1

大家好，我想在 itemsetchenge 列表器中未选中复选框时删除元素。这是我的代码

  checkbox_timeslot.clear();

          chk.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub

                String chetimeslot;

                if(isChecked){          

                chetimeslot = (String)chk.getTag();
                checkbox_timeslot.add(chetimeslot);             
                Log.e("array value", ""+checkbox_timeslot);             
                Log.e("checked slo value", ""+chetimeslot);

                }else{          

                checkbox_timeslot.add("");
                Log.e("else array value", ""+checkbox_timeslot);    

            }        
        }

        });

“checkbox_timeslot”是我的字符串数组列表。我想删除未选中复选框中的元素并在从复选框列表中选中时添加项目..这有什么帮助？

4

4 回答 4

7 
if(isChecked){          

    chetimeslot = (String)chk.getTag();
    checkbox_timeslot.add(chetimeslot);             
    Log.e("array value", ""+checkbox_timeslot);             
    Log.e("checked slo value", ""+chetimeslot);

} else{          

     chetimeslot = (String)chk.getTag();
     checkbox_timeslot.remove(chetimeslot);
     Log.e("else array value", ""+checkbox_timeslot);    

}
于 2012-09-19T06:51:04.517 回答
0

使用 add(item) 将元素添加到数组列表。remove(item) 从列表中删除。

chetimeslot = (String)chk.getTag();
if(isChecked){

    checkbox_timeslot.add(chetimeslot);

} else{          

    checkbox_timeslot.remove(chetimeslot);

}
于 2012-09-19T06:55:24.063 回答
0 
     if(isChecked){

           chetimeslot = (String)chk.getTag();
           checkbox_timeslot.add(chetimeslot);

        }else{

          chetimeslot = (String)chk.getTag();
          checkbox_timeslot.remove(chetimeslot);
        }
}
于 2012-09-19T07:14:39.897 回答
0

我今天遇到的同样的问题。这就是我解决它的方法。我正在使用 RecyclerView 发布我的整个适配器类。

package com.aqua.machinetest;

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;
import java.util.List;

/**
 * Created by Danish.sharma on 5/9/2017.
 */

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

    private List<Governate> governateList;
    public static ArrayList<String> arrayListSelectedContacts = new ArrayList<>();
    Context context;

    public GovernateListAdapter(List<Governate> governateList, Context context) {
        this.governateList = governateList;
        this.context = context;
    }

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

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {
        Governate governate = governateList.get(position);
        holder.title.setText(governate.getName());

        holder.checkBox.setChecked(governateList.get(position).getCheckedBox());
        holder.checkBox.setTag(governateList.get(position));

        holder.checkBox.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {

                CheckBox cb = (CheckBox) v;
                Governate governate1 = (Governate) cb.getTag();

                governate1.setCheckedBox(cb.isChecked());
                governateList.get(position).setCheckedBox(cb.isChecked());
                System.out.println("selected contacts list " + governate1.getId());

                //Toast.makeText(v.getContext(), contact.getName() + " is " + cb.isChecked(), Toast.LENGTH_LONG).show();

                if (cb.isChecked()) {
                    arrayListSelectedContacts.add(governateList.get(position).getId());
                } else {
                    arrayListSelectedContacts.remove(governateList.get(position).getId());
                }

                System.out.println("selected contacts list 3 " + arrayListSelectedContacts);
                Toast.makeText(context, arrayListSelectedContacts.size() + " Added", Toast.LENGTH_SHORT).show();
            }
        });

    }

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

    public class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView title;
        public CheckBox checkBox;


        public MyViewHolder(View view) {
            super(view);
            title = (TextView) view.findViewById(R.id.textView_Title);
            checkBox = (CheckBox) view.findViewById(R.id.checkBox);
        }
    }
}

这是我的 pojo 课：

package com.aqua.machinetest;

import android.os.Parcel;
import android.os.Parcelable;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Danish.sharma on 5/9/2017.
 */

public class Governate  {
    String id;
    String name;
    Boolean checkedBox = false;
 //   List<Governate> governateList = new ArrayList<>();

    public Governate() {

    }

    public Governate(String id, String name) {
        this.id = id;
        this.name = name;
       // this.governateList = governateList;
    }

    protected Governate(Parcel in) {
        id = in.readString();
        name = in.readString();
    }



    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Boolean getCheckedBox() {
        return checkedBox;
    }

    public void setCheckedBox(Boolean checkedBox) {
        this.checkedBox = checkedBox;
    }


}

最后：这是我实现 onClickListener 的片段

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.linear_Next:
            try {
                if (GovernateListAdapter.arrayListSelectedContacts.size() == 0) {
                    Toast.makeText(getActivity(), "No data selected.", Toast.LENGTH_SHORT).show();

                } else if (GovernateListAdapter.arrayListSelectedContacts.size() > 0) {
                    Toast.makeText(getActivity(), "Selected data=" + GovernateListAdapter.arrayListSelectedContacts.size(),
                            Toast.LENGTH_SHORT).show();



                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            break;
    }
}
于 2017-05-09T10:40:11.620 回答