Error fetching Account Info on Android Kotlin `java.nio.BufferUnderflowException`

Question

I want to fetch an account's data using [Metaplex KT Library][1].

I am still facing error while fetching an account: code:

try {
             val serializer = SolanaAccountSerializer(BorshAsBase64JsonArraySerializer((ProgramInfo.serializer())))
                val account = solana.api.getAccountInfo(serializer, getProgramInfoPda().address).getOrThrow()

                Log.d(TAG, "fetchQuestionCount: ${account}")
            } catch (e: Exception) {
                Log.d(TAG, "fetchQuestionCount Error: ${e.message}")
         }

Context: ProgramInfo is my own class:

@Serializable
data class ProgramInfo(var author: @Contextual PublicKey, var question_count: @Contextual Number, var bump: @Contextual Number) {
}

This is the error: Error: Size must be known in advance when using READ_ALL

Answer 1

Hard to tell what the problem is, but maybe you need to use another Serializer. What kind of account is it? Anchor?
Then maybe

SolanaAccountSerializer

is what you are searching for.

Answer 2

Try out sol4k for this. Getting account info can be done like this:

val usdc = PublicKey("Gh9ZwEmdLJ8DscKNTkTqPbNwLNNBjuSzaG9Vp2KGtKJr")
val connection = Connection(rpcUrl)
val accountInfo = connection.getAccountInfo(usdc)

Find the full example in this integration test.