AreaImageView object works almost the same as well known ImageView. The difference is that it allows you to listen to clicks of specified areas of an image that has been added to the view.
First of all, you have to define set of pixel points on your image. You can do that with the AreaImageViewSample application by choosing your image and creating a path with vertices or you can checkpoint of pixels with any image editor.
AreaImageView allows you to add two different types of listeners. Multi vertex listener and circle listener. The first one may contain gaps you want to exclude.
Creating and adding multi vertex area is that simple:
ArrayList<Point> points = new ArrayList<>();
points.add(new Point(95, 492));
points.add(new Point(97, 571));
points.add(new Point(70, 575));
points.add(new Point(70, 495));
mAreaImage.addMultiVertexClickableArea(points, R.drawable.sample1);Now you can listen on clicks and obtain information about callback with tag:
mAreaImage.addAreaListener((tag) ->
{
mAreaImage.setImageDrawable(ContextCompat.getDrawable(getActivity(), (int) tag));
});
- Pinch zoom
- Separated thread for checking if point is inside area
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