Getting network state of a SIM card and subscribing to network state changes

This topic describes how to get network state of a SIM card and subscribe to network state changes.

Steps

1. Subscribe to NetworkStateListener using NetworkState.subscribeListener() method.

   //Sample code to subscribe to network state changes
   
   try {
       NetworkState.subscribeListener(this);
   }
   catch (Exception e) {
   }

2. Implement the NetworkStateListener interface by defining the NetworkStateListener.networkStateChanged() method.

   // Sample code implementing the NetworkStateListener interface
   
   public void networkStateChanged(int simIndex, int state) {
        form.append("Received  network state on SIM slot " + simIndex + " state is " + state);
   }
   

3. Get the network state of the SIM card in the second slot by calling the NetworkState.getState() method.

   //Sample code to get the network state of the SIM card in the second slot
   NetworkState.getState(1);