CODEWITHSUNDEEP
androidkotlinflutter
Abion47
Abion47

Reputation: 24671

Unresolved reference at compile but available by Intellisense

I'm working on an audio processing library for Flutter, and I'm running into an issue with one of my native Kotlin classes. In the code sample below, the compiler is complaining that the call to copyInto on the samples array is an unresolved reference. As far as I can tell, I've made sure that it is an IntArray, and Intellisense in Android Studio even brings up copyInto as an option when I type "samples.".

Here is my class code:

package com.----.audio_channels

import kotlin.math.abs
import kotlin.math.min

abstract class AudioTrackBuffer constructor(val loop: Boolean) {
    var position: Int = 0

    abstract fun getSamples(sampleCount: Int): IntArray
    abstract fun isComplete(): Boolean
    abstract fun dispose()
}

class RawAudioBuffer constructor(private val samples: IntArray, loop: Boolean, delay: Int): AudioTrackBuffer(loop) {

    init {
        position = -delay
    }

    override fun getSamples(sampleCount: Int): IntArray {
        val slice: IntArray

        if (position < 0) {
            slice = IntArray(sampleCount) { 0 }

            if (position + sampleCount < 0) {
                position += sampleCount
                return slice
            }

            val offset = abs(position)
            samples.copyInto(slice, offset, 0, min(sampleCount - offset, samples.size)) // Error
        } else {
            slice = samples.copyOfRange(position, min(position + sampleCount, samples.size))
            position += slice.size
        }

        return slice
    }

    override fun isComplete(): Boolean {
        return position >= samples.size
    }

    override fun dispose() {}
}

And here is the compile error:

Launching lib\main.dart on SM N960U in debug mode...
Initializing gradle...
Resolving dependencies...
Running Gradle task 'assembleDebug'...
e: E:\flutter\workspace\audio_channels\android\src\main\kotlin\com\----\audio_channels\AudioTrackBuffer.kt: (33, 21): Unresolved reference: copyInto

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':audio_channels:compileDebugKotlin'.
> Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 1s
Finished with error: Gradle task assembleDebug failed with exit code 1

Upvotes: 1

Views: 1654

Answers (1)

Linh
Linh

Reputation: 60923

The copyInto function available since kotlin 1.3. Currently, you are using 1.2.71 then you get error Unresolved reference: copyInto.
Therefore, update your app kotlin version to >= 1.3 will solve your problem

Upvotes: 4

Related Questions