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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

<concept id="GUID-BF6ECC83-C7A0-4183-B835-6299CC2114AF" xml:lang="en"><title>Querying

if feedback is supported</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>You do not normally need to check whether tactile feedback is supported

or not, as it is safe to call the API functions even if feedback is not supported.</p>

<p>However, in some cases using the area registry can require complex calculations

for e.g. at portrait/landscape mode changes. In case these calculations cause

too much overhead, you can use the <xref href="jar:GUID-759FBC7F-5384-4487-8457-A8D4B76F6AA6.jar!/html/classMTouchFeedback.html#c2b7967bf3d203ca223ea5d99647a2ef" format="application/java-archive"><codeph>TouchFeedbackSupported</codeph></xref> function to check whether

feedback is supported or not, and skip the calculations in case there is no

feedback at all.</p>

</conbody></concept>