Android recyclerview gridlayoutmanager column width

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Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The columns width are equal but I want the first column with 80dp width. Is this possible? Create a second layout with a 80dp width to use in your RecyclerView.

Adapterthen in the onCreateViewHolder method check if the item's position equals 0, if so then inflate the layout with 80dp width, else inflate the normal layout. You should create your own viewTypes to do so, you will have to override the getItemViewType int position method for that, this will look something like this:.

Learn more. Asked 3 years, 11 months ago. Active 2 years, 10 months ago. Viewed 5k times. Francesco verheye Francesco verheye 1, 1 1 gold badge 12 12 silver badges 30 30 bronze badges.

Did you found a solution? Does the solution I assume it is, may be wrong provided in your edit really work? I set fixed width in the columns xml but there is no effect. Ixx No the edit is my code demonstrating my issue, not the solution sadly. Active Oldest Votes.

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Euphor08 Euphor08 1 1 gold badge 9 9 silver badges 22 22 bronze badges. While this answers part of the question "Is this possible? Jeffalee Jeffalee 1 1 gold badge 5 5 silver badges 14 14 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

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android recyclerview gridlayoutmanager column width

Related LayoutManager implementation to lay out items in a grid. The project consists of a single Activity : MainActivity. The xml layout of the MainActivity.

The DataModel. The xml layout for each RecyclerView item is given below. The output of the application in action is given below. As you can see in the above output, when the orientation changes to landscape, each row has three items, thereby dynamically sizing the items to auto-fit the column width.

This brings an end to this tutorial. You can download the final android GridLayoutManager project from the link given below. As per the above code all card view items have equal heights, can you make all this are with own context heights, like flexible card items. You can randomly set different height for your items in adapter. But keep in mind that the overall height of the row is still constant.

You should redo this tutorial — there are so many bad coding habits in it eg. If you do a tutorial like this — make it exceptionally good so that other people can learn Android in a good way. Martin is crying. Your email address will not be published. Next Android Picasso Tutorial. Shoot him queries.

Android Tip: Auto column grid layout by RecyclerView

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GridLayoutManager.SpanSizeLookup

Vidit Babele says:. July 1, at am. Naresh says:. May 20, at am. November 13, at am. A Friend says:. June 27, at am.SpanSizeLookup extends Object. A helper class to provide the number of spans each item occupies. Default implementation sets each item to occupy exactly 1 span. Returns the number of span occupied by the item at position.

Returns whether results of getSpanGroupIndex int, int method are cached or not. Returns whether results of getSpanIndex int, int method are cached or not. Sets whether the results of getSpanGroupIndex int, int method should be cached or not.

Sets whether the results of getSpanIndex int, int method should be cached or not. Returns the index of the group this position belongs. For example, if grid has 3 columns and each item occupies 1 span, span group index for item 1 will be 0, item 5 will be 1. Returns the final span index of the provided position. If you have a faster way to calculate span index for your items, you should override this method.

Otherwise, you should enable span index cache setSpanIndexCacheEnabled boolean for better performance. When caching is disabled, default implementation traverses all items from 0 to position. When caching is enabled, it calculates from the closest cached value before the position. If you override this method, you need to make sure it is consistent with getSpanSize int. GridLayoutManager does not call this method for each item. It is called only for the reference item and rest of the items are assigned to spans based on the reference item.

For example, you cannot assign a position to span 2 while span 1 is empty. Note that span offsets always start with 0 and are not affected by RTL. Clears the span group index cache. GridLayoutManager automatically calls this method when adapter changes occur. Clears the span index cache. By default these values are not cached. If you are not overriding getSpanGroupIndex int, int with something highly performant, and you are using spans to calculate scrollbar offset and range, you should set this to true for better performance.

If you are not overriding getSpanIndex int, int with something highly performant, you should set this to true for better performance. Content and code samples on this page are subject to the licenses described in the Content License.This codelab is part of the Android Kotlin Fundamentals course.

You'll get the most value out of this course if you work through the codelabs in sequence. All the course codelabs are listed on the Android Kotlin Fundamentals codelabs landing page.

One of the main strengths of RecyclerView is that it lets you use layout managers to control and modify your layout strategy. A LayoutManager manages how the items in the RecyclerView are arranged. RecyclerView comes with out-of-the-box layout managers for common use cases. For example, you can use LinearLayout for horizontal and vertical lists, or GridLayout for grids.

For more complicated use cases, you need to implement a custom LayoutManager. In this codelab, you learn how to display data using a grid layout instead of a list, building on the sleep-tracker app from the previous codelab. If you don't have the app from the previous codelab, you can download starter code for this codelab. The first screen, shown on the left, has buttons for starting and stopping tracking. The screen shows some of the user's sleep data. The Clear button permanently deletes all the data that the app has collected for the user.

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The second screen, shown on the right, is for selecting a sleep-quality rating. This app uses a simplified architecture with a UI controller, view model and LiveDataand a Room database to persist sleep data.

The sleep data is displayed in a RecyclerView. In this codelab, you change the app to use a GridLayout. The final screen will look like the screenshot below. This code displays the data as a vertical list. LinearLayoutManager is the most common and straightforward layout manager for RecyclerViewand it supports both horizontal and vertical placement of child views.

For example, you could use LinearLayoutManager to create a carousel of images that the user scrolls horizontally. Another common use case is needing to show a lot of data to the user, which you can do using GridLayout.

From a design perspective, GridLayout is best for lists that can be represented as icons or images, such as lists within a photo browsing app. In the sleep-tracker app, you could show each night of sleep as a grid of large icons.

This design would give the user an overview of their sleep quality at a glance. GridLayout arranges items in a grid of rows and columns. Assuming vertical scrolling, by default, each item in a row takes up one "span. In the first two examples shown below, each row is made up of three spans.

By default, the GridLayoutManager lays out each item in one span until the span count, which you specify. When it reaches the span count, it wraps to the next line. By default, each item takes up one span, but you can make an item wider by specifying how many spans it is to occupy.

For example, the top item in the rightmost screen shown below takes up three spans. In this task, you take the RecyclerView that you finished in the last exercise and update it to display data using a GridLayoutManager. You can continue using the sleep-tracker app from the previous codelab, or you can download the RecyclerViewGridLayout-Starter app from GitHub. In this step, you define a more compact square item layout for the grid. Because you used data binding, you don't need to change anything in the Adapter.A RecyclerView.

LayoutManager implementations that lays out items in a grid. By default, each item occupies 1 span. Default implementation for SpanSizeLookup. Returns true if the scroll offset and scroll range calculations take account of span information. When this flag is set, the scroll offset and scroll range calculations will take account of span information.

To be called only during onLayoutChildren Recycler, State to add a view to the layout that is known to be going away, either because it has been removed or because it is actually not in the visible portion of the container but is being laid out in order to inform RecyclerView in how to animate the item out of view.

Views added via this method are going to be invisible to LayoutManager after the dispatchLayout pass is complete. They cannot be retrieved via getChildAt int or won't be included in getChildCount method. Add a view to the currently attached RecyclerView if needed. Checks if RecyclerView is in the middle of a layout or scroll and throws an IllegalStateException if it is not.

Reattach a previously detached view. This method should not be used to reattach views that were previously detachAndScrapView android. View, RecyclerView. Calculates the item decor insets applied to the given child and updates the provided Rect instance with the inset values. The Rect's left is set to the total width of left decorations. The Rect's top is set to the total height of top decorations. The Rect's right is set to the total width of right decorations. The Rect's bottom is set to total height of bottom decorations.

Note that item decorations are automatically calculated when one of the LayoutManager's measure child methods is called.

If you need to measure the child with custom specs via View measure int, intyou can use this method to get decorations. This should check to make sure that the object is of the correct type and all values are within acceptable ranges. The default implementation returns true for non-null params.

Chooses a size from the given specs and parameters that is closest to the desired size and also complies with the spec.

Temporarily detach and scrap all currently attached child views. Views will be scrapped into the given Recycler. The Recycler may prefer to reuse scrap views before other views that were previously recycled.

android recyclerview gridlayoutmanager column width

Detach a child view and add it to a Recycler's scrap heap. LayoutManagers may want to perform a lightweight detach operation to rearrange views currently attached to the RecyclerView. Recycler so that the detached view may be rebound and reused.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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It takes an explicit span count, so the problem now becomes: how do you know how many "spans" fit per row? This is a grid, after all. There should be as many spans as the RecyclerView can fit, based on measured width. Using the old GridViewyou would just set the "columnWidth" property and it would automatically detect how many columns fit. This is basically what I want to replicate for the RecyclerView:. Personaly I don't like to subclass RecyclerView for this, because for me it seems that there is GridLayoutManager's responsibility to detect span count.

I don't actually remember why I choosed to set span count in onLayoutChildren, I wrote this class some time ago. But the point is we need to do so after view get measured. EDIT 1: Fix error in code caused to incorrectly setting span count. Thanks user Elyees Abouda for reporting and suggesting solution. EDIT 2: Some small refactoring and fix edge case with manual orientation changes handling. Thanks user tatarize for reporting and suggesting solution.

I accomplished this using a view tree observer to get the width of the recylcerview once rendered and then getting the fixed dimensions of my card view from resources and then setting the span count after doing my calculations. It is only really applicable if the items you are displaying are of a fixed width.

This helped me automatically populate the grid regardless of screen size or orientation.

android recyclerview gridlayoutmanager column width

Well, this is what I used, fairly basic, but gets the job done for me.LayoutParams extends RecyclerView. LayoutParams used by GridLayoutManager. Note that if the orientation is LinearLayoutManager. Returns the up-to-date adapter position that the view this LayoutParams is attached to corresponds to in the RecyclerView. Returns the up-to-date adapter position that the view this LayoutParams is attached to corresponds to with respect to the RecyclerView. Adapter that bound this View.

This method is deprecated. This method is confusing when nested adapters are used. If you are calling from the context of an RecyclerView. Adapteruse getBindingAdapterPosition. Returns the adapter position that the view this LayoutParams is attached to corresponds to as of latest layout calculation.

Returns true if the adapter data item corresponding to the view this LayoutParams is attached to has been changed in the data set. Returns true if the adapter data item corresponding to the view this LayoutParams is attached to has been removed from the data set.

Returns true if the view this LayoutParams is attached to is now representing potentially invalid data. Returns true if the view this LayoutParams is attached to needs to have its content updated from the corresponding adapter. LayoutParams public GridLayoutManager. LayoutParams Context c, AttributeSet attrs. Returns the current span index of this View. If the View is not laid out yet, the return value is undefined.

Starting with RecyclerView Prior to If the View occupies multiple spans, span with the minimum index is returned. Returns the number of spans occupied by this View.


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