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POSpecifying Android project dependencies (in Eclipse)
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  1. POSpecifying Android project dependencies (in Eclipse)
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    copied!<p>I have two Android projects, a 'library project' containing a custom layout, and an 'application project' containing an application which uses the layout.</p> <p>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, I can no longer build. That is; this works:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;se.fnord.android.layout.PredicateLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfasdf" /&gt; &lt;/se.fnord.android.layout.PredicateLayout&gt; </code></pre> <p>Whereas this does not:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;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"&gt; &lt;TextView fnord:layout_horizontalSpacing="1px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfasdf" /&gt; &lt;/se.fnord.android.layout.PredicateLayout&gt; </code></pre> <p>The build fails with a message from aapt:</p> <blockquote> <p>ERROR No resource identifier found for attribute 'layout_horizontalSpacing' in package 'se.fnord.android'</p> </blockquote> <p>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.</p> <p>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 tag in the application manifest, which did not help.</p> <p>So, what do I need to do for the references in the xml-file to work?</p> <p>I don't know if it's relevant, but the 'library' manifest looks like this:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="se.fnord.android" android:versionCode="1" android:versionName="1.0.0"&gt; &lt;/manifest&gt; </code></pre> <p>The 'application' manifest like this:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="se.fnord.appname" android:versionCode="1" android:versionName="1.0.0"&gt; &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt; &lt;activity android:name=".AppName" android:label="@string/app_name"&gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre> <p>(The 'PredicateLayout', btw, is a cleaned-up version of <a href="https://stackoverflow.com/questions/549451">this</a>).</p>
 

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