codename one image from url

The placeholder image is the image that should show while the image from URL is being downloaded and it's an EncodedImage.

If your Label already have an icon as a placeholder, you can use its icon, otherwise you can create a new placeholder image. Below are 3 options to create an EncodedImage and a URLImage usage example:

Method 1:

//generate a grey placeholder that matches the size of the label's icon
Image placeholder = Image.createImage(label.getIcon().getWidth(), label.getIcon().getWidth(), 0xbfc9d2);
EncodedImage encImage = EncodedImage.createFromImage(placeholder, false);

Method 2:

//Convert the label icon to EncodedImage
EncodedImage encImage = (EncodedImage)label.getIcon();

Method 3:

//Create a fresh grey EncodedImage when label doesn't have any icon set initially
int deviceWidth = Display.getInstance().getDisplayWidth();
Image placeholder = Image.createImage(deviceWidth / 10, deviceWidth / 10, 0xbfc9d2); //square image set to 10% of screen width
EncodedImage encImage = EncodedImage.createFromImage(placeholder, false);

Usage Example:

It's a good practice to use the URL as the cached image name in storage. If you have a multiple sizes of the same image, just prefix them with a unique string like "Large" + URL

 label.setIcon(URLImage.createToStorage(encImage, "Medium_" + "http://xxx/myurl.jpg", "http://xxx/myurl.jpg", URLImage.RESIZE_SCALE));