android - 在适配器 getView 方法中更改当前 ListView 项的背景颜色

Question

我正在为 ListView 构建自定义适配器 - 我希望此适配器为 ListView 提供交替背景颜色。

boolean alternate = false;

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

        if (alternate)
        {
            // set background colour of this item?
        }

        alternate = !alternate;

        // lots of other stuff here

        return convertView;     }

如何在上下文中设置 ListView 项的背景？

Answer 1

下面就是这些步骤来做展示。Step1.1) 对奇数和偶数位置列表项使用两个选择器

artists_list_backgroundcolor.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item
 android:state_selected="false"
    android:state_pressed="false"
    android:drawable="@color/grey" />
<item android:state_pressed="true"
    android:drawable="@color/itemselected" />
<item android:state_selected="true"
 android:state_pressed="false"
    android:drawable="@color/itemselected" />
</selector>

步骤 1.2)artists_list_background_alternate.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item
 android:state_selected="false"
    android:state_pressed="false"
    android:drawable="@color/sign_out_color" />
<item android:state_pressed="true"
    android:drawable="@color/login_hover" />
<item android:state_selected="true"
 android:state_pressed="false"
    android:drawable="@color/login_hover" />
</selector>

第二步)颜色.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="survey_toplist_item">#EFEDEC</color>
    <color name="survey_alternate_color">#EBE7E6</color>
    <color name="grey">#ffffff</color>
    <color name="itemselected">#EDEDED</color>
    <color name="login_hover">#E5F5FA</color>
    <color name="sign_out_color">#e84040</color>

</resources>

步骤 3) 在 Arrayadapter 中:

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = convertView;
        if (view == null) {
            view = lInflater.inflate(R.layout.listitem, parent, false);
        }

        if (position % 2 == 0) {
            view.setBackgroundResource(R.drawable.artists_list_backgroundcolor);
        } else {
            view.setBackgroundResource(R.drawable.artists_list_background_alternate);
        }

        ((TextView) view.findViewById(R.id.heading)).setText(data.get(position));

        return view;
    }

有关更多详细信息，请访问 belog 链接

http://amitandroid.blogspot.in/2013/03/android-listview-with-alternate-list.html