== Prerequisites ==
[[File:UI_Android_AR_Unsupported_CPU.jpg|thumb|alt=POI View Unavailable|POI View Unavailable]]
For the POI view to function and deliver a satisfactory user experience, a device's processors must meet certain requirements (support [http://www.arm.com/products/processors/technologies/neon.php NEON from ARM]) ({{Version/AndroidSince|2.4.5}}).
Devices such as the following are known to lack such a technology and, therefore, can not use the POI view.
* Samsung Galaxy Tab 10.1 P7500
* Samsung Galaxy Tab 8.9 P7300
* Unitech TB100
{{Version/AndroidSince|2.4.5}}
== Visualization ==
[[File:UI_Android_LLA_Only_Button_Activate.jpg|thumb|alt=Button to Activate LLA Only Mode|Button to Activate LLA Only Mode]]
[[File:UI_Android_LLA_Only_Button_Deactivate.jpg|thumb|alt=Button to Deactivate LLA Only Mode|Button to Deactivate LLA Only Mode]]
(Available since {{Version/Android|2.4.1}})
Sometimes, it is necessary to temporarily turn on [[Location_Manager#Possible_positioning_modes|LLA only mode]]. For example, once the users enter a building where GPS or other locating systems are not reliable enough, they could, however, use the on-site LLA markers to precisely locate themselves. Afterwards, the LLA only mode can be turned off so that the users can continue to use the locating systems outside the building. {{UBIK}} provides a '''LLA only mode button''' in the POI view for scenarios like this{{Version/AndroidSince|2.4.1}}.
When '''LLA only mode''' is '''inactive''', there should be a toggle button in the POI view:
=== Compass Calibration Button ===
[[File:Set_compass_offset_intransparent.png|thumb|alt=Button to set compass north to the current heading|Button to set compass north to the current heading]]
(Available since {{Version/Android|2.4.5}})
This button can be used in order to calibrate the compass, e.g. for a demonstration use case or if it points in the wrong direction({{Version/AndroidSince|2.4.1}}).
When it is clicked, the compass will behave as if the current heading was north. Technically, as compass offset setting is used in the background.
Therefore, in order to use it, do the following: