我的 Recyclerview 是第一次按我的要求加载，但是当我滚动它时，我的所有项目都变得不可见，请找到我所面临问题的附件视频在此先感谢，https://drive.google.com/open?id=1A695imvTIYYhUlIqcFL2o4k_UZak7wUu
这是我的fragment_offer.xml 的样子
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
tools:context=".views.fragments.OfferFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android">
<androidx.recyclerview.widget.RecyclerView
tools:context=".views.fragments.OfferFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rvOffers"
android:clipToPadding="false">
</androidx.recyclerview.widget.RecyclerView>
</RelativeLayout>
这就是我的 OfferAdapter 的样子。
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public class OfferAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private List<Offer> mList;
private Context mContext;
private static final int OFFER_TYPE = 1;
private static final int HEADER_TYPE = 0;
public OfferAdapter(Context context, List<Offer> list) {
mList = list;
mContext = context;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
RecyclerView.ViewHolder viewHolder = null;
if(viewType == HEADER_TYPE){
View view = LayoutInflater.from(mContext).inflate(R.layout.layout_sort_search,null);
viewHolder = new HeaderViewHolder(view);
}
else if(viewType == OFFER_TYPE){
View view = LayoutInflater.from(mContext).inflate(R.layout.trailer_offer_item,null);
viewHolder = new OfferViewHolder(view);
}
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
if(getItemViewType(position) == HEADER_TYPE){
HeaderViewHolder headerViewHolder = (HeaderViewHolder) holder;
headerViewHolder.imgSort.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(mContext,"Sort clicked",Toast.LENGTH_LONG).show();
}
});
headerViewHolder.rlSearch.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(mContext,"search clicked",Toast.LENGTH_LONG).show();
}
});
}
else {
Offer offer = mList.get(position-1);
OfferViewHolder offerViewHolder = (OfferViewHolder) holder;
offerViewHolder.tvTitle.setText(offer.getOfferName());
offerViewHolder.tvSubTitle.setText(offer.getOfferDescription());
Utility.loadImage(mContext,offer.getMobileImage(),offerViewHolder.imgOffer);
}
}
@Override
public int getItemCount() {
return mList.size() + 1;
}
@Override
public int getItemViewType(int position) {
if(position == 0){
return HEADER_TYPE;
}
else {
return OFFER_TYPE;
}
}
public void setOffers(RealmResults<Offer> offersList) {
}
public class HeaderViewHolder extends RecyclerView.ViewHolder{
private RelativeLayout rlSearch;
private ImageButton imgSort;
public HeaderViewHolder(@NonNull View itemView) {
super(itemView);
imgSort = itemView.findViewById(R.id.ibSort);
rlSearch = itemView.findViewById(R.id.rlSearch);
}
}
public class OfferViewHolder extends RecyclerView.ViewHolder{
private final TextView tvSubTitle;
private final TextView tvTitle;
private final ImageView imgOffer;
public OfferViewHolder(@NonNull View itemView) {
super(itemView);
tvTitle = itemView.findViewById(R.id.tvOfferTitle);
tvSubTitle = itemView.findViewById(R.id.tvOfferSubtitle);
imgOffer = itemView.findViewById(R.id.imgOffer);
}
}
}
这是我的OfferFragment.java 的样子
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public class OfferFragment extends BaseFragment {
private RecyclerView rvOffers;
private RealmResults<Offer> offers;
private OfferAdapter offersAdapter;
public OfferFragment() {
}
public static OfferFragment newInstance() {
OfferFragment fragment = new OfferFragment();
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_offer, container, false);
rvOffers = rootView.findViewById(R.id.rvOffers);
setData();
return rootView;
}
private void setData() {
offers = realm.where(Offer.class).findAll();
offersAdapter = new OfferAdapter(getContext(),offers);
offers.addChangeListener(offersList -> {
offersAdapter.setOffers(offersList);
});
rvOffers.setLayoutManager(new LinearLayoutManager(getContext(), RecyclerView.VERTICAL, false));
rvOffers.setAdapter(offersAdapter);
}
}
这是我的 trailer_offer_item.xml 文件
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="140dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="135dp"
android:layout_marginStart="5dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="5dp"
android:id="@+id/clParent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<ImageView
android:id="@+id/imgOffer"
style="@style/ImageViewStyle"
android:layout_width="match_parent"
android:layout_height="135dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
</ImageView>
<ImageView
android:id="@+id/imgGradient"
android:layout_width="match_parent"
android:layout_height="90dp"
android:background="@drawable/image_view_gradient"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
</ImageView>
<TextView
android:id="@+id/tvOfferSubtitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="@dimen/margin_lsmall"
android:layout_marginEnd="@dimen/margin_lsmall"
android:layout_marginBottom="@dimen/margin_xxlsmall"
android:fontFamily="@font/aktiv_regular"
android:text="Dolor sit amet 20%"
android:textColor="@color/white"
android:textSize="@dimen/textsize_lmedium"
app:layout_constraintBottom_toBottomOf="parent"
android:maxLines="1"
android:ellipsize="end">
</TextView>
<TextView
android:id="@+id/tvOfferTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="@dimen/margin_lsmall"
android:layout_marginEnd="@dimen/margin_lsmall"
android:layout_marginBottom="@dimen/margin_xxlsmall"
android:fontFamily="@font/aktiv_bold"
android:text="Lorem ipsum"
android:textColor="@color/white"
android:textSize="@dimen/textsize_medium"
app:layout_constraintBottom_toTopOf="@id/tvOfferSubtitle">
</TextView>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
最佳答案
改变
View view = LayoutInflater.from(mContext).inflate(R.layout.layout_sort_search,null);
到
View view = LayoutInflater.from(mContext).inflate(R.layout.layout_sort_search,parent, false);
其他 View 也类似。它应该工作。
关于android - RecyclerView 项目在 RecyclerView 中变得不可见，滚动时有多种项目类型，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59413474/