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    <blockquote> <p>Library project is referenced as a raw project dependency (source-based mechanism), not as a compiled jar dependency (compiled-code based library mechanism).</p> </blockquote> <p>@yorkw this is not true for the latest versions of ADT Plugin for Eclipse <a href="http://developer.android.com/sdk/eclipse-adt.html" rel="noreferrer">http://developer.android.com/sdk/eclipse-adt.html</a></p> <p><strong>From version 17 Change log</strong></p> <blockquote> <p>New build features Added feature to automatically setup JAR dependencies. Any .jar files in the /libs folder are added to the build configuration (similar to how the Ant build system works). Also, .jar files needed by library projects are also automatically added to projects that depend on those library projects. (more info)</p> </blockquote> <p>More info <a href="http://tools.android.com/recent/dealingwithdependenciesinandroidprojects" rel="noreferrer">http://tools.android.com/recent/dealingwithdependenciesinandroidprojects</a></p> <p>Before that, update overwriting of the Activity from Library project was easy, just exclude the class. Now the library is included as jar file, and there is no way to exclude class file from jar dependency.</p> <p>EDIT:</p> <p>My solution to overwrete/extend Activity from library jar:</p> <p>I created a simple util class:</p> <pre><code>public class ActivityUtil { private static Class getActivityClass(Class clazz) { // Check for extended activity String extClassName = clazz.getName() + "Extended"; try { Class extClass = Class.forName(extClassName); return extClass; } catch (ClassNotFoundException e) { e.printStackTrace(); // Extended class is not found return base return clazz; } } public static Intent createIntent(Context context, Class clazz) { Class activityClass = getActivityClass(clazz); return new Intent(context, activityClass); } } </code></pre> <p>In order to overwrite a library's "SampleActivity" class it a the project which depends on that library, create a new class with the name SampleActivityExtended in the project in the same package and add the new activity to your AndroidManifest.xml.</p> <p>IMPORTANT: all intents referencing overwritten activities should be created through the util class in the following manner:</p> <pre><code>Intent intent = ActivityUtil.createIntent(MainActivity.this, SampleActivity.class); ... startActivity(intent); </code></pre>
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    1. COElegant solution - I like it - thanks
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      1. USStev_k
    2. COthis is an excellent solution. I made some changes to allow the Extended class to reside in the `Application Project`'s package instead of the `Library Project` package. If you think it's an improvement you can include the edit. I changed the way you got your `extClassName` to this: `String pkgName = context.getPackageName(); String extClassName = pkgName + "." + clazz.getSimpleName() + "Extended";` You will also need to pass the context through to `getActivityClass()`
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      1. USTony Chan
    3. COunfortunately this won't work with proguard. Perhaps this system can be used for development, then a search/replace script can be run over the source prior to a release build.
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