列表选择器在 android 中不起作用

Question

我有一个列表视图，我在其中设置备用背景颜色。现在我想在列表项单击时使用列表选择器。这是我使用游标适配器

的 getView() 设置备用背景的方式

CursorAdapter

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

    final View row = super.getView(position, convertView, parent);
    if (position % 2 == 0)
        row.setBackgroundColor(Color.parseColor("#191919"));
    else
        row.setBackgroundColor(Color.parseColor("#323232"));
    return row;

}

list_selector.xml

<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>

list_item_bg_pressed.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="#FF0000" />
</shape>

list_item_bg_normal.xml

 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
     <solid android:color="#00000000" /> <!-- transparent --> 
 </shape>

最后我有了我的列表视图，我在其中使用了 listSelector。

activity.xml

 <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/myListView"
        android:listSelector="@drawable/list_selector"
        android:drawSelectorOnTop="true"
        android:clickable="true"/>

我无法解决这个问题。不知道哪里错了
我的屏幕输出是这样的

Answer 1

Try like this instead of drawable:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="#00000000" android:state_activated="false"/>
    <item android:drawable="#FF0000" android:state_pressed="true"/>
    <item android:drawable="#FF0000" android:state_activated="true"/>
</selector>

Answer 2

终于，我找到了答案。我创建了两个选择器 XML 文件来提供备用背景。看到这个。

selector_one

<?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/black1" />
    <item android:state_pressed="true" android:drawable="@android:color/holo_red_dark" />
    <item android:state_selected="true" android:state_pressed="false"  android:drawable="@android:color/holo_red_dark" />
</selector>

selector_two

<?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/black2" />
    <item android:state_pressed="true" android:drawable="@android:color/holo_red_dark" />
    <item android:state_selected="true" android:state_pressed="false"  android:drawable="@android:color/holo_red_dark" />
</selector>

并且在适配器的 getView() 方法中我调用了两个选择器。

if (position % 2 == 0) {
    convertView.setBackgroundResource(R.drawable.selector_one);
 } else {
    convertView.setBackgroundResource(R.drawable.selector_two);
 }

我参考了这个Link

列表选择器在 android 中不起作用

List Selector is not working in android

xml

android

selector

android-listview