Question

我正在创建一个包含TextView列表的ListView。我想根据某些条件在每个ListView项中添加一个额外的CheckBox或EditText。如何设置特定CheckBox和EditText的可见性？

这是我的代码，目前它会影响ListView中所有CheckBoxes和EditTexts的可见性。

 private class AdapterQuestions extends ArrayAdapter<Question> {
    private List<Question> listQuestions;

    public AdapterQuestions(Context context, List<Question> list_questions){
        super(context, R.layout.listitem_question, list_questions);
        listQuestions = list_questions;
    }

    public View getView(int position, View convertView, ViewGroup parent){
        LayoutInflater inflater = LayoutInflater.from(getContext());

        View item = inflater.inflate(R.layout.listitem_question, null);

        TextView tvQuestionText = (TextView)item.findViewById(R.id.tvQuestionText);
        tvQuestionText.setText("[" + listQuestions.get(position).getQuestionId().toString() + "] " + listQuestions.get(position).getQuestionTxt());
        CheckBox cb = (CheckBox) item.findViewById(R.id.cbQuestionCheckbox);
        EditText et = (EditText) item.findViewById(R.id.etQuestionMultiline);

        if(listQuestions.get(position).getQuestionType().toString()=="1"){
               cb.setVisibility(View.VISIBLE);
        } else if(listQuestions.get(position).getQuestionType().toString()=="4"){
                et.setVisibility(View.VISIBLE);
        }

        return item;
    }

}

Answer 1

比较Strings时，您必须使用以下方法：

.equals()

即：

if(listQuestions.get(position).getQuestionType().toString().equals("1") ){
      cb.setVisibility(View.VISIBLE);
} else if(listQuestions.get(position).getQuestionType().toString().equals("4") ){
     et.setVisibility(View.VISIBLE);
}

Answer 2

将CheckBox或EditText设置为不可见，如：

if(listQuestions.get(position).getQuestionType().toString()=="1"){
    cb.setVisibility(View.VISIBLE);
    et.setVisibility(View.INVISIBLE);
} else if(listQuestions.get(position).getQuestionType().toString()=="4"){
    et.setVisibility(View.VISIBLE);
    cb.setVisibility(View.INVISIBLE);
}

如何根据条件更改ListView项目中CheckBox的可见性？

2 个答案: