Min SDK version

[uyt95]

Hi, when I tried upgrading to the latest release version of MapView, I noticed that you have increased to minimum sdk version from 23 to 24. I'm currently supporting version 23 with my apps and I was wondering what the reason for the increase was?

[p-lr]

You're right. I can't remember why I did that. I've just checked, and MapView compiles just fine against API level 23.
I'll revert the change and publish a new version.

[Edit]
For some reason the bintray repo doesn't take the new version - probably because I generate the same binary. Or maybe there's another issue.

[p-lr]

It looks like it finally took it.
2.0.11 is published

[uyt95]

Thanks for your help!

[uyt95]

I think I found why you changed the min sdk version. I can run my app normally, but if I try to create a release build for uploading to the play store it fails with the following error message:
Static interface methods are only supported starting with Android N (--min-api 24): float com.peterlaurence.mapview.core.TileOptionsProvider.access$getAlphaTick$jd(com.peterlaurence.mapview.core.TileOptionsProvider) Stack trace: com.android.tools.r8.a: Static interface methods are only supported starting with Android N (--min-api 24): float com.peterlaurence.mapview.core.TileOptionsProvider.access$getAlphaTick$jd(com.peterlaurence.mapview.core.TileOptionsProvider) at com.android.tools.r8.dex.r.a(:47) at com.android.tools.r8.dex.r.b(:4) at com.android.tools.r8.dex.b.a(:63) at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:125) at com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:69) at com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:78) at com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:322) at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) at com.google.common.util.concurrent.AbstractListeningExecutorService.submit(AbstractListeningExecutorService.java:66) at com.google.common.util.concurrent.AbstractListeningExecutorService.submit(AbstractListeningExecutorService.java:36) at com.android.tools.r8.dex.b.b(:46) at com.android.tools.r8.D8.d(:87) at com.android.tools.r8.D8.b(:1) at com.android.tools.r8.utils.W.a(:30) at com.android.tools.r8.D8.run(:11) at com.android.builder.dexing.D8DexArchiveBuilder.convert(D8DexArchiveBuilder.java:116) at com.android.build.gradle.internal.dependency.BaseDexingTransform.process(DexingTransform.kt:296) at com.android.build.gradle.internal.dependency.BaseDexingTransform.processNonIncrementally(DexingTransform.kt:243) at com.android.build.gradle.internal.dependency.BaseDexingTransform.doTransform(DexingTransform.kt:153) at com.android.build.gradle.internal.dependency.BaseDexingTransform.access$doTransform(DexingTransform.kt:69) at com.android.build.gradle.internal.dependency.BaseDexingTransform$transform$1.invoke(DexingTransform.kt:104) at com.android.build.gradle.internal.dependency.BaseDexingTransform$transform$1.invoke(DexingTransform.kt:69) at com.android.build.gradle.internal.tasks.BlocksUtilsKt.recordArtifactTransformSpan(BlocksUtils.kt:33) at com.android.build.gradle.internal.dependency.BaseDexingTransform.transform(DexingTransform.kt:100) at org.gradle.api.internal.artifacts.transform.DefaultTransformer.transform(DefaultTransformer.java:189) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory$TransformerExecution.execute(DefaultTransformerInvocationFactory.java:332) at org.gradle.internal.execution.steps.ExecuteStep.lambda$execute$0(ExecuteStep.java:32) at java.util.Optional.map(Optional.java:215) at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:32) at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:26) at org.gradle.internal.execution.steps.CleanupOutputsStep.execute(CleanupOutputsStep.java:63) at org.gradle.internal.execution.steps.CleanupOutputsStep.execute(CleanupOutputsStep.java:35) at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:49) at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:34) at org.gradle.internal.execution.steps.CancelExecutionStep.execute(CancelExecutionStep.java:43) at org.gradle.internal.execution.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:73) at org.gradle.internal.execution.steps.TimeoutStep.execute(TimeoutStep.java:54) at org.gradle.internal.execution.steps.CatchExceptionStep.execute(CatchExceptionStep.java:34) at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:44) at org.gradle.internal.execution.steps.SnapshotOutputsStep.execute(SnapshotOutputsStep.java:54) at org.gradle.internal.execution.steps.SnapshotOutputsStep.execute(SnapshotOutputsStep.java:38) at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:49) at org.gradle.internal.execution.steps.CacheStep.executeWithoutCache(CacheStep.java:153) at org.gradle.internal.execution.steps.CacheStep.execute(CacheStep.java:67) at org.gradle.internal.execution.steps.CacheStep.execute(CacheStep.java:41) at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:44) at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:33) at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:38) at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:24) at org.gradle.internal.execution.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:92) at org.gradle.internal.execution.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:85) at java.util.Optional.map(Optional.java:215) at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:55) at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:39) at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:76) at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:37) at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:36) at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:26) at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:94) at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:49) at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:79) at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:53) at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:74) at org.gradle.internal.execution.steps.SkipEmptyWorkStep.lambda$execute$2(SkipEmptyWorkStep.java:78) at java.util.Optional.orElseGet(Optional.java:267) at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:78) at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:34) at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsStartedStep.execute(MarkSnapshottingInputsStartedStep.java:39) at org.gradle.internal.execution.steps.LoadExecutionStateStep.execute(LoadExecutionStateStep.java:40) at org.gradle.internal.execution.steps.LoadExecutionStateStep.execute(LoadExecutionStateStep.java:28) at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:33) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory$2.lambda$call$2(DefaultTransformerInvocationFactory.java:200) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory.fireTransformListeners(DefaultTransformerInvocationFactory.java:269) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory.access$300(DefaultTransformerInvocationFactory.java:79) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory$2.call(DefaultTransformerInvocationFactory.java:178) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory$2.call(DefaultTransformerInvocationFactory.java:175) at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416) at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406) at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158) at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102) at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory.lambda$doTransform$0(DefaultTransformerInvocationFactory.java:175) at org.gradle.api.internal.artifacts.transform.ImmutableTransformationWorkspaceProvider.lambda$withWorkspace$0(ImmutableTransformationWorkspaceProvider.java:81) at org.gradle.cache.internal.LockOnDemandCrossProcessCacheAccess.withFileLock(LockOnDemandCrossProcessCacheAccess.java:90) at org.gradle.cache.internal.DefaultCacheAccess.withFileLock(DefaultCacheAccess.java:181) at org.gradle.cache.internal.DefaultPersistentDirectoryStore.withFileLock(DefaultPersistentDirectoryStore.java:172) at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.withFileLock(DefaultCacheFactory.java:196) at org.gradle.api.internal.artifacts.transform.ImmutableTransformationWorkspaceProvider.withWorkspace(ImmutableTransformationWorkspaceProvider.java:76) at org.gradle.api.internal.artifacts.transform.AbstractCachingTransformationWorkspaceProvider.lambda$withWorkspace$0(AbstractCachingTransformationWorkspaceProvider.java:56) at com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4718) at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3445) at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2194) at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2153) at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2043) at com.google.common.cache.LocalCache.get(LocalCache.java:3851) at com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4713) at org.gradle.api.internal.artifacts.transform.AbstractCachingTransformationWorkspaceProvider.withWorkspace(AbstractCachingTransformationWorkspaceProvider.java:55) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory.doTransform(DefaultTransformerInvocationFactory.java:175) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory.access$000(DefaultTransformerInvocationFactory.java:79) at org.gradle.api.internal.artifacts.transform.DefaultTransformerInvocationFactory$1.invoke(DefaultTransformerInvocationFactory.java:141) at org.gradle.api.internal.artifacts.transform.CacheableInvocation$1.invoke(CacheableInvocation.java:58) at org.gradle.api.internal.artifacts.transform.TransformationNode$ChainedTransformationNode$1.lambda$transform$0(TransformationNode.java:226) at org.gradle.internal.Try$Success.flatMap(Try.java:157) at org.gradle.api.internal.artifacts.transform.TransformationNode$ChainedTransformationNode$1.transform(TransformationNode.java:225) at org.gradle.api.internal.artifacts.transform.TransformationNode$ArtifactTransformationStepBuildOperation.call(TransformationNode.java:267) at org.gradle.api.internal.artifacts.transform.TransformationNode$ArtifactTransformationStepBuildOperation.call(TransformationNode.java:247) at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416) at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406) at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158) at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102) at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36) at org.gradle.api.internal.artifacts.transform.TransformationNode$ChainedTransformationNode.execute(TransformationNode.java:222) at org.gradle.execution.plan.WorkNodeExecutor.execute(WorkNodeExecutor.java:27) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:372) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:359) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:352) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:338) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.lambda$run$0(DefaultPlanExecutor.java:127) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:191) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:182) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:124) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56) at java.lang.Thread.run(Thread.java:748) Suppressed: java.util.concurrent.ExecutionException: com.android.tools.r8.a: Static interface methods are only supported starting with Android N (--min-api 24): float com.peterlaurence.mapview.core.TileOptionsProvider.access$getAlphaTick$jd(com.peterlaurence.mapview.core.TileOptionsProvider) at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:552) at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:513) at com.google.common.util.concurrent.FluentFuture$TrustedFuture.get(FluentFuture.java:86) at com.android.tools.r8.utils.S0.a(:14) at com.android.tools.r8.dex.b.b(:101) ... 120 more [CIRCULAR REFERENCE:com.android.tools.r8.a: Static interface methods are only supported starting with Android N (--min-api 24): float com.peterlaurence.mapview.core.TileOptionsProvider.access$getAlphaTick$jd(com.peterlaurence.mapview.core.TileOptionsProvider)]

[p-lr]

The reason is because we use @JvmDefault in TileOptionsProvider, which was introduced in 2.0.5. TileOptionsProvider provides additional control on how each individual tiles are rendered.
As you can see, this interface has default values:

interface TileOptionsProvider {
    /* Must not be a blocking call - should return immediately */
    @JvmDefault
    fun getColorFilter(row: Int, col: Int, zoomLvl: Int): ColorFilter? = null

    /**
     * Controls the speed of fade in effect when rendering tiles. Higher values make alpha
     * value go to 255 faster. Should be in between (0.0f, 1.0f].
     */
    @JvmDefault
    val alphaTick : Float
        get() = 0.07f
}

However, this is only supported for Java code through the use of Java 8 features. I've just tested that on an Android app with min sdk 23 - it compiles successfully for a release build. All you have to do is add in the build.gradle (of the module which uses MapView):

android {
  ...
  // Configure only for each module that uses Java 8
  // language features (either in its source code or
  // through dependencies).
  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }
  // For Kotlin projects
  kotlinOptions {
    jvmTarget = "1.8"
  }
}

Let me know if that solves your issue.

[uyt95]

Thanks! This did solve the issue 😃