如何通过线圈Uri将位图加载到可组合的Glance中？

Question

我遵循ImageGlanceWidget的示例代码，通过Uri将位图加载到Glance。

正如来自这个答案的注释中提到的，我已经用下面的代码替换了getImageProvider()方法。但是，当我这样做时，我会得到错误：Error in Glance App Widget java.io.FileNotFoundException: No content provider:/data/user/0/com.example.myappname/cache/image_cache/56448.....8e0ad2fac0.1。

如何从线圈磁盘缓存中提取位图？

private fun getImageProvider(context: Context, coilPath: String): ImageProvider {
    val bitmap = MediaStore.Images.Media.getBitmap(context.contentResolver, coilPath.toUri())
    return ImageProvider(bitmap)
}

参数值

val coilPath = context.imageLoader.diskCache?.get("https://picsum.photos/${width.roundToInt()}/${height.roundToInt()}")?.data?.toFile()?.path!! /*uses worker context*/
val context = LocalContext.current /*pass in context from glance composable to getImageProvider*/

全堆栈跟踪

E/GlanceAppWidget: Error in Glance App Widget
    java.io.FileNotFoundException: No content provider: /data/user/0/com.example.mpappname/cache/image_cache/56448c7214ea904b18f01d34bdd997afd53c1c976abda4a67546d08e0ad2fac0.1
        at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:2013)
        at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1842)
        at android.content.ContentResolver.openInputStream(ContentResolver.java:1518)
        at android.provider.MediaStore$Images$Media.getBitmap(MediaStore.java:2322)
        at com.example.stockwidgetv1.clean.widget.glance.utility.WidgetDummy.getImageProvider2(WidgetDummy.kt:145)
        at com.example.stockwidgetv1.clean.widget.glance.utility.WidgetDummy.access$getImageProvider2(WidgetDummy.kt:44)
        at com.example.stockwidgetv1.clean.widget.glance.utility.WidgetDummy$Content$1.invoke(WidgetDummy.kt:101)
        at com.example.stockwidgetv1.clean.widget.glance.utility.WidgetDummy$Content$1.invoke(WidgetDummy.kt:97)
        at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:107)
        at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:34)
        at androidx.glance.layout.BoxKt.Box(Box.kt:74)
        at com.example.stockwidgetv1.clean.widget.glance.utility.WidgetDummy.Content(WidgetDummy.kt:92)
        at androidx.glance.appwidget.GlanceAppWidget$setContent$1$1.invoke(GlanceAppWidget.kt:404)
        at androidx.glance.appwidget.GlanceAppWidget$setContent$1$1.invoke(GlanceAppWidget.kt:404)
        at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:107)
        at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:34)
        at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:228)
        at androidx.glance.appwidget.GlanceAppWidget$setContent$1.invoke(GlanceAppWidget.kt:398)
        at androidx.glance.appwidget.GlanceAppWidget$setContent$1.invoke(GlanceAppWidget.kt:397)
        at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:107)
        at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:34)
        at androidx.compose.runtime.ActualJvm_jvmKt.invokeComposable(ActualJvm.jvm.kt:78)
        at androidx.compose.runtime.ComposerImpl$doCompose$2$5.invoke(Composer.kt:3248)
        at androidx.compose.runtime.ComposerImpl$doCompose$2$5.invoke(Composer.kt:3238)
        at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:341)
        at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source:1)
        at androidx.compose.runtime.ComposerImpl.doCompose(Composer.kt:3238)
        at androidx.compose.runtime.ComposerImpl.composeContent$runtime_release(Composer.kt:3173)
        at androidx.compose.runtime.CompositionImpl.composeContent(Composition.kt:587)
        at androidx.compose.runtime.Recomposer.composeInitial$runtime_release(Recomposer.kt:950)
        at androidx.compose.runtime.CompositionImpl.setContent(Composition.kt:519)
        at androidx.glance.appwidget.GlanceAppWidget.setContent-Cox8Y-g(GlanceAppWidget.kt:397)
        at androidx.glance.appwidget.GlanceAppWidget.access$setContent-Cox8Y-g(GlanceAppWidget.kt:72)
        at androidx.glance.appwidget.GlanceAppWidget$composeForSize$2.invokeSuspend(GlanceAppWidget.kt:372)
        at androidx.glance.appwidget.GlanceAppWidget$composeForSize$2.invoke(Unknown Source:8)
        at androidx.glance.appwidget.GlanceAppWidget$composeForSize$2.invoke(Unknown Source:4)
        at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:89)
        at kotlinx.coroutines.BuildersKt__Builders_commonKt.withContext(Builders.common.kt:169)
        at kotlinx.coroutines.BuildersKt.withContext(Unknown Source:1)
        at androidx.glance.appwidget.GlanceAppWidget.composeForSize-AAqiGWc$glance_appwidget_release(GlanceAppWidget.kt:365)
        at androidx.glance.appwidget.GlanceAppWidget$Api31Impl$composeAllSizes$2$allViews$1$1.invokeSuspend(GlanceAppWidget.kt:431)
E/GlanceAppWidget:     at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:570)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:677)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:664)

Answer 1

BitmapFactory.decodeFile()从指向位图图像的File中获取Bitmap。

对只需要让线圈加载图像来说会更干净。这样，您就不会试图处理Coil的缓存(Coil也可能正在操作该缓存，例如清除条目)，并且您可以在尝试使用该缓存之前处理图像的争用状态：

val request = ImageRequest.Builder(context)
    .data("https://www.example.com/image.jpg")
    .build()
val bitmap = imageLoader.execute(request).drawable.bitmap