java.lang.ClassNotFoundException on working app

android, classnotfoundexception

Solution

Yep, I had this exact same problem. It was because I specified the `android:name` attribute in the application node in the manifest file.

Your Android Manifest file probably looks something like this:

   <application 
       android:name="Novak ESC Track guide" 
       android:icon="@drawable/icon" 
       android:label="@string/app_name" 
       android:description="@string/help_text" >

Do not use the `android:name` attribute! unless you've implemented a custom Application object.

The `application:name` attribute has nothing to do with the name of your app. This is the name of a specific class to load as your `Application` instance. That's why you would get the `ClassNotFoundException` if that class wouldn't exist.

For the name of the app use the `android:label` attribute on this same application node instead.

Remove it and it should work:

<application 
    android:icon="@drawable/icon" 
    android:label="@string/app_name" 
    android:description="@string/help_text" >

Problem

I have created and published my first Android app. It's very simple. It works fine on simulator and some phones, but I am getting this error: ``` java.lang.RuntimeException: Unable to instantiate application cz.teamnovak.droid.Novak ESC Track guide: java.lang.ClassNotFoundException: cz.teamnovak.droid.Novak ESC Track guide in loader dalvik.system.PathClassLoader[/data/app/cz.teamnovak.droid-1.apk] at android.app.ActivityThread$PackageInfo.makeApplication(ActivityThread.java:649) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4232) at android.app.ActivityThread.access$3000(ActivityThread.java:125) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2071) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:4627) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassNotFoundException: cz.teamnovak.droid.Novak ESC Track guide in loader dalvik.system.PathClassLoader[/data/app/cz.teamnovak.droid-1.apk] at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) at java.lang.ClassLoader.loadClass(ClassLoader.java:573) at java.lang.ClassLoader.loadClass(ClassLoader.java:532) at android.app.Instrumentation.newApplication(Instrumentation.java:942) at android.app.ActivityThread$PackageInfo.makeApplication(ActivityThread.java:644) ... 11 more ``` Any idea what can cause this?

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