我创建了包含图像和标题的自定义布局。为了重用这个布局,我使用了 <include>
标签。问题是我什至无法将字符串文字绑定(bind) 到包含的布局中。我试着按照这些instructions , 但没有成功。
layout/titlebar.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
<data>
<variable name="title" type="String"/>
<!-- <variable name="imgSrc" type="android.graphics.drawable.Drawable" /> -->
</data>
<LinearLayout ... >
<!-- <ImageView ... android:src="{imgSrc}" /> -->
<TextView ... android:text="@{title, default=DefaultTitle}" />
</LinearLayout>
</layout>
layout/otherlayout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:bind="http://schemas.android.com/apk/res-auto"
...
>
<!-- bind:imgSrc="@{@drawable/some_image}" -->
<include layout="@layout/titlebar"
bind:title="@{Example}" <---------- does not work
/>
...
</LinearLayout>
在 gradle 中,我为模块启用了数据绑定(bind):
android {
...
dataBinding {
enabled = true
}
...
}
最佳答案
根据@CzarMatt 的回答修复了 layout/otherlayout.xml
<?xml version="1.0" encoding="utf-8"?>
<!--
layout with bindings has to be wrapped in <layout> tag so {LayoutName}Bindings
class can be auto-generated for binding purposes
xmlns:alias="http://schemas.android.com/apk/res-auto"
creates an "app namespace" for custom attributes
-->
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:bind="http://schemas.android.com/apk/res-auto">
<LinearLayout ... >
<!--
// if this layout is also using title "data variable"
// and we want to use default value if title is null
bind:title='@{title ?? "Settings"}
// passing literal reference into the binding
bind:title="@{@string/settings_constant}"
-->
<include layout="@layout/titlebar"
bind:title='@{"Settings"}'
/>
...
</LinearLayout>
</layout>
数据绑定(bind)需要按照@RaviRupareliya 的建议通过DataBindingUtil
设置布局,否则数据绑定(bind)将不起作用:
public class OtherActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.otherlayout);
DataBindingUtil.setContentView(this, R.layout.otherlayout);
}
...
}
关于android - Android 中的静态数据绑定(bind) [文字],我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44660660/