Question

目标：使用每行的更改图像视图跟踪回收者视图的选定项目。实际上，我实现了一种复选框。

检查工作正常：

但是当我尝试搜索某些项目时，选中的项目会发生变化：只检查我列表中的第一项：

我将在下面发布我的代码：

选择商店界面

public interface NearestShopActivityAdapterListener {
    void onShopSelected(FShop shop, View view);
}

我的观看持有人

public class MyHolder extends RecyclerView.ViewHolder{
    public TextView name, address;
    public ImageView logo;

    public MyHolder(View itemView) {
        super(itemView);
        name = (TextView) itemView.findViewById(R.id.activityNearestShopListItemUhop);
        address = (TextView) itemView.findViewById(R.id.activityNearestShopListItemAddress);
        logo = (ImageView) itemView.findViewById(R.id.activityNearestShopListItemImage);

        itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onShopSelected(filteredShopList.get(getAdapterPosition()),view);
            }
        });
    }

onShopSelected功能

 @Override
public void onShopSelected(FShop shop, View view) {
    if(checkList.contains(shop.getShopId())){
        mImgViewCheckBox = (ImageView) view.findViewById(R.id.checkBoxNearestShop);
        mImgViewCheckBox.setImageResource(R.drawable.checkbox_selector_not_checked);
        checkList.remove(shop.getShopId());
    }else {
        mImgViewCheckBox = (ImageView) view.findViewById(R.id.checkBoxNearestShop);
        mImgViewCheckBox.setImageResource(R.drawable.ic_checked);
        checkList.add(shop.getShopId());
    }
}

我哪里错了？我会尝试将ImageView mImgViewCheckBox与Shop ID相关联，而不是将其与recyclelerview中的位置相关联，但我不知道如何操作。提前告诉你。

Answer 1

我已经在联系方式中做了这些事情。我提供了我的适配器和方法，您可以根据需要更改代码。

InviteContactAdapter.java

public class InviteContactAdapter extends RecyclerView.Adapter<InviteContactAdapter.ItemViewHolder> implements Filterable {
private List<UserContact> mContactList = new ArrayList<>();
private List<UserContact> mContectFilter = new ArrayList<>();
private Context mContext;
private CustomFilter mFilter;
public List<String> mEmailList = new ArrayList<>();

public InviteContactAdapter(Context context, List<UserContact> mContactList) {
    mContext = context;
    this.mContactList = mContactList;
    this.mContectFilter = mContactList;
    mFilter = new CustomFilter();
}

public onItemClickListener onItemClickListener;

public void setOnItemClickListener(InviteContactAdapter.onItemClickListener onItemClickListener) {
    this.onItemClickListener = onItemClickListener;
}

@Override
public ItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.invite_contact_row_layout, viewGroup, false);
    return new ItemViewHolder(view);
}

public interface onItemClickListener {
    void onClick(UserContact contact);
}

@Override
public Filter getFilter() {
    return mFilter;
}

@Override
public void onBindViewHolder(final ItemViewHolder itemViewHolder, int i) {
    final UserContact contact = mContectFilter.get(i);
    itemViewHolder.mTvUserNane.setText(contact.getUserName().trim());
    itemViewHolder.mTvUserEmail.setText(contact.getUserEmail().trim());
    if (contact.isSelect())
        itemViewHolder.mIvSelect.setImageResource(R.drawable.check_contect);
    else
        itemViewHolder.mIvSelect.setImageResource(R.drawable.un_check_contact);


    itemViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            if (contact.isSelect()) {
                contact.setSelect(false);
                itemViewHolder.mIvSelect.setImageResource(R.drawable.un_check_contact);
            } else {
                contact.setSelect(true);
                itemViewHolder.mIvSelect.setImageResource(R.drawable.check_contect);
            }
        }
    });

}

@Override
public int getItemCount() {
    return mContectFilter.size();
}

public class ItemViewHolder extends RecyclerView.ViewHolder {
    private TextView mTvUserNane, mTvUserEmail;
    private ImageView mIvSelect;

    public ItemViewHolder(View itemView) {
        super(itemView);
        mTvUserEmail = itemView.findViewById(R.id.icrlTvUserEmail);
        mTvUserNane = itemView.findViewById(R.id.icrlTvUserName);
        mIvSelect = itemView.findViewById(R.id.icrlIvSelect);
    }
}

public List<String> getEmail() {
    mEmailList.clear();
    for (UserContact contact : mContectFilter) {
        if (contact.isSelect()) {
            mEmailList.add(contact.getUserEmail());
        }
    }
    return mEmailList;
}

/**
 * this class for filter data.
 */
class CustomFilter extends Filter {

    @Override
    protected FilterResults performFiltering(CharSequence charSequence) {
        FilterResults results = new FilterResults();
        if (charSequence != null && charSequence.length() > 0) {
            ArrayList<UserContact> filters = new ArrayList<>();
            charSequence = charSequence.toString().toUpperCase();
            for (int i = 0; i < mContactList.size(); i++) {
                if (mContactList.get(i).getUserName().toUpperCase().contains(charSequence) || mContactList.get(i).getUserEmail().toUpperCase().contains(charSequence)) {
                    UserContact contact = new UserContact();
                    contact.setUserName(mContactList.get(i).getUserName());
                    contact.setUserEmail(mContactList.get(i).getUserEmail());
                    filters.add(contact);

                }
            }
            results.count = filters.size();
            results.values = filters;

        } else {
            results.count = mContactList.size();
            results.values = mContactList;
        }
        return results;
    }

    @Override
    protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
        mContectFilter = (ArrayList<UserContact>) filterResults.values;
        notifyDataSetChanged();
    }
}

}

然后将联系人数据绑定到回收站视图并根据名称和电子邮件搜索数据。 make set adapter方法..

  private void setAdapter(){
    if (!mContactList.isEmpty()) {
        inviteContactAdapter = new InviteContactAdapter(getActivity(), mContactList);
        mRvData.setAdapter(inviteContactAdapter);
        inviteContactAdapter.setOnItemClickListener(new InviteContactAdapter.onItemClickListener() {
            @Override
            public void onClick(UserContact contact) {
                mEmailList.add(contact.getUserEmail());
            }
        });
    } else {
        mTvEmpty.setVisibility(View.VISIBLE);
    }
}

然后制作搜索数据方法...

   /**
 * this method sort data.
 */
private void sortData(View root) {
    mEtSearchData = (EditText) root.findViewById(R.id.icffEtSearch);
    mEtSearchData.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            if (inviteContactAdapter != null) {
                inviteContactAdapter.getFilter().filter(s);
            }
        }

        @Override
        public void afterTextChanged(Editable s) {
        }
    });

}

获得联系数据后，它将起作用。并且你可以改变你的相应代码。

Answer 2

我还有一些可以说我每次需要回收站视图时使用的模板。

不同之处在于我在列表的每个项目中都使用了一个额外的属性，所以基本上你不依赖于过滤，排序或其他东西。

这是用于活动的XML：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="match_parent"
    tools:context="com.arnela.nihad.expresssaladbar.RecyclerViewExample.RecyclerViewActivity">

    <SearchView
        android:id="@+id/searchViewBox"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        android:layout_weight="1"
        android:iconifiedByDefault="false"
        android:queryHint="HINT"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginTop="8dp"
        android:clipToPadding="false"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/searchViewBox" />

</android.support.constraint.ConstraintLayout>

RecyclerViewActivity的Java类是下一个：

public class RecyclerViewActivity extends AppCompatActivity {

    private RecyclerView mRecyclerList;
    private RecyclerViewAdapter mRecyclerAdapter;
    private List<DataVm> mSourceList = new ArrayList<>();
    private SearchView txtSearchBox;
    private Data data;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recyler_view);


        data = new Data();
        mSourceList.addAll(data.getSourceList(""));

        // this is recycler view from xml
        mRecyclerList = findViewById(R.id.recycler_view);
        InitRecyclerView();

        txtSearchBox = findViewById(R.id.searchViewBox);

        txtSearchBox.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {

                mSourceList.clear();

                mSourceList.addAll(data.getSourceList(s));

                mRecyclerAdapter.notifyDataSetChanged();

                return false;
            }

            @Override
            public boolean onQueryTextChange(String s) {
                mSourceList.clear();

                mSourceList.addAll(data.getSourceList(s));

                mRecyclerAdapter.notifyDataSetChanged();

                return false;
            }
        });

    }

    public void InitRecyclerView() {

        mRecyclerList.setLayoutManager(new LinearLayoutManager(RecyclerViewActivity.this));
        mRecyclerAdapter = new RecyclerViewAdapter(mSourceList, new IClickListenerAddRemove() {

            @Override
            public void onPositionClicked(int position, boolean isPicked) {

                mSourceList.get(position).setPicked(isPicked);
            }

        });

        mRecyclerList.setAdapter(mRecyclerAdapter);
    }
}

然后，我有两个辅助类，一个用于创建模型数据，使用搜索方法：

public class Data {

    private List<DataVm> sourceList = null;

    public Data() {

        this.sourceList = new ArrayList<>();

        // Items of the list and set all items to isPicked to false
        sourceList.add(new DataVm(1, "Title 1", "Description 1", "", false));
        sourceList.add(new DataVm(2, "Title 2", "Description 2", "", false));
        sourceList.add(new DataVm(3, "Title 3", "Description 3", "", false));
        sourceList.add(new DataVm(4, "Title 4", "Description 4", "", false));
        sourceList.add(new DataVm(5, "Title 5", "Description 5", "", false));
        sourceList.add(new DataVm(6 , "Title 6 ", "Description 6 ", "", false));
        sourceList.add(new DataVm(7 , "Title 7 ", "Description 7 ", "", false));
        sourceList.add(new DataVm(8 , "Title 8 ", "Description 8 ", "", false));
        sourceList.add(new DataVm(9 , "Title 9 ", "Description 9 ", "", false));
        sourceList.add(new DataVm(10, "Title 10", "Description 10", "", false));
        sourceList.add(new DataVm(11, "Title 11", "Description 11", "", false));
        sourceList.add(new DataVm(12, "Title 12", "Description 12", "", false));
    }

    public List<DataVm> getSourceList(String searchTitle) {

        if (searchTitle.equals(""))
            return sourceList;

        List<DataVm> filteredList = new ArrayList<>();

        for (DataVm item : sourceList) {

            if (item.getTitle().contains(searchTitle)) {
                filteredList.add(item);
            }
        }

        return filteredList;
    }

    public void setSourceList(List<DataVm> sourceList) {
        this.sourceList = sourceList;
    }
}

第二个辅助类基本上是每行的类项：

public class DataVm {

    private int ItemId;
    private String Title;
    private String Description;
    private String Image;
    private boolean IsPicked;

    public DataVm (int itemId, String title, String description, String image, boolean isPicked) {
        ItemId = itemId;
        Title = title;
        Description = description;
        Image = image;
        IsPicked = isPicked;
    }

    public int getItemId() {
        return ItemId;
    }

    public void setItemId(int itemId) {
        ItemId = itemId;
    }

    public String getTitle() {
        return Title;
    }

    public void setTitle(String title) {
        Title = title;
    }

    public String getDescription() {
        return Description;
    }

    public void setDescription(String description) {
        Description = description;
    }

    public String getImage() {
        return Image;
    }

    public void setImage(String image) {
        Image = image;
    }

    public boolean isPicked() {
        return IsPicked;
    }

    public void setPicked(boolean picked) {
        IsPicked = picked;
    }
}

最后，最后两个类是Adapter for list，以及它的视图持有者。

适配器类：

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private List<DataVm> mItemList;
    private IClickListenerAddRemove listener;

    public RecyclerViewAdapter(List<DataVm> itemList, IClickListenerAddRemove listener) {

        mItemList = itemList;
        this.listener = listener;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        final View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.salad_creation_item_template, parent, false);
        return new RecyclerViewHolder(view, listener);
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {

        RecyclerViewHolder holder = (RecyclerViewHolder) viewHolder;
        DataVm item = mItemList.get(position);

        holder.setTitle(item.getTitle());
        holder.setDescription(item.getDescription());
        holder.setIsPicked(item.isPicked());

        if (item.isPicked())
            holder.setButtonDrawable(R.drawable.ic_remove_24dp);
        else
            holder.setButtonDrawable(R.drawable.ic_add_24dp);
    }

    @Override
    public int getItemCount() {
        return mItemList == null ? 0 : mItemList.size();
    }

}

最后一个是列表的查看持有者：

public class RecyclerViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    private TextView txtTitle;
    private TextView txtDescription;
    private ImageButton btnChecking;
    private WeakReference<IClickListenerAddRemove> listenerRef;
    private boolean mIsPicked = false;

    public RecyclerViewHolder(View root, IClickListenerAddRemove listener) {
        super(root);

        listenerRef = new WeakReference<>(listener);
        txtTitle = root.findViewById(R.id.txtTitle);
        txtDescription = root.findViewById(R.id.txtDescription);
        btnChecking = root.findViewById(R.id.btnAction);

        btnChecking.setOnClickListener(this);
    }

    public void setIsPicked(boolean mIsPicked) {
        this.mIsPicked = mIsPicked;
    }

    public void setTitle(CharSequence text) {
        txtTitle.setText(text);
    }

    public void setDescription(CharSequence text) {
        txtDescription.setText(text);
    }

    public void setButtonDrawable(int drawableId) {
        btnChecking.setImageResource(drawableId);
    }

    @Override
    public void onClick(View v) {

        if (v.getId() == btnChecking.getId()) {

            if (!mIsPicked) {
                btnChecking.setImageResource(R.drawable.ic_remove_24dp);
                mIsPicked = true;
            }
            else {
                btnChecking.setImageResource(R.drawable.ic_add_24dp);
                mIsPicked = false;
            }
            listenerRef.get().onPositionClicked(getAdapterPosition(), mIsPicked);
        }
    }
}

这样的结构如下：

可复制的Recyclerview与复选框

2 个答案: