Question

我在我的项目中使用自定义列表视图。当我点击ListView中的项目时，该项目应该会突出显示。

这是listadapter

中使用的代码

@Override
public View getView( final int position, View convertView, ViewGroup parent) {
    View row = convertView;
    SubCategoryHolder holder = null;

      if (row == null) {
          LayoutInflater inflater = ((Activity) context).getLayoutInflater();
           row = inflater.inflate(layoutResourceId, parent, false);
           holder = new SubCategoryHolder();
           holder.dishName = (TextView) row.findViewById(R.id.subcat_name);
           row.setTag(holder);
      }else {
               holder = (SubCategoryHolder) row.getTag();
      }
      final SubcategoryGetSet sub = objects.get(position);
      holder.dishName.setText(sub.getDishName());
      holder.dishName.setTextColor(Color.parseColor("#000000"));


      row.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            v.setSelected(true);
            v.setBackgroundColor(Color.parseColor("#0000e0"));  
        }
    });

    return row;
}

当我点击项目时，它会亮到蓝色。问题是，当我点击另一个项目时，它仍然是高亮度的。如何删除先前选定的背景颜色??

Answer 1

您可以更改所选列表视图项的颜色。下面的代码可能会有所帮助。

首先将其放入listview

机器人：listSelector =＆＃34; @可绘制/ list_selector＆＃34;

然后在drawable中创建xml文件以控制不同的状态

@绘制/ list_selector

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/list_item_bg_normal" android:state_activated="false"/>
<item android:drawable="@drawable/list_item_bg_pressed" android:state_pressed="true"/>
<item android:drawable="@drawable/list_item_bg_pressed" android:state_activated="true"/>
</selector>

@绘制/ list_item_bg_normal

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
  android:startColor="@color/list_background"
  android:endColor="@color/list_background"
  android:angle="90" />
</shape>

@绘制/ list_item_bg_pressed

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
  <gradient
      android:startColor="@color/list_background_pressed"
      android:endColor="@color/list_background_pressed"
      android:angle="90" />
</shape>

在ListView选择中

listView.setOnItemClickListener(new OnItemClickListener() {

         @Override
         public void onItemClick(AdapterView<?> parent, View view, int position,long arg3) {
             view.setSelected(true);
             ...
         }
    }

不要忘记将list_background_pressed和list_background添加到values / color.xml中，或者只是在每个文件中手动设置颜色。

而且我相信当你使用setSelection（int pos）时会自动使用你设置为选择的布局。

Answer 2

试试这个，希望它有所帮助。

        Integer lastSelectedItemPos;//to store last selected view position

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View row = convertView;
            SubCategoryHolder holder;
            if (row == null) {
                holder = new SubCategoryHolder();
                //your inflating stuff and find views
                //setOnClickListener for your layout
                holder.layout.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        int pos = (int) view.getTag();
                        final SubcategoryGetSet sub = objects.get(pos);
                        sub.setSelected(true);//new item selected
                        if (lastSelectedItemPos != null) {
                            sub = objects.get(lastSelectedItemPos);
                            sub.setSelected(false);// dis select previous one
                        }
                        lastSelectedItemPos = pos;
                        notifyDataSetChanged();//refresh views
                    }
                });
                row.setTag(holder);
            } else {
                holder = (SubCategoryHolder) row.getTag();
            }

            holder.layout.setTag(position);//set  position as tag to your layout
            final SubcategoryGetSet sub = objects.get(pos);
            //your other stuff

            if (sub.isSelected())
                row.setBackgroundColor(Color.RED);//selected color
             else
                row.setBackgroundColor(Color.GRAY);//not selected color

            return row;

        }

        class SubCategoryHolder{
            //other views
            LinearLayout layout;
        }
    };

您需要在SubcategoryGetSet

下创建一个额外字段

class SubcategoryGetSet{
    //your other objects, getters and setters
    boolean selected;
    public boolean isSelected() { return selected; }
    public void setSelected(boolean selected) { this.selected = selected; }
}

您需要再添加一个额外视图作为根视图的子视图

<!-- root view (whatever your view is I am using LL )-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="horizontal">
    <!-- add this view as sub child of root view and set listener for this -->
    <LinearLayout
        android:id="@+id/layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <!--your other views/adapter design goes here -->

    </LinearLayout>

</LinearLayout>

Answer 3

我发现这对我来说是最简单的解决方案。在您的XML文件的ListView描述中，只需添加带有所需颜色的以下属性：

android:listSelector="@color/colorBlue"

在自定义列表视图android中设置突出显示的选定项

3 个答案: