我正在尝试根据频道中未读消息的数量从文本视图设置颜色。就像这样:
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:
android:textColor="@color/selector_conversation_row_title_unread"
此代码将 textColor 设置为选择器,如果我按 TextView,颜色会发生变化,这与第一个语句不同。
选择器对话行标题未读:
<?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>
选择器对话行标题读取:
<?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"
Android 数据绑定不了解资源类型,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}"
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