java - Android Object Animation xml -

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i trying create translate image (ball) using xml objectanimator. when try reference objectanimator xml file, says getapplicationcontext() might return null. when flash phone, crashed immediately. when take out line , setanimationlistener line, works. however, if there 1 of lines, not work.

mainactivity.java

public class mainactivity extends actionbaractivity implements animation.animationlistener{  imageview ball; button moveb1;  animation move;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      ball = (imageview) findviewbyid(r.id.ball);     moveb1 = (button) findviewbyid(r.id.move1);      move = animationutils.loadanimation(getapplicationcontext(),             r.animator.move);      move.setanimationlistener(this); } }

move.xml 

<set xmlns:android="http://schemas.android.com/apk/res/android" android:ordering="together"> <objectanimator     android:propertyname="x"     android:duration="500"     android:valueto="400"     android:valuetype="inttype"/> <objectanimator     android:propertyname="y"     android:duration="500"     android:valueto="300"     android:valuetype="inttype"/> </set>

any appreciated.

animationutils:createanimationfromxml

line 112 - 125 android have not support "objectanimator"

maybe need animatorinflater.loadanimator


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