Android Studio 1.2.2 Classnotfoundexception Android.widget.viewstub

I just installed Android Studio and whenever I start a project (even the default 'Hello world' activity created by the IDE). I have this exception which is raised : java.lang.Cl

Solution 1:

If you are getting this exception because you have set exception breakpoint, then instead of debugging, remove all breakpoints, just run the code,go to logcat and check the logs for the actual exception. You could be trying to access a nested component like button from the grandparent and therefore the error.

Solution 2:

ViewStub lays in a package called android.view, not android.widget. Change the import directive and see if it helps.

Solution 3:

Old question, but I had this same issue with Android Studio 2.3

With a project that had 4 modules, the trouble was that I had a misspelling in one of the gradle.build files for one of the modules in the applicationId value.

defaultConfig {
        applicationId "com.my.project"
}

After fixing this, and verifying all of the AndroidManifest.xml values for package matched the build.gradle value above within each module, it worked.

<manifestxmlns:android="http://schemas.android.com/apk/res/android"package="com.my.project"></manifest>

You may also need to go to File > Invalidate Caches / Restart... to clean it all out.

Solution 4:

the method findClass(String name) of the classLoader that defined by yourself don't throws ClassNotFoundException.