A Simple Key For view Unveiled



The view drawing cache was mostly produced obsolete With all the introduction of components-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unneeded and can certainly lead to a Internet decline in functionality because of the price of making and updating the layer. Within the exceptional circumstances where caching levels are helpful, for example for alpha animations, setLayerType(int, android.graphics.Paint) handles this with components rendering.

If a nested scrolling kid view would Usually fling however it is at the sting of its very own content, it could possibly use this technique to delegate the fling to its nested scrolling parent rather. The father or mother may well optionally eat the fling or observe a toddler fling.

The title this view really should existing to accessibility to be a pane title. See View.setAccessibilityPaneTitle(CharSequence) Could be a string benefit, working with ';' to escape characters like 'n' or 'uxxxx' to get a unicode character;

Defines the direction on the textual content. Might be an integer price, such as "100". Needs to be certainly one of the following continual values.

Returns the ViewTreeObserver for this view's hierarchy. The view tree observer may be used to have notifications when world-wide activities, like format, take place. The returned ViewTreeObserver observer is not guaranteed to keep on being valid with the life time of this View.

A Format where by the positions of the youngsters might be explained in relation to each other or for the parent.  ScrollView

Structure is really a two move course of action: a measure go as well as a structure pass. The measuring move is implemented in measure(int, int) and is particularly a best-down traversal of your view tree. Each and every view pushes dimension specs down the tree in the recursion. At the conclusion of the evaluate pass, every view has stored its measurements. The 2nd move comes about in format(int, int, int, int) and can be top-down. For the duration of this pass Every single parent is answerable for positioning all of its children using the dimensions computed within the evaluate pass. Any time a view's evaluate() method returns, its getMeasuredWidth() and getMeasuredHeight() values needs to be set, together with Individuals for all of that view's descendants. A view's calculated width and calculated peak values have to respect the constraints imposed through the view's mom and dad. This guarantees that at the conclusion of the evaluate pass, all moms and dads settle for all in their kid's measurements. A mum or dad view might simply call measure() greater than at the time on its little ones. For example, the dad or mum may possibly measure Every single kid the moment with unspecified dimensions to Discover how massive they want to be, then call measure() on them once again with get more info actual numbers In case the sum of all the children's unconstrained dimensions is just too huge or much too smaller. The evaluate go makes use of two lessons to communicate dimensions. The MeasureSpec course is used by views to inform their mother and father how they want to be measured and positioned.

Sets the colour with the ambient shadow that is definitely drawn in the event the view has a positive Z or elevation value.  android:outlineSpotShadowColor

Program layers ought to be avoided in the event the influenced view tree updates frequently. Each individual update would require to re-render the application layer, which could probably be gradual (significantly when components acceleration is turned on since the layer must be uploaded into a components texture following just about every update.)

Returns correct If your effective visibility in the view at this time is opaque, whatever the transparent region; returns Fake if it is possible for underlying Home windows being found behind the view.

Returns the ViewTranslationResponse connected with this view. The response are going to be set when the translation is completed then onViewTranslationResponse(ViewTranslationResponse) is known as. The ViewTranslationCallback can use to have ViewTranslationResponse to display the translated information and facts.}

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