Images

Adding Images

  • Create two packages in the Resources folder, one named list and another named images.

  • Create an images list file, and add it to the list package (myapp.images.list).

  • Save the following image to the images package:

    ../../_images/microej_logo.png
  • The structure looks like this:

    ../../_images/resources.png
  • Then go to the myapp.images.list and add the image file:

    /images/microej_logo.png:ARGB4444
    
  • The image declaration in the .list file follows this pattern:

    path:format
    
  • path is the path to the image file, relative to the resources folder.

  • format specifies how the image will be embedded in the application.

Note

The ARGB4444 mode is used here because the image has transparency, more info in the Images section.

Displaying an Image

  • To display this image, first create an instance of the widget ImageWidget, specifying the path to the image in the constructor:

    ImageWidget image = new ImageWidget("/images/microej_logo.png");
    
  • Add the widget to the canvas container by adding this line:

    canvas.addChild(image, 0, 30, Widget.NO_CONSTRAINT, Widget.NO_CONSTRAINT);
    
  • The final code looks like this:

    public static void main(String[] args) {
       MicroUI.start();
       Desktop desktop = new Desktop();
       Label label = new Label("Hello World");
       Label label2 = new Label("Hello World 2");
    
       Canvas canvas = new Canvas();
       canvas.addChild(label, 0, 0, Widget.NO_CONSTRAINT, Widget.NO_CONSTRAINT);
       canvas.addChild(label2, 0, 15, Widget.NO_CONSTRAINT, Widget.NO_CONSTRAINT);
    
       ImageWidget image = new ImageWidget("/images/microej_logo.png");
       canvas.addChild(image, 0, 30, Widget.NO_CONSTRAINT, Widget.NO_CONSTRAINT);
    
       CascadingStylesheet css = new CascadingStylesheet();
       EditableStyle style = css.getSelectorStyle(new TypeSelector(Label.class));
       style.setColor(Colors.RED);
       style.setBorder(new RectangularBorder(Colors.BLACK, 1));
    
       desktop.setStylesheet(css);
       desktop.setWidget(canvas);
       desktop.requestShow();
    }
    
    ../../_images/imagessimulator.png