Error: Error parsing XML: unbound prefix in XML

Question

I am trying to use a cardview in my project, but while I am creating my XML file for my cardview, I keep getting the error

error: Error parsing XML: unbound prefix

but if I take out my cardview widget, it works. I looked at other questions and tried their responses but it isn't working. Does anyone see what is wrong with my code?

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="horizontal" >

     <android.support.v7.widget.CardView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_margin="8dp"
         card_view:cardCornerRadius="2dp" >
     </android.support.v7.widget.CardView>

 </LinearLayout>

http://stackoverflow.com/questions/2221221/frequent-problem-in-android-view-error-parsing-xml-unbound-prefix — VVB, Mar 17 '15 at 05:27

Raghunandan · Answer 1 · 2015-03-17T05:17:42.070

2

Try this

<LinearLayout
xmlns:card_view="http://schemas.android.com/apk/res-auto"

You are missing the prefix for card_view.

This is necessary when using any XML attributes defined by the support library, because these attributes do not exist in the Android framework on older devices.

You could also do

<android.support.v7.widget.CardView
 xmlns:card_view="http://schemas.android.com/apk/res-auto"

edited Mar 17 '15 at 05:17

answered Mar 17 '15 at 05:08

Raghunandan

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score 2 · Accepted Answer · answered Mar 17 '15 at 05:08

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:card_view="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="horizontal" >

 <android.support.v7.widget.CardView
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_margin="8dp"
     card_view:cardCornerRadius="2dp" >
 </android.support.v7.widget.CardView>

you should add xmlns:card_view="http://schemas.android.com/apk/res-auto" this for your parent layout

it need not be for the parent layout you can have the namespace defined for cardview also — Raghunandan, Mar 17 '15 at 05:28
if u add it to the parent then u don't have to repeat with all views you adding. — mujeeb.omr, Mar 17 '15 at 05:34

Error: Error parsing XML: unbound prefix in XML

2 Answers2