JS: java.lang.Exception: Failed resolving method read on class android.media.AudioRecord - nativescript

Question

I'm trying to use android.media.AudioRecord to save audio, initialization is OK, startRecording() is also called without error, but when I start reading audio from the buffer I got error Failed resolving method read on class android.media.AudioRecord.
Here is the code:
const SAMPLE_RATE = 44100;
const RECORD_AUDIO = android.Manifest.permission.RECORD_AUDIO;
const AudioRecord = android.media.AudioRecord;
const AudioFormat = android.media.AudioFormat;
const MediaRecorder = android.media.MediaRecorder;
ngOnInit(): void {
this.bufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
if (this.bufferSize == AudioRecord.ERROR || this.bufferSize == AudioRecord.ERROR_BAD_VALUE) {
this.bufferSize = SAMPLE_RATE * 2;
}
this.bufferSize = this.bufferSize * 10;
this.audioBuffer = new Array(this.bufferSize / 2);
if (!permissions.hasPermission(RECORD_AUDIO)) {
permissions.requestPermission(RECORD_AUDIO).then(() => {
this.createRecorder();
}, (err) => {
console.log('[BrowseComponent] ngOnInit, ', 'permissions error:', err);
});
}
else {
this.createRecorder();
}
}
createRecorder() {
this.record = new AudioRecord.Builder()
.setAudioSource(MediaRecorder.AudioSource.VOICE_COMMUNICATION)
.setAudioFormat(new AudioFormat.Builder()
.setEncoding(AudioFormat.ENCODING_PCM_16BIT)
.setSampleRate(SAMPLE_RATE)
.setChannelMask(AudioFormat.CHANNEL_IN_MONO)
.build())
.setBufferSizeInBytes(this.bufferSize)
.build();
this.recordState = this.record && this.record.getState();
if (this.recordState != AudioRecord.STATE_INITIALIZED) {
console.error('[BrowseComponent] createRecorder, ', 'AudioRecord can\'t initialize, state:', this.recordState);
return;
}
console.log('[BrowseComponent] createRecorder, ', 'AudioRecord:', this.record);
}
startRecord() {
this.recording = true;
this.record.startRecording();
this.shortsRead = 0;
while (this.recording) {
const numberOfShort = this.record.read(this.audioBuffer, 0, this.bufferSize);
this.shortsRead += numberOfShort;
// Do something with the audioBuffer
}
}
startRecord() is called from (tap) button handler.
Any ideas what may be wrong?

Answer 1

I guess the problem is that you are passing JavaScript Array instead of the Java Primitive (short) typed Array, so the runtime is unable to identify a method that matches the given parameters.
Use Array.create method to typecast, refer the docs here for more details.