优化列表请求失败和没有网络的显示状态，优化渐变颜色展示

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

@@ -88,8 +88,41 @@
             android:paddingBottom="16dp"/>
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
+    <!-- 空页面 -->
+    <LinearLayout
+        android:id="@+id/layoutNoPermission"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <ImageView
+            android:layout_width="244dp"
+            android:layout_height="131dp"
+            android:src="@mipmap/default_page"/>
+
+    </LinearLayout>
+    <LinearLayout
+        android:id="@+id/layoutNoNetwork"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:paddingHorizontal="32dp"
+        android:background="@color/white"
+        android:visibility="gone">
+
+        <ImageView
+            android:layout_width="244dp"
+            android:layout_height="131dp"
+            android:src="@mipmap/no_network_img_name" />
+
+    </LinearLayout>
+
     <!-- 底部按钮 -->
     <LinearLayout
+        android:id="@+id/butting"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingHorizontal="16dp"

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

@@ -168,6 +168,22 @@
                 android:src="@mipmap/default_page" />
 
         </LinearLayout>
+        <LinearLayout
+            android:id="@+id/layoutNoNetwork"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:paddingHorizontal="32dp"
+            android:background="@color/white"
+            android:visibility="gone">
+
+            <ImageView
+                android:layout_width="244dp"
+                android:layout_height="131dp"
+                android:src="@mipmap/no_network_img_name" />
+
+        </LinearLayout>
     </LinearLayout>
 
     <View

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

@@ -112,6 +112,22 @@
                     android:src="@mipmap/default_page"/>
 
             </LinearLayout>
+            <LinearLayout
+                android:id="@+id/layoutNoNetwork"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:orientation="vertical"
+                android:paddingHorizontal="32dp"
+                android:background="@color/white"
+                android:visibility="gone">
+
+                <ImageView
+                    android:layout_width="244dp"
+                    android:layout_height="131dp"
+                    android:src="@mipmap/no_network_img_name" />
+
+            </LinearLayout>
 
         </FrameLayout>
 

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

@@ -58,7 +58,23 @@
         <ImageView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:src="@mipmap/no_message" />
+            android:src="@mipmap/default_page_img_name" />
+    </LinearLayout>
+    <LinearLayout
+        android:id="@+id/layoutNoNetwork"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:paddingHorizontal="32dp"
+        android:background="@color/white"
+        android:visibility="gone">
+
+        <ImageView
+            android:layout_width="244dp"
+            android:layout_height="131dp"
+            android:src="@mipmap/no_network_img_name" />
+
     </LinearLayout>
 
     <TextView

app/src/main/res/values/colors.xml

@@ -20,5 +20,7 @@
     <color name="green_light">#E8F7F7</color>
     <color name="gray_divider">#E5E5E5</color>
     <color name="orange">#FF9800</color>
+    <color name="gradientLayout1">#EBDCED</color>
+    <color name="gradientLayout2">#CAF4FF</color>
 
 </resources>