onDestroy adjustment

MapboxAndroidDemo/src/main/AndroidManifest.xml

@@ -428,7 +428,8 @@
         </activity>
         <activity
             android:name=".examples.styles.TransparentBackgroundActivity"
-            android:label="@string/activity_styles_transparent_background_title">
+            android:label="@string/activity_styles_transparent_background_title"
+            android:screenOrientation="portrait">
             <meta-data
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value="com.mapbox.mapboxandroiddemo.MainActivity" />

MapboxAndroidDemo/src/main/java/com/mapbox/mapboxandroiddemo/examples/styles/TransparentBackgroundActivity.java

@@ -26,7 +26,8 @@
 import timber.log.Timber;
 
 /**
- * Create a transparent render surface and add whatever you want. This example has a moving water.
+ * Create a transparent render surface and add whatever you want to the background. This example
+ * has a video of moving water behind Earth's land.
  */
 public class TransparentBackgroundActivity extends AppCompatActivity implements OnMapReadyCallback {
 
@@ -106,11 +107,11 @@ public void onLowMemory() {
 
   @Override
   protected void onDestroy() {
-    super.onDestroy();
-    mapView.onDestroy();
-    if(null!=backgroundWaterVideoView){
+    if (backgroundWaterVideoView != null) {
       backgroundWaterVideoView.stopPlayback();
     }
+    super.onDestroy();
+    mapView.onDestroy();
   }
 
   @Override
@@ -119,6 +120,9 @@ protected void onSaveInstanceState(Bundle outState) {
     mapView.onSaveInstanceState(outState);
   }
 
+  /**
+   * Get the map style JSON from the raw file in the app's raw folder
+   */
   public static String readRawResource(Context context, @RawRes int rawResource) throws IOException {
     String json = "";
     if (context != null) {