HorizontalScrollView实现先左滑动后右滑动动画

 @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
 HorizontalScrollView hsTabs = (HorizontalScrollView ) findViewById(R.id.hsTabs);
 
 new Handler().postDelayed(new Runnable() {
 
             @Override
             public void run() {
 
                 ObjectAnimator oa = ObjectAnimator.ofInt(hsTabs, "scrollX", 0, 150);
                 oa.setDuration(500);
 
                 final ObjectAnimator oa2 = ObjectAnimator
                         .ofInt(hsTabs, "scrollX", 150, 0);
                 oa2.setDuration(500);
 
                 oa.addListener(new AnimatorListener() {
 
                     @Override
                     public void onAnimationStart(Animator arg0) {
 
                     }
 
                     @Override
                     public void onAnimationRepeat(Animator arg0) {
 
                     }
 
                     @Override
                     public void onAnimationEnd(Animator arg0) {
                         oa2.start();
 
                     }
 
                     @Override
                     public void onAnimationCancel(Animator arg0) {
 
                     }
                 });
 
                 oa.start();
 
             }
         }, 1000);
 }