Broadcast Receiver And Internet Connection

How do I use broadcast receiver to check if there isn't Internet connection? And after that: 1.If there is connection = do nothing 2.There isn't connection = open new activity I ho

Solution 1:

ConnectivityManager provides calls by which you can check for internet connectivity.

If you want to listen for a change in connectivity, create a listener that reacts to ConnectivityManager.CONNECTIVITY_ACTION

Solution 2:

Create a file to your project as ... and copy paste following code into this file

package your.package.name; //Change it as your package name

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.widget.Toast;

public class NetworkChangeReceiver extends BroadcastReceiver {

    public static int TYPE_WIFI = 1;
    public static int TYPE_MOBILE = 2;
    public static int TYPE_NOT_CONNECTED = 0;

    @Override
    public void onReceive(final Context context, final Intent intent) {

        String status = getConnectivityStatusString(context);

        Toast.makeText(context, status, Toast.LENGTH_LONG).show();
    }

    public static int getConnectivityStatus(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context
            .getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        if (null != activeNetwork) {
            if(activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
                return TYPE_WIFI;

            if(activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
                return TYPE_MOBILE;
        } 
        return TYPE_NOT_CONNECTED;
    }

    public static String getConnectivityStatusString(Context context) {
        int conn = getConnectivityStatus(context);
        String status = null;
        if (conn == TYPE_WIFI) {
        status = "Wifi enabled";
        } else if (conn == TYPE_MOBILE) {
            status = "Mobile data enabled";
        } else if (conn == TYPE_NOT_CONNECTED) {
            status = "Not connected to Internet";
        }
        return status;
    }
}

And add following to Manifest file in application tag

<application  ...>
 ...
    <receiver
        android:name="your.package.name.NetworkChangeReceiver" //Change it as your-package-name.NetworkChangeReceiver
        android:label="NetworkChangeReceiver" >
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
        </intent-filter>
    </receiver>
  ...
</application>

After running your application you will see Toast Message if network state change.