我创建了一个布局,其中我使用带有视图的循环器和嵌套的scrollview中的其他几个视图。我理解的是,如果我将循环器视图放在嵌套的scrollview中,那么渲染列表项需要时间。当我检查内部适配器时,它会多次调用onBindholder
。如果我删除嵌套的滚动视图,它工作正常。代码如下:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<include
--- ToolBar View ---/>
<include
--- Search View ---/>
<android.support.v4.widget.NestedScrollView
android:id="@+id/nested_scroll_container"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
--- Some views ---
<android.support.v7.widget.RecyclerView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_marginLeft="@dimen/margin_5"
android:layout_marginRight="@dimen/margin_5"
android:splitMotionEvents="false"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</LinearLayout>
我的适配器看起来像:
package sample.example.adapters;
public class CustomAdapter extends RecyclerView.Adapter {
private LayoutInflater mInflater;
private List<Data> list;
private ItemClickListener itemClickListener;
public void setItemClickListener(ItemClickListener itemClickListener) {
this.itemClickListener = itemClickListener;
}
public PopularConditionAdapter(Context context , List<Data> list) {
this.mInflater = LayoutInflater.from(context);
this.list = list;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.row_layout, parent, false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
ViewHolder viewHolder = (ViewHolder) holder;
Data condition = list.get(position);
if(condition != null && condition.getConditionTitle() != null) {
viewHolder.conditionName.setText(condition.getConditionTitle());
viewHolder.conditionNameInitial.setText(Tools.getUserInitial(condition.getConditionTitle()));
}
}
@Override
public int getItemCount() {
if(popularConditionList !=null)
{
return popularConditionList.size();
}else{
return 0;
}
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public View popularParentView;
public TextView conditionNameInitial;
public TextView conditionName;
public ViewHolder(View itemView) {
super(itemView);
conditionNameInitial = (TextView) itemView.findViewById(R.id.some_id);
conditionName = (TextView) itemView.findViewById(R.id.test_id);
popularParentView = itemView.findViewById(R.id.round_id);
popularParentView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (itemClickListener != null) {
itemClickListener.onItemClick(v, list.get(getPosition()));
}
}
}
public interface ItemClickListener {
void onItemClick(View view, Data condition);
}
public void reloadList(List<Data> dataList){
list.clear();
if(dataList!=null){
Iterator<Data> iterator = dataList.iterator();
while (iterator.hasNext()){
List.add(iterator.next());
}
}
}
}
我也打电话给notifyDataSetChanged
。需要一些帮助来确定我正在做的错误。
答案 0 :(得分:-1)
RecyclerView
有自己的NestedScrollView
所以我们需要使用此代码禁用该NestedScroll。
mRecyclerView.setNestedScrollingEnabled(false);