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.NET MAUI › Troubleshooting & Common Errors

How do you fix 'Java heap space'/build OutOfMemory errors on Android?

Intermediate

Answer

Increase the Java max heap for the Android build (JavaMaximumHeapSize), enable D8/R8 and resource shrinking, disable multidex issues, and ensure you're not bundling excessive assets. For large apps, enable AndroidLinkMode and reduce ABIs during debug to speed and lighten builds.
<PropertyGroup>
    <JavaMaximumHeapSize>2G</JavaMaximumHeapSize>
    <AndroidEnableMultiDex>true</AndroidEnableMultiDex>
</PropertyGroup>
Real-world example A CI Android build stops failing after raising the Java heap size and enabling R8 shrinking.

Common follow-ups: What does R8 do? | Why limit ABIs in debug?

Android Deployment Troubleshooting & Common Errors
All 7 Troubleshooting & Common Errors questions