adjust preview view to main view

Author: mwarning

app/src/main/res/layout/activity_image.xml

@@ -20,8 +20,8 @@
             android:id="@+id/selectedImage"
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
+            android:layout_gravity="center"
             android:adjustViewBounds="true"
-            android:scaleType="fitCenter"
             android:orientation="vertical" />
 
     </LinearLayout>