View.GatherTransparentRegion(Region) Method

Reference

Definition

Namespace:: Android.Views

Assembly:: Mono.Android.dll

Important

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This is used by the ViewRoot to perform an optimization when the view hierarchy contains one or several SurfaceView.

[Android.Runtime.Register("gatherTransparentRegion", "(Landroid/graphics/Region;)Z", "GetGatherTransparentRegion_Landroid_graphics_Region_Handler", ApiSince=31)]
public virtual bool GatherTransparentRegion (Android.Graphics.Region? region);

[<Android.Runtime.Register("gatherTransparentRegion", "(Landroid/graphics/Region;)Z", "GetGatherTransparentRegion_Landroid_graphics_Region_Handler", ApiSince=31)>]
abstract member GatherTransparentRegion : Android.Graphics.Region -> bool
override this.GatherTransparentRegion : Android.Graphics.Region -> bool

Parameters

region: Region

The transparent region for this ViewAncestor (window).

Returns

Boolean

Returns true if the effective visibility of the view at this point is opaque, regardless of the transparent region; returns false if it is possible for underlying windows to be seen behind the view.

Attributes: RegisterAttribute

Remarks

This is used by the ViewRoot to perform an optimization when the view hierarchy contains one or several SurfaceView. SurfaceView is always considered transparent, but its children are not, therefore all View objects remove themselves from the global transparent region (passed as a parameter to this function).

Java documentation for android.view.View.gatherTransparentRegion(android.graphics.Region).

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Applies to

通过