Question

我正在设置一个这样的ArrayAdapter：

@NonNull
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View view = convertView;
    if(view == null){
        LayoutInflater layoutInflater = LayoutInflater.from(getContext());
        view = layoutInflater.inflate(R.layout.row_product_item, null);
    }

    TextView txtProductName = (TextView)view.findViewById(R.id.txt_product_name);
    TextView txtProductRemaining = (TextView)view.findViewById(R.id.txt_product_remaining);
    TextView txtProductPrice = (TextView)view.findViewById(R.id.txt_product_sale_price);

    String productName = getItem(position).productName;
    String productRemaining = Number.floatToStringAsNumber(getItem(position).productRemaining);
    String productPrice = Number.floatToStringAsPrice(getItem(position).productSellPrice, true);

    txtProductName.setText(productName);
    txtProductRemaining.setText(productRemaining);
    txtProductPrice.setText(productPrice);

    /**
     * Coloring
     */
    if (getItem(position).productRemaining <= 0){
        txtProductRemaining.setTextColor(Color.parseColor("#ff7f7f"));
    }

    return view;

}

每当最后一行的评估返回true时，它都会绘制每个txtProductRemaining。我只需要绘制评估项目。为什么要绘制整个元素集？

Answer 1

ListView重复使用视图，因此一旦一个项目被着色，其他视图也会在加载时被着色。以下是您需要做的以避免这种情况：

if (getItem(position).productRemaining <= 0){
    txtProductRemaining.setTextColor(Color.parseColor("#ff7f7f"));
}
else {
     txtProductRemaining.setTextColor(Color.BLACK));. // Or whatever default color you prefer
}

参考：https://developer.android.com/reference/android/widget/ArrayAdapter.html#getView(int，android.view.View，android.view.ViewGroup）

设置TextView textColor会更改整个ListView项目颜色

1 个答案: