Question

我试图在用户检查CheckBox时动态更新（更改颜色和删除文本）ListView中的TextView。

我的代码有点工作，但出于某种原因只在第二次点击复选框，即用户检查没有任何反应，用户取消检查并再次检查TextView然后根据需要更新？

任何帮助表示感谢。

我的代码：

@Override
public View getView(final int position, final View convertView, final ViewGroup parent) {

    View view = convertView;
    if (view == null) {
        view = lInflater.inflate(R.layout.shoppinglist, parent, false);
    }

    String anItem = get_Item(position);//from item array

    ((TextView) view.findViewById(R.id.tvSLItemName)).setText(anItem);

    final CheckBox checkBox = (CheckBox) view.findViewById(R.id.cbBoxSL);

    checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener(){

        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            View aView = convertView;
            if (aView == null) {
                aView = lInflater.inflate(R.layout.shoppinglist, parent, false);
            }
            if(isChecked){  

                checked[position] = true;
                ((TextView) aView.findViewById(R.id.tvSLItemName)).setTextColor(Color.GRAY);
                ((TextView) aView.findViewById(R.id.tvSLItemName)).setPaintFlags(
                        ((TextView) aView.findViewById(R.id.tvSLItemName)).getPaintFlags()
                        | Paint.STRIKE_THRU_TEXT_FLAG);
                //aView.invalidate();
                notifyDataSetChanged();

            }
            else{
                checked[position] = false;
            }

        }
    });

    checkBox.setChecked(checked[position]);
    return view;
}

按以下建议更新了代码：

@Override
public View getView(final int position, final View convertView, final ViewGroup parent) {

    View view = convertView;
    if (view == null) {
        view = lInflater.inflate(R.layout.shoppinglist, parent, false);
    }

    String anItem = get_Item(position);//from item array

    ((TextView) view.findViewById(R.id.tvSLItemName)).setText(anItem);

    final CheckBox checkBox = (CheckBox) view.findViewById(R.id.cbBoxSL);

    checkBox.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            View aView = convertView;
            if (aView == null) {
                aView = lInflater.inflate(R.layout.shoppinglist, parent, false);
            }
            if(((CheckBox) v).isChecked()) {
                checked[position] = true;
                ((TextView) aView.findViewById(R.id.tvSLItemName)).setTextColor(Color.GRAY);
                ((TextView) aView.findViewById(R.id.tvSLItemName)).setPaintFlags(
                        ((TextView) aView.findViewById(R.id.tvSLItemName)).getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
                //aView.invalidate();
                notifyDataSetChanged();
            }else{
                checked[position] = false;
            }

        }
    });

    checkBox.setChecked(checked[position]);
    return view;
}

问题陈述无变化。

Answer 1

嗯，我解决了它，不太确定发生了什么，也许有人可以详细解释一下？无论如何，问题在于我在getView（）中重复声明TextView，只是将其声明为变量（在这种情况下为tv），然后在方法中调用tv。谢谢你的帮助。

        @Override
    public View getView(final int position, final View convertView, final ViewGroup parent) {

        View view = convertView;

        if (view == null) {
            view = lInflater.inflate(R.layout.shoppinglist, parent, false);
        }
        final TextView tv = (TextView)view.findViewById(R.id.tvSLItemName);
        String anItem = get_Item(position);//from item array
        tv.setText(anItem);
        final CheckBox checkBox = (CheckBox) view.findViewById(R.id.cbBoxSL);        
        checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener(){

            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                View aView = convertView;
                if (aView == null) {
                    aView = lInflater.inflate(R.layout.shoppinglist, parent, false);
                }
                if(isChecked){                          
                    checked[position] = true;                       
                    tv.setTextColor(Color.GRAY);                    
                    tv.setPaintFlags(
                            ((TextView) aView.findViewById(R.id.tvSLItemName)).getPaintFlags()
                            | Paint.STRIKE_THRU_TEXT_FLAG);
                    notifyDataSetChanged();     
                }
                else{
                    checked[position] = false;
                }                   
            }
        });         
        checkBox.setChecked(checked[position]);
        return view;
    }

Android刷新TextView与复选框onClick？

1 个答案: