我正试图使用Android数据绑定功能将一个简单的字符串从主布局传递到include布局。它可以编译通过,但是传递给include的值实际上没有被传递。也就是说,在我的布局中没有显示出来。
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable name="mytitle" type="java.lang.String"/>
</data>
<android.support.constraint.ConstraintLayout
android:background="@color/black_background"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="@+id/include1"
layout="@layout/mylayout"
app:mytitle="@{@string/categories}"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"/>
</android.support.constraint.ConstraintLayout>
</layout>
我的Include布局是:
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
<data>
<variable name="mytitle" type="java.lang.String"/>
</data>
<android.support.constraint.ConstraintLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:background="@color/black_background"
android:layout_height="match_parent">
<TextView
android:id="@+id/category_header_textview"
style="@style/WhiteText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@{mytitle}"
app:layout_constraintStart_toStartOf="parent" />
</android.support.constraint.ConstraintLayout>
</layout>