12 <task id="GUID-44FDDA27-1A5D-42B5-8DE0-D9E88EB75C93" xml:lang="en"><title>Querying |
12 <task id="GUID-44FDDA27-1A5D-42B5-8DE0-D9E88EB75C93" xml:lang="en"><title>Querying |
13 for Sensor Channels</title><shortdesc>You can retrieve a list of sensor channels that are available for |
13 for Sensor Channels</title><shortdesc>You can retrieve a list of sensor channels that are available for |
14 a particular sensor type. Once you get the list of sensor channels that are |
14 a particular sensor type. Once you get the list of sensor channels that are |
15 active, you can perform any required operations such as configuring sensor |
15 active, you can perform any required operations such as configuring sensor |
16 channel properties, controlling sensor channels and so on.</shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody> |
16 channel properties, controlling sensor channels and so on.</shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody> |
17 <steps id="GUID-4DD07DEC-6017-4237-BE46-1D69E5FBD744-GENID-1-10-1-9-1-1-6-1-4-1-4-1-4-1-3-1"> |
17 <steps id="GUID-4DD07DEC-6017-4237-BE46-1D69E5FBD744-GENID-1-10-1-11-1-1-6-1-4-1-4-1-4-1-3-1"> |
18 <step id="GUID-EE1655E2-D4C4-4593-A0E1-BD1DFACB0351"><cmd>Create an instance |
18 <step id="GUID-EE1655E2-D4C4-4593-A0E1-BD1DFACB0351"><cmd>Create an instance |
19 of <codeph>TSensrvChannelInfo</codeph> and set the required channel type as |
19 of <codeph>TSensrvChannelInfo</codeph> and set the required channel type as |
20 the search criteria. For example, to query for all double tapping channels |
20 the search criteria. For example, to query for all double tapping channels |
21 provided by accelerometer sensor, set the channel type as <codeph>KSensrvChannelTypeIdAccelerometerDoubleTappingData</codeph>.</cmd> |
21 provided by accelerometer sensor, set the channel type as <codeph>KSensrvChannelTypeIdAccelerometerDoubleTappingData</codeph>.</cmd> |
22 <stepxmp><codeblock xml:space="preserve">TSensrvChannelInfo channelInfo; |
22 <stepxmp><codeblock xml:space="preserve">TSensrvChannelInfo channelInfo; |
26 of <codeph>CSensrvChannelFinder</codeph> class and use the <xref href="GUID-5F108D03-C8A6-3EF9-B103-2E8916633602.dita#GUID-5F108D03-C8A6-3EF9-B103-2E8916633602/GUID-E58BAF1B-57AA-3E85-A4F9-8C6C29043FBD"><apiname>CSensrvChannelFinder::FindChannelsL()</apiname></xref> function |
26 of <codeph>CSensrvChannelFinder</codeph> class and use the <xref href="GUID-5F108D03-C8A6-3EF9-B103-2E8916633602.dita#GUID-5F108D03-C8A6-3EF9-B103-2E8916633602/GUID-E58BAF1B-57AA-3E85-A4F9-8C6C29043FBD"><apiname>CSensrvChannelFinder::FindChannelsL()</apiname></xref> function |
27 to query for available sensor channels.</cmd> |
27 to query for available sensor channels.</cmd> |
28 <stepxmp><codeblock xml:space="preserve">CSensrvChannelFinder* finder = CSensrvChannelFinder::NewL(); |
28 <stepxmp><codeblock xml:space="preserve">CSensrvChannelFinder* finder = CSensrvChannelFinder::NewL(); |
29 finder->FindChannelsL(channelList, searchParameters);</codeblock></stepxmp> |
29 finder->FindChannelsL(channelList, searchParameters);</codeblock></stepxmp> |
30 </step> |
30 </step> |
31 <step id="GUID-9A69E5AD-E938-4092-A8C2-CB65C37C8962-GENID-1-10-1-9-1-1-6-1-4-1-4-1-4-1-3-1-3"><cmd>Create an instance |
31 <step id="GUID-9A69E5AD-E938-4092-A8C2-CB65C37C8962-GENID-1-10-1-11-1-1-6-1-4-1-4-1-4-1-3-1-3"><cmd>Create an instance |
32 of <codeph>RSensrvChannelInfoList</codeph> to store the list of sensor channels.</cmd> |
32 of <codeph>RSensrvChannelInfoList</codeph> to store the list of sensor channels.</cmd> |
33 <stepxmp><codeblock xml:space="preserve">RSensrvChannelInfoList channelInfoList;</codeblock></stepxmp> |
33 <stepxmp><codeblock xml:space="preserve">RSensrvChannelInfoList channelInfoList;</codeblock></stepxmp> |
34 </step> |
34 </step> |
35 </steps> |
35 </steps> |
36 <result id="GUID-F26EFE38-DF01-4531-89AD-191049E31F36"> <p>The <parmname>channelInfoList</parmname> contains |
36 <result id="GUID-F26EFE38-DF01-4531-89AD-191049E31F36"> <p>The <parmname>channelInfoList</parmname> contains |