Help with a BraodcastReceiver

[r2sjoblom]

My situation is that I want to call a particular method to get called from ClassA from inside my ClassB which extends the BroadcastReceiver class. I understand how to do this from inside another class file etc and how to setup the BroadcastReceiver, or so I thought.
Below is the class file that extends the BroadcastReceiver.

 public class WatchPhone extends BroadcastReceiver {
private ClassA classA = new ClassA(); 
 
@Override 
public void onReceive(Context context, Intent BackToMain) { 
    // TODO Auto-generated method stub 
    TelephonyManager telephony = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);  
    int state = telephony.getCallState();  
    switch(state) {  
        case TelephonyManager.CALL_STATE_RINGING: 
            Log.d("TestServiceReceiver", "IDLE");  
            classA.IwantToDoThis(); 
            break;  
    } 
}

The method that I am trying to call does work great in the application if I manually request it. In my AndroidManifest.xml I added this

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

and this at the bottom just above the closing application tag.

            <receiver android:name=".WatchPhone"> 
                    <intent-filter>  
                    <action android:name="android.intent.action.PHONE_STATE" />  
                    </intent-filter>  
            </receiver>

When the phone rings, the application crashes then closes. Any ideas on what I should do.