Merge "Add an API to force Views to render their layer." (acc3944d) · Commits · e / os / android_frameworks_base

api/current.xml

+11 −0

Original line number	Diff line number	Diff line
		@@ -220707,6 +220707,17 @@
		<parameter name="autoScale" type="boolean">
		</parameter>
		</method>
		<method name="buildLayer"
		return="void"
		abstract="false"
		native="false"
		synchronized="false"
		static="false"
		final="false"
		deprecated="not deprecated"
		visibility="public"
		>
		</method>
		<method name="cancelLongPress"
		return="void"
		abstract="false"

+31 −0

Original line number	Diff line number	Diff line
		@@ -8488,6 +8488,7 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
		* {@link #LAYER_TYPE_HARDWARE}
		*
		* @see #setLayerType(int, android.graphics.Paint)
		* @see #buildLayer()
		* @see #LAYER_TYPE_NONE
		* @see #LAYER_TYPE_SOFTWARE
		* @see #LAYER_TYPE_HARDWARE
		@@ -8496,6 +8497,36 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
		return mLayerType;
		}

		/**
		* Forces this view's layer to be created and this view to be rendered
		* into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE},
		* invoking this method will have no effect.
		*
		* This method can for instance be used to render a view into its layer before
		* starting an animation. If this view is complex, rendering into the layer
		* before starting the animation will avoid skipping frames.
		*
		* @throws IllegalStateException If this view is not attached to a window
		*
		* @see #setLayerType(int, android.graphics.Paint)
		*/
		public void buildLayer() {
		if (mLayerType == LAYER_TYPE_NONE) return;

		if (mAttachInfo == null) {
		throw new IllegalStateException("This view must be attached to a window first");
		}

		switch (mLayerType) {
		case LAYER_TYPE_HARDWARE:
		getHardwareLayer();
		break;
		case LAYER_TYPE_SOFTWARE:
		buildDrawingCache(true);
		break;
		}
		}

		/**
		* <p>Returns a hardware layer that can be used to draw this view again
		* without executing its draw method.</p>