Getting no application can do this action on Android while using Codename One share button - share

Question

My Codename One app features a ShareButton that is used like this :
// Share this report on social networks (text plus screenshot)
ShareButton shareReportButton = new ShareButton();
shareReportButton.setText("Share this report!");
shareReportButton.getAllStyles().setBorder(
RoundBorder.create().rectangle(true));
FontImage.setMaterialIcon(shareReportButton, FontImage.MATERIAL_SHARE);
shareReportButton.getStyle().setBgColor(ParametresGeneraux.accentColor);
shareReportButton.getPressedStyle().setBgColor(ParametresGeneraux.darkPrimaryColor);
shareReportButton.setTextToShare("I reported this via the great app ABCD "!"
);
shareReportButton.setImageToShare(currentReport.getPhotoPath(), ImageIO.FORMAT_PNG);
I works as expected under the simulator but on an actual Android 4.4 device I get a Dialog menu with "No app can do this action".
Please note that it is possible to share eg a photo with the native apps.
I could not find any build hint to add in the doc. What should I do to make the share button offer a way to share a text + photo on the social networks ?
Any help appreciated,
Regards
EDIT
Following #James H and #Diamond answers, the image type has to be set as mime type. Consequently replacing ImageIO.FORMAT_PNG by "image/jpg" makes the share menu populated.
For completeness please notice that as stated in the doc
an image must be stored using the FileSystemStorage API and shouldn't use a different API like Storage!
So even if the photo is in the cache you have to copy it eg to your home folder and then use this copied version in the ShareButton.

Answer 1

I think the problem might be that
setImageToShare(String imagePath, String imageMimeType)
is looking for a Mime description with a different format, such as: "image/png"
I'm not sure that ImageIO.FORMAT_PNG works in this way. Looking at the sample in the JavaDoc, it uses:
sb.setImageToShare(imageFile, "image/png");

Answer 2

Use the native share functionality and check if sharing natively is support by doing the following:
// Share this report on social networks (text plus screenshot)
Button shareReportButton = new Button("Share this report!");
shareReportButton.getAllStyles().setBorder(create().rectangle(true));
FontImage.setMaterialIcon(shareReportButton, FontImage.MATERIAL_SHARE);
shareReportButton.getStyle().setBgColor(ParametresGeneraux.accentColor);
shareReportButton.getPressedStyle().setBgColor(ParametresGeneraux.darkPrimaryColor);
shareReportButton.addActionListener(e -> {
if (Display.getInstance().isNativeShareSupported()) {
Display.getInstance().share("I reported this via the great app ABCD ", currentReport.getPhotoPath(), "image/png"); // Or "image/jpg"
} else {
ToastBar.showErrorMessage("Your phone doesn't support sharing...");
}
});