Call Activity from a view

Question

I have a class called TouchImageView extends ImageView and I detect where the user clicks on it. If it is a interest point, I want to call a method on the Detailed_Image_Activity that will update a WebView. How can I achieve this?

I found some ideas about using observer and observables but I don't know how to do that. I found this solution Equivalent of iOS NSNotificationCenter in Android? but I can't make it work it

This is my code in the TouchImageView class...

switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
        if(isPointOfInterest) {
            //The code below is used to update the WebView
            //The task called below exists in the Detailed_Image_Activity
            DownloadHighlightBackground HighlightDownloaderTask = new DownloadHighlightBackground();
            HighlightDownloaderTask.execute(new String[] { arg1.toString() });
        }
}

Answer 1

Try this,

You can get the activity from within the view, in this way..

((MyActivity)getContext()).method_name();