TextView textColor中的数据绑定选择器 [英] Databinding selector in TextView textColor

问题描述

我试图根据频道中未读消息的数量从textview设置颜色。像这样：

I am trying to set colors from a textview based on the number of unread messages in a channel. Like so:

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

这仅设置标题的颜色，而：

this only sets the color of the title, while:

android:textColor="@color/selector_conversation_row_title_unread"

此代码将textColor设置为选择器，如果我按TextView，则颜色变化与第一条语句不同。

this code sets the textColor as a selector, and if i press the TextView the color changes unlike the first statement.

selector_conversation_row_title_unread：

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：

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>

为什么选择器仅用作：

android:textColor="@color/selector_conversation_row_title_unread"

推荐答案

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 Data Binding doesn't know about resource types, so you must supply it in the expression:

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

这篇关于TextView textColor中的数据绑定选择器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！