Question

我正在使用textview和复选框创建自定义列表视图项。每当选中对应于用户的复选框时，我想在祝酒词中看到他的名字。我使用了以下代码：

mUserList.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // TODO Auto-generated method stub
                Toast.makeText(ManualInviteActivity.this, position, Toast.LENGTH_SHORT).show();
                Users1 user = (Users1) parent.getItemAtPosition(position);
                if(user.isSelected()==true)
                {
                    Toast.makeText(getBaseContext(), user.getName(), Toast.LENGTH_SHORT).show();
                }
            }
        });

当我切换复选框时，我看不到任何内容。这里有什么错误？谢谢（isSelected和getName是我自己在用户类中的函数）

适配器代码：

public class UserListAdapter extends ArrayAdapter<Users1> {

    static Context context;
    static int layoutResourceId;
    Users1 data[] = null;

    public UserListAdapter(Context context, int layoutResourceId, Users1[] data) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
    }

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

    static class UserHolder {
        TextView txtTitle;
        CheckBox cbxUser;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        UserHolder holder = null;

        if (row == null) {
            LayoutInflater inflater = ((Activity) context).getLayoutInflater();
            row = inflater.inflate(layoutResourceId, parent, false);
            holder = new UserHolder();
            holder.txtTitle = (TextView) row.findViewById(R.id.user_name);
            holder.cbxUser = (CheckBox) row.findViewById(R.id.user_checked);
            row.setTag(holder);
        } else {
            holder = (UserHolder) row.getTag();
        }

        Users1 weather = data[position];
        holder.txtTitle.setText(weather.title);
        holder.cbxUser.setChecked(weather.isSelected());
        // holder.txtTitle2.setText(weather.title2);
        // holder.txtTitle2.setText(weather.title2);
        // holder.txtTitle3.setText(weather.title3);
        return row;
    }

}

Users1类：

public class Users1 {

    public String title;
    boolean selected = true;

    public Users1()
    {
        super();
    }

    public Users1(String title,boolean selected) {
        super();
        this.selected = selected;
        this.title = title;
    }

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

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

}

Answer 1

您需要使用onCheckedStateChange作为复选框。

Answer 2

您需要为RadioGroup设置一个监听器（而不是您的列表）。像这样：

RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radioGroup1);
    OnCheckedChangeListener OCCL = new OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            switch (checkedId) {
            case R.id.radio1:
                //...
                break;
            case R.id.radio2:
                //...
                break;
            case R.id.radio3:
                //...
                break;
            default:
                break;
            }
        }
    };
    radioGroup.setOnCheckedChangeListener(OCCL);

Answer 3

        holder.checkbox
                .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                    @Override
                    public void onCheckedChanged(CompoundButton buttonView,
                            boolean isChecked) {
                      Toast.makeText(getBaseContext(), user.getName(), Toast.LENGTH_SHORT).show();


                    }
                });

Answer 4

试试这段代码

    public class Customadapter extends BaseAdapter {

    Context context;
    ArrayList<String> names;
  LayoutInflater inflater;
    public Customadapter(Context context, ArrayList<String> names) {
        this.names = names;
        this.context = context;
        inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return names.size();
    }

    @Override
    public Object getItem(int arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getItemId(int arg0) {
        // TODO Auto-generated method stub
        return 0;
    }

    public class Holder {
        TextView name;
        CheckBox check;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup arg2) {
        final Holder holder;
        if(convertView==null)
        {
            holder=new Holder();
            convertView=inflater.inflate(R.layout.checkbox,null);
            holder.name=(TextView) convertView.findViewById(R.id.textView1);
            holder.check=(CheckBox) convertView.findViewById(R.id.checkBox1);
            convertView.setTag(holder);
            holder.check.setId(position);
        }
        else
        {
            holder=(Holder) convertView.getTag();
        }
        holder.name.setText(names.get(position));
        holder.check.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Toast.makeText(context,""+names.get(holder.check.getId()),Toast.LENGTH_SHORT).show();

            }
        });

        return convertView;
    }

}

如何在listview中获取所选用户名

4 个答案: