head问题已解决

app/src/main/java/com/example/ninefourone/nutritionmaster/modules/viewpagerfragments/recommend/RecommendFragment.java

@@ -99,12 +99,16 @@ public class RecommendFragment extends BaseFragment {
         manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
             @Override
             public int getSpanSize(int position) {
-                if (adapter.getItemViewType(position) == RecommendFood.TYPE_BIG ||
-                        adapter.getItemViewType(position) == RecommendFood.TYPE_DETAIL) {
-//                    Logger.d(manager.getSpanCount());
+                if (position == 0) {
                     return 2;
                 } else {
-                    return 1;
+                    if (adapter.getItemViewType(position) == RecommendFood.TYPE_BIG ||
+                            adapter.getItemViewType(position) == RecommendFood.TYPE_DETAIL) {
+//                    Logger.d(manager.getSpanCount());
+                        return 2;
+                    } else {
+                        return 1;
+                    }
                 }
             }
         });

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

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <ImageView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="140dp"
-    android:background="@color/colorPrimary"
+    android:layout_height="135dp"
+    android:scaleType="fitXY"
     android:src="@drawable/recommend_bg">
 
 </ImageView>