com.bumptech.glide.request.target

Interface Target<R>

Type Parameters:

R - The type of resource the target can display.

All Superinterfaces:

LifecycleListener

All Known Subinterfaces:

FutureTarget<R>

All Known Implementing Classes:

AppWidgetTarget, BaseTarget, BitmapImageViewTarget, BitmapThumbnailImageViewTarget, DrawableImageViewTarget, DrawableThumbnailImageViewTarget, ImageViewTarget, NotificationTarget, PreloadTarget, RequestFutureTarget, SimpleTarget, ThumbnailImageViewTarget, ViewTarget

public interface Target<R>
extends LifecycleListener

An interface that Glide can load a resource into and notify of relevant lifecycle events during a load.

The lifecycle events in this class are as follows:

• onLoadStarted
• onResourceReady
• onLoadCleared
• onLoadFailed

The typical lifecycle is onLoadStarted -> onResourceReady or onLoadFailed -> onLoadCleared. However, there are no guarantees. onLoadStarted may not be called if the resource is in memory or if the load will fail because of a null model object. onLoadCleared similarly may never be called if the target is never cleared. See the docs for the individual methods for details.

Field Summary

Fields

Modifier and Type	Field and Description
static int	SIZE_ORIGINAL Indicates that we want the resource in its original unmodified width and/or height.

Method Summary

Modifier and Type	Method and Description
Request	getRequest() Retrieves the current request for this target, should not be called outside of Glide.
void	getSize(SizeReadyCallback cb) A method to retrieve the size of this target.
void	onLoadCleared(Drawable placeholder) A lifecycle callback that is called when a load is cancelled and its resources are freed.
void	onLoadFailed(Drawable errorDrawable) A lifecycle callback that is called when a load fails.
void	onLoadStarted(Drawable placeholder) A lifecycle callback that is called when a load is started.
void	onResourceReady(R resource, Transition<? super R> transition) The method that will be called when the resource load has finished.
void	removeCallback(SizeReadyCallback cb) Removes the given callback from the pending set if it's still retained.
void	setRequest(Request request) Sets the current request for this target to retain, should not be called outside of Glide.

Methods inherited from interface com.bumptech.glide.manager.LifecycleListener

onDestroy, onStart, onStop

Field Detail

SIZE_ORIGINAL

static final int SIZE_ORIGINAL

Indicates that we want the resource in its original unmodified width and/or height.

See Also:

Constant Field Values

Method Detail

onLoadStarted

void onLoadStarted(@Nullable
                   Drawable placeholder)

A lifecycle callback that is called when a load is started.

Note - This may not be called for every load, it is possible for example for loads to fail before the load starts (when the model object is null).

Note - This method may be called multiple times before any other lifecycle method is called. Loads can be paused and restarted due to lifecycle or connectivity events and each restart may cause a call here.

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

Parameters:

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

onLoadFailed

void onLoadFailed(@Nullable
                  Drawable errorDrawable)

A lifecycle callback that is called when a load fails.

Note - This may be called before onLoadStarted(android.graphics.drawable.Drawable) if the model object is null.

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

Parameters:

errorDrawable - The error drawable to optionally show, or null.

onResourceReady

void onResourceReady(R resource,
                     Transition<? super R> transition)

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

Parameters:

resource - the loaded resource.

onLoadCleared

void onLoadCleared(@Nullable
                   Drawable placeholder)

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

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

Parameters:

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

getSize

void getSize(SizeReadyCallback cb)

A method to retrieve the size of this target.

Parameters:

cb - The callback that must be called when the size of the target has been determined

removeCallback

void removeCallback(SizeReadyCallback cb)

Removes the given callback from the pending set if it's still retained.

Parameters:

cb - The callback to remove.

setRequest

void setRequest(@Nullable
                Request request)

Sets the current request for this target to retain, should not be called outside of Glide.

getRequest

@Nullable
Request getRequest()

Retrieves the current request for this target, should not be called outside of Glide.