Package com.bumptech.glide.request.target

Class PreloadTarget<Z>

java.lang.Object

com.bumptech.glide.request.target.CustomTarget<Z>

com.bumptech.glide.request.target.PreloadTarget<Z>

Type Parameters:

Z - The type of resource that will be loaded into memory.

All Implemented Interfaces:

LifecycleListener, Target<Z>

public final class PreloadTarget<Z>
extends CustomTarget<Z>

A one time use Target class that loads a resource into memory and then clears itself.

Field Summary

Fields inherited from interface com.bumptech.glide.request.target.Target

SIZE_ORIGINAL

Method Summary

Modifier and Type	Method	Description
static <Z> PreloadTarget<Z>	obtain(RequestManager requestManager, int width, int height)	Returns a PreloadTarget.
void	onLoadCleared(Drawable placeholder)	A mandatory lifecycle callback that is called when a load is cancelled and its resources are freed.
void	onResourceReady(Z resource, Transition<? super Z> transition)	The method that will be called when the resource load has finished.

Methods inherited from class com.bumptech.glide.request.target.CustomTarget

getRequest, getSize, onDestroy, onLoadFailed, onLoadStarted, onStart, onStop, removeCallback, setRequest

Methods inherited from class java.lang.Object

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

Method Details

obtain

public static <Z> PreloadTarget<Z> obtain(RequestManager requestManager,
 int width,
 int height)

Returns a PreloadTarget.

Type Parameters:

Z - The type of the desired resource.

Parameters:

width - The width in pixels of the desired resource.

height - The height in pixels of the desired resource.

onResourceReady

public void onResourceReady(@NonNull
 Z resource,
 @Nullable
 Transition<? super Z> transition)

Description copied from interface: Target

The method that will be called when the resource load has finished.

This may be called multiple times both within a single load and also across different loads if the Target object is re-used.

Within a single load this may be called multiple times for reasons that include:

• The load uses one or more thumbnails. Each time a thumbnail load completes successfully and no higher priority load has finished, this method will be called with the thumbnail resource. See RequestBuilder.thumbnail(com.bumptech.glide.RequestBuilder).
• The load is paused and restarted. This can happen automatically in response to connectivity changes or the Activity / Fragment lifecycle. It can also happen if RequestManager.pauseRequests() is called manually.

Parameters:

resource - the loaded resource.

onLoadCleared

public void onLoadCleared(@Nullable
 Drawable placeholder)

Description copied from interface: Target

A mandatory lifecycle callback that is called when a load is cancelled and its resources are freed.

You must ensure that any current Drawable received in Target.onResourceReady(Object, Transition) is no longer used before redrawing the container (usually a View) or changing its visibility.

Parameters:

placeholder - The placeholder drawable to optionally show, or null.