Java maven更新项目后应用程序崩溃

我对Eclipse中的Maven有一个奇怪的问题。我试图给我的项目添加一些依赖项，但失败了。为了解决这个问题，我右键点击project，并在下拉菜单中选择Maven->Update project。之后，每当我试图运行它时，我的项目就会崩溃。我在LogCat中有以下错误：

FATAL EXCEPTION: main
Process: com.my.synch, PID: 16267
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.my.synch/synch.ui.activities.concreteactivities.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "synch.ui.activities.concreteactivities.MainActivity" on path: DexPathList[[zip file "/data/app/com.my.synch-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.my.synch-1, /vendor/lib, /system/lib]]
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2163)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2286)
    at android.app.ActivityThread.access$800(ActivityThread.java:144)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1246)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:212)
    at android.app.ActivityThread.main(ActivityThread.java:5135)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
    at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.ClassNotFoundException: Didn't find class "synch.ui.activities.concreteactivities.MainActivity" on path: DexPathList[[zip file "/data/app/com.my.synch-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.my.synch-1, /vendor/lib, /system/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2154)
    ... 11 more

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为什么会这样

您的类MainActivity是否位于该类未找到异常错误上指定的路径上

java.lang.ClassNotFoundException:未找到类synch.ui.activities.concreteactivities.MainActivity

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此错误是maven找不到此类。

发布项目中的POM或片段可能有助于诊断问题。MainActivity存在，在我选择更新项目选项之前，我的应用程序运行良好