public ViewAnimator(Context context, AttributeSet attrs) {
    super(context, attrs);

    TypedArray a =
        context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.ViewAnimator);
    int resource = a.getResourceId(com.android.internal.R.styleable.ViewAnimator_inAnimation, 0);
    if (resource > 0) {
      setInAnimation(context, resource);
    }

    resource = a.getResourceId(com.android.internal.R.styleable.ViewAnimator_outAnimation, 0);
    if (resource > 0) {
      setOutAnimation(context, resource);
    }
    a.recycle();

    initViewAnimator(context, attrs);
  }
 public ViewAnimator(Context context) {
   super(context);
   initViewAnimator(context, null);
 }