union接口bug fix

app/src/main/java/com/info666/app/infraredRemote/activity/InfraredRemoteActivity.java

@@ -90,6 +90,7 @@ public class InfraredRemoteActivity extends AppCompatActivity {
             startActivityForResult(intent,Activity.RESULT_FIRST_USER);
         }
 
+        @JavascriptInterface
         public String getChannel(){
             return ChannelReaderUtil.getChannel(this.context.getApplicationContext());
         }