Question

这里是我在RecyclerView中的项目的XML

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/cvItems"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:layout_margin="2dp"
    card_view:cardElevation="0dp"
    card_view:contentPadding="0dp"
    card_view:cardBackgroundColor="#FFFFFF"
    >

    <LinearLayout
        android:orientation="horizontal"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent">
        <TextView
            android:layout_width="0dip"
            android:layout_height="match_parent"
            android:layout_weight="0.8"
            android:id="@+id/tvContent"
            android:textSize="15dp"
            android:paddingLeft="5dp"
            android:paddingRight="5dp" />
        <CheckBox
            android:id="@+id/cbSelect"
            android:layout_width="0dip"
            android:layout_weight="0.2"
            android:layout_height="match_parent"
            android:button="@drawable/cb_checked"
            android:gravity="center_horizontal"
            android:textAlignment="center"
            android:layout_gravity="center_horizontal" />
    </LinearLayout>
</android.support.v7.widget.CardView>

这里是RecyclerView适配器，它为每个项目增加了上面的布局：

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

    private ArrayList<ObjectIncome> myItems = new ArrayList<>();

    public AdapterTrashIncome(ArrayList<ObjectIncome> getItems, Context context){
        try {
            mContext = context;
            myItems = getItems;
        }catch (Exception e){
            Log.e(FILE_NAME, "51: " + e.toString());
            e.printStackTrace();
        }
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        public TextView tvContent;
        public CheckBox cbSelect;

        public ViewHolder(View v) {
            super(v);
            tvContent = (TextView) v.findViewById(R.id.tvContent);
            cbSelect = (CheckBox) v.findViewById(R.id.cbSelect);
        }
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        final ObjectIncome objIncome = myItems.get(position);
        String content = "<b>lalalla</b>";
        holder.tvContent.setText(Html.fromHtml(content));
    }
}

问题是，让我说我在RecyclerView中有10个项目。当我选中项目1,2,3上的复选框时，我向下滚动RecyclerView，突然检查其他一些项目，例如项目8,9。当我再次向上滚动时，检查项目1和3但不检查项目2.知道为什么会发生这种情况吗？

Answer 1

这很正常。您没有选中是否选中了复选框。您正在选择一个，而View holder会保持选中状态。您可以在ObjectIncome对象中添加一个布尔变量，并保持项目的选择状态。

你可以看看我的例子。你可以这样做：

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

    private ArrayList<ObjectIncome> myItems = new ArrayList<>();

    public AdapterTrashIncome(ArrayList<ObjectIncome> getItems, Context context){
        try {
            mContext = context;
            myItems = getItems;
            }catch (Exception e){
            Log.e(FILE_NAME, "51: " + e.toString());
            e.printStackTrace();
        }
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        public TextView tvContent;
        public CheckBox cbSelect;

        public ViewHolder(View v) {
            super(v);
            tvContent = (TextView) v.findViewById(R.id.tvContent);
            cbSelect = (CheckBox) v.findViewById(R.id.cbSelect);
        }
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        final ObjectIncome objIncome = myItems.get(position);
        String content = "<b>lalalla</b>";
        holder.tvContent.setText(Html.fromHtml(content));

        //in some cases, it will prevent unwanted situations
        holder.cbSelect.setOnCheckedChangeListener(null);

        //if true, your checkbox will be selected, else unselected
        holder.cbSelect.setChecked(objIncome.isSelected());

        holder.cbSelect.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    //set your object's last status
                    objIncome.setSelected(isChecked);
            }
        });

    }
}

Answer 2

如果您在回收器视图中拥有有限的物品数量，请使用此选项。
我尝试在模型中使用布尔值并保持复选框状态，但在我的情况下它没有帮助。对我有用的是 this.setIsRecyclable（false）;

public class ComponentViewHolder extends RecyclerView.ViewHolder {
    public MyViewHolder(View itemView) {
        super(itemView);
        ....
        this.setIsRecyclable(false);
    }

有关此问题的更多说明，请访问https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ViewHolder.html#isRecyclable()

注意：这是一种解决方法。要正确使用它，您可以参考文档，其中指出“对setIsRecyclable（）的调用应始终配对（对setIsRecyclabe（false）的一次调用应始终与稍后调用setIsRecyclable（true）匹配）。可能是嵌套的，因为状态是内部引用计数的。“我不知道如何在代码中执行此操作，如果有人可以提供更多代码。

Answer 3

简而言之，它是因为回收了视图并再次使用它们！

你怎么能避免这种情况：

1.在onBindViewHolder中检查是否应选中或取消选中复选框。不要忘记将if和else放在一起

if (...)
    holder.cbSelect.setChecked(true);
else
    holder.cbSelect.setChecked(false);

放置一个监听器复选框！每当检查过的雕像发生变化时，也会在myItems数组中更新相应的对象！因此，无论何时显示新视图，它都会读取最新的物体雕像。

Answer 4

您可以使用Model类来跟踪每个recyclerView项目的复选框。完整参考来自： RecyclerView Checkbox Android

setTag 和 getTag 用于跟踪复选框状态。查看完整参考链接以获取更多信息。它还教授如何将选中的项目发送到 NEXTACTIVITY 。

制作模型

public class Model {

    private boolean isSelected;
    private String animal;

    public String getAnimal() {
        return animal;
    }

    public void setAnimal(String animal) {
        this.animal = animal;
    }

    public boolean getSelected() {
        return isSelected;
    }

    public void setSelected(boolean selected) {
        isSelected = selected;
    }
}

创建integer.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <integer name="btnplusview">1</integer>
    <integer name="btnpluspos">2</integer>
</resources>

最后，适配器看起来像这样：

 import android.content.Context;
 import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
    import android.view.View;
 import android.view.ViewGroup;
 import android.widget.CheckBox;
 import android.widget.TextView;
 import android.widget.Toast;

 import java.util.ArrayList;


  public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder> {

private LayoutInflater inflater;
public static ArrayList<Model> imageModelArrayList;
private Context ctx;

public CustomAdapter(Context ctx, ArrayList<Model> imageModelArrayList) {

    inflater = LayoutInflater.from(ctx);
    this.imageModelArrayList = imageModelArrayList;
    this.ctx = ctx;
}

@Override
public CustomAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View view = inflater.inflate(R.layout.rv_item, parent, false);
    MyViewHolder holder = new MyViewHolder(view);

    return holder;
}

@Override
public void onBindViewHolder(final CustomAdapter.MyViewHolder holder, int position) {

    holder.checkBox.setText("Checkbox " + position);
    holder.checkBox.setChecked(imageModelArrayList.get(position).getSelected());
    holder.tvAnimal.setText(imageModelArrayList.get(position).getAnimal());

   // holder.checkBox.setTag(R.integer.btnplusview, convertView);
    holder.checkBox.setTag(position);
    holder.checkBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            Integer pos = (Integer) holder.checkBox.getTag();
            Toast.makeText(ctx, imageModelArrayList.get(pos).getAnimal() + " clicked!", Toast.LENGTH_SHORT).show();

            if (imageModelArrayList.get(pos).getSelected()) {
                imageModelArrayList.get(pos).setSelected(false);
            } else {
                imageModelArrayList.get(pos).setSelected(true);
            }
        }
    });


}

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

class MyViewHolder extends RecyclerView.ViewHolder {

    protected CheckBox checkBox;
    private TextView tvAnimal;

    public MyViewHolder(View itemView) {
        super(itemView);

        checkBox = (CheckBox) itemView.findViewById(R.id.cb);
        tvAnimal = (TextView) itemView.findViewById(R.id.animal);
    }

}

}

Answer 5

只需添加recyclelerview的两个覆盖方法

@Override
public long getItemId(int position) {
return position;
}

@Override
public int getItemViewType(int position) {
return position;
}

Answer 6

如上所述，对象的检查状态应包含在对象属性中。在某些情况下，您可能还需要通过单击对象本身来更改对象选择状态，并让CheckBox通知其实际状态（选中或未选中）。然后，该复选框将在给定适配器的实际位置（默认情况下（在大多数情况下）为列表中元素的位置）上使用对象的状态。

检查下面的代码段，可能会有用。

import android.content.Context;
import android.graphics.Bitmap;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;

import java.io.File;
import java.io.IOException;
import java.util.List;

public class TakePicImageAdapter extends RecyclerView.Adapter<TakePicImageAdapter.ViewHolder>{
    private Context context;
    private List<Image> imageList;

    public TakePicImageAdapter(Context context, List<Image> imageList) {
        this.context = context;
        this.imageList = imageList;
    }

    @Override
    public TakePicImageAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(context).inflate(R.layout.image_item,parent,false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(final TakePicImageAdapter.ViewHolder holder, final int position) {
        File file=new File(imageList.get(position).getPath());
        try {
            Bitmap bitmap= MediaStore.Images.Media.getBitmap(context.getContentResolver(), Uri.fromFile(file));
            holder.image.setImageBitmap(bitmap
            );
        } catch (IOException e) {
            e.printStackTrace();
        }
        holder.selectImage.setOnCheckedChangeListener(null);
        holder.selectImage.setChecked(imageList.get(position).isSelected());
        holder.selectImage.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                holder.selectImage.setChecked(isChecked);
                imageList.get(position).setSelected(isChecked);
            }
        });
        holder.image.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (imageList.get(position).isSelected())
                {
                    imageList.get(position).setSelected(false);
                    holder.selectImage.setChecked(false);
                }else
                {
                    imageList.get(position).setSelected(true);
                    holder.selectImage.setChecked(true);
                }
            }
        });

    }

    @Override
    public int getItemCount() {
        return imageList.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        public ImageView image;public CheckBox selectImage;
        public ViewHolder(View itemView) {
            super(itemView);
            image=(ImageView)itemView.findViewById(R.id.image);
            selectImage=(CheckBox) itemView.findViewById(R.id.ch);

        }
    }
}

Answer 7

您需要将onBindViewHolder（逻辑）交互与CheckBox分开，并将用户交互与复选框分开。我使用OnCheckedChangeListener进行用户交互（很明显）和ViewHolder.bind（）用于逻辑，这就是为什么你需要在设置holder之前将checked侦听器设置为null并且在holder准备就绪之后 - 为用户交互配置已检查的监听器。

boolean[] checkedStatus = new boolean[numberOfRows];

@Override
        public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {
        final ViewHolderItem itemHolder = (ViewHolderItem) holder;

        //holder.bind should not trigger onCheckedChanged, it should just update UI
        itemHolder.checkBox.setOnCheckedChangeListener(null);

        itemHolder.bind(position);

        itemHolder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked) {
                    checkedStatus[holder.getAdapterPosition()] = true;
                    performCheckedActions(); //your logic here
                } else {
                    checkedStatus[holder.getAdapterPosition()] = false;
                    performUncheckedActions(); //your logic here
                }
            }
        });
    }

public void bind(int position) {
            boolean checked = checkedStatus[position];
            if (checked) {
                checkBox.setChecked(false);
            } else {
                checkBox.setChecked(true);
            }
        }

Answer 8

我发现这个解决方案的问题是，通过创建静态全局数组并在“onBindViewHolder”中使用它 ADAPER CLASS，我在其中创建了所需的所有全局变量/对象。

public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder> {
private Context context;
public static class PersonViewHolder extends RecyclerView.ViewHolder {

    CardView cv;
    TextView question,category;
    TextView personAge;
    ImageView upvote;
    Button b1;
    public static int k;
    private int visibleThreshold = 5;
    public static int i=0;
     static int  check[]; //Static array
    PersonViewHolder(View itemView,int i) {
        super(itemView);
        if(i==PersonViewHolder.k)
        {
            b1=(Button)itemView.findViewById(R.id.loadmore);

        }
        else
        {
            cv = (CardView)itemView.findViewById(R.id.cv);
            question = (TextView)itemView.findViewById(R.id.question);
            category = (TextView)itemView.findViewById(R.id.text_categ);
            personAge = (TextView)itemView.findViewById(R.id.text1);
            upvote = (ImageView)itemView.findViewById(R.id.upvote);

        }

    }

}

这里（RVADAPTER CLASS的IN CONSTRUCTOR）我给数组的大小等于我将要在回收者视图中显示的项目的大小/没有

List<Person> persons;

RVAdapter(List<Person> persons){
    this.persons = persons;
    PersonViewHolder.check=new int[persons.size()];
    PersonViewHolder.k=persons.size();
}

BindViewHolder，我，在按钮上应用了这个概念，当我点击按钮时，按钮的背景图像会发生变化。我使用的按钮的对象是名称为“upvote”，因为“i”保存了Recycler视图中每个项目的位置，我将其用作数组的索引，该数组作为标志工作并且跟踪元素的状态。

@Override
public void onBindViewHolder(final PersonViewHolder personViewHolder, final int i) {
    if(i==PersonViewHolder.k) {
        personViewHolder.b1.setText("load more");

    }
    else
     {
        personViewHolder.question.setText(persons.get(i).name);
        personViewHolder.personAge.setText(persons.get(i).age);

         if(personViewHolder.check[i]==0)
         {personViewHolder.upvote.setBackgroundResource(R.drawable.noupvote);
         }
         else
         {
             personViewHolder.upvote.setBackgroundResource(R.drawable.upvote);

         }

         personViewHolder.upvote.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 if(personViewHolder.check[i]==0)
                 {personViewHolder.check[i]=1;
                     personViewHolder.upvote.setBackgroundResource(R.drawable.upvote);


                 }
                 else
                 {personViewHolder.check[i]=0;
                     personViewHolder.upvote.setBackgroundResource(R.drawable.noupvote);

                 }


             }
         });
        // personViewHolder.personPhoto.setImageResource(persons.get(i).photoId);
    }

}

Answer 9

使用Kotlin对我来说唯一解决此问题的方法是在设置变量之前清除OnCheckedChangeListener，然后在设置OnCheckedChangeListener之后创建新的checked。

我在RecyclerView.ViewHolder

中执行以下操作

task.setOnCheckedChangeListener(null)
task.isChecked = item.status
task.setOnCheckedChangeListener { _: CompoundButton, checked: Boolean ->
    item.status = checked
    ...
    do more stuff
    ...
}

Answer 10

在我看来，这行得通。

@Override
public void onViewRecycled(MyViewHolder holder) {
    holder.checkbox.setChecked(false); // - this line do the trick
    super.onViewRecycled(holder);
}

Answer 11

这是一个对我有用的 Kotlin 解决方案

this.cart

Answer 12

解决方案是选中复选框。需要存储这个单独的列表。并使用该列表填充回收站视图中的复选框。

你可以参考这个链接。

https://blog.oziomaogbe.com/2017/10/18/android-handling-checkbox-state-in-recycler-views.html

Answer 13

完整示例
公共类ChildAddressAdapter扩展了RecyclerView.Adapter {

private Activity context;
private List<AddressDetail> addressDetailList;
private int selectedPosition = -1;

public ChildAddressAdapter(Activity context, List<AddressDetail> addressDetailList) {
    this.context = context;
    this.addressDetailList = addressDetailList;
}

@NonNull
@Override
public CartViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    LayoutInflater inflater = LayoutInflater.from(context);
    View myView = inflater.inflate(R.layout.address_layout, parent, false);
    return new CartViewHolder(myView);
}

@Override
public void onBindViewHolder(@NonNull CartViewHolder holder, int position) {

    holder.adress_checkbox.setOnClickListener(view -> {
        selectedPosition = holder.getAdapterPosition();
        notifyDataSetChanged();
    });

    if (selectedPosition==position){
        holder.adress_checkbox.setChecked(true);
    }
    else {
        holder.adress_checkbox.setChecked(false);
    }


}

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

class CartViewHolder extends RecyclerView.ViewHolder
{
    TextView address_text,address_tag;
    CheckBox adress_checkbox;

    CartViewHolder(View itemView) {
        super(itemView);
        address_text = itemView.findViewById(R.id.address_text);
        address_tag = itemView.findViewById(R.id.address_tag);
        adress_checkbox = itemView.findViewById(R.id.adress_checkbox);
    }
}

}

Answer 14

这是由于一次又一次地创建视图，最好的选择是在设置适配器之前清除缓存

recyclerview.setItemViewCacheSize(your array.size());

Answer 15

将 setItemViewCacheSize（int size）添加到recyclerview并通过列表的大小解决了我的问题。

mycode：

mrecyclerview.setItemViewCacheSize(mOrderList.size());
mBinding.mrecyclerview.setAdapter(mAdapter);

来源： https://stackoverflow.com/a/46951440/10459907

Answer 16

使用数组保存项目的状态

在适配器中，使用Map或SparseBooleanArray（与map类似，但它是int和boolean的键值对）将所有项目的状态存储在项目列表中，然后在切换检查状态时使用键和值进行比较

在适配器中创建一个SparseBooleanArray

// sparse boolean array for checking the state of the items

    private SparseBooleanArray itemStateArray= new SparseBooleanArray();

然后在项目点击处理程序onClick()中使用itemStateArray中的项目状态在切换之前进行检查，这是一个示例

        @Override
        public void onClick(View v) {
            int adapterPosition = getAdapterPosition();
            if (!itemStateArray.get(adapterPosition, false)) {
                mCheckedTextView.setChecked(true);
                itemStateArray.put(adapterPosition, true);
            }
            else  {
                mCheckedTextView.setChecked(false);
                itemStateArray.put(adapterPosition, false);
            }
        }

另外，使用稀疏布尔数组设置绑定视图时的检查状态

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    holder.bind(position);
}

@Override
public int getItemCount() {
    if (items == null) {
        return 0;
    }
    return items.size();
}

 void loadItems(List<Model> tournaments) {
    this.items = tournaments;
    notifyDataSetChanged();
}


class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    CheckedTextView mCheckedTextView;

    ViewHolder(View itemView) {
        super(itemView);
        mCheckedTextView = (CheckedTextView) itemView.findViewById(R.id.checked_text_view);
        itemView.setOnClickListener(this);
    }

    void bind(int position) {
        // use the sparse boolean array to check
        if (!itemStateArray.get(position, false)) {
            mCheckedTextView.setChecked(false);}
        else {
            mCheckedTextView.setChecked(true);
        }
    }

最终的适配器将类似于this

Answer 17

在使用> dat_puremath age traveltime 918 15 931 16 933 16 935 16 927 16 929 17 942 17 928 16 936 17 939 17 941 17 937 17 925 16 938 17 921 15 943 17 NA NA NA.1 NA NA.2 NA NA.3 NA NA.4 NA NA.5 NA NA.6 NA NA.7 NA NA.8 NA NA.9 NA NA.10 NA NA.11 NA NA.12 NA NA.13 NA NA.14 NA NA.15 NA NA.16 NA NA.17 NA NA.18 NA NA.19 NA NA.20 NA NA.21 NA NA.22 NA NA.23 NA NA.24 NA NA.25 NA NA.26 NA NA.27 NA NA.28 NA NA.29 NA NA.30 NA NA.31 NA 而不是setOnCheckedChangeListener时会发生这种情况，而在内部只需执行以下简单操作即可：

setObClickListener

注意：在列表模型中，添加一个名称为if (list.get(position).isCheck()) { list.get(position).setCheck(false); } else { list.get(position).setCheck(true); }的布尔变量，并为其设置getter和setter，在上述情况下，我的是setCheck和isCheck

希望有帮助的话+投票给这个答案

Answer 18

public class TagYourDiseaseAdapter扩展了RecyclerView.Adapter { private ReCyclerViewItemClickListener mRecyclerViewItemClickListener; private Context mContext;

List<Datum> deviceList = Collections.emptyList();

/**
 * Initialize the values
 *
 * @param context : context reference
 * @param devices : data
 */

public TagYourDiseaseAdapter(Context context, List<Datum> devices,
                             ReCyclerViewItemClickListener mreCyclerViewItemClickListener) {
    this.mContext = context;
    this.deviceList = devices;
    this.mRecyclerViewItemClickListener = mreCyclerViewItemClickListener;
}


/**
 * @param parent   : parent ViewPgroup
 * @param viewType : viewType
 * @return ViewHolder
 * <p>
 * Inflate the Views
 * Create the each views and Hold for Reuse
 */
@Override
public TagYourDiseaseAdapter.OrderHistoryViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_tag_disease, parent, false);
    TagYourDiseaseAdapter.OrderHistoryViewHolder myViewHolder = new TagYourDiseaseAdapter.OrderHistoryViewHolder(view);
    return myViewHolder;
}


/**
 * @param holder   :view Holder
 * @param position : position of each Row
 *                 set the values to the views
 */
@Override
public void onBindViewHolder(final TagYourDiseaseAdapter.OrderHistoryViewHolder holder, final int position) {
    Picasso.with(mContext).load(deviceList.get(position).getIconUrl()).into(holder.document);
    holder.name.setText(deviceList.get(position).getDiseaseName());

    holder.radioButton.setOnCheckedChangeListener(null);
    holder.radioButton.setChecked(deviceList.get(position).isChecked());

    //if true, your checkbox will be selected, else unselected
    //holder.radioButton.setChecked(objIncome.isSelected());

    holder.radioButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            deviceList.get(position).setChecked(isChecked);
        }
    });


}

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


/**
 * Create The view First Time and hold for reuse
 * View Holder for Create and Hold the view for ReUse the views instead of create again
 * Initialize the views
 */

public class OrderHistoryViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    ImageView document;
    TextView name;
    CheckBox radioButton;

    public OrderHistoryViewHolder(View itemView) {
        super(itemView);
        document = itemView.findViewById(R.id.img_tag);
        name = itemView.findViewById(R.id.text_tag_name);
        radioButton = itemView.findViewById(R.id.rdBtn_tag_disease);
        radioButton.setOnClickListener(this);
        //this.setIsRecyclable(false);
    }


    @Override
    public void onClick(View view) {
        mRecyclerViewItemClickListener.onItemClickListener(this.getAdapterPosition(), view);
    }
}

}

Answer 19

好的有很多答案这里我会发布我的代码，我会简单解释一下我做了什么......也许可以帮助像我这样的小辈：D。

1-目标：

我们将创建一个包含RecyclerView和CheckBox的{{1}}列表，如下所示：

2-模型类

RadioButton

3-My Amazing Adapter

public class ModelClass {
private String time;
private boolean checked;
private boolean free;
private boolean paid;

public TherapistScheduleModel(String time, boolean checked, boolean free, boolean paid) {
    this.time = time;
    this.checked = checked;
    this.free = free;
    this.paid = paid;
}

public boolean isFree() {
    return free;
}

public void setFree(boolean free) {
    this.free = free;
}

public boolean isPaid() {
    return paid;
}

public void setPaid(boolean paid) {
    this.paid = paid;
}

public String getTime() {
    return time;
}

public void setTime(String time) {
    this.time = time;
}

public boolean getChecked() {
    return checked;
}

public void setChecked(boolean checked) {
    this.checked= checked;
}
}

3-在活动中，您可以获得以下内容：

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private Context context;
private ListAllListeners listAllListeners;
private ArrayList<ModelClass> mDataList;

public MyAdapter(Context context, ArrayList<ModelClass> mDataList,
                             ListAllListeners listAllListeners) {
    this.mDataList = mDataList;
    this.listAllListeners = listAllListeners;
    this.context = context;
}

@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    View view = inflater.inflate(R.layout.single_view, parent, false);
    return new MyViewHolder(view);
}

@Override
public int getItemCount() {
    if (mDataList != null)
        return mDataList.size();
    else
        return 0;
}

@Override
public void onBindViewHolder(@NonNull final MyViewHolder holder, final int position) {
     //important to:
    //setOnCheckedChangeListener to 'null'
    holder.checkBoxTime.setOnCheckedChangeListener(null);
    holder.freeRB.setOnCheckedChangeListener(null);
    holder.paidRB.setOnCheckedChangeListener(null);

    //Check Box
            holder.checkBoxTime.setText(mDataList.get(holder.getAdapterPosition()).getTime());
    //here we check if the item is checked or not from the model.
    if(mDataList.get(holder.getAdapterPosition()).getChecked())
        holder.checkBoxTime.setChecked(true);
    else
        holder.checkBoxTime.setChecked(false);

    holder.checkBoxTime.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (b) {
                mDataList.get(holder.getAdapterPosition()).setChecked(true);
                listAllListeners.onItemCheck(holder.checkBoxTime.getText().toString(), holder.getAdapterPosition());
            }
            else {
                mDataList.get(holder.getAdapterPosition()).setChecked(false);
                listAllListeners.onItemUncheck(holder.checkBoxTime.getText().toString(), holder.getAdapterPosition());
            }
        }
    });

    //Radio Buttons

    if(mDataList.get(holder.getAdapterPosition()).isFree())
        holder.freeRB.setChecked(true);
    else
        holder.freeRB.setChecked(false);
    holder.freeRB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (b) {
                mDataList.get(holder.getAdapterPosition()).setFree(true);
                listAllListeners.onFreeCheck(holder.freeRB.getText().toString(), holder.getAdapterPosition());
            } else {
                mDataList.get(holder.getAdapterPosition()).setFree(false);
                listAllListeners.onFreeUncheck(holder.freeRB.getText().toString(), holder.getAdapterPosition());
            }
        }
    });

   //***and so on to paidRB***

}//end onBindViewHolder()

public interface ListAllListeners {
//here is a list of clicked listeners to use them as you want ;).
//you can get a list of checked or unChecked of all 
        void onItemCheck(String checkBoxName, int position);
        void onItemUncheck(String checkBoxName, int position);
        void onFreeCheck(String name, int pos);
        void onFreeUncheck(String name, int pos);
        void onPaidCheck(String name, int pos);
        void onPaidUncheck(String name, int pos);
    }

    class MyViewHolder extends RecyclerView.ViewHolder {

        CheckBox checkBoxTime;
        RadioButton freeRB, paidRB;

        MyViewHolder(View itemView) {
            super(itemView);
            checkBoxTime = itemView.findViewById(R.id.timeCheckBox);
            freeRB = itemView.findViewById(R.id.freeRadioBtn);
            paidRB = itemView.findViewById(R.id.paidRadioBtn);
        }
    }//end class MyViewHolder

    }//end class

Answer 20

我遇到了同样的问题。当我点击我的recyclerView中的项目切换按钮时，每10个项目中都会出现一个切换按钮（例如，如果点击了0索引的项目，那么9,18,27个索引的项目也会被点击）。首先，我在onBindViewHolder中的代码是：

if (newsItems.get(position).getBookmark() == 1) {
            holder.getToggleButtonBookmark().setChecked(true);
        }

但后来我添加了Else声明

if (newsItems.get(position).getBookmark() == 1) {
            holder.getToggleButtonBookmark().setChecked(true);
//else statement prevents auto toggling
        } else{
            holder.getToggleButtonBookmark().setChecked(false);
        }

问题解决了

Answer 21

我在带有开关的RecyclerView列表中遇到了同样的问题，并使用@oguzhand回答解决了问题，但是在checkedChangeListener中使用了这段代码：

if (buttonView.isPressed()) {
    if (isChecked) {
        group.setSelected(true);
    } else {
        group.setSelected(false);
    }
}else{
    if (isChecked) {
        buttonView.setChecked(false);
    } else {
        buttonView.setChecked(true);
    }
}

（其中＆＃39; group＆＃39;是我想要选择/取消选择的实体）

Answer 22

对我来说有用的是在视图将被回收（onViewRecycled）时取消viewHolder上的侦听器：

 override fun onViewRecycled(holder: AttendeeViewHolder) {
            super.onViewRecycled(holder)
            holder.itemView.hasArrived.setOnCheckedChangeListener(null);
            holder.itemView.edit.setOnClickListener { null }
        }

Answer 23

我建议不要在checkBox.setOnCheckedChangeListener中使用recyclerViewAdapter。因为在滚动recyclelerView时，适配器将触发checkBox.setOnCheckedChangeListener。 不安全。相反，使用checkBox.setOnClickListener与用户输入进行交互。

例如：

     public void onBindViewHolder(final ViewHolder holder, int position) {
        /*
         .
         .
         .
         .
         .
         .
        */

        holder.checkBoxAdapterTasks.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                boolean isChecked =  holder.checkBoxAdapterTasks.isChecked();
                if(isChecked){
                    //checkBox clicked and checked
                }else{
                    //checkBox clicked and unchecked
                }

            }
        });

    }

RecyclerView中的CheckBox继续检查不同的项目

23 个答案: