public void setPtrIndicator(PtrIndicator slider) {
        if (mPtrIndicator != null && mPtrIndicator != slider) {
            slider.convertFrom(mPtrIndicator);
        }
        mPtrIndicator = slider;
    }
Not necessary any longer. Once moved, cancel event will be sent to child.

@param yes
common/src/main/java/com/sxjs/common/widget/pulltorefresh/PtrFrameLayout.java