如何在android中选择和取消选择recycleview

我已经创建了recycleview。该recycleview包含复选框。如果我单击recycleview中的第一个项目，复选框将被选中，然后我单击第二个项目意味着选中了第一个和第二个项目复选框。该复选框工作正常，但如果我单击第二个项目复选框，我想取消选中第一个选中项目。`

    public static class AddressAdapter1 extends RecyclerView.Adapter<AddressAdapter1.MyViewHolder>  {
    private int lastSelectedPosition = -1;
    private final Context mcontext;
    private AdapterView.OnItemClickListener onItemClickListener;
    private AdapterView.OnItemLongClickListener onItemLongClickListener;

    public  ArrayList<Child> movieItems;


    public static class MyViewHolder extends RecyclerView.ViewHolder   {
        public TextView address1,landmark1,building1,others_text;
        public ImageView home,work,others,edit;
        public  CheckBox checkbox;



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

            address1 = (TextView) view.findViewById(R.id.address);
            landmark1 = (TextView) view.findViewById(R.id.landmark);
            building1 = (TextView) view.findViewById(R.id.building);
            others_text = (TextView) view.findViewById(R.id.others_text);
            others = (ImageView) view.findViewById(R.id.others);
            home = (ImageView) view.findViewById(R.id.home);
            work = (ImageView) view.findViewById(R.id.work);
            edit = (ImageView) view.findViewById(R.id.edit);
            checkbox = (CheckBox) view.findViewById(R.id.checkbox);

        }

    }

    public AddressAdapter1(Context mcontext,ArrayList<Child> movieItems ) {

        this.mcontext = mcontext;
        this.movieItems = movieItems;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.profile_list, parent, false);


        return new MyViewHolder(itemView);
    }

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


        final Child m = movieItems.get(position);

            holder.edit.setVisibility(View.GONE);
        if (m.getaddress() != null) {
            if (!m.getaddress().equals("null")) {
                holder.address1.setText(m.getaddress());
            }

            if (m.getbuilding() != null) {
                if (!m.getbuilding().equals("null")) {
                    holder.building1.setText("Building/Flatno: "+m.getbuilding());
                }
                if (m.getlandmark() != null) {
                    if (!m.getlandmark().equals("null")) {
                        holder.landmark1.setText("Landmark: "+m.getlandmark());
                    }

                    if (m.getaddress_type() != null) {
                        if (!m.getaddress_type().equals("null")) {

                            String type=m.getaddress_type();
                            if(type.equals("1")){
                                holder. home.setVisibility(View.VISIBLE);
                                holder. others_text.setText("Home");
                            }
                            else if(type.equals("2")){
                                holder. work.setVisibility(View.VISIBLE);
                                holder. home.setVisibility(View.GONE);
                                holder. others_text.setText("Work");
                            }
                            else{
                                holder.others.setVisibility(View.VISIBLE);
                                holder. home.setVisibility(View.GONE);
                                holder. others_text.setText("Other");
                            }
                        }
                    }
                }
            }


            holder.checkbox.setChecked(m.isSelected());
            holder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    int getPosition = (Integer) buttonView.getTag();  // Here we get the position that we have set for the checkbox using setTag.
                    movieItems.get(getPosition).setSelected(buttonView.isChecked());
                    final Child m=new Child();
                    m.setSelected(isChecked);


                }
            });
            holder.checkbox.setTag(position);




        }


    }


    @Override
    public int getItemCount() {
        return movieItems.size();
    }
    @Override
    public int getItemViewType(int position) {

        return position;
    }
}

`试试这个：

private int lastSelectedPosition = -1; // adapter variable

holder.checkbox.setChecked(m.isSelected());
holder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

    @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            int getPosition = (Integer) buttonView.getTag();  // Here we get the position that we have set for the checkbox using setTag.
            movieItems.get(getPosition).setSelected(buttonView.isChecked());
            final Child m=new Child();

            if (getPosition != lastSelectedPosition) {
                m.setSelected(isChecked);
                if (lastSelectedPosition != -1) {  
                    movieItems.get(lastSelectedPosition ).setSelected(false) // unselect last selection
                    notifyItemChanged(lastSelectedPosition); // notify adapter
                }   
            }

            lastSelectedPosition = isChecked ? getPosition : -1;  // remember last selected position
        }
    });
    holder.checkbox.setTag(position);

更新

要避免RecyclerView异常，请尝试在处理程序中包含notifyItemChanged调用：

Handler handler = new Handler();
final Runnable r = new Runnable() {
    public void run() {
        notifyItemChanged(lastSelectedPosition); // notify adapter
    }
};
handler.post(r);

---

在模型类中取一个布尔值：

private boolean isCheck;

public boolean isCheck() {
    return isCheck;
}

public void setCheck(boolean check) {
    isCheck = check;
}

在适配器的onBindViewHolder中：

private CompoundButton.OnCheckedChangeListener checkedListener = new CompoundButton.OnCheckedChangeListener() {                      
                        @Override
                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                            // TODO Auto-generated method stub
                int getPosition = (Integer) v.getTag();  // Here we get the position that we have set for the checkbox using setTag.
                boolean flag= movieItems.get(getPosition).isCheck();
                 for (int i = 0; i < movieItems.size(); i++) {
                     if (getPosition == i) {
                      movieItems.get(getPosition).setCheck(true);
                      } else {
                      movieItems.get(getPosition).setCheck(false);
                      }
                     }

                notifyDataSetChanged();
               // m.setSelected(isChecked);


                    });;

@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
     holder.checkbox.setOnCheckedChangeListener(null);
     holder.checkbox.setChecked(movieItems.get(position).isCheck()); 
     holder.checkbox.setOnCheckedChangeListener(checkedListener);
}

private CompoundButton.OnCheckedChangeListener checkedListener=new CompoundButton.OnCheckedChangeListener（）{
@凌驾
检查更改后的公共无效（复合按钮视图，布尔值已检查）{
//TODO自动生成的方法存根
int getPosition=（Integer）v.getTag（）；//这里我们使用setTag获取为复选框设置的位置。
布尔标志=movieItems.get（getPosition）.isCheck（）；
对于（int i=0；i

只需编写一个toggleCheckBox（）方法，该方法只需检查一个是否选中，它就会取消选中，反之亦然versa@Abserve技术检查onBindViewHolder（）上的POJO类变量调用它的位置？是否要取消选中上一条记录或上一条选择的第二条记录？用一些示例@eenVincibleView解释如何在recycleview中获取getItemAtPosition？您的答案与我预期的一样正常，但出现此错误“当recycleview计算布局或滚动时无法调用此方法”@lubilisprevoius值未选中@Nisarg@Abserve技术人员：您想一次只检查一个，对吗？在更新您的日志后，我已经发布了我的logcat错误answer@AbserveTech尝试notifyItemChanged（getPosition）；而不是notifyDataSetChanged（）；@Abserve Tech如果这不起作用，请告诉我我们还有其他解决方案

private CompoundButton.OnCheckedChangeListener checkedListener = new CompoundButton.OnCheckedChangeListener() {                      
                        @Override
                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                            // TODO Auto-generated method stub
                int getPosition = (Integer) v.getTag();  // Here we get the position that we have set for the checkbox using setTag.
                boolean flag= movieItems.get(getPosition).isCheck();
                 for (int i = 0; i < movieItems.size(); i++) {
                     if (getPosition == i) {
                      movieItems.get(getPosition).setCheck(true);
                      } else {
                      movieItems.get(getPosition).setCheck(false);
                      }
                     }

                notifyDataSetChanged();
               // m.setSelected(isChecked);


                    });;

@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
     holder.checkbox.setOnCheckedChangeListener(null);
     holder.checkbox.setChecked(movieItems.get(position).isCheck()); 
     holder.checkbox.setOnCheckedChangeListener(checkedListener);
}