TabHost layout and DataBinding

Question

I read about android data binding and want to use it in my application, but I failed on xml layout stage.

I have activity_main.xml like this:

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
<data>
</data>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TabWidget
        android:id="@android:id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <FrameLayout
        android:id="@android:id/tabcontent"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:id="@+id/tab1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <include layout="@layout/tab1"/>

        </LinearLayout>

    </FrameLayout>
</LinearLayout>
</TabHost>
</layout>

and tab1.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
<EditText
...

I want apply data binding to the last EditText, but if I insert

<layout xmlns:android="http://schemas.android.com/apk/res/android">
   <data>
   </data>
   <TabHost>
   ...

this causes

activity_main.xml:9: AAPT: Error parsing XML: duplicate attribute

The question is, how should I combind data binding and TabHost to bind EditText in included layout?

Here is repo with code from question

Answer 1

Here's your hint XML: duplicate attribute. It even tells you a line number in the error message, 9, which is roughly within the TabHost element.

Now, which XML attribute is duplicated? The namespace (xmlns:android)

Remove the one that is not at the very top element of the XML in the layout tag

Answer 2

Issue is with xmlns:android

Just remove this xmlns:android="http://schemas.android.com/apk/res/android" from and its done.

Regarding DataBinding, i don't think so you have even implemented it except that tag

take <data> in your activity_main.xml

<data>

    <variable
        name="name"
        type="String"/>

</data>

Pass it with included layout

<include layout="@layout/tab1"
         app:name="@{name}"/>

Now catch that data inside your tab1.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>
        <variable
            name="name"
            type="String"/>
    </data>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <EditText
            android:id="@+id/edit1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_column="1"
            android:layout_row="0"
            android:ems="1"
            android:inputType="text"
            android:text="@{name}" />
    </LinearLayout>
</layout>

You are almost done, now you just need to implement binding in your activity

ActivityMainBinding binding = DataBindingUtil.setContentView(this,R.layout.activity_main);
binding.setName("Email Address");