| <HTML> |
| <BODY> |
| <p>Provides classes which allow applications to use Wi-Fi RTT (IEEE 802.11mc) to measure distance |
| to supporting Access Points and peer devices.</p> |
| <p>The primary entry point to Wi-Fi RTT capabilities is the |
| {@link android.net.wifi.rtt.WifiRttManager} class, which is acquired by calling |
| {@link android.content.Context#getSystemService(String) |
| Context.getSystemService(Context.WIFI_RTT_RANGING_SERVICE)}</p> |
| |
| <p>Some APIs may require the following user permissions:</p> |
| <ul> |
| <li>{@link android.Manifest.permission#ACCESS_WIFI_STATE}</li> |
| <li>{@link android.Manifest.permission#CHANGE_WIFI_STATE}</li> |
| <li>{@link android.Manifest.permission#ACCESS_FINE_LOCATION}</li> |
| </ul> |
| <p>Usage of the API is also gated by the device's Location Mode: whether it permits Wi-Fi based |
| location to be queried.</p> |
| |
| <p class="note"><strong>Note:</strong> Not all Android-powered devices support Wi-Fi RTT |
| functionality. |
| If your application only works with Wi-Fi RTT (i.e. it should only be installed on devices which |
| support Wi-Fi RTT), declare so with a <a |
| href="{@docRoot}guide/topics/manifest/uses-feature-element.html"> |
| {@code <uses-feature>}</a> |
| element in the manifest file:</p> |
| <pre> |
| <manifest ...> |
| <uses-feature android:name="android.hardware.wifi.rtt" /> |
| ... |
| </manifest> |
| </pre> |
| <p>Alternatively, if your application does not require Wi-Fi RTT but can take advantage of it if |
| available, you can perform |
| the check at run-time in your code using {@link |
| android.content.pm.PackageManager#hasSystemFeature(String)} with {@link |
| android.content.pm.PackageManager#FEATURE_WIFI_RTT}:</p> |
| <pre> |
| getPackageManager().hasSystemFeature(PackageManager.FEATURE_WIFI_RTT) |
| </pre> |
| </BODY> |
| </HTML> |
