Before you begin
Before you start to code using the Nearby Connections API:
- Install the Google Play Services SDK.
- Download and review the Nearby Connections API code samples.
Request permissions
Before using Nearby Connections, your app must request the appropriate
permissions for the Strategy you plan to use. See the section on
Strategies and the documentation for
Strategy
for more information.
For example, in order to use the P2P_STAR Strategy, add the specified
permissions to your AndroidManifest.xml:
<!-- Required for Nearby Connections --> <uses-permission android:name="android.permission.BLUETOOTH" /> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <!-- Optional: only required for FILE payloads --> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
Since ACCESS_FINE_LOCATION and READ_EXTERNAL_STORAGE are considered to be dangerous system permissions,
in addition to adding them to your manifest, you must request these permissions at
runtime, as described in Requesting Permissions.
If the user does not grant all required permissions for the Strategy you plan to use, the Nearby Connections API will refuse to allow your app to start advertising or discovering.