Error parsing XML: unbound prefix on XXX解决办法

在XML文件中使用了自定义的域名空间(ns),如app:，编译时报错XXX
XML文件类似于如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout android:orientation="vertical" android:id="@+id/myScrollLayout" android:layout_width="fill_parent"  android:layout_height="wrap_content">    <TextView android:layout_height="wrap_content" android:layout_width="fill_parent"     android:text="Family" android:id="@+id/Family"     android:textSize="16px" android:padding="5px"     android:textStyle="bold" android:gravity="center_horizontal">    TextView>    <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"        android:layout_width="fill_parent" android:layout_height="wrap_content"        android:orientation="vertical" android:scrollbars="vertical">        <LinearLayout android:orientation="vertical" android:id="@+id/myMainLayout"         android:layout_width="fill_parent"  android:layout_height="wrap_content">        LinearLayout>    ScrollView>LinearLayout>

解决方案：
增加域名空间:

A couple of reasons that this can happen:
1. You see this error with an incorrect namespace, or a typo in the attribute. Like ‘xmlns’ is wrong, it should be xmlns:android
2. First node needs to contain:
xmlns:android=”http://schemas.android.com/apk/res/android”
3. If you are integrating AdMob check custom parameters like ads:adSize, you need
xmlns:ads=”http://schemas.android.com/apk/lib/com.google.ads”
4. If you are using LinerLayout you might have to define tools
xmlns:tools=”http://schemas.android.com/tools”
xmlns:app=”http://schemas.android.com/apk/res-auto”

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