flutter_photo_library #

A Flutter plugin that exposes native photo-library APIs without UI.
Fetch albums, paginate images/videos, generate thumbnails, and resolve original files on Android and iOS — then build your own gallery UI.

Main highlight — fast media loading #

Designed for smooth gallery scrolling: paginated native fetches, thumbnail LRU caching, and lazy original loading so the UI stays responsive — no lag on scroll, no device hang, and faster media loading even with large libraries.


Platforms	Android (minSdk 24), iOS (13.0+)
Dart	`>=2.12.0 <4.0.0`
Flutter	`>=2.0.0`
Version	`0.0.1`
License	MIT

Demo #

Smooth gallery loading and browsing — fast media load with no lag or device hang:

flutter_photo_library demo — fast media loading

Features #

Feature	Description
Fast media loading	Main feature — paginated native queries + cached thumbnails for lag-free grids; no UI freeze or device hang on large libraries
Smooth scrolling	Loads pages and thumbs on demand so scrolling stays fluid
Local media fetch	Images and videos from device storage
Albums / folders	List non-empty albums; filter pages by `albumId`
Pagination	Page index starts at `0`; each page returns up to `50` items by default
Thumbnails	Native generation + Dart LRU cache (max 400 entries)
Original access	Raw image bytes or video file URI via `getOriginalFile`
Media URL	Lazy local path/URI via `getMediaUrl`
Permissions	`granted` / `denied` / `permanentlyDenied`
No bundled UI	Data APIs only — you own the widgets

Install #

dependencies:
  flutter_photo_library: ^0.0.1

flutter pub add flutter_photo_library

import 'package:flutter_photo_library/flutter_photo_library.dart';

Configure native platforms #

Android #

The plugin merges these permissions into your app automatically:

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
<uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />

Runtime requests by API level:

API	Permissions requested
34+	`READ_MEDIA_IMAGES`, `READ_MEDIA_VIDEO`, `READ_MEDIA_VISUAL_USER_SELECTED` (limited access)
33	`READ_MEDIA_IMAGES`, `READ_MEDIA_VIDEO`
≤ 32	`READ_EXTERNAL_STORAGE`

To drop a permission you do not need (e.g. videos only / images only), remove it in your app AndroidManifest.xml:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

  <uses-permission
      android:name="android.permission.READ_MEDIA_VIDEO"
      tools:node="remove" />
</manifest>

Use compileSdk 34+.

iOS #

Add to ios/Runner/Info.plist (required — missing this crashes on permission request):

<key>NSPhotoLibraryUsageDescription</key>
<string>We need access to your photo library to display your images and videos.</string>

On iOS 14+, both full (.authorized) and limited (.limited) access count as granted.

Quick start #

import 'package:flutter_photo_library/flutter_photo_library.dart';

Future<void> loadGallery() async {
  final status = await FlutterPhotoLibrary.requestPermissions();
  if (status != PhotoLibraryPermissionStatus.granted) return;

  final repo = FlutterPhotoLibraryRepository();

  final albums = await repo.getAlbums(type: MediaFetchType.all);

  final items = await repo.fetchMediaPage(
    page: 0,
    pageSize: 50,
    fetchType: MediaFetchType.all,
    albumId: albums.isNotEmpty ? albums.first.id : null,
  );

  final thumb = await repo.getThumbnail(
    id: items.first.id,
    type: items.first.type,
    width: 200,
    height: 200,
  );
}

Usage #

1. Permissions #

Most APIs require access. Prefer checking first, then requesting if needed.

final bool alreadyGranted = await FlutterPhotoLibrary.checkPermissions();

if (!alreadyGranted) {
  final status = await FlutterPhotoLibrary.requestPermissions();

  switch (status) {
    case PhotoLibraryPermissionStatus.granted:
      break;
    case PhotoLibraryPermissionStatus.permanentlyDenied:
      // Open app Settings so the user can enable access.
      break;
    case PhotoLibraryPermissionStatus.denied:
      // Denied for now; you can ask again later.
      break;
  }
}

2. Albums (`MediaAlbum`) #

final repository = FlutterPhotoLibraryRepository(); // singleton

final List<MediaAlbum> albums = await repository.getAlbums(
  type: MediaFetchType.all, // .all | .image | .gif
);
// MediaAlbum → id, name, count

3. Paginated media (`MediaItem`) #

final List<MediaItem> items = await repository.fetchMediaPage(
  page: 0,                              // 0-indexed
  pageSize: FlutterPhotoLibraryRepository.defaultPageSize, // 50
  fetchType: MediaFetchType.all,
  albumId: selectedAlbum?.id,           // null = all media
);

Field	Notes
`id`	Native asset id (use with other APIs)
`uri`	Android: `content://…` · iOS: asset local identifier
`type`	`MediaFetchType.image` or `.video`
`duration`	Milliseconds (`0` for images)
`width` / `height`	Pixel size
`dateAdded`	`DateTime`
`originalMediaUri`	Android: filesystem path from MediaStore when available. iOS: usually `null` — use `getMediaUrl` / `getOriginalFile`
`formattedDuration`	`m:ss` helper for videos

4. Thumbnails #

Returns JPEG Uint8List? for Image.memory. Checks the in-memory LRU cache first, then native.

final Uint8List? bytes = await repository.getThumbnail(
  id: item.id,
  type: item.type, // default: MediaFetchType.image
  width: 200,      // physical px (default 200)
  height: 200,     // physical px (default 200)
);

Tips:

Request physical pixels (logicalSize * devicePixelRatio) for sharp grids.
Cache key is id + width × height; different sizes are separate cache entries.

5. Media URL #

Resolve a local path/URI when you need a file location (especially on iOS, or when originalMediaUri is null):

final String? url = await repository.getMediaUrl(
  id: item.id,
  type: item.type,
);

Android: typically a content:// URI
iOS: file URL; may download iCloud assets (networkAccessAllowed)

6. Original file #

Prefer URIs for display/playback when possible. Use this when you need image bytes or a dedicated video URL:

final MediaFile? file = await repository.getOriginalFile(
  id: item.id,
  type: item.type,
);

if (file?.isImage == true) {
  // file!.bytes → Uint8List (can be large)
} else if (file?.isVideo == true) {
  // file!.videoUrl → local / content URI string
}

7. Clear Dart thumbnail cache #

repository.clearCache();

Useful on leave/refresh of a large gallery.

API reference #