android - Animators may only be run on Looper threads error on ObjectAnimator -

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i having problem with

{     animatorset animset = new animatorset();     animset.start(); }

getting crash after animset.start

getting msg android.util.androidruntimeexception: animators may run on looper threads...

please me overcome issue..

try adding 

new handler().postdelayed(new runnable() {             @override             public void run() {                 runonuithread(new runnable() {                     @override                     public void run() {                         animset.start();                     }                 });             }         }, 100);

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