FlexboxLayoutManager.computeScrollOffset()； It is wrong to be equal to 0

[shenliangshanghai]

• I have searched existing issues and confirmed this is not a duplicate

Issues and steps to reproduce

*Why is flexboxmanager. Computescrolloffset() equal to 0 when only half of the first line is visible；I can't judge whether recyclerView.canScrollVertically() can continue to slide

Expected behavior

• when only half of the first line is visible,should return Height of the first line invisible part
• I found that the expectation of findfirstreferenceviewinline() was different from what I thought

Version of the flexbox library

*1.1.1 - 3.0.0

Link to code

//bottomSheetBehavior.java
if (!target.canScrollVertically(-1)) {
if (newTop <= collapsedOffset || hideable) {
if (!isDraggable) {
// Prevent dragging
return
}
consumed[1] = dyUnconsumed
ViewCompat.offsetTopAndBottom(child, -dyUnconsumed)
setStateInternal(STATE_DRAGGING)
} else {
consumed[1] = currentTop - collapsedOffset
ViewCompat.offsetTopAndBottom(child, -consumed[1])
setStateInternal(STATE_COLLAPSED)
}
}

[wojiaosuxiaobai]

I have the same issue.

public static boolean isFirstViewCovered(FlexboxLayoutManager flexboxLayoutManager) {
        try {
            if (flexboxLayoutManager.findFirstVisibleItemPosition() == 0) {
                View firstView = flexboxLayoutManager.findViewByPosition(0);
                if (firstView != null) {
                    return isViewCoveredByParent(firstView);
                }
            }
        } catch (Throwable e) {
            Log.e("isFirstViewCovered", "error: " + e.getMessage());
        }

        return false;
    }

I made a compromise with this method