我有一个带有header view as slider images的Recyclerview，剩下的视图为normal recycler items。我想知道是否有任何方法可以根据某种情况使标题视图不可见。回收者视图包含为此目的使用两个单独的布局文件：标题项为layout1，普通回收项为layout2，适配器将选择布局并在运行时绑定相应的数据。
这是我的RecyclerView适配器RestaurantAdapter.java
public class RestaurantAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final String TAG = RestaurantAdapter.class.getName();
private List<Restaurant> mList;
private Context mContext;
private RestaurantType mRestaurantType;
private static final int RECYCLER_HEADER=0,RECYCLER_ITEMS=1;
private LayoutInflater inflater;
private SlideItemViewHolder slideItemViewHolder;
private List<ImageSliderPOJO> mData;
public RestaurantAdapter(Context context, List<Restaurant> list, RestaurantType restaurantType) {
this.mContext = context;
this.mList = list;
this.mRestaurantType = restaurantType;
inflater=LayoutInflater.from(context);
}
public void updateAdapter(List<ImageSliderPOJO> data){
this.mData = data;
this.notifyDataSetChanged();
}
@Override
public int getItemCount() {
return mList.size();
}
@Override
public int getItemViewType(int position) {
return position == 0 ? RECYCLER_HEADER : RECYCLER_ITEMS;
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder viewHolder, final int i) {
int viewType=viewHolder.getItemViewType();
switch (viewType){
case RECYCLER_HEADER:
slideItemViewHolder = (SlideItemViewHolder) viewHolder;
slideItemViewHolder.updateHeader();
break;
case RECYCLER_ITEMS:
final RecyclerItemViewHolder holder = (RecyclerItemViewHolder) viewHolder;
final Restaurant restaurant = mList.get(i);
Picasso.with(mContext)
.load(restaurant.getVendorLogo())
.placeholder(R.mipmap.ic_launcher)
.error(R.mipmap.ic_launcher)
.into(holder.restaurentImageView);
holder.restaurentNameTextView.setText(restaurant.getName());
//Remaining code here
break;
default:
throw new RuntimeException(TAG+":Unable to bind the viewType"+viewType);
}
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
switch (viewType){
case RECYCLER_HEADER:
return new SlideItemViewHolder(inflater.inflate(R.layout.slide_show_restaurant_fragment_list,viewGroup,false));
case RECYCLER_ITEMS:
return new RecyclerItemViewHolder(inflater.inflate(R.layout.new_restautant_list_items, viewGroup, false));
default:
throw new RuntimeException(TAG+":Invalid ViewType "+viewType);
}
}
public static class RecyclerItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private ClickListener clickListener;
//Initialization here.
public RecyclerItemViewHolder(View v) {
super(v);
ButterKnife.inject(this, v);
v.setOnClickListener(this);
}
@Override
public void onClick(View v) {
clickListener.onClick(v, getPosition(), false);
}
public interface ClickListener {
/**
* Called when the view is clicked.
*
* @param v view that is clicked
* @param position of the clicked item
* @param isLongClick true if long click, false otherwise
*/
public void onClick(View v, int position, boolean isLongClick);
}
/* Setter for listener. */
public void setClickListener(ClickListener clickListener) {
this.clickListener = clickListener;
}
}
// id = 87,170
private class SlideItemViewHolder extends RecyclerView.ViewHolder {
SliderLayout sliderLayout;
LinearLayout rootLinearLayout;
public SlideItemViewHolder(View recyclerHeader) {
super(recyclerHeader);
sliderLayout = (SliderLayout) recyclerHeader.findViewById(R.id.home_slider);
rootLinearLayout = (LinearLayout) recyclerHeader.findViewById(R.id.rootLinearLayout);
}
private void updateHeader() {
if(Util.isNetworkAvailable(mContext)){
for (int i = 0; i < mData.size(); i++) {
DefaultSliderView defaultSliderView = new DefaultSliderView(mContext);
final int finalI = i;
defaultSliderView.image(mData.get(finalI).getImageUrl())
.setOnSliderClickListener(new BaseSliderView.OnSliderClickListener() {
@Override
public void onSliderClick(BaseSliderView slider) {
Restaurant restaurantById = Restaurant.searchByRestaurantId(mData.get(finalI).getTargetVendorId());
if(restaurantById != null)
openDetailFragment(restaurantById);
}
});
sliderLayout.addSlider(defaultSliderView);
}
}
}
}
public void openDetailFragment(Restaurant restaurant) {
Intent intent = new Intent(mContext, DetailTabActivity.class);
intent.putExtra(DetailTabActivity.INTENT_RESTAURANT_DATA, restaurant);
mContext.startActivity(intent);
}
public SliderLayout getSliderLayout(){
return slideItemViewHolder.sliderLayout;
}
}
此适配器已从此片段RestaurantFragment.java设置并更新为：
private void setAdapter() {
dismissDialog();
if (getActivity() != null)
getActivity().runOnUiThread(new Runnable(){
@Override
public void run() {
if (restaurantList != null && restaurantList.size() > 0) {
restaurantRecyclerView.setVisibility(View.VISIBLE);
mEmptyListTextView.setVisibility(View.GONE);
restaurentListAdapter = new RestaurantAdapter(getActivity(), restaurantList, mRestaurantType);
restaurantRecyclerView.setAdapter(restaurentListAdapter);
restaurentListAdapter.updateAdapter(mData);
restaurantRecyclerView.addOnScrollListener(new EndlessRecyclerOnScrollListener(mLayoutManager) {
@Override
public void onLoadMore(int current_page) {
mCurrentPage = mCurrentPage + 1;
getHttpResturantData();
}
});
}
}
});
}
这些解释是否有用，还是应该粘贴更多代码？
答案 0 :(得分：2)
根据您的代码，可以根据特定条件删除标题。
调整代码以满足以下条件：
btnEjecutar.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
//the function
generarDocumento(nombre);
}
此代码也需要更改（目前这是错误的，因为它没有考虑标题为位置添加1的事实。）
@Override
public int getItemViewType(int position) {
if(hasHeaeder()) { // where you add the header
return position == 0 ? RECYCLER_HEADER : RECYCLER_ITEMS;
} else { // where you don't add the header
return RECYCLER_ITEMS;
}
}
将其替换为
final Restaurant restaurant = mList.get(i);
final Restaurant restaurant = hasHeader() ? mList.get(i +1) : mList.get(i);
是您需要编写的代码，以确定回收者是否应该包含标题。