我正在尝试创建一个可重复使用的布局included.xml
,然后可以将其注入其他布局并通过标签属性进行自定义。这是我所拥有的:
res/layout/parent.xml
:
<?xml version="1.0" encoding="utf-8"?>
<layout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/com.myself.fancyapp"
>
<include layout="@layout/included"
app:src123="@drawable/my_icon" />
</layout>
res/layout/included.xml
:
<?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"
>
<data>
<variable name="src123" type="android.graphics.drawable.Drawable" />
</data>
<android.support.design.widget.FloatingActionButton
android:src="@{src123}" />
</layout>
app/build.gradle
:
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
dataBinding {
enabled = true
}
....
}
dependencies {
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
}
作为结果,我尝试注入的按钮根本不包含任何图像。
如果在parent.xml
中我将xmlns:app
更改为res-auto
,则我在app/build/intermediate/data-binding-layout-out/debug/layout/parent.xml
中有以下错误:
错误:(17)在package'com.myself.fancyapp'com.myself'
中找不到属性'src123'的资源标识符'
有人知道为什么会发生这种情况以及如何解决此问题?谢谢。
问题是您不为变量使用绑定语法:
<include layout="@layout/included"
app:src123="@drawable/my_icon" />
应该是:
<include layout="@layout/included"
app:src123="@{@drawable/my_icon}" />
无关,但我认为其中不允许作为布局的根部元素。我相信您将不得不围绕包含的正常视图。
<?xml version="1.0" encoding="utf-8"?>
<layout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/com.myself.fancyapp"
>
<FrameLayout android:layout_width="match_parent"
android:layout_height="match_parent">
<include layout="@layout/included"
app:src123="@{@drawable/my_icon}" />
</FrameLayout>
</layout>