Remove xmlns:android="http://schemas.android.com/apk/res/android"
for RelativeLayout
. That is need only for the root element ie ScrollView
<RelativeLayout
android:id="@+id/RelativeLayout01"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
>
Remove this
tools:context="com.easy.convert.MainActivity"
or add xmlns:tools="http://schemas.android.com/tools"
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/ScrollView01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context="com.easy.convert.MainActivity">
Edit:
xmlns:android="http://schemas.android.com/apk/res/android
is the xml name space for android.
xmlns:tools="http://schemas.android.com/tools"
http://schemas.android.com/tools
is the namespace uri and the prefix is tools
. You can find a list of tools attribute @