Android – synchronizes the scroll position of the Scrollview between all clips in the viewpager

Therefore, I have an activity with a view pager. It will expand about 7 fragments. There is a Scrollview in each fragment. I want to synchronize the scrolling of all 7 scrolling views. Therefore, if the user scrolls to a position on fragment 3 and continues fragment 5, they should be in the same position. The scrolling view will expand the same child nodes. Therefore, in all 7 fragments, The total height of the Scrollview is constant

I work in a certain system, but its type is a hit or miss. I get the scroll position of a list and broadcast the position and idle fragment consumption broadcast. I also save the position on the activity so that I can request the position in the onresume of the fragment that has not been inflated. This is my Code:

@Override
public void onResume() {
    super.onResume();
    mParentScrollView.setScrollY(mParentActivity.getScrollPos());
}

@Override
public void onScrollChanged(ObservableScrollView scrollView, int x, int y, int oldX, int oldY) {
    mScrollListener.onScroll(y);
    mParentActivity.setScrollPos(y);
    if (callbackSwitch) {
        Intent intent = new Intent("ACTION_SCROLL");
        intent.putExtra("TRANSLATION", y);
        LocalBroadcastManager.getInstance(getActivity()).sendBroadcast(intent);
    }
    callbackSwitch = true; //Switch to stop recursive calls
}

private BroadcastReceiver mTranslationReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (!isVisible) {
            int translation = intent.getIntExtra("TRANSLATION", 0);
            mParentScrollView.setScrollY(translation);
            callbackSwitch = false;
        }
    }
};

I wonder if there is a better and more stable way to achieve something similar

Thank you in advance

resolvent:

I'm not sure how elegant this solution is, but it should solve the problem. Extend viewpager and override onmeasure (int, int) method

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int height = 0;
    for (int i = 0; i < getChildCount(); i++) {
        View child = getChildAt(i);
        child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
        int h = child.getMeasuredHeight();
        if (h > height) height = h;
    }
    heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

My custom viewpager is in nestedscrollview, and neither of the two sub fragments contains any other Scrollview