android - FloatingActionButton Unable to start activity ComponentInfo -

i want use floating action button in application ,to got latest support library 22.2.1 , add application library. cleaned project , there no more errors . put code in xml layout , when run application ,i ran error couldn't solve .

this xml code :

<?xml version="1.0" encoding="utf-8"?> <scrollview xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical"     android:padding="4dp" >      <linearlayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:orientation="vertical" >         <android.support.design.widget.floatingactionbutton             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_gravity="bottom"             android:layout_margin="16dp"             android:clickable="true"             android:src="@drawable/ic_action_person" />     </linearlayout>  </scrollview> 

this no whole code ,i've other views in linearlayout , @ end put floatingactionbutton.

when run application ,i error :

   fatal exception: main java.lang.runtimeexception: unable start activity componentinfo{com.karaj.project/com.karaj.project.fistactiivty}: android.view.inflateexception: binary xml file line #301: error inflating class android.support.design.widget.floatingactionbutton     @ android.app.activitythread.performlaunchactivity(activitythread.java:2211)     @ android.app.activitythread.handlelaunchactivity(activitythread.java:2261)     @ android.app.activitythread.access$600(activitythread.java:141)     @ android.app.activitythread$h.handlemessage(activitythread.java:1256)     @ android.os.handler.dispatchmessage(handler.java:99)     @ android.os.looper.loop(looper.java:137)     @ android.app.activitythread.main(activitythread.java:5103)     @ java.lang.reflect.method.invokenative(native method)     @ java.lang.reflect.method.invoke(method.java:525)     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:737)     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:553)     @ dalvik.system.nativestart.main(native method) caused by: android.view.inflateexception: binary xml file line #301: error inflating class android.support.design.widget.floatingactionbutton     @ android.view.layoutinflater.createviewfromtag(layoutinflater.java:707)     @ android.view.layoutinflater.rinflate(layoutinflater.java:755)     @ android.view.layoutinflater.rinflate(layoutinflater.java:758)     @ android.view.layoutinflater.inflate(layoutinflater.java:492)     @ android.view.layoutinflater.inflate(layoutinflater.java:397)     @ com.karaj.project.draweractivity.setcontentview(draweractivity.java:73)     @ com.karaj.project.fistactiivty.oncreate(fistactiivty.java:88)     @ android.app.activity.performcreate(activity.java:5133)     @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1087)     @ android.app.activitythread.performlaunchactivity(activitythread.java:2175)     ... 11 more caused by: java.lang.classnotfoundexception: didn't find class "android.support.design.widget.floatingactionbutton" on path: dexpathlist[[zip file "/data/app/com.karaj.persiandesigners-1.apk"],nativelibrarydirectories=[/data/app-lib/com.karaj.persiandesigners-1, /system/lib]]     @ dalvik.system.basedexclassloader.findclass(basedexclassloader.java:53)     @ java.lang.classloader.loadclass(classloader.java:501)     @ java.lang.classloader.loadclass(classloader.java:461)     @ android.view.layoutinflater.createview(layoutinflater.java:559)     @ android.view.layoutinflater.createviewfromtag(layoutinflater.java:696)     ... 20 more 

what doing wrong ?

do not add support library jar file project add line gradle file

compile 'com.android.support:design:22.2.1' 

and update android support "repository"

http://android-developers.blogspot.com/2015/05/android-design-support-library.html