功能优化

app/src/main/res/drawable/bg_rescan.xml

@@ -0,0 +1,11 @@
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners
+        android:bottomLeftRadius="12dp"
+        android:bottomRightRadius="12dp"
+        android:topLeftRadius="12dp"
+        android:topRightRadius="12dp" />
+    <stroke
+        android:color="#ffff9900"
+        android:width="2dp" />
+</shape>

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

@@ -116,13 +116,14 @@
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/rvFoodCollection"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="0dp"
+        android:layout_weight="1"
         android:layout_marginHorizontal="3dp"
         android:layout_marginStart="24dp"
         android:layout_marginEnd="24dp"
         app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
         app:spanCount="3"
-        tools:itemCount="6"
+        tools:itemCount="3"
         tools:listitem="@layout/list_item_food_collection" />
 
     <LinearLayout

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

@@ -78,6 +78,35 @@
         android:layout_marginHorizontal="60dp"
         android:layout_weight="1" />
 
+    <LinearLayout
+        android:id="@+id/layout_rescan"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="140dp"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="未识别出菜品，请重试或手动搜索"
+            android:textColor="@color/white"
+            android:textSize="24sp" />
+
+        <TextView
+            android:id="@+id/tv_rescan"
+            android:layout_width="180dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:background="@drawable/bg_rescan"
+            android:gravity="center"
+            android:padding="10dp"
+            android:text="重试"
+            android:textColor="#ffff9900"
+            android:textSize="32sp" />
+    </LinearLayout>
+
     <TextView
         android:id="@+id/tv_to_search"
         android:layout_width="wrap_content"

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

@@ -12,9 +12,10 @@
         android:id="@+id/tv_name"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="肉沫干拌面"
-        android:maxLines="1"
         android:ellipsize="end"
+        android:gravity="center"
+        android:maxLines="2"
+        android:text="肉沫干拌面"
         android:textColor="#ff031127"
         android:textSize="36sp" />