Internet connectivity and Broadcast Receiver

Question

I am working on app where I do need to check if Internet connection is stabilized or not. If Internet connection is not stabilized then we need to call our web service else we will not hit that.

For that I wrote following Broadcast receiver in Java since I read that android now want developer to register this receiver in Java class.

so here it is

private class NetworkChangeBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {


           callMyWebService();


    }


 @Override
    protected void onResume() {
        super.onResume();


        if (!isNetworkBroadcastReceiverRegistered) {
            if (NetworkChangeBR == null) {
                NetworkChangeBR = new NetworkChangeBroadcastReceiver();
                registerReceiver(NetworkChangeBR, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
                isNetworkBroadcastReceiverRegistered = true;
            }
        }

        acquireWakeLock(mCustomSharedPreferences.getBoolean(CustomSharedPreferences.KEEP_SCREEN_ON_ALL_THE_TIME, false));

    }

    @Override
protected void onPause() {
    super.onPause();
    if (isNetworkBroadcastReceiverRegistered) {
        unregisterReceiver(NetworkChangeBR);
        NetworkChangeBR = null;
        isNetworkBroadcastReceiverRegistered = false;
    }
}

Problems: But I face following problems

• When I first register the receiver in my onResume method, it got automatically fired, which in return calls my webservice where as there is no internet change occur in real
• 2ndly this is only checking the Wireless connection and disconnection, but I want to get callback when wireless is finally connected to internet and when it happens the broadcast must throw callback to my application

Please help me in both cases.

Answer 1

The reason that your BroadcastReceiver is immediately triggered is because the broadcast Intent ConnectivityManager.CONNECTIVITY_ACTION is a "sticky" broadcast. This allows apps to register for and receive immediately the last broadcast event of this type (so that they can determine the current connectivity situation). If this "sticky" broadcast is causing you problems, just check for that in onReceive() and ignore it:

// Ignore the sticky broadcast of the initial state
if (isInitialStickyBroadcast()) {
    return;
}

There is a lot of data passed as "extras" in the Intent that your BroadcastReceiver gets. You can tell, for example, if the event is a CONNECT or a DISCONNECT event, etc. Check the documenttion on ConnectivityManager to determine what "extras" are sent and how to use them.