There is a problem with the screen width

[theoyuncu8]

When I look at the layout view, it looks something like this. .width looks like this even though I made 100 dp? I wonder why?

also there is notifyDataChanged in the codes, does this not cause performance problems?

[zhpanvip]

The width and height of IndicatorView are dynamically set, which is related to the pagesize you set and the width and height of the slider.Since these parameters are not available in the preview, it seems that there will be problems. notifyDataChanged This method is only to update the View, there will be no performance loss