An example that converts base64 string to an input stream without creating a new byte array

Base64StringToInputStream.kt

import android.util.Base64
import android.util.Base64InputStream
import org.apache.commons.io.input.ReaderInputStream //implementation 'commons-io:commons-io:2.19.0' https://central.sonatype.com/artifact/commons-io/commons-io?smo=true
import tr.com.avivasa.mobileapp.base.BasePresenter
import java.io.StringReader
import java.nio.charset.StandardCharsets

val base64String = "someBase64String"
val inputStream = Base64InputStream(
    ReaderInputStream.builder()
        .setReader(StringReader(base64String))
        .setCharset(StandardCharsets.US_ASCII)
        .get(),
    Base64.DEFAULT
)