android - Click by bounds / coordinates

Question

I know it is possible for Espresso to click by bounds the way UiAutomator does. (x and y coordinates) I have read through the documentation but I can't seem to find it. Any help is appreciated. Thanks

Edit
I found this link, but no examples how to use it, My main concern with this is the UiController is or how to use it.

Answer 1

Espresso has the GeneralClickAction, this is the underlying implementation of ViewActions click(), doubleClick(), and longClick().

The GeneralClickAction's constructor takes a CoordinatesProvider as second argument. So the basic idea is to create a static ViewAction getter which provides a custom CoordinatesProvider. Something like this:

public static ViewAction clickXY(final int x, final int y){
    return new GeneralClickAction(
        Tap.SINGLE,
        new CoordinatesProvider() {
            @Override
            public float[] calculateCoordinates(View view) {

               final int[] screenPos = new int[2];
               view.getLocationOnScreen(screenPos);

               final float screenX = screenPos[0] + x;
               final float screenY = screenPos[1] + y;
               float[] coordinates = {screenX, screenY};

               return coordinates;
            }
        },
        Press.FINGER);
}

A general advice with Espresso: instead of looking for documentation (there's virtually none), look at the source code. Espresso is open source and the source code itself is of really good quality.