added loading icon while video is getting fetched

code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/activities/FitnessActivity.java

@@ -129,7 +129,7 @@ public class FitnessActivity extends RobotActivity implements RobotLifecycleCall
     public void fetchExerciseAsync(Exercise.ExerciseFetchHandler onSuccessfulFetch, Exercise.ExerciseFetchHandler onFailedFetch) {
         // For some stupid reason we cannot perform network operations on the main thread.
         // therefore we'll have to do it like this...
-        (new Thread(() -> {
+        new Thread(() -> {
             Exercise exercise = ExerciseManager.fetchExerciseFromDatabase();
             if (exercise == null) {
                 onFailedFetch.handle(null);
@@ -141,6 +141,8 @@ public class FitnessActivity extends RobotActivity implements RobotLifecycleCall
                     // exerciseDescriptionTextView.setText(exercise.description);
                     exerciseVideoUrl = exercise.videoUrl;
 
+                    findViewById(R.id.loadingPanel).setVisibility(View.GONE);
+
                     // Play the video
                     VideoView videoView = findViewById(R.id.videoView);
                     playVideo(videoView, this);
@@ -156,7 +158,7 @@ public class FitnessActivity extends RobotActivity implements RobotLifecycleCall
                     });
                 });
             }
-        })).start();
+        }).start();
     }
 
     /**

code/src/Fitbot/app/src/main/res/layout/activity_fitness.xml

@@ -30,6 +30,18 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent" />
 
+            <RelativeLayout
+                android:id="@+id/loadingPanel"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:gravity="center" >
+
+                <ProgressBar
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:indeterminate="true" />
+            </RelativeLayout>
+
             <Button
                 android:id="@+id/infoButtonFitness"
                 android:layout_width="50dp"