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StrictMode DiskReadViolation when loading image File from disk

See original GitHub issue

Describe the bug I load an image “file://” Uri from disk. Coil obviously loads it on main thread, or at least does an “last modified time” check on main thread. I even tried specifying IO dispatcher with imageView.load(fileUri) { dispatcher(Dispatchers.IO) } but it doesn’t help.

Expected behavior Expected behaviour is that disk should never be touched from main thread.

To Reproduce imageView.load(fileUri) where file Uri is a literal “file://” Uri.

Logs/Screenshots

2020-05-02 22:04:02.901 27160-27160/com.berry4u.app D/StrictMode: StrictMode policy violation; ~duration=5 ms: android.os.strictmode.DiskReadViolation
        at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1556)
        at java.io.UnixFileSystem.getLastModifiedTime(UnixFileSystem.java:289)
        at java.io.File.lastModified(File.java:939)
        at coil.fetch.FileFetcher.key(FileFetcher.kt:14)
        at coil.fetch.FileFetcher.key(FileFetcher.kt:12)
        at coil.RealImageLoader$executeInternal$2$deferred$1.invokeSuspend(RealImageLoader.kt:525)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
        at kotlinx.coroutines.EventLoop.processUnconfinedEvent(EventLoop.common.kt:69)
        at kotlinx.coroutines.DispatchedContinuationKt.resumeCancellableWith(DispatchedContinuation.kt:337)
        at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:26)
        at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:109)
        at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:158)
        at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch(Builders.common.kt:54)
        at kotlinx.coroutines.BuildersKt.launch(Unknown Source:1)
        at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch$default(Builders.common.kt:47)
        at kotlinx.coroutines.BuildersKt.launch$default(Unknown Source:1)
        at coil.RealImageLoader.execute(RealImageLoader.kt:143)

Version 0.10.1

Issue Analytics

State:
Created 3 years ago
Comments:6 (2 by maintainers)

Top GitHub Comments

2reactions

PaulWoitaschekcommented, Feb 11, 2022

@micHar

Here is an example how to deactivate it: https://github.com/PaulWoitaschek/Voice/commit/03096be8f679ef879074bae6084d3e88e4bea3fe

2reactions

colinrtwhitecommented, May 27, 2020

Coil synchronously fulfills images in the memory cache (to avoid white flashes) so it’s not possible to move the check to a background thread.

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