Question

这是我的自定义列表视图类我正在向下滚动我们的列表视图它未经检查的私人选择单选按钮

private String[] question_name;
private String[] op11, op22, op33, op44;
private Activity context;
RadioGroup rg=null;
private HashMap<Integer,String>selectitem=new HashMap<>();

public QustionAdapter(Activity context, String[] queation, String[] op1, String[] op2,
                      String[] op3, String[] op4) {
    super(context, R.layout.qustion_custom_list, queation);
    this.context = context;
    this.question_name = queation;
    this.op11 = op1;
    this.op22 = op2;
    this.op33 = op3;
    this.op44 = op4;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent)
{
    LayoutInflater inflater = context.getLayoutInflater();

    View listViewItem = inflater.inflate(R.layout.qustion_custom_list, null, false);

    TextView questionname=(TextView)listViewItem.findViewById(R.id.qustion_tb);
    RadioButton op1=(RadioButton)listViewItem.findViewById(R.id.op1);
    RadioButton op2=(RadioButton)listViewItem.findViewById(R.id.op2);
    RadioButton op3=(RadioButton)listViewItem.findViewById(R.id.op3);
    RadioButton op4=(RadioButton)listViewItem.findViewById(R.id.op4);
   rg=(RadioGroup) listViewItem.findViewById(R.id.radio_group);


  //  Toast.makeText(context,"Done :"+rg.getCheckedRadioButtonId(),Toast.LENGTH_LONG).show();
    rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            Model model=new Model();

            RadioButton rb=(RadioButton) group.findViewById(checkedId);
           // Toast.makeText(context,"Done :"+rb.getText(),Toast.LENGTH_LONG).show();
            String sel=rb.getText().toString();
            selectitem.put(position,sel);
            model.setSelectResult(selectitem);
        }
    });


    questionname.setText(question_name[position]);
    op1.setText(op11[position]);
    op2.setText(op22[position]);
    op3.setText(op33[position]);
    op4.setText(op44[position]);

    return listViewItem;
}'

当我选择第一个无线电组按钮时，它会选择，但当我回到无线电组时滚动它，它的控制未经检查。

Answer 1

您必须使用具有布尔值的所有对象的模型类进行检查和取消选中，并且设置getter和setter方法并访问get view（）方法中的值，检查或取消选中并设置值为观点。

       @Override
       public void onBindViewHolder(final MyViewHolder holder, final inposition)             {     
        final int pos = position;
        holder.title.setText(list.get(pos).getName());
        if (islongpressed)
        {
            holder.checkBox.setVisibility(View.VISIBLE);
        }
        else holder.checkBox.setVisibility(View.GONE);

        holder.checkBox.setChecked(list.get(pos).isSelected());


try {
    holder.checkBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            CheckBox cb = (CheckBox) v;

            AudioFile contact =list.get(pos);

            contact.setSelected(cb.isChecked());

            list.get(pos).setSelected(cb.isChecked());

        }
    });


}

Answer 2

我们走了

SELECT name, database_id, log_reuse_wait, log_reuse_wait_desc FROM sys.databases

自定义列表视图适配器中的无线电组在滚动值中取消选中

2 个答案: