更新背景图

home/src/main/res/layout/activity_home.xml

@@ -21,12 +21,12 @@
             android:layout_height="match_parent"
             android:gravity="center"
             android:orientation="vertical"
-            android:background="@drawable/main_bg"
+            android:background="@drawable/main_bg_big"
             android:visibility="gone">
 
             <Button
                 android:id="@+id/btn_callout"
-                android:layout_marginTop="300dp"
+                android:layout_marginTop="360dp"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_horizontal"