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HashMap can be replaced with SparseArray

HashMap can be replaced with SparseArray

For maps where the keys are of type integer, it's typically more efficient to use the Android SparseArray API. This check identifies scenarios where you might want to consider using SparseArray instead of HashMap for better performance.

This is particularly useful when the value types are primitives like ints, where you can use SparseIntArray and avoid auto-boxing the values from int to Integer.

If you need to construct a HashMap because you need to call an API outside of your control which requires a Map, you can suppress this warning using for example the @SuppressLint annotation.

Issue id: UseSparseArrays

Inspection Details

Available in:

IntelliJ IDEA 2023.3, Qodana for Android 2023.3, Qodana for JVM 2023.3


Android, 2022.3.1 Beta 2

Last modified: 13 July 2023