android - 仅在导出的 APK : Unable to instantiate activity ComponentInfo 中出错

Question

当我直接从 Android 开发者工具 (ADT) 运行我的应用程序时，它运行良好。但是，当我将其导出到 APK 文件并安装时，出现以下错误:

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{my.app/my.app.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "my.app.MainActivity" on path: DexPathList[[zip file "/data/app/my.app-2.apk"],nativeLibraryDirectories=[/data/app-lib/my.app-2, /vendor/lib, /system/lib]] at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2187) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2311) at android.app.ActivityThread.access$600(ActivityThread.java:149) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1293) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5214) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassNotFoundException: Didn't find class "my.app.MainActivity" on path: DexPathList[[zip file "/data/app/my.app-2.apk"],nativeLibraryDirectories=[/data/app-lib/my.app-2, /vendor/lib, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53) at java.lang.ClassLoader.loadClass(ClassLoader.java:501) at java.lang.ClassLoader.loadClass(ClassLoader.java:461) at android.app.Instrumentation.newActivity(Instrumentation.java:1061) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2178) ... 11 more

Answer 1

问题似乎是 ADT 中的错误。通过 Project -> Clean 手动执行清理，然后重新导出 APK 解决了这个问题。