# RecyclerView.ChildDrawingOrderCallback

Artifact: [androidx.recyclerview:recyclerview](https://developer.android.com/jetpack/androidx/releases/recyclerview) [View Source](https://cs.android.com/search?q=file:androidx/recyclerview/widget/RecyclerView.java+class:androidx.recyclerview.widget.RecyclerView.ChildDrawingOrderCallback) Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/recyclerview#1.0.0)

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```
public interface RecyclerView.ChildDrawingOrderCallback
```

<br />

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A callback interface that can be used to alter the drawing order of RecyclerView children.

It works using the `https://developer.android.com/reference/android/view/ViewGroup.html#getChildDrawingOrder(int, int)` method, so any case that applies to that method also applies to this callback. For example, changing the drawing order of two views will not have any effect if their elevation values are different since elevation overrides the result of this callback.

## Summary

| ### Public methods |
|---|---|
| `abstract int` | `https://developer.android.com/reference/androidx/recyclerview/widget/RecyclerView.ChildDrawingOrderCallback#onGetChildDrawingOrder(int,int)(int childCount, int i)` Returns the index of the child to draw for this iteration. |

## Public methods

### onGetChildDrawingOrder

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/recyclerview#1.0.0)

```
abstract int onGetChildDrawingOrder(int childCount, int i)
```

Returns the index of the child to draw for this iteration. Override this if you want to change the drawing order of children. By default, it returns i.

| Parameters |
|---|---|
| `int childCount` | The total number of children. |
| `int i` | The current iteration. |

| Returns |
|---|---|
| `int` | The index of the child to draw this iteration. |

| See also |
|---|---|
| `https://developer.android.com/reference/androidx/recyclerview/widget/RecyclerView#setChildDrawingOrderCallback(androidx.recyclerview.widget.RecyclerView.ChildDrawingOrderCallback)` |   |