android - Flutter GridView Overlay Issue: Filtering Section Prevents Clicks on Options - Stack Overflow

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Issue Summary

Hey all ) I am building a Flutter app that displays a list of offers in a GridView.builder. Above the grid, I have a filtering section that smoothly expands and collapses when scrolling. This filtering section contains several filter buttons that should be clickable and hoverable.

However, I am experiencing a problem:

• When the filtering section is expanded, all filtering options appear visually, but they are not clickable or hoverable.
• It seems like an invisible overlay is covering them.
• Only the first row of buttons (upper tip of the second row) can be clicked/hovered, while the rest are completely unresponsive.
• The GridView itself works fine, and the cards are positioned correctly.

App Structure

• The filtering section is placed above the offers grid.
• The filtering section's height dynamically changes based on _isFilteringHidden.
• The offers grid is wrapped in an Expanded widget inside a Column to fill available space.
• An AnimatedContainer(height: filteringHeight) is used to prevent overlap issues when collapsing the filtering section.

Code Snippet:

    AnimatedContainer(
  duration: const Duration(milliseconds: 600),
  height: filteringHeight, // Adjust height dynamically
),

Expanded(
  child: Padding(
    padding: const EdgeInsets.all(16),
    child: GridView.builder(
      controller: _scrollController, // Track scrolling
      gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
        crossAxisCount: 2,
        crossAxisSpacing: 10,
        mainAxisSpacing: 10,
        childAspectRatio: 3 / 4,
      ),
      itemCount: offerData.length,
      itemBuilder: (context, index) {
        return buildOfferCard(
          offerData[index]['image']!,
          offerData[index]['title']!,
          offerData[index]['description']!,
          offerData[index]['discount']!
        );
      },
    ),
  ),
),

What I Tried

Check Overlay Issues

I added a debugPrint statement inside my filter button onTap method, and it does not trigger unless the button is in the first row.

Increased Opacity for Debugging

I wrapped the filtering section in a red semi-transparent container and found that the expanded filtering area is being visually rendered, but something is covering the lower part.

Used IgnorePointer & AbsorbPointer for Testing

Wrapping the AnimatedContainer in an IgnorePointer confirmed that the area was intercepting taps.

Potential Cause

I suspect the issue is caused by the AnimatedContainer(height: filteringHeight), which is likely creating a transparent but interactive overlay over the filtering options. This invisible layer blocks interactions with the buttons.

Question

How can I modify my layout to prevent the filteringHeight animation from blocking interactions while still ensuring a smooth expand/collapse motion AND keeping the non-expanded section under the filtering options?

Any help would be greatly appreciated!

本文标签： androidFlutter GridView Overlay Issue Filtering Section Prevents Clicks on OptionsStack Overflow