使用 Jetpack Glance 实现 Widget 时偶尔会遇到 IllegalStateException 异常，比如：IllegalStateException: CompositionLocal LocalConfiguration not present 或者 IllegalStateException: CompositionLocal LocalDensity not present。
Jetpack Glance 通过提供的可组合项，在我们使用时隐藏了 RemoteView，无需直接操作 RemoteView，但是最终还是会转换为 RemoteView 来渲染。
这是因为 Jetpack Glance 实现 Widget/小部件的原理是它提供了一组独立的可组合项供我们使用，其提供的组件不能与 Jetpack Compose 库互相操作，如果使用的可组合项不是来自 Jetpack Glance API 则会遇到类似 IllegalStateException: CompositionLocal * not present 异常
例如：
-
在 Jetpack Glance 实现 widget 时通过 Jetpack Compose 的 stringResource() 可组合项加载字符串资源，运行时则会抛出异常：IllegalStateException: CompositionLocal LocalConfiguration not present。
应使用 Jetpack Glance 提供的 API：*LocalContext*.current.getString() 来加载字符串资源。
-
在 Jetpack Glance 实现 widget 时通过 Jetpack Compose 的 LocalDensity 进行屏幕密度相关操作时，会抛出异常：IllegalStateException: CompositionLocal LocalDensity not present 。
目前的 Jetpack Glance 版本（）没有提供 Glance 版本的 LocalDensity。
如下是抛出两种异常代码和异常日志：
1. IllegalStateException: CompositionLocal LocalConfiguration not present
package cn.itmob.glance
class SampleGlanceAppWidget : GlanceAppWidget() {
//...
@Composable
fun Greeting() {
Text(text = stringResource(R.string.app_name))
}
}
上面代码抛出的异常日志：
WM-WorkerWrapper cn.itmob.glance E Work [ id=f5579d86-cdff-4f7c-8468-291da5542dbc, tags={ androidx.glance.session.SessionWorker } ] failed because it threw an exception/error
java.util.concurrent.ExecutionException: java.lang.IllegalStateException: CompositionLocal LocalConfiguration not present
at androidx.work.impl.utils.futures.AbstractFuture.getDoneValue(AbstractFuture.java:516)
at androidx.work.impl.utils.futures.AbstractFuture.get(AbstractFuture.java:475)
at androidx.work.impl.WorkerWrapper$2.run(WorkerWrapper.java:311)
at androidx.work.impl.utils.SerialExecutor$Task.run(SerialExecutor.java:91)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.IllegalStateException: CompositionLocal LocalConfiguration not present
at androidx.compose.ui.platform.AndroidCompositionLocals_androidKt.noLocalProvidedFor(AndroidCompositionLocals.android.kt:164)
at androidx.compose.ui.platform.AndroidCompositionLocals_androidKt.access$noLocalProvidedFor(AndroidCompositionLocals.android.kt:1)
at androidx.compose.ui.platform.AndroidCompositionLocals_androidKt$LocalConfiguration$1.invoke(AndroidCompositionLocals.android.kt:44)
at androidx.compose.ui.platform.AndroidCompositionLocals_androidKt$LocalConfiguration$1.invoke(AndroidCompositionLocals.android.kt:43)
at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
at androidx.compose.runtime.LazyValueHolder.getCurrent(ValueHolders.kt:29)
at androidx.compose.runtime.LazyValueHolder.getValue(ValueHolders.kt:31)
at androidx.compose.runtime.CompositionLocalMapKt.read(CompositionLocalMap.kt:88)
at androidx.compose.runtime.ComposerImpl.consume(Composer.kt:2049)
at androidx.compose.ui.res.Resources_androidKt.resources(Resources.android.kt:35)
at androidx.compose.ui.res.StringResources_androidKt.stringResource(StringResources.android.kt:34)
at cn.itmob.glance.SampleGlanceAppWidget$Greeting$1.invoke(SampleGlanceAppWidget.kt:45)
at cn.itmob.glance.SampleGlanceAppWidget$Greeting$1.invoke(SampleGlanceAppWidget.kt:44)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:117)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.glance.layout.ColumnKt.Column-K4GKKTE(Column.kt:97)
at cn.itmob.glance.SampleGlanceAppWidget.Greeting(SampleGlanceAppWidget.kt:42)
at cn.itmob.glance.SampleGlanceAppWidget.access$Greeting(SampleGlanceAppWidget.kt:22)
at cn.itmob.glance.SampleGlanceAppWidget$provideGlance$2$1.invoke(SampleGlanceAppWidget.kt:28)
at cn.itmob.glance.SampleGlanceAppWidget$provideGlance$2$1.invoke(SampleGlanceAppWidget.kt:27)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:228)
at androidx.glance.GlanceThemeKt.GlanceTheme(GlanceTheme.kt:44)
at cn.itmob.glance.SampleGlanceAppWidget$provideGlance$2.invoke(SampleGlanceAppWidget.kt:27)
at cn.itmob.glance.SampleGlanceAppWidget$provideGlance$2.invoke(SampleGlanceAppWidget.kt:26)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.glance.appwidget.SizeBoxKt$SizeBox$1.invoke(SizeBox.kt:127)
at androidx.glance.appwidget.SizeBoxKt$SizeBox$1.invoke(SizeBox.kt:74)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:228)
WM-WorkerWrapper cn.itmob.glance E at androidx.glance.appwidget.SizeBoxKt.SizeBox-IbIYxLY(SizeBox.kt:74)
at androidx.glance.appwidget.SizeBoxKt.ForEachSize-eVKgIn8(SizeBox.kt:114)
at androidx.glance.appwidget.AppWidgetSession$provideGlance$1$1.invoke(AppWidgetSession.kt:110)
at androidx.glance.appwidget.AppWidgetSession$provideGlance$1$1.invoke(AppWidgetSession.kt:90)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:228)
at androidx.glance.appwidget.AppWidgetSession$provideGlance$1.invoke(AppWidgetSession.kt:85)
at androidx.glance.appwidget.AppWidgetSession$provideGlance$1.invoke(AppWidgetSession.kt:84)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.compose.runtime.RecomposeScopeImpl.compose(RecomposeScopeImpl.kt:169)
at androidx.compose.runtime.ComposerImpl.recomposeToGroupEnd(Composer.kt:2468)
at androidx.compose.runtime.ComposerImpl.skipCurrentGroup(Composer.kt:2737)
at androidx.compose.runtime.ComposerImpl.doCompose(Composer.kt:3352)
at androidx.compose.runtime.ComposerImpl.recompose$runtime_release(Composer.kt:3303)
at androidx.compose.runtime.CompositionImpl.recompose(Composition.kt:781)
at androidx.compose.runtime.Recomposer.performRecompose(Recomposer.kt:1097)
at androidx.compose.runtime.Recomposer.access$performRecompose(Recomposer.kt:124)
at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2$1.invoke(Recomposer.kt:569)
at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2$1.invoke(Recomposer.kt:537)
at androidx.compose.runtime.BroadcastFrameClock$FrameAwaiter.resume(BroadcastFrameClock.kt:42)
at androidx.compose.runtime.BroadcastFrameClock.sendFrame(BroadcastFrameClock.kt:71)
at androidx.glance.session.InteractiveFrameClock.sendFrame(InteractiveFrameClock.kt:127)
at androidx.glance.session.InteractiveFrameClock.access$sendFrame(InteractiveFrameClock.kt:39)
at androidx.glance.session.InteractiveFrameClock$onNewAwaiters$2.invokeSuspend(InteractiveFrameClock.kt:117)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at android.os.Handler.handleCallback(Handler.java:958)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:205)
at android.os.Looper.loop(Looper.java:294)
at android.app.ActivityThread.main(ActivityThread.java:8177)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)
WM-WorkerWrapper cn.itmob.glance I Worker result FAILURE for Work [ id=f5579d86-cdff-4f7c-8468-291da5542dbc, tags={ androidx.glance.session.SessionWorker } ]
2. IllegalStateException: CompositionLocal LocalDensity not present
package cn.itmob.glance
class SampleGlanceAppWidget : GlanceAppWidget() {
//...
@Composable
fun Greeting() {
val widthPx = with(LocalDensity.current) { LocalSize.current.width.toPx() }
Text(text = "https://itmob.cn")
}
}
上面代码抛出的异常日志：
WM-WorkerWrapper cn.itmob.glance E Work [ id=5cf91d87-22e6-468b-8f7a-16e2153a9b90, tags={ androidx.glance.session.SessionWorker } ] failed because it threw an exception/error
java.util.concurrent.ExecutionException: java.lang.IllegalStateException: CompositionLocal LocalDensity not present
at androidx.work.impl.utils.futures.AbstractFuture.getDoneValue(AbstractFuture.java:516)
at androidx.work.impl.utils.futures.AbstractFuture.get(AbstractFuture.java:475)
at androidx.work.impl.WorkerWrapper$2.run(WorkerWrapper.java:311)
at androidx.work.impl.utils.SerialExecutor$Task.run(SerialExecutor.java:91)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.IllegalStateException: CompositionLocal LocalDensity not present
at androidx.compose.ui.platform.CompositionLocalsKt.noLocalProvidedFor(CompositionLocals.kt:220)
at androidx.compose.ui.platform.CompositionLocalsKt.access$noLocalProvidedFor(CompositionLocals.kt:1)
at androidx.compose.ui.platform.CompositionLocalsKt$LocalDensity$1.invoke(CompositionLocals.kt:83)
at androidx.compose.ui.platform.CompositionLocalsKt$LocalDensity$1.invoke(CompositionLocals.kt:82)
at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
at androidx.compose.runtime.LazyValueHolder.getCurrent(ValueHolders.kt:29)
at androidx.compose.runtime.LazyValueHolder.getValue(ValueHolders.kt:31)
at androidx.compose.runtime.CompositionLocalMapKt.read(CompositionLocalMap.kt:88)
at androidx.compose.runtime.ComposerImpl.consume(Composer.kt:2049)
at cn.itmob.glance.SampleGlanceAppWidget.Greeting(SampleGlanceAppWidget.kt:50)
at cn.itmob.glance.SampleGlanceAppWidget.access$Greeting(SampleGlanceAppWidget.kt:21)
at cn.itmob.glance.SampleGlanceAppWidget$provideGlance$2$1.invoke(SampleGlanceAppWidget.kt:27)
at cn.itmob.glance.SampleGlanceAppWidget$provideGlance$2$1.invoke(SampleGlanceAppWidget.kt:26)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:228)
at androidx.glance.GlanceThemeKt.GlanceTheme(GlanceTheme.kt:44)
at cn.itmob.glance.SampleGlanceAppWidget$provideGlance$2.invoke(SampleGlanceAppWidget.kt:26)
at cn.itmob.glance.SampleGlanceAppWidget$provideGlance$2.invoke(SampleGlanceAppWidget.kt:25)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.glance.appwidget.SizeBoxKt$SizeBox$1.invoke(SizeBox.kt:127)
at androidx.glance.appwidget.SizeBoxKt$SizeBox$1.invoke(SizeBox.kt:74)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:228)
at androidx.glance.appwidget.SizeBoxKt.SizeBox-IbIYxLY(SizeBox.kt:74)
at androidx.glance.appwidget.SizeBoxKt.ForEachSize-eVKgIn8(SizeBox.kt:114)
at androidx.glance.appwidget.AppWidgetSession$provideGlance$1$1.invoke(AppWidgetSession.kt:110)
at androidx.glance.appwidget.AppWidgetSession$provideGlance$1$1.invoke(AppWidgetSession.kt:90)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:228)
at androidx.glance.appwidget.AppWidgetSession$provideGlance$1.invoke(AppWidgetSession.kt:85)
at androidx.glance.appwidget.AppWidgetSession$provideGlance$1.invoke(AppWidgetSession.kt:84)
WM-WorkerWrapper cn.itmob.glance E at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:108)
at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35)
at androidx.compose.runtime.RecomposeScopeImpl.compose(RecomposeScopeImpl.kt:169)
at androidx.compose.runtime.ComposerImpl.recomposeToGroupEnd(Composer.kt:2468)
at androidx.compose.runtime.ComposerImpl.skipCurrentGroup(Composer.kt:2737)
at androidx.compose.runtime.ComposerImpl.doCompose(Composer.kt:3352)
at androidx.compose.runtime.ComposerImpl.recompose$runtime_release(Composer.kt:3303)
at androidx.compose.runtime.CompositionImpl.recompose(Composition.kt:781)
at androidx.compose.runtime.Recomposer.performRecompose(Recomposer.kt:1097)
at androidx.compose.runtime.Recomposer.access$performRecompose(Recomposer.kt:124)
at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2$1.invoke(Recomposer.kt:569)
at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2$1.invoke(Recomposer.kt:537)
at androidx.compose.runtime.BroadcastFrameClock$FrameAwaiter.resume(BroadcastFrameClock.kt:42)
at androidx.compose.runtime.BroadcastFrameClock.sendFrame(BroadcastFrameClock.kt:71)
at androidx.glance.session.InteractiveFrameClock.sendFrame(InteractiveFrameClock.kt:127)
at androidx.glance.session.InteractiveFrameClock.access$sendFrame(InteractiveFrameClock.kt:39)
at androidx.glance.session.InteractiveFrameClock$onNewAwaiters$2.invokeSuspend(InteractiveFrameClock.kt:117)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at android.os.Handler.handleCallback(Handler.java:958)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:205)
at android.os.Looper.loop(Looper.java:294)
at android.app.ActivityThread.main(ActivityThread.java:8177)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)
WM-WorkerWrapper cn.itmob.glance I Worker result FAILURE for Work [ id=5cf91d87-22e6-468b-8f7a-16e2153a9b90, tags={ androidx.glance.session.SessionWorker } ]