/**@class android.nfc.NfcAdapter.ReaderCallback A callback to be invoked when the system finds a tag while the foreground activity is operating in reader mode. <p>Register your {@code ReaderCallback} implementation with {@link android.nfc.NfcAdapter#enableReaderMode} and disable it with {@link android.nfc.NfcAdapter#disableReaderMode}. @see NfcAdapter#enableReaderMode */ var ReaderCallback = { /** */ onTagDiscovered : function( ) {}, };