How to Re-using Layouts with <include/> with parameters?

Question

I had a problem ,that is I have some ViewGroup,which have almost the same content. like this:

<LinearLayout>     <TextView android:text="aaa"/>     <ImageView android:src="bbb"/> </LinearLayout>  <LinearLayout>     <TextView android:text="ccc"/>     <ImageView android:src="ddd"/> </LinearLayout> 

I want to convert to this:

<include layout="xxLayout"     param1="aaa"     param2="bbb"/> <include layout="xxLayout"     param1="ccc"     param2="ddd"/>   xxLayout.xml <LinearLayout>     <TextView android:text="{param1}"/>     <ImageView android:src="{param2}"/> </LinearLayout> 

I know I can do it use java code.Could it be possible that just use xml ?

Answer 1

This is possible using only xml, thanks to the databinding library:

First wrap xxLayout.xml in a layout and add a databinding class definition that lists the variables you want to pass into the included layout.

<layout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto">      <data>         <variable name="myText" type="java.lang.String"/>         <variable name="mySrc" type="android.graphics.drawable.Drawable"/>     </data>      <LinearLayout>         <TextView android:text="@{myText}"/>         <ImageView android:src="@{mySrc}"/>     </LinearLayout> </layout> 

Then use the databinding library to inflate the including layout and inject the desired values using databinding statements. See the databinding library documentation for details on the databinding expression language and what it supports.

<layout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto">      <LinearLayout>         <include layout="xxLayout"             app:myText="@{`aaa`}"             app:mySrc="@{@drawable/bbb}"/>         <include layout="xxLayout"             app:myText="@{`ccc`}"             app:mySrc="@{@drawable/ddd}"/>     </LinearLayout> </layout>