_TAG", networkInfo.getTypeName() + " - CONNECTED");
    } else {
        Log.i("APP_TAG", networkInfo.getTypeName() + " - DISCONNECTED");
    }
}

Meristic

use extras.getInt for EXTRA_NETWORK_TYPE also this field was introduced in API 17 – Silures

Answer 2

You can get the instance of NetworkInfo through the Context.

ConnectivityManager connectivityManager = ((ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE));
NetworkInfo currentNetworkInfo = connectivityManager.getActiveNetworkInfo();

if(currentNetworkInfo != null && currentNetworkInfo.isConnected()){
   // Your logic goes in here
}

Ligulate

Please use getTypeName() from the class NetworkInfo. developer.android.com/reference/android/net/NetworkInfo.html – Ligulate

Your response does not answer my question! Look at topic header, I provide additional info. – Homophile

A very easy solution will be to store the previous value in a local String. Your problem can be solved with simple logic. – Ligulate

this was the solution for me, since i needed api level 14-16 too – Steenbok

Answer 3

Working non deprecated code

/**Receiver*/   

 public class NetworkStateReceiver extends BroadcastReceiver {

        /*
         * @see android.content.BroadcastReceiver#onReceive(android.content.Context,
         * android.content.Intent)
         */
        @Override
        public void onReceive(Context context, Intent intent) {
            ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
            int networkType = intent.getExtras().getInt(ConnectivityManager.EXTRA_NETWORK_TYPE);
            boolean isWiFi = networkType == ConnectivityManager.TYPE_WIFI;
            boolean isMobile = networkType == ConnectivityManager.TYPE_MOBILE;
            NetworkInfo networkInfo = connectivityManager.getNetworkInfo(networkType);
            boolean isConnected = networkInfo.isConnected();

            if (isWiFi) {
                if (isConnected) {
                    Log.i("APP_TAG", "Wi-Fi - CONNECTED");
                } else {
                    Log.i("APP_TAG", "Wi-Fi - DISCONNECTED");
                }
            } else if (isMobile) {
                if (isConnected) {
                    Log.i("APP_TAG", "Mobile - CONNECTED");
                } else {
                    Log.i("APP_TAG", "Mobile - DISCONNECTED");
                }
            } else {
                if (isConnected) {
                    Log.i("APP_TAG", networkInfo.getTypeName() + " - CONNECTED");
                } else {
                    Log.i("APP_TAG", networkInfo.getTypeName() + " - DISCONNECTED");
                }
            }
        }

    }

And in manifest

<!-- Receiver registration in manifest -->
     <receiver android:name="com.xxx.yyy.NetworkStateReceiver" >
                <intent-filter>
                    <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
                </intent-filter>
            </receiver>

and

<!-- Internet permission for network comunication -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Koski

android.net.conn.CONNECTIVITY_CHANGE is deprecated in Android N - FYI – Cumulous

Thanks for comment this has been written ver long days back will update as per new Android N soon – Koski

@Cumulous I thought CONNECTIVITY_ACTION was depcrecated in Android N ? developer.android.com/preview/behavior-changes.html – Churchless

Its not deprecated, it will only trigger apps that are foreground and listening. If your app registered for this event and is stopped or in background it wont be notified. – Twombly