T- The specific subclass of view wrapped by this target.
Z- The resource type this target will receive.
public abstract class ViewTarget<T extends View,Z> extends BaseTarget<Z>
Views that provides default implementations for most most methods and can determine the size of views using a
View reuse in
ListView or any
ViewGroup that reuses
views, this class uses the
View.setTag(Object) method to store some metadata so that if a view is reused,
any previous loads or resources from previous loads can be cancelled or reused.
Any calls to
View.setTag(Object)} on a View given to this class will result in excessive allocations and
IllegalArgumentExceptions. If you must call
View.setTag(Object) on a view, consider
|Modifier and Type||Field and Description|
|Constructor and Description|
|Modifier and Type||Method and Description|
Returns any stored request using
Determines the size of the view by first checking
Returns the wrapped
Stores the request using
Sets the android resource id to use in conjunction with
onDestroy, onLoadCleared, onLoadFailed, onLoadStarted, onStart, onStop
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
public ViewTarget(T view)
public static void setTagId(int tagId)
View.setTag(int, Object)to store temporary state allowing loads to be automatically cancelled and resources re-used in scrolling lists.
If no tag id is set, Glide will use
Warning: prior to Android 4.0 tags were stored in a static map. Using this method prior
to Android 4.0 may cause memory leaks and isn't recommended. If you do use this method
on older versions, be sure to call
Glide.clear(View) on any view
you start a load into to ensure that the static state is removed.
tagId- The android resource to use.
public void getSize(SizeReadyCallback cb)
View.getHeight(). If one or both are zero, it then checks the view's
ViewGroup.LayoutParams. If one or both of the params width and height are less than or equal to zero, it then adds an
ViewTreeObserver.OnPreDrawListenerwhich waits until the view has been measured before calling the callback with the view's drawn width and height.
cb- The callback that must be called when the size of the target has been determined
public void setRequest(Request request)
public Request getRequest()
For Glide to function correctly, Glide must be the only thing that calls
View.setTag(Object). If the
tag is cleared or set to another object type, Glide will not be able to retrieve and cancel previous loads
which will not only prevent Glide from reusing resource, but will also result in incorrect images being
loaded and lots of flashing of images in lists. As a result, this will throw an
View.getTag()} returns a non null object
that is not an