To get more clarity, look at the following gif.Package com. Don’t add dividers as views - It has side effectsĭuring the item animation divider will be animated along with the animation, since divider is part of the view. To add a divider we had to create an additional outer layout. Consider the above example, we really don’t need the outer linear layout. Sometimes adding the divider as a view increases the layout hierarchy. We know that having less number of views in the layout is better for performance.

When adding the divider to the layout, we are increasing the view count. Whenever we are taking a shortcut it might have some adverse effects. But developers find it difficult and directly add the dividers to the view, instead of using the item decoration. You need to add an ItemDecoration which can draw the divider. īut with RecyclerView, you can not directly add a divider. You can add the divider through xml itself. ListView had a native way to add the divider. I have personally seen some developers taking shortcuts to add dividers to the RecyclerView. Don’t add dividers as views -It affects performance A decoration can be a divider or just an inset. ItemDecoration gives full control to the developers in measuring and drawing the decorations. Within the getView() method you would inflate an XML based layout and then set the content of the individual views based on the Java object for this row. But ItemDecoration can be drawn on all four sides of the item. A divider, as the name suggests, can only be drawn between items. We can not simply say that ItemDecoration is just a divider with a fancy name. However, as the ListView and Grid expanded, it went off the screen. Now let’s understand how to use a listview in an android application with an example.

Consequently, Row 1 of the grid also expanded to this height. Custom List: The Row Item Layout A ListView added to a layout in Android Studio Your properties area on the right should look like this, with the jagged lines. I believe it was expanding in height according to the number of items. This can be useful for drawing dividers between items, highlights, visual grouping boundaries and more. The ListView spanned three columns of the grid on Row 1. So what is ItemDecoration? This is how official doc puts it.Īn ItemDecoration allows the application to add a special drawing and layout offset to specific item views from the adapter’s data set. On my emulator everything is allright and the data is loaded correctly from JSON API, the data also loads on my device. ItemDecoration can be drawn to all four sides of RecyclerView itemsįirst things first. Im having a weird problem regarding the simple ListView.

Set visible android studio listview