增加了启动Loading图，解决启动黑屏的问题

modules/mogo-module-main/src/main/res/layout/module_main_activity_main.xml

@@ -104,6 +104,6 @@
     <FrameLayout
         android:id="@+id/module_main_id_cover_up"
         android:layout_width="match_parent"
-        android:background="@color/color_1C1C1C"
+        android:background="@drawable/module_main_launcher_bg"
         android:layout_height="match_parent"/>
 </FrameLayout>

modules/mogo-module-main/src/main/res/values/styles.xml

@@ -7,7 +7,7 @@
         <item name="android:windowEnterAnimation">@null</item>
         <item name="android:windowExitAnimation">@null</item>
         <item name="android:windowContentOverlay">@null</item>
-        <item name="android:windowBackground">@color/module_main_window_background_color</item>
+        <item name="android:windowBackground">@drawable/module_main_launcher_bg</item>
         <item name="android:windowTranslucentNavigation">false</item>
         <item name="android:windowAnimationStyle">@style/MainAnimation</item>
         <item name="checkboxStyle">@style/noCheckboxStyle</item>