question: public void registerReceiver ( BroadcastReceiver receiver , IntentFilter filter ) { synchronized ( mReceivers ) { ReceiverRecord entry = new ReceiverRecord ( filter , receiver ) ; ArrayList < IntentFilter > filters = mReceivers . get ( receiver ) ; if ( filters == null ) { filters = new ArrayList < IntentFilter > ( 1 ) ; mReceivers . put ( receiver , filters ) ; } filters . add ( filter ) ; for ( int i = 0 ; i < filter . countActions ( ) ; i ++ ) { String action = filter . getAction ( i ) ; ArrayList < ReceiverRecord > entries = mActions . get ( action ) ; if ( entries == null ) { entries = new ArrayList < ReceiverRecord > ( 1 ) ; mActions . put ( action , entries ) ; } entries . add ( entry ) ; } } }
target:  Register a receive for any local broadcasts that match the given IntentFilter.