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POAndroid/ Eclipse: Removing /src folder from build path
 

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    <p>This might sound like a stupid question, but what exactly happens when I remove the /src folder of an Android project from the 'build path' (only MainActivity/gen is left there)? I can still compile and run the project, so what does the build path do?</p> <p>Background: I'm going a bit crazy about the import of a maven-built project to Eclipse. It has the /src/main/package kind of folder structure, so when I import it all the declared package names don't match (obviously a well known problem). My first attempt was to just move the packages up in the folder structure (directly to /src) before importing the project, but that gave me a ton of other problems (concerning import of other packages). </p> <p>Second attempt was (this was recommended on several questions on SO) to just remove the /src folder from the build path and voila, the package declarations work and there's no more shown problems in Eclipse, but I got a very strange problem on runtime and I don't know if it os related to me removing the /src folder from the build path. </p> <p>Edit: Here's the error when running the app. I should add that MyApplication is not an Activity but it extends Application (used to store globals). Google maps is used in that project, but not in the first activity. </p> <pre><code>02-20 14:39:34.781: E/AndroidRuntime(1479): FATAL EXCEPTION: main 02-20 14:39:34.781: E/AndroidRuntime(1479): java.lang.RuntimeException: Unable to instantiate application com.example.myapp.MyApplication: java.lang.ClassNotFoundException: Didn't find class "com.example.myapp.MyApplication" on path: /system/framework/com.google.android.maps.jar:/data/app/com.example.myapp-1.apk 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.app.LoadedApk.makeApplication(LoadedApk.java:504) 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4364) 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.app.ActivityThread.access$1300(ActivityThread.java:141) 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1294) 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.os.Handler.dispatchMessage(Handler.java:99) 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.os.Looper.loop(Looper.java:137) 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.app.ActivityThread.main(ActivityThread.java:5039) 02-20 14:39:34.781: E/AndroidRuntime(1479): at java.lang.reflect.Method.invokeNative(Native Method) 02-20 14:39:34.781: E/AndroidRuntime(1479): at java.lang.reflect.Method.invoke(Method.java:511) 02-20 14:39:34.781: E/AndroidRuntime(1479): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 02-20 14:39:34.781: E/AndroidRuntime(1479): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 02-20 14:39:34.781: E/AndroidRuntime(1479): at dalvik.system.NativeStart.main(Native Method) 02-20 14:39:34.781: E/AndroidRuntime(1479): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.myapp.MyApplication" on path: /system/framework/com.google.android.maps.jar:/data/app/com,example.myapp-1.apk 02-20 14:39:34.781: E/AndroidRuntime(1479): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65) 02-20 14:39:34.781: E/AndroidRuntime(1479): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 02-20 14:39:34.781: E/AndroidRuntime(1479): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.app.Instrumentation.newApplication(Instrumentation.java:968) 02-20 14:39:34.781: E/AndroidRuntime(1479): at android.app.LoadedApk.makeApplication(LoadedApk.java:499) 02-20 14:39:34.781: E/AndroidRuntime(1479): ... 11 more </code></pre>
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    1. COIf you could add some details about your very strange runtime problem that might help people to determine if the problem is related to the src folder being removed.
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    2. COUse `File - Import... - Maven - Existing Maven Projects` to import the existing mavenized Android project, check out [this answer](http://stackoverflow.com/questions/11921769/do-i-need-to-install-an-adt-plugin-if-i-want-to-use-maven/11926069#11926069) to see how to get the required Eclipse plugin.
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    3. COyou should post the log where you get runtime error, could be due to declarations in manifest file
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