Wallpaper

A Flutter plugin that allows you to download an image from a URL and set it as wallpaper on Android.

The plugin supports setting wallpapers for:

• Home screen
• Lock screen
• Both screens
• System wallpaper

---

Features

• Download image from URL
• Track download progress
• Set wallpaper for home screen
• Set wallpaper for lock screen
• Set wallpaper for both screens
• Set system wallpaper
• Resize images before setting wallpaper
• Use modern opt-in fit modes for source-based wallpapers
• Read the platform-recommended wallpaper size
• Open the Android system wallpaper chooser

---

Installation

Add the plugin to your pubspec.yaml:

dependencies:
  wallpaper: ^1.2.0

Then run:

flutter pub get

---

Android Configuration

The plugin manifest already declares the permissions it needs for downloading network images and setting wallpapers:

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.SET_WALLPAPER"/>

Downloaded images are stored in app-private cache, files, or external files directories depending on DownloadLocation. Apps using the default workflow do not need READ_EXTERNAL_STORAGE or WRITE_EXTERNAL_STORAGE, and they do not need to add their own file_paths.xml.

---

Usage

Import the plugin:

import 'package:wallpaper/wallpaper.dart';

---

Recommended Wallpaper Size

Use the recommended size when choosing, generating, cropping, or downloading an image for the current Android launcher:

final size = await Wallpaper.recommendedWallpaperSize();
print('${size.width} x ${size.height}');

---

Open Wallpaper Chooser

Open Android's built-in wallpaper chooser without passing a specific image:

await Wallpaper.openWallpaperChooser();

---

Download Image

final stream = Wallpaper.imageDownloadProgress(
  imageUrl,
  location: DownloadLocation.applicationDirectory,
);

stream.listen((progress) {
  print(progress);
});

---

Typed Download Operation

Use download when you need typed progress, headers, timeouts, cache reuse, or cancellation:

final operation = Wallpaper.download(
  imageUrl,
  options: const WallpaperDownloadOptions(
    imageName: 'daily_wallpaper',
    headers: {'Authorization': 'Bearer token'},
    connectTimeout: Duration(seconds: 15),
    receiveTimeout: Duration(seconds: 30),
    cachePolicy: WallpaperCachePolicy.reuse,
  ),
);

operation.progress.listen((progress) {
  print(progress.percentage);
});

final file = await operation.completed;

await Wallpaper.homeScreen(
  imageName: file.imageName,
  fileExtension: file.fileExtension,
  location: file.location,
);

Cancel an active operation:

await operation.cancel();

Clear plugin-managed temporary downloads created by the typed download API:

await Wallpaper.clearCache();

---

Set Home Screen Wallpaper

await Wallpaper.homeScreen(
  width: width,
  height: height,
  options: RequestSizeOptions.resizeFit,
  location: DownloadLocation.applicationDirectory,
);

---

Set Lock Screen Wallpaper

await Wallpaper.lockScreen(
  location: DownloadLocation.applicationDirectory,
);

---

Set Both Wallpapers

await Wallpaper.bothScreen(
  location: DownloadLocation.applicationDirectory,
);

---

Set System Wallpaper

await Wallpaper.systemScreen(
  location: DownloadLocation.applicationDirectory,
);

---

Set Wallpaper From a Local File

await Wallpaper.setFromFile(
  file.path,
  target: WallpaperTarget.home,
  options: RequestSizeOptions.resizeFit,
  fit: WallpaperFit.cover,
  alignment: WallpaperAlignment.topCenter,
);

alignment is optional and defaults to center. It applies to WallpaperFit.cover cropping and WallpaperFit.center placement.

---

Set Wallpaper From Bytes

await Wallpaper.setFromBytes(
  imageBytes,
  target: WallpaperTarget.both,
  fileExtension: ImageFormat.png,
);

---

Set Wallpaper From an Asset

await Wallpaper.setFromAsset(
  'assets/wallpaper.jpg',
  target: WallpaperTarget.lock,
);

For assets bundled by another package:

await Wallpaper.setFromAsset(
  'assets/wallpaper.jpg',
  package: 'wallpaper_assets',
);

---

Unified Source API

Use setWallpaperFromSource when you prefer a typed result instead of catching PlatformException from the legacy methods:

final result = await Wallpaper.setWallpaperFromSource(
  source: WallpaperSource.file(file.path),
  options: const WallpaperOptions(
    target: WallpaperTarget.home,
    fit: WallpaperFit.cover,
    alignment: WallpaperAlignment.topCenter,
  ),
);

switch (result) {
  case WallpaperSuccess(:final message):
    print(message);
  case WallpaperFailure(:final exception):
    print('${exception.code}: ${exception.message}');
}

---

Example

final stream = Wallpaper.imageDownloadProgress(imageUrl);

stream.listen((progress) {
  print("Downloading: $progress");
}, onDone: () async {

  await Wallpaper.homeScreen(
    width: 1080,
    height: 1920,
    options: RequestSizeOptions.resizeFit,
  );

});

---

Supported Platform

Platform	Supported
Android	✅
iOS	❌

---

Notes

• Internet connection is required to download images.
• Lock screen wallpaper requires Android 7.0+ (API 24).
• Behavior may vary depending on device manufacturer.
• Starting multiple downloads with the same imageName writes to the same file. Use unique names for concurrent downloads.

---

License

MIT License