single activity

android/app/src/main/java/com/reactnativenavigation/activities/NavigationActivity.java

@@ -27,6 +27,12 @@ import java.util.List;
 public class NavigationActivity extends AppCompatActivity implements NavigationReactInstance.ReactContextCreator, DefaultHardwareBackBtnHandler {
 
     private NavigationReactInstance navigationReactInstance;
+    /**
+     * Although we start multiple activities, we make sure to pass Intent.CLEAR_TASK | Intent.NEW_TASK
+     * So that we actually have only 1 instance of the activity running at one time.
+     * We hold the currentActivity (resume->pause) so we know when we need to destroy the javascript context.
+     * This is somewhat weird, and in the future either fully support multiple activities, OR a single activity with changing contentView ala ReactNative impl.
+     */
     private static Activity currentActivity;
 
     @Override