Desugaing required error even If minimum Android API Version set to 26+

[mdsanf1]

Describe the bug

The SDK documentation indicates that,

The SDK supports Android minimum API of 24 but requires [desugaring](https://developer.android.com/studio/write/java8-support#library-desugaring) to support Java 8 language APIs used in by the SDK. If minimum Android API Version is set to 26+ desugaring is not required.

However, while building a sample APP with minSdk = 28, :app:checkDebugAarMetadata is failing with error,

2 issues were found when checking AAR metadata:

  1.  Dependency 'software.amazon.awssdk.iotdevicesdk:aws-iot-device-sdk-android:1.33.0' requires core library desugaring to be enabled
      for :app.

      See https://developer.android.com/studio/write/java8-support.html for more
      details.

  2.  Dependency 'software.amazon.awssdk.crt:aws-crt-android:0.47.0' requires core library desugaring to be enabled
      for :app.

      See https://developer.android.com/studio/write/java8-support.html for more
      details.

Expected Behavior

The app build should succeed without error if desugaring is not enabled and when minSdk is 26+.

Current Behavior

The app build fails with error indicating that desugaring is not enabled (minSdk is 28).

Reproduction Steps

Steps to reproduce:

• Create a sample android project.
• Add the dependency to "software.amazon.awssdk.iotdevicesdk:aws-iot-device-sdk-android"
• Try building the project or run ./gradlew :app:checkDebugAarMetadata
• The build fails.

Note:
agp version: "9.3.1"
AWS IoT device SDK version: "1.34.0"

Possible Solution

No response

Additional Information/Context

No response

SDK version used

1.34.0

Environment details (OS name and version, etc.)

Android. AGP version: 9.3.1

[rakshil14-2]

Hi @mdsanf1,

Thanks for raising this. If you want to remove the desugaring requirement entirely, you would need to build both libraries (aws-iot-device-sdk-android and its transitive aws-crt-android dependency) from source at minSdk 26+, after which you can disable core library desugaring. Since you are consuming the prebuilt SDK from Maven, the simpler path is to enable core library desugaring in your app's build.gradle.

For clarification, we have updated the ANDROID.md document.

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