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  1. PO
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    <p>Ok, it seems like the Android platform has a few wrinkles when using library projects. I noticed that the R class of my project and the R class of the ZXIng library project were conflicting all over the place e.g.</p> <pre><code>public static final class id { ... public static final int mainmenu_btn_scan=0x7f070028; ... </code></pre> <p>And in the library project's R class:</p> <pre><code>public static final class id { ... public static final int share_app_button=0x7f070028; ... </code></pre> <p>This explains how a UI element from my activity was being picked up by an activity in the library project. Android will give priority to resources ids in the main project.</p> <p>This excellent article gave the solution: <a href="http://blog.blackmoonit.com/2010/12/android-sharing-resources-in-eclipse.html" rel="nofollow">http://blog.blackmoonit.com/2010/12/android-sharing-resources-in-eclipse.html</a></p> <p>In CaptureActivity (the activity I was calling in the library), I replaced</p> <pre><code>viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view); </code></pre> <p>With this</p> <pre><code>viewfinderView = (ViewfinderView) findViewById( getResources().getIdentifier("viewfinder_view", "id", getPackageName()) ); </code></pre> <p>This fixed the issue, although I'll need to go through and replace all direct id references with getIndentifier() to ensure there aren't any other conflicts. Not an ideal solution. It feels like there ought to be some fairly straightforward extension to the aapt tool to ensure that the ids between R classes don't conflict. </p> <p>See here for more info: <a href="http://devmaze.wordpress.com/2011/05/22/android-application-android-libraries-and-jar-libraries/" rel="nofollow">http://devmaze.wordpress.com/2011/05/22/android-application-android-libraries-and-jar-libraries/</a></p>
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    1. POAndroid drawable resource id conflict?
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    1. USJarrod Smith
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    1. COI think that's the long-way-round solution -- you can also just make sure to import the right R, or, use your.package.R.id.viewfinder_view to differentiate. This is more a question of Java imports. It also kind of highlights the issue in reusing a project that's not meant to be copied, not as a library project.
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      1. USSean Owen
    2. COI don't think so, the real problem is that there are collisions in the ids in the R classes. com.somelib.R.share_app_button == com.myapp.R.mainmenu_btn_scan, the correct R file is being used, but due to the collisions and Android's resource priority rules, the library's R file ids end up referencing resources in my application.
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