Hi all!
This was originally posted as a StackOverflow question (
http://stackoverflow.com/questions/549451
), but following advice from #android I will also post the question
here.
I have two Android projects, a 'library project' containing a custom
layout, and an 'application project' containing an application which
uses the layout.
Everything seems to build and execute fine, except that the visual
layout editor throws a ClassNotFoundException (which I assume is a bug
in the plug-in), but when I try to start to make use of the attributes
I defined for the custom layout in the xml, the build fails. That is;
this works:
<?xml version="1.0" encoding="utf-8"?>
<se.fnord.android.layout.PredicateLayout
xmlns:android="http://schemas.android.com/apk/res/android";
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="asdfasdf"
/>
</se.fnord.android.layout.PredicateLayout>
Whereas this does not:
<?xml version="1.0" encoding="utf-8"?>
<se.fnord.android.layout.PredicateLayout
xmlns:android="http://schemas.android.com/apk/res/android";
xmlns:fnord="http://schemas.android.com/apk/res/se.fnord.android
"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
fnord:layout_horizontalSpacing="1px"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="asdfasdf"
/>
</se.fnord.android.layout.PredicateLayout>
The build fails with a message from aapt:
ERROR No resource identifier found for attribute
'layout_horizontalSpacing' in package 'se.fnord.android'
The resource identifier does exist in the R-file and attrs.xml
contained the library project, and if I put the layout code and
resources directly in the application project everything works fine.
The layout_horizontalSpacing attribute (and layout_verticalSpacing) is
a custom attribute used in the PredicateLayout.LayoutParam class to
specify the distance to the next widget.
So far I've tried the standard eclipse ways by specifying project
references and build path project dependencies. I was also told to try
the <uses-library> tag in the application manifest, which did not help.
So, what do I need to do for the references in the xml-file to work?
I don't know if it's relevant, but the 'library' manifest looks like
this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/
android"
package="se.fnord.android"
android:versionCode="1" android:versionName="1.0.0">
</manifest>
The 'application' manifest like this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/
android"
package="se.fnord.appname"
android:versionCode="1" android:versionName="1.0.0">
<application android:icon="@drawable/icon"
android:label="@string/app_name">
<activity android:name=".AppName"
android:label="@string/app_name">
<intent-filter>
<action
android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
'se.fnord.android.layout.PredicateLayout', btw, is a cleaned-up
version of the layout posted at http://stackoverflow.com/questions/549451
.
Thanks!
// Henrik
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