Android刷新TextView，复选框点击

Question

当用户选中复选框时，我试图在ListView中动态更新（更改颜色和删除线文本）TextView。

我的代码在某种程度上起作用，但由于某种原因，只有在第二次单击复选框时，即用户检查什么都没有发生，用户第二次取消检查并检查TextView，然后根据需要更新？

感谢您的帮助。

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;
}

更新代码如下：

@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;
}

问题陈述没有更改。

Answer 1

我解决了它，不太确定发生了什么，也许有人可以详细解释？无论如何，问题是我在getView（）中重复声明TextView，简单地将其声明为变量（在本例中为tv），然后在方法中调用tv就可以了。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;
    }