[1.0.0-rc2] - September 3, 2020

  • This release requires Kotlin 1.4.0 or above.
  • All the changes present in 0.13.0.
  • Depend on the base Kotlin stdlib instead of stdlib-jdk8.

[0.13.0] - September 3, 2020

  • Important: Launch the Interceptor chain on the main thread by default. (#513)
    • This largely restores the behaviour from 0.11.0 and below where the memory cache would be checked synchronously on the main thread.
    • To revert to using the same behaviour as 0.12.0 where the memory cache is checked on ImageRequest.dispatcher, set ImageLoader.Builder.launchInterceptorChainOnMainThread(false).
    • See launchInterceptorChainOnMainThread for more information.

  • Fix: Fix potential memory leak if request is started on a ViewTarget in a detached fragment. (#518)
  • Fix: Use ImageRequest.context to load resource URIs. (#517)
  • Fix: Fix race condition that could cause subsequent requests to not be saved to the disk cache. (#510)
  • Fix: Use blockCountLong and blockSizeLong on API 18.

  • Make ImageLoaderFactory a fun interface.
  • Add ImageLoader.Builder.addLastModifiedToFileCacheKey which allows you to enable/disable adding the last modified timestamp to the memory cache key for an image loaded from a File.

  • Update Kotlin to 1.4.0.
  • Update Coroutines to 1.3.9.
  • Update Okio to 2.8.0.

[1.0.0-rc1] - August 18, 2020

  • This release requires Kotlin 1.4.0 or above.
  • Update Kotlin to 1.4.0 and enable -Xjvm-default=all.
    • See here for how to enable -Xjvm-default=all in your build file.
    • This generates Java 8 default methods for default Kotlin interface methods.
  • Remove all existing deprecated methods in 0.12.0.
  • Update Coroutines to 1.3.9.

[0.12.0] - August 18, 2020

  • Breaking: LoadRequest and GetRequest have been replaced with ImageRequest:
    • ImageLoader.execute(LoadRequest) -> ImageLoader.enqueue(ImageRequest)
    • ImageLoader.execute(GetRequest) -> ImageLoader.execute(ImageRequest)
    • ImageRequest implements equals/hashCode.
  • Breaking: A number of classes were renamed and/or changed package:
    • coil.request.RequestResult -> coil.request.ImageResult
    • coil.request.RequestDisposable -> coil.request.Disposable
    • coil.bitmappool.BitmapPool -> coil.bitmap.BitmapPool
    • coil.DefaultRequestOptions -> coil.request.DefaultRequestOptions
  • Breaking: SparseIntArraySet has been removed from the public API.
  • Breaking: TransitionTarget no longer implements ViewTarget.
  • Breaking: ImageRequest.Listener.onSuccess's signature has changed to return an ImageResult.Metadata instead of just a DataSource.
  • Breaking: Remove support for LoadRequest.aliasKeys. This API is better handled with direct read/write access to the memory cache.

  • Important: Values in the memory cache are no longer resolved synchronously (if called from the main thread).
    • This change was also necessary to support executing Interceptors on a background dispatcher.
    • This change also moves more work off the main thread, improving performance.
  • Important: Mappers are now executed on a background dispatcher. As a side effect, automatic bitmap sampling is no longer automatically supported. To achieve the same effect, use the MemoryCache.Key of a previous request as the placeholderMemoryCacheKey of the subsequent request. See here for an example.
    • The placeholderMemoryCacheKey API offers more freedom as you can "link" two image requests with different data (e.g. different URLs for small/large images).
  • Important: Coil's ImageView extension functions have been moved from the coil.api package to the coil package.
    • Use find + replace to refactor import coil.api.load -> import coil.load. Unfortunately, it's not possible to use Kotlin's ReplaceWith functionality to replace imports.
  • Important: Use standard crossfade if drawables are not the same image.
  • Important: Prefer immutable bitmaps on API 24+.
  • Important: MeasuredMapper has been deprecated in favour of the new Interceptor interface. See here for an example of how to convert a MeasuredMapper into an Interceptor.
    • Interceptor is a much less restrictive API that allows for a wider range of custom logic.
  • Important: is now not null. If you create an ImageRequest without setting its data it will return NullRequestData as its data.

  • New: Add support for direct read/write access to an ImageLoader's MemoryCache. See the docs for more information.
  • New: Add support for Interceptors. See the docs for more information. Coil's Interceptor design is heavily inspired by OkHttp's!
  • New: Add the ability to enable/disable bitmap pooling using ImageLoader.Builder.bitmapPoolingEnabled.
    • Bitmap pooling is most effective on API 23 and below, but may still be benificial on API 24 and up (by eagerly calling Bitmap.recycle).
  • New: Support thread interruption while decoding.

  • Fix parsing multiple segments in content-type header.
  • Rework bitmap reference counting to be more robust.
  • Fix WebP decoding on API < 19 devices.
  • Expose FetchResult and DecodeResult in the EventListener API.

  • Compile with SDK 30.
  • Update Coroutines to 1.3.8.
  • Update OkHttp to 3.12.12.
  • Update Okio to 2.7.0.
  • Update AndroidX dependencies:
    • androidx.appcompat:appcompat-resources -> 1.2.0
    • androidx.core:core-ktx -> 1.3.1

[0.11.0] - May 14, 2020

  • Breaking: This version removes all existing deprecated functions.
    • This enables removing Coil's ContentProvider so it doesn't run any code at app startup.
  • Breaking: Convert SparseIntArraySet.size to a val. (#380)
  • Breaking: Move Parameters.count() to an extension function. (#403)
  • Breaking: Make BitmapPool.maxSize an Int. (#404)

  • Important: Make ImageLoader.shutdown() optional (similar to OkHttpClient). (#385)

  • Fix: Fix AGP 4.1 compatibility. (#386)
  • Fix: Fix measuring GONE views. (#397)

  • Reduce the default memory cache size to 20%. (#390)
    • To restore the existing behaviour set ImageLoaderBuilder.availableMemoryPercentage(0.25) when creating your ImageLoader.
  • Update Coroutines to 1.3.6.
  • Update OkHttp to 3.12.11.

[0.10.1] - April 26, 2020

  • Fix OOM when decoding large PNGs on API 23 and below. (#372).
    • This disables decoding EXIF orientation for PNG files. PNG EXIF orientation is very rarely used and reading PNG EXIF data (even if it's empty) requires buffering the entire file into memory, which is bad for performance.
  • Minor Java compatibility improvements to SparseIntArraySet.

  • Update Okio to 2.6.0.

[0.10.0] - April 20, 2020


  • This version deprecates most of the DSL API in favour of using the builders directly. Here's what the change looks like:

    // 0.9.5 (old)
    val imageLoader = ImageLoader(context) {
    val disposable = imageLoader.load(context, "") {
    val drawable = imageLoader.get("") {
        size(512, 512)
    // 0.10.0 (new)
    val imageLoader = ImageLoader.Builder(context)
    val request = LoadRequest.Builder(context)
    val disposable = imageLoader.execute(request)
    val request = GetRequest.Builder(context)
        .size(512, 512)
    val drawable = imageLoader.execute(request).drawable
    • If you're using the io.coil-kt:coil artifact, you can call Coil.execute(request) to execute the request with the singleton ImageLoader.
  • ImageLoaders now have a weak reference memory cache that tracks weak references to images once they're evicted from the strong reference memory cache.

    • This means an image will always be returned from an ImageLoader's memory cache if there's still a strong reference to it.
    • Generally, this should make the memory cache much more predictable and increase its hit rate.
    • This behaviour can be enabled/disabled with ImageLoaderBuilder.trackWeakReferences.
  • Add a new artifact, io.coil-kt:coil-video, to decode specific frames from a video file. Read more here.

  • Add a new EventListener API for tracking metrics.

  • Add ImageLoaderFactory which can be implemented by your Application to simplify singleton initialization.

Full Release Notes

  • Important: Deprecate DSL syntax in favour of builder syntax. (#267)
  • Important: Deprecate Coil and ImageLoader extension functions. (#322)
  • Breaking: Return sealed RequestResult type from ImageLoader.execute(GetRequest). (#349)
  • Breaking: Rename ExperimentalCoil to ExperimentalCoilApi. Migrate from @Experimental to @RequiresOptIn. (#306)
  • Breaking: Replace CoilLogger with Logger interface. (#316)
  • Breaking: Rename destWidth/destHeight to dstWidth/dstHeight. (#275)
  • Breaking: Re-arrange MovieDrawable's constructor params. (#272)
  • Breaking: Request.Listener's methods now receive the full Request object instead of just its data.
  • Breaking: GetRequestBuilder now requires a Context in its constructor.
  • Breaking: Several properties on Request are now nullable.
  • Behaviour change: Include parameter values in the cache key by default. (#319)
  • Behaviour change: Slightly adjust Request.Listener.onStart() timing to be called immediately after Target.onStart(). (#348)

  • New: Add WeakMemoryCache implementation. (#295)
  • New: Add coil-video to support decoding video frames. (#122)
  • New: Introduce EventListener. (#314)
  • New: Introduce ImageLoaderFactory. (#311)
  • New: Support animated HEIF image sequences on Android 11. (#297)
  • New: Improve Java compatibility. (#262)
  • New: Support setting a default CachePolicy. (#307)
  • New: Support setting a default Bitmap.Config. (#342)
  • New: Add ImageLoader.invalidate(key) to clear a single memory cache item (#55)
  • New: Add debug logs to explain why a cached image is not reused. (#346)
  • New: Support error and fallback drawables for get requests.

  • Fix: Fix memory cache miss when Transformation reduces input bitmap's size. (#357)
  • Fix: Ensure radius is below RenderScript max in BlurTransformation. (#291)
  • Fix: Fix decoding high colour depth images. (#358)
  • Fix: Disable ImageDecoderDecoder crash work-around on Android 11 and above. (#298)
  • Fix: Fix failing to read EXIF data on pre-API 23. (#331)
  • Fix: Fix incompatibility with Android R SDK. (#337)
  • Fix: Only enable inexact size if ImageView has a matching SizeResolver. (#344)
  • Fix: Allow cached images to be at most one pixel off requested size. (#360)
  • Fix: Skip crossfade transition if view is not visible. (#361)

  • Deprecate CoilContentProvider. (#293)
  • Annotate several ImageLoader methods with @MainThread.
  • Avoid creating a LifecycleCoroutineDispatcher if the lifecycle is currently started. (#356)
  • Use full package name for OriginalSize.toString().
  • Preallocate when decoding software bitmap. (#354)

  • Update Kotlin to 1.3.72.
  • Update Coroutines to 1.3.5.
  • Update OkHttp to 3.12.10.
  • Update Okio to 2.5.0.
  • Update AndroidX dependencies:
    • androidx.exifinterface:exifinterface -> 1.2.0

[0.9.5] - February 6, 2020

  • Fix: Ensure a view is attached before checking if it is hardware accelerated. This fixes a case where requesting a hardware bitmap could miss the memory cache.

  • Update AndroidX dependencies:
    • androidx.core:core-ktx -> 1.2.0

[0.9.4] - February 3, 2020

  • Fix: Respect aspect ratio when downsampling in ImageDecoderDecoder. Thanks @zhanghai.

  • Previously bitmaps would be returned from the memory cache as long as their config was greater than or equal to the config specified in the request. For example, if you requested an ARGB_8888 bitmap, it would be possible to have a RGBA_F16 bitmap returned to you from the memory cache. Now, the cached config and the requested config must be equal.
  • Make scale and durationMillis public in CrossfadeDrawable and CrossfadeTransition.

[0.9.3] - February 1, 2020

  • Fix: Translate child drawable inside ScaleDrawable to ensure it is centered.
  • Fix: Fix case where GIFs and SVGs would not fill bounds completely.

  • Defer calling HttpUrl.get() to background thread.
  • Improve BitmapFactory null bitmap error message.
  • Add 3 devices to hardware bitmap blacklist. (#264)

  • Update AndroidX dependencies:
    • androidx.lifecycle:lifecycle-common-java8 -> 2.2.0

[0.9.2] - January 19, 2020

  • Fix: Fix decoding GIFs on pre-API 19. Thanks @mario.
  • Fix: Fix rasterized vector drawables not being marked as sampled.
  • Fix: Throw exception if Movie dimensions are <= 0.
  • Fix: Fix CrossfadeTransition not being resumed for a memory cache event.
  • Fix: Prevent returning hardware bitmaps to all target methods if disallowed.
  • Fix: Fix MovieDrawable not positioning itself in the center of its bounds.

  • Remove automatic scaling from CrossfadeDrawable.
  • Make BitmapPool.trimMemory public.
  • Wrap AnimatedImageDrawable in a ScaleDrawable to ensure it fills its bounds.
  • Add @JvmOverloads to RequestBuilder.setParameter.
  • Set an SVG's view box to its size if the view box is not set.
  • Pass state and level changes to CrossfadeDrawable children.

  • Update OkHttp to 3.12.8.

[0.9.1] - December 30, 2019

  • Fix: Fix crash when calling LoadRequestBuilder.crossfade(false).

[0.9.0] - December 30, 2019

  • Breaking: Transformation.transform now includes a Size parameter. This is to support transformations that change the size of the output Bitmap based on the size of the Target. Requests with transformations are now also exempt from image sampling.
  • Breaking: Transformations are now applied to any type of Drawable. Before, Transformations would be skipped if the input Drawable was not a BitmapDrawable. Now, Drawables are rendered to a Bitmap before applying the Transformations.
  • Breaking: Passing null data to ImageLoader.load is now treated as an error and calls Target.onError and Request.Listener.onError with a NullRequestDataException. This change was made to support setting a fallback drawable if data is null. Previously the request was silently ignored.
  • Breaking: RequestDisposable.isDisposed is now a val.

  • New: Support for custom transitions. See here for more info. Transitions are marked as experimental as the API is incubating.
  • New: Add RequestDisposable.await to support suspending while a LoadRequest is in progress.
  • New: Support setting a fallback drawable when request data is null.
  • New: Add Precision. This makes the size of the output Drawable exact while enabling scaling optimizations for targets that support scaling (e.g. ImageViewTarget). See its documentation for more information.
  • New: Add RequestBuilder.aliasKeys to support matching multiple cache keys.

  • Fix: Make RequestDisposable thread safe.
  • Fix: RoundedCornersTransformation now crops to the size of the target then rounds the corners.
  • Fix: CircleCropTransformation now crops from the center.
  • Fix: Add several devices to the hardware bitmap blacklist.
  • Fix: Preserve aspect ratio when converting a Drawable to a Bitmap.
  • Fix: Fix possible memory cache miss with Scale.FIT.
  • Fix: Ensure Parameters iteration order is deterministic.
  • Fix: Defensive copy when creating Parameters and ComponentRegistry.
  • Fix: Ensure RealBitmapPool's maxSize >= 0.
  • Fix: Show the start drawable if CrossfadeDrawable is not animating or done.
  • Fix: Adjust CrossfadeDrawable to account for children with undefined intrinsic size.
  • Fix: Fix MovieDrawable not scaling properly.

  • Update Kotlin to 1.3.61.
  • Update Kotlin Coroutines to 1.3.3.
  • Update Okio to 2.4.3.
  • Update AndroidX dependencies:
    • androidx.exifinterface:exifinterface -> 1.1.0

[0.8.0] - October 22, 2019

  • Breaking: SvgDrawable has been removed. Instead, SVGs are now prerendered to BitmapDrawables by SvgDecoder. This makes SVGs significantly less expensive to render on the main thread. Also SvgDecoder now requires a Context in its constructor.
  • Breaking: SparseIntArraySet extension functions have moved to the coil.extension package.

  • New: Support setting per-request network headers. See here for more info.
  • New: Add new Parameters API to support passing custom data through the image pipeline.
  • New: Support individual corner radii in RoundedCornersTransformation. Thanks @khatv911.
  • New: Add ImageView.clear() to support proactively freeing resources.
  • New: Support loading resources from other packages.
  • New: Add subtractPadding attribute to ViewSizeResolver to enable/disable subtracting a view's padding when measuring.
  • New: Improve HttpUrlFetcher MIME type detection.
  • New: Add Animatable2Compat support to MovieDrawable and CrossfadeDrawable.
  • New: Add RequestBuilder<*>.repeatCount to set the repeat count for a GIF.
  • New: Add BitmapPool creation to the public API.
  • New: Annotate Request.Listener methods with @MainThread.

  • Fix: Make CoilContentProvider visible for testing.
  • Fix: Include night mode in the resource cache key.
  • Fix: Work around ImageDecoder native crash by temporarily writing the source to disk.
  • Fix: Correctly handle contact display photo uris.
  • Fix: Pass tint to CrossfadeDrawable's children.
  • Fix: Fix several instances of not closing sources.
  • Fix: Add a blacklist of devices with broken/incomplete hardware bitmap implementations.

  • Compile against SDK 29.
  • Update Kotlin Coroutines to 1.3.2.
  • Update OkHttp to 3.12.6.
  • Update Okio to 2.4.1.
  • Change appcompat-resources from compileOnly to implementation for coil-base.

[0.7.0] - September 8, 2019

  • Breaking: ImageLoaderBuilder.okHttpClient(OkHttpClient.Builder.() -> Unit) is now ImageLoaderBuilder.okHttpClient(() -> OkHttpClient). The initializer is also now called lazily on a background thread. If you set a custom OkHttpClient you must set OkHttpClient.cache to enable disk caching. If you don't set a custom OkHttpClient, Coil will create the default OkHttpClient which has disk caching enabled. The default Coil cache can be created using CoilUtils.createDefaultCache(context). e.g.:
val imageLoader = ImageLoader(context) {
    okHttpClient {
  • Breaking: Fetcher.key no longer has a default implementation.
  • Breaking: Previously, only the first applicable Mapper would be called. Now, all applicable Mappers will be called. No API changes.
  • Breaking: Minor named parameter renaming: url -> uri, factory -> initializer.

  • New: coil-svg artifact, which has an SvgDecoder that supports automatically decoding SVGs. Powered by AndroidSVG. Thanks @rharter.
  • New: load(String) and get(String) now accept any of the supported Uri schemes. e.g. You can now do imageView.load("file:///path/to/file.jpg").
  • New: Refactor ImageLoader to use Call.Factory instead of OkHttpClient. This allows lazy initialization of the networking resources using ImageLoaderBuilder.okHttpClient { OkHttpClient() }. Thanks @ZacSweers.
  • New: RequestBuilder.decoder to explicitly set the decoder for a request.
  • New: ImageLoaderBuilder.allowHardware to enable/disable hardware bitmaps by default for an ImageLoader.
  • New: Support software rendering in ImageDecoderDecoder.

  • Fix: Multiple bugs with loading vector drawables.
  • Fix: Support WRAP_CONTENT View dimensions.
  • Fix: Support parsing EXIF data longer than 8192 bytes.
  • Fix: Don't stretch drawables with different aspect ratios when crossfading.
  • Fix: Guard against network observer failing to register due to exception.
  • Fix: Fix divide by zero error in MovieDrawable. Thanks @R12rus.
  • Fix: Support nested Android asset files. Thanks @JaCzekanski.
  • Fix: Guard against running out of file descriptors on Android O and O_MR1.
  • Fix: Don't crash when disabling memory cache. Thanks @hansenji.
  • Fix: Ensure Target.cancel is always called from the main thread.

  • Update Kotlin to 1.3.50.
  • Update Kotlin Coroutines to 1.3.0.
  • Update OkHttp to 3.12.4.
  • Update Okio to 2.4.0.
  • Update AndroidX dependencies to the latest stable versions:
    • androidx.appcompat:appcompat -> 1.1.0
    • androidx.core:core-ktx -> 1.1.0
    • androidx.lifecycle:lifecycle-common-java8 -> 2.1.0
  • Replace appcompat with appcompat-resources as an optional compileOnly dependency. appcompat-resources is a much smaller artifact.

[0.6.1] - August 16, 2019

  • New: Add transformations(List<Transformation>) to RequestBuilder.
  • Fix: Add the last modified date to the cache key for file uris.
  • Fix: Ensure View dimensions are evaluated to at least 1px.
  • Fix: Clear MovieDrawable's canvas between frames.
  • Fix: Open assets correctly.

[0.6.0] - August 12, 2019

  • Initial release.