Package com.bumptech.glide.util

Class ViewPreloadSizeProvider<T>

java.lang.Object

com.bumptech.glide.util.ViewPreloadSizeProvider<T>

Type Parameters:

T - The type of the model the size should be provided for.

All Implemented Interfaces:

ListPreloader.PreloadSizeProvider<T>, SizeReadyCallback

public class ViewPreloadSizeProvider<T>
extends Object
implements ListPreloader.PreloadSizeProvider<T>, SizeReadyCallback

A ListPreloader.PreloadSizeProvider that will extract the preload size from a given View.

Constructor Summary

Constructors

Constructor	Description
ViewPreloadSizeProvider()	Constructor that does nothing by default and requires users to call setView(android.view.View) when a View is available to registerComponents the dimensions returned by this class.
ViewPreloadSizeProvider(View view)	Constructor that will extract the preload size from a given View.

Method Summary

Modifier and Type	Method	Description
int[]	getPreloadSize(T item, int adapterPosition, int itemPosition)	Returns the size of the view in the list where the resources will be displayed in pixels in the format [x, y], or null if no size is currently available.
void	onSizeReady(int width, int height)	A callback called on the main thread.
void	setView(View view)	Sets the View the size will be extracted.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ViewPreloadSizeProvider

public ViewPreloadSizeProvider()

Constructor that does nothing by default and requires users to call setView(android.view.View) when a View is available to registerComponents the dimensions returned by this class.

ViewPreloadSizeProvider

public ViewPreloadSizeProvider(@NonNull
 View view)

Constructor that will extract the preload size from a given View.

Parameters:

view - A not null View the size will be extracted from async using an .OnPreDrawListener

Method Details

getPreloadSize

@Nullable
public int[] getPreloadSize(@NonNull
 T item,
 int adapterPosition,
 int itemPosition)

Description copied from interface: ListPreloader.PreloadSizeProvider

Returns the size of the view in the list where the resources will be displayed in pixels in the format [x, y], or null if no size is currently available.

Note - The dimensions returned here must precisely match those of the view in the list.

If this method returns null, then no request will be started for the given item.

Specified by:

getPreloadSize in interface ListPreloader.PreloadSizeProvider<T>

Parameters:

item - A model

onSizeReady

public void onSizeReady(int width,
 int height)

Description copied from interface: SizeReadyCallback

A callback called on the main thread.

Specified by:

onSizeReady in interface SizeReadyCallback

Parameters:

width - The width in pixels of the target, or Target.SIZE_ORIGINAL to indicate that we want the resource at its original width.

height - The height in pixels of the target, or Target.SIZE_ORIGINAL to indicate that we want the resource at its original height.

setView

public void setView(@NonNull
 View view)

Sets the View the size will be extracted.

Note - only the first call to this method will be obeyed, subsequent requests will be ignored.

Parameters:

view - A not null View the size will be extracted async with an .OnPreDrawListener