SwipeToRefreshLayout.java 文件源码

@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
    int targetTop;
    int endTarget;
    switch (mType) {
        case BOTTOM:
            endTarget = getMeasuredHeight() - (int) (mSpinnerFinalOffset);
            break;
        case TOP:
        default:
            endTarget = (int) (mSpinnerFinalOffset - Math.abs(mOriginalOffsetTop));
            break;
    }
    targetTop = (mFrom + (int) ((endTarget - mFrom) * interpolatedTime));
    int offset = targetTop - mLoadingView.getTop();
    setTargetOffsetTopAndBottom(offset, false);
}