Question

我已经在谷歌尝试过这方面的每一个答案，但没有一个对我有用。

我刚刚在Android工作室创建了一个应用程序，并添加.jar文件并运行它。

但是应用程序因以下错误消息而崩溃。

FATAL EXCEPTION: main Process: com.vtek.cam_pwr_flsh_cntrl, PID: 4850     
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.vtek.cam_pwr_flsh_cntrl/com.vtek.cam_pwr_flsh_cntrl.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.vtek.cam_pwr_flsh_cntrl.MainActivity" on path: DexPathList[[zip file "/data/app/com.vtek.cam_pwr_flsh_cntrl-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.vtek.cam_pwr_flsh_cntrl-2, /vendor/lib, /system/lib]]
                                                     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
                                                     at android.app.ActivityThread.access$800(ActivityThread.java:135)
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
                                                     at android.os.Handler.dispatchMessage(Handler.java:102)
                                                     at android.os.Looper.loop(Looper.java:136)
                                                     at android.app.ActivityThread.main(ActivityThread.java:5017)
                                                     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:779)
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
                                                     at dalvik.system.NativeStart.main(Native Method)
                                                  Caused by: java.lang.ClassNotFoundException: Didn't find class "com.vtek.cam_pwr_flsh_cntrl.MainActivity" on path: DexPathList[[zip file "/data/app/com.vtek.cam_pwr_flsh_cntrl-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.vtek.cam_pwr_flsh_cntrl-2, /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:2112)
                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
                                                     at android.app.ActivityThread.access$800(ActivityThread.java:135) 
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
                                                     at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                     at android.os.Looper.loop(Looper.java:136) 
                                                     at android.app.ActivityThread.main(ActivityThread.java:5017) 
                                                     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:779) 
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
                                                     at dalvik.system.NativeStart.main(Native Method)

Answer 1

如果您已将该类声明为活动，请检入清单文件。如果遗失，那就去做吧。清理并重新编写代码。希望这会有所帮助。

FATAL EXCEPTION：无法在android studio中实例化活动componentInfo

1 个答案: