All 7 Camera & Media Handling in Flutter questions
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What strategies help manage memory usage effectively when a Flutter app needs to display many images at once, such as within a large scrolling photo gallery?

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Answer

Displaying a very large number of images simultaneously, such as within a scrolling gallery containing thousands of photos, can quickly exhaust available memory if every single image is fully decoded and held in memory at full resolution at the same time, and effective strategies include using a lazy loading list widget like ListView.builder that only builds the specific items currently visible on screen, specifying appropriate cacheWidth and cacheHeight values on the Image widget to avoid unnecessarily decoding images at a far higher resolution than what will actually be displayed, and properly disposing of any camera controllers or video controllers once they are no longer actually needed.
Image.network(
  imageUrl,
  cacheWidth: 300,
  cacheHeight: 300,
)
Real-world example A photo gallery app specifies a reduced cacheWidth and cacheHeight matching the actual thumbnail display size for every image in its grid view, dramatically reducing memory usage compared to decoding every single full resolution original image just to display a small thumbnail.

Common follow-ups: What is the difference between an image's actual file size and its decoded in memory size?;How do you properly dispose of a CameraController or VideoPlayerController to avoid a memory leak?

Flutter Performance Optimization;Flutter Isolates & Multithreading
All 7 Camera & Media Handling in Flutter questions