Android & Dalvik - Get the size of an object

Question

As we all know Java 5 introduced the ability for Instrumentation to get the size of an object with ease. Is there such a method on Android and Dalvik?

The java

Answer 1

My idea to get the size of a ArrayList on the heap was to serialize the object into a Byte-Array, where the lengths is the size.

I've used the SerializationUtils from Apache Commons Lang.

To serialize:

byte[] data = SerializationUtils.serialize((Serializable) arrayList);

The lenght of the data array should be approximately the size in bytes on the heap.

As mentioned, this requires Commons Lang library. It can be imported using Gradle:

api 'org.apache.commons:commons-lang3:3.5'

more ways mentioned here