captureAudio example in codenameone not working on device simulator - codenameone

Question

I am trying the captureAudio example given in the codenameone documentation https://gist.githubusercontent.com/codenameone/a347dc9dcadaa759d0cb/raw/089f171a37e43f558ce897a0b51cab46219c37c0/CaptureAudioSample.java
Copying the code here for convenience:
Form hi = new Form("Capture", BoxLayout.y());
hi.setToolbar(new Toolbar());
Style s = UIManager.getInstance().getComponentStyle("Title");
FontImage icon = FontImage.createMaterial(FontImage.MATERIAL_MIC, s);
FileSystemStorage fs = FileSystemStorage.getInstance();
String recordingsDir = fs.getAppHomePath() + "recordings/";
fs.mkdir(recordingsDir);
try {
for(String file : fs.listFiles(recordingsDir)) {
MultiButton mb = new MultiButton(file.substring(file.lastIndexOf("/") + 1));
mb.addActionListener((e) -> {
try {
Media m = MediaManager.createMedia(recordingsDir + file, false);
m.play();
} catch(IOException err) {
Log.e(err);
}
});
hi.add(mb);
}
hi.getToolbar().addCommandToRightBar("", icon, (ev) -> {
try {
String file = Capture.captureAudio();
if(file != null) {
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MMM-dd-kk-mm");
String fileName =sd.format(new Date());
String filePath = recordingsDir + fileName;
Util.copy(fs.openInputStream(file), fs.openOutputStream(filePath));
MultiButton mb = new MultiButton(fileName);
mb.addActionListener((e) -> {
try {
Media m = MediaManager.createMedia(filePath, false);
m.play();
} catch(IOException err) {
Log.e(err);
}
});
hi.add(mb);
hi.revalidate();
}
} catch(IOException err) {
Log.e(err);
}
});
} catch(IOException err) {
Log.e(err);
}
hi.show();
I am using Intellij and trying to test the above code in device simulator. But when I click the mic button I see a 'file chooser' dialog box with only a cancel option enabled. On clicking cancel nothing happens. If I choose a wav file then click ok, it gets copied and i am able to play it in simulator. Is mic input not supported in simulator? Is it getting replaced with file input? Or am I doing anything wrong?

Answer 1

We don't capture from the mic in the simulator as we consider the file chooser more convenient for debugging and simulating actual capture cases. This allows us to reproduce failures/test cases with 100% accuracy.
Also the media API's in JavaSE are "flaky" and we don't want to rely on them anymore than we have to.
On the device you will get a recorder interface as usual.
Notice that this is true for image, video capture and picking from the picture gallery too.