回收器查看点击项未响应单击

Question

我想在我的应用程序中为RecyclerViewItem实现一个onClickListener。我的问题是，没有调用onclick侦听器。甚至在适配器中也没有。我现在正在尝试让它工作 5 个小时，我真的很沮丧，不知道如何解决这个问题/继续。 我希望你能帮助我。

项目列表适配器.class

public class ItemListAdapter extends RecyclerView.Adapter<ItemListAdapter.ItemViewHolder> implements Filterable {
private ArrayList<Item> mItemList;
private ArrayList<Item> mItemListFiltered;
private ItemsListAdapterListener mItemsListAdapterListener;

public ItemListAdapter(ArrayList<Item> itemArrayList, ItemsListAdapterListener itemsListAdapterListener) {
mItemList = itemArrayList;
mItemListFiltered = itemArrayList;
this.mItemsListAdapterListener = itemsListAdapterListener;
}

public interface ItemsListAdapterListener {
void onItemClick(int position);
}
public static class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public ImageView mImageView;
public TextView mTextView;
ItemsListAdapterListener mItemsListAdapterListener;
public ItemViewHolder(@NonNull View itemView, ItemsListAdapterListener itemsListAdapterListener) {
super(itemView);
mItemsListAdapterListener = itemsListAdapterListener;
mImageView = itemView.findViewById(R.id.imageViewItem);
mTextView = itemView.findViewById(R.id.textViewItem);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
mItemsListAdapterListener.onItemClick(getAdapterPosition());
Log.i("test", "Adapter click");
}
}

@NonNull
@Override
public ItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_view_layout, parent, false);
ItemViewHolder itemViewHolder = new ItemViewHolder(view, mItemsListAdapterListener);
return  itemViewHolder;
}
@Override
public void onBindViewHolder(@NonNull ItemViewHolder holder, int position) {
Item item = mItemListFiltered.get(position);
holder.mImageView.setImageResource(item.getImgURL());
holder.mTextView.setText(item.getItemName());
}
@Override
public int getItemCount() {
return mItemListFiltered.size();
}
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString();
if (charString.isEmpty()) {
mItemListFiltered = mItemList;
} else {
ArrayList<Item> filteredList = new ArrayList<>();
for (Item row: mItemList) {
// name match condition. this might differ depending on your requirement
// here we are looking for name or phone number match
if (row.getItemName().toLowerCase().contains(charString.toLowerCase()) || row.getItemCategory().toLowerCase().contains(charString.toLowerCase())) {
filteredList.add(row);
}
}
mItemListFiltered = (ArrayList<Item>) filteredList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = mItemListFiltered;
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
mItemListFiltered = (ArrayList<Item>) filterResults.values;
notifyDataSetChanged();
}
};
}
}

项目片段.class

public class ItemsFragment extends Fragment implements TextWatcher, ItemListAdapter.ItemsListAdapterListener{
private ItemsViewModel itemsViewModel;
private RecyclerView mRecyclerView;
private ItemListAdapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
public View onCreateView(@NonNull final LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
itemsViewModel =
ViewModelProviders.of(this).get(ItemsViewModel.class);
View root = inflater.inflate(R.layout.fragment_items, container, false);

final EditText editTextItemSearch;
editTextItemSearch = (EditText) root.findViewById(R.id.editTextItemSearch);
editTextItemSearch.addTextChangedListener(this);

final ArrayList<Item> itemArrayList = new ArrayList<>();
itemArrayList.add(new Item("TestItem1", R.drawable.unbenannt, getString(R.string.item_parts)));
itemArrayList.add(new Item("TestItem2", R.drawable.ic_home_black_24dp, getString(R.string.item_tools)));
itemArrayList.add(new Item("TestItem3", R.drawable.ic_dashboard_black_24dp, getString(R.string.item_consumable)));
itemArrayList.add(new Item("test123", R.drawable.ic_notifications_black_24dp, getString(R.string.item_interactive)));
itemArrayList.add(new Item("test12567687863", R.drawable.ic_notifications_black_24dp,getString(R.string.item_blocks)));
Log.i("test", "items added");
mRecyclerView = root.findViewById(R.id.recylcerViewItems);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(getContext());
mAdapter = new ItemListAdapter(itemArrayList, this);
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mAdapter);
return root;
}

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
mAdapter.getFilter().filter(s);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
@Override
public void onItemClick(int position) {
Log.i("test", "item clicked");
}

}

adapter_view_layout.xml

<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="6dp">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_margin="8dp"
android:backgroundTint="@color/colorBackroundBright"
android:clickable="true"
android:foreground="?attr/selectableItemBackground"
app:cardCornerRadius="15dp"
tools:layout_editor_absoluteX="144dp"
tools:layout_editor_absoluteY="42dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageViewItem"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="16dp"
android:layout_marginStart="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textViewItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:fontFamily="@font/nunito_regular"
android:text="ItemName"
android:textColor="#959595"
app:layout_constraintBottom_toBottomOf="@+id/imageViewItem"
app:layout_constraintStart_toEndOf="@+id/imageViewItem"
app:layout_constraintTop_toTopOf="@+id/imageViewItem" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>

Answer 1

尝试从 CardView 中删除android:clickable="true"。

我认为正在发生的事情是你正在点击 CardView，它正在窃取点击，所以根视图没有得到它。

Answer 2

试试这个：

在ItemViewHolder中添加一个View对象并将其设置为itemView：

public static class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public ImageView mImageView;
public TextView mTextView;
//add here
public View view;
ItemsListAdapterListener mItemsListAdapterListener;
public ItemViewHolder(@NonNull View itemView, ItemsListAdapterListener itemsListAdapterListener) {
super(itemView);
//set here
view = itemView;
.........
.........

现在在onBindViewHolder中设置 onClickListener ：

@Override
public void onBindViewHolder(@NonNull ItemViewHolder holder, int position) {
Item item = mItemListFiltered.get(position);
holder.mImageView.setImageResource(item.getImgURL());
holder.mTextView.setText(item.getItemName());
//here
holder.view.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
mItemsListAdapterListener.onItemClick(position);
}
});
}

更新：

从 cardView xml 中删除此内容：

android:clickable="true"