Question

我正在开发一个包含项目列表的应用程序，并且从列表视图中选择特定项目，我想要更改所选整行的背景颜色，但在实现这一点时，我的所有行背景颜色都已更改。请有人帮帮我感谢Advace。这是我的Adaptor.xml

 public class Adaptor_ListItem extends ArrayAdapter<MyItem> {
        public Context mContext;
        public ArrayList<MyItem> listItem;
        public LayoutInflater inflater;
        public int position1=-1;

        public Adaptor_ListItem(Context context, int resource, List<MyItem> list,
                int selectedPos) {
            super(context, resource, list);
            // TODO Auto-generated constructor stub
            mContext = context;
            listItem = (ArrayList<MyItem>) list;
            inflater = (LayoutInflater) mContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            position1 = selectedPos;
        } // method ends

        public View getView(int pos, View convertView, ViewGroup parent) {
            View holder = convertView;
            if (holder == null) {
                holder = inflater.inflate(R.layout.adaptor_itemlist, null);
            }
            if (listItem.size() != 0) {

                TextView txtName = (TextView) holder
                        .findViewById(R.id.ListItem_txtName);
                TextView txtDays = (TextView) holder
                        .findViewById(R.id.ListItem_txtDays);
                TextView txtRecurring = (TextView) holder
                        .findViewById(R.id.ListItem_txtRecuring);
                MyItem objItem = listItem.get(pos);
                if (objItem != null) {
                    String strName = objItem.itemName;
                    String strRecurring = objItem.recurring + "";
                    String strDays = objItem.days;
                    int itemId = objItem.itemId;
                    // for checking which item has notified
                    if ((pos== position1) && holder!=null ) {
                        LinearLayout linearLayout = (LinearLayout) holder
                                .findViewById(R.id.linearListItem);
                        txtName.setBackgroundColor(Color.RED);
                        txtDays.setBackgroundColor(Color.RED);
                        txtRecurring.setBackgroundColor(Color.RED);
                        System.out.println("Adaptor_ListItem.getView()//// method block");
                    }
                    if (strDays == null) {
                        txtName.setText(strName);
                        txtDays.setText("0 Days");
                        txtRecurring.setText(strRecurring + "");
                    } else {
                        txtName.setText(strName);
                        txtDays.setText(strDays + " Days");
                        txtRecurring.setText(strRecurring + "");

                    }

                }
            }
            return holder;
        }// method ends
    } // final class ends

Answer 1

请在adaptor_itemlist.xml文件中提及主要布局的背景。

为背景编写选择器：

item_selector.xml:

<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:state_selected="true" android:drawable="@color/red"></item>
<item android:state_selected="false" android:drawable="@android:color/white"></item>

</selector>

将此文件应用于adapter_itemlist.xml

中主要布局的背景

使用以下代码：

linearLayout.setSelected(true);

而不是：

txtName.setBackgroundColor(Color.RED);
txtDays.setBackgroundColor(Color.RED);
txtRecurring.setBackgroundColor(Color.RED);

Answer 2

在自定义适配器的getview中添加此行。

listTextView.setTextColor(Color.parseColor("#aaaaaa"));

Answer 3

使用以下代码代替您的代码：

     public View getView(int pos, View convertView, ViewGroup parent) {
        View v = convertView;

        ViewHolder Holder;

    if (v == null) {
            v = inflater.inflate(R.layout.adaptor_itemlist, null);

            Holder = new ViewHolder();

            Holder.txtName = (TextView) v
                    .findViewById(R.id.ListItem_txtName);
            Holder.txtDays = (TextView) v
                    .findViewById(R.id.ListItem_txtDays);
            Holder.txtRecurring = (TextView) v
                    .findViewById(R.id.ListItem_txtRecuring);
            MyItem objItem = listItem.get(pos);
            v.setTag(Holder);
            }
      else
         holder=(ViewHolder)v.getTag();

      if (objItem != null) {
                String strName = objItem.itemName;
                String strRecurring = objItem.recurring + "";
                String strDays = objItem.days;
                int itemId = objItem.itemId;
                // for checking which item has notified
                if ((pos== position1)) {
                    LinearLayout linearLayout = (LinearLayout) v
                            .findViewById(R.id.linearListItem);
                    Holder.txtName.setBackgroundColor(Color.RED);
                    Holder.txtDays.setBackgroundColor(Color.RED);
                    Holder.txtRecurring.setBackgroundColor(Color.RED);
                    System.out.println("Adaptor_ListItem.getView()//// method block");
                }
        else
       {
                  // set Default Value
               }
                if (strDays.equals(null)) {
                    Holder.txtName.setText(strName);
                    Holder.txtDays.setText("0 Days");
                    Holder.txtRecurring.setText(strRecurring + "");
                } else {
                    Holder.txtName.setText(strName);
                    Holder.txtDays.setText(strDays + " Days");
                    Holder.txtRecurring.setText(strRecurring + "");

                }


        }
        return v;
    }// method ends
} // final class ends

和ViewHolder类是：

 public static class ViewHolder()
 {
    public TextView txtName , txtDays, txtRecurring;
  }

Answer 4

int [] arrayColors={Color.GREEN,Color.BLUE,Color.Red}

此适配器的getview方法中的以下行调用。

yourView.setBackgroundColor(Color.parseColor(arrayColors[pos]));

Answer 5

当（pos！= position1）..或if（pos = position1）语句的else子句时，需要将背景颜色设置回原始颜色。现在发生的事情是，一旦你将列表项设置为红色，它就会被回收到另一行，但它会保持红色，因为它在新的getView（）调用中从未被设置过。

               int feedbackColor = Color.WHITE;  // or whatever your base color is
               if ((pos== position1) && holder!=null ) {
                    LinearLayout linearLayout = (LinearLayout) holder
                            .findViewById(R.id.linearListItem);
                    feedbackColor = Color.RED;

                }
                txtName.setBackgroundColor(feedbackColor);
                txtDays.setBackgroundColor(feedbackColor);
                txtRecurring.setBackgroundColor(feedbackColor);

更改Listview特定行的背景

5 个答案: