安卓ViewPager:仅当前一项滚动到90%时才滚动到下一项

public class CustomViewPager extends ViewPager {
    private static final float SCROLL_THRESHOLD = 0.9f; // 滚动阈值，即滚动到90%时开始滚动到下一项

    public CustomViewPager(Context context) {
        super(context);
    }

    public CustomViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return super.onTouchEvent(event);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        return super.onInterceptTouchEvent(event);
    }

    @Override
    public void setCurrentItem(int item) {
        super.setCurrentItem(item);
    }

    @Override
    public void setCurrentItem(int item, boolean smoothScroll) {
        super.setCurrentItem(item, smoothScroll);
    }

    @Override
    public void scrollTo(int x, int y) {
        super.scrollTo(x, y);
    }

    @Override
    public void scrollTo(int x, int y, int duration) {
        super.scrollTo(x, y, duration);
    }

    @Override
    public void computeScroll() {
        super.computeScroll();
    }

    @Override
    public void setOnPageChangeListener(OnPageChangeListener listener) {
        super.setOnPageChangeListener(listener);
    }

    @Override
    public void addOnPageChangeListener(OnPageChangeListener listener) {
        super.addOnPageChangeListener(listener);
    }

    @Override
    public void removeOnPageChangeListener(OnPageChangeListener listener) {
        super.removeOnPageChangeListener(listener);
    }

    @Override
    public void clearOnPageChangeListeners() {
        super.clearOnPageChangeListeners();
    }

    @Override
    public void setPageTransformer(boolean reverseDrawingOrder, PageTransformer transformer) {
        super.setPageTransformer(reverseDrawingOrder, transformer);
    }

    @Override
    public void setPageTransformer(boolean reverseDrawingOrder, PageTransformer transformer, int pageLayerType) {
        super.setPageTransformer(reverseDrawingOrder, transformer, pageLayerType);
    }

    @Override
    public void setAdapter(PagerAdapter adapter) {
        super.setAdapter(adapter);
    }

    @Override
    public PagerAdapter getAdapter() {
        return super.getAdapter();
    }

    @Override
    public void setOnAdapterChangeListener(OnAdapterChangeListener listener) {
        super.setOnAdapterChangeListener(listener);
    }

    @Override
    public int getCurrentItem() {
        return super.getCurrentItem();
    }

    @Override
    public void setOffscreenPageLimit(int limit) {
        super.setOffscreenPageLimit(limit);
    }

    @Override
    public int getOffscreenPageLimit() {
        return super.getOffscreenPageLimit();
    }

    @Override
    public void setPageMargin(int marginPixels) {
        super.setPageMargin(marginPixels);
    }

    @Override
    public int getPageMargin() {
        return super.getPageMargin();
    }

    @Override
    public void setPageMarginDrawable(Drawable d) {
        super.setPageMarginDrawable(d);
    }

    @Override
    public void setPageMarginDrawable(int resId) {
        super.setPageMarginDrawable(resId);
    }

    @Override
    public Parcelable onSaveInstanceState() {
        return super.onSaveInstanceState();
    }

    @Override
    public void onRestoreInstanceState(Parcelable state) {
        super.onRestoreInstanceState(state);
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
    }
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_MOVE) {
        int currentItem = getCurrentItem();
        int totalItemCount = getAdapter().getCount();
        float scrollOffset = (float) getScrollX() / getWidth();
        float currentItemOffset = (float) currentItem / totalItemCount;
        float nextItemOffset = (float) (currentItem + 1) / totalItemCount;

        if (scrollOffset >= currentItemOffset + (nextItemOffset - currentItemOffset) * SCROLL_THRESHOLD) {
            setCurrentItem(currentItem + 1, true);
        }
    }

    return super.onTouchEvent(event);
}

CustomViewPager viewPager = findViewById(R.id.viewPager);