Provides classes which allow applications to use Wi-Fi RTT (IEEE 802.11mc) to measure distance to supporting Access Points and peer devices.

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)}

Some APIs may require the following user permissions:

• {@link android.Manifest.permission#ACCESS_WIFI_STATE}
• {@link android.Manifest.permission#CHANGE_WIFI_STATE}
• {@link android.Manifest.permission#ACCESS_FINE_LOCATION}

Usage of the API is also gated by the device's Location Mode: whether it permits Wi-Fi based location to be queried.

Note: 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 {@code } element in the manifest file:

<manifest ...>
    <uses-feature android:name="android.hardware.wifi.rtt" />
    ...
</manifest>

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}:

    getPackageManager().hasSystemFeature(PackageManager.FEATURE_WIFI_RTT)

For an example of this functionality, see Wi-Fi location: ranging with RTT.