!431 ui list限制开发者重复设置adapter

Merge pull request !431 from guyuanzhang/adapter

frameworks/components/ui_list.cpp

@@ -497,8 +497,12 @@ bool UIList::MoveChildStep(int16_t distance)
 
 void UIList::SetAdapter(AbstractAdapter* adapter)
 {
-    recycle_.SetAdapter(adapter);
-    recycle_.InitRecycle();
+    if (recycle_.adapter_ == nullptr) {
+        recycle_.SetAdapter(adapter);
+        recycle_.InitRecycle();
+    } else {
+        GRAPHIC_LOGE("UIList::SetAdapter adapter can only set once");
+    }
 }
 
 UIView* UIList::GetSelectView()