TextView textColor 中的数据绑定选择器

Question

我正在尝试根据频道中未读消息的数量设置文本视图的颜色。像这样：

android:textColor="@{channel.unreadCount > 0 ? @color/selector_conversation_row_title_unread : @color/selector_conversation_row_title_read}"

这只设置标题的颜色，而：

android:textColor="@color/selector_conversation_row_title_unread"

此代码将 textColor 设置为选择器，如果我按下 TextView，颜色会发生变化，这与第一条语句不同。

selector_conversation_row_title_unread:

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:state_pressed="false" android:color="@color/colorConversationTitleUnread"/>
    <item android:state_focused="true" android:state_pressed="true" android:color="#ffffff"/>
    <item android:state_focused="false" android:state_pressed="true" android:color="#ffffff"/>
    <item android:color="@color/colorConversationTitleUnread"/>
</selector>

selector_conversation_row_title_read:

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:state_pressed="false" android:color="@color/colorConversationTitle"/>
    <item android:state_focused="true" android:state_pressed="true" android:color="#ffffff"/>
    <item android:state_focused="false" android:state_pressed="true" android:color="#ffffff"/>
    <item android:color="@color/colorConversationTitle"/>
</selector>

为什么选择器只能用作？：

android:textColor="@color/selector_conversation_row_title_unread"

Answer 1

Android 数据绑定不知道资源类型，因此您必须在表达式中提供它：

android:textColor="@{channel.unreadCount > 0 ? @colorStateList/selector_conversation_row_title_unread : @colorStateList/selector_conversation_row_title_read}"

TextView textColor 中的数据绑定选择器

Databinding selector in TextView textColor

android

data-binding

textview

selector

textcolor