Android studio NoClassDefFoundError - android.support.v7.app.AppCompatDelegateImplV14 -


i have upgraded project eclipse android studio. getting below error after app launch

java.lang.noclassdeffounderror: android.support.v7.app.appcompatdelegateimplv14             @ android.support.v7.app.appcompatdelegate.create(appcompatdelegate.java:93)             @ android.support.v7.app.appcompatdelegate.create(appcompatdelegate.java:77)             @ android.support.v7.app.appcompatactivity.getdelegate(appcompatactivity.java:429)             @ android.support.v7.app.appcompatactivity.oncreate(appcompatactivity.java:57)             @ com.lib.base.nbaseactionbaractivity.oncreate(nbaseactionbaractivity.java:39)             @ com.app.home.homefragmentactivity.oncreate(homefragmentactivity.java:254)             @ android.app.activity.performcreate(activity.java:5990)             @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1106)             @ android.app.activitythread.performlaunchactivity(activitythread.java:2278)             @ android.app.activitythread.handlelaunchactivity(activitythread.java:2387)             @ android.app.activitythread.access$800(activitythread.java:151)             @ android.app.activitythread$h.handlemessage(activitythread.java:1303)             @ android.os.handler.dispatchmessage(handler.java:102)             @ android.os.looper.loop(looper.java:135)             @ android.app.activitythread.main(activitythread.java:5254)             @ java.lang.reflect.method.invoke(native method)             @ java.lang.reflect.method.invoke(method.java:372)             @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:903)             @ com.android.internal.os.zygoteinit.main(zygoteinit.java:698)

what cause issue? have added appcompat v7 gradle as,

compile 'com.android.support:appcompat-v7:22.2.0'

thanks in advance.


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