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Editorial Team
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Asked: 2026-06-02T13:57:09+00:00

The widgets work fine, but the main activity FC’s. The logcat is below: 04-22

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The widgets work fine, but the main activity FC’s.

The logcat is below:

04-22 14:13:58.045: D/AndroidRuntime(2479): Shutting down VM
04-22 14:13:58.045: W/dalvikvm(2479): threadid=1: thread exiting with uncaught exception (group=0x40018560)
04-22 14:13:58.065: E/AndroidRuntime(2479): FATAL EXCEPTION: main
04-22 14:13:58.065: E/AndroidRuntime(2479): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.liamwli.reboot_widget/com.liamwli.reboot_widget.RebootwidgetActivity}: java.lang.ClassNotFoundException: com.liamwli.reboot_widget.RebootwidgetActivity in loader dalvik.system.PathClassLoader[/data/app/com.liamwli.reboot_widget-2.apk]
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1680)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.app.ActivityThread.access$1500(ActivityThread.java:123)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.os.Looper.loop(Looper.java:130)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.app.ActivityThread.main(ActivityThread.java:3835)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at java.lang.reflect.Method.invokeNative(Native Method)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at java.lang.reflect.Method.invoke(Method.java:507)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at dalvik.system.NativeStart.main(Native Method)
04-22 14:13:58.065: E/AndroidRuntime(2479): Caused by: java.lang.ClassNotFoundException: com.liamwli.reboot_widget.RebootwidgetActivity in loader dalvik.system.PathClassLoader[/data/app/com.liamwli.reboot_widget-2.apk]
04-22 14:13:58.065: E/AndroidRuntime(2479):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
04-22 14:13:58.065: E/AndroidRuntime(2479):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1672)
04-22 14:13:58.065: E/AndroidRuntime(2479):     ... 11 more

I am new to android app development, and do not know what the issue is 🙁

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1 Answer

  1. Editorial Team

    Android is looking for a class named com.liamwli.reboot_widget.RebootwidgetActivity and cannot find it. Make sure you have everything spelled correctly, including capitalization.

    I would also recommend getting rid of the underscore in your package name, as that may be causing you problems. Java packages normally are letters, numbers, and dots.

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