| <HTML> |
| <BODY> |
| <p>Provides classes to create peer-to-peer (P2P) connections with Wi-Fi Direct.</p> |
| |
| <p>Using these APIs, you can discover and connect to other devices when each |
| device supports Wi-Fi Direct, then communicate over a speedy connection across distances much longer |
| than a Bluetooth connection. The primary class you need to work with is {@link |
| android.net.wifi.p2p.WifiP2pManager}, which you can acquire by calling {@link |
| android.app.Activity#getSystemService getSystemService(WIFI_P2P_SERVICE)}. The {@link |
| android.net.wifi.p2p.WifiP2pManager} includes APIs that allow you to:</p> |
| <ul> |
| <li>Initialize your application for P2P connections by calling {@link |
| android.net.wifi.p2p.WifiP2pManager#initialize initialize()}</li> |
| |
| <li>Discover nearby devices by calling {@link android.net.wifi.p2p.WifiP2pManager#discoverPeers |
| discoverPeers()}</li> |
| |
| <li>Start a P2P connection by calling {@link android.net.wifi.p2p.WifiP2pManager#connect |
| connect()}</li> |
| <li>And more</li> |
| </ul> |
| |
| <p>Several other interfaces and classes are necessary as well, such as:</p> |
| <ul> |
| <li>The {@link android.net.wifi.p2p.WifiP2pManager.ActionListener} interface allows you to receive |
| callbacks when an operation such as discovering peers or connecting to them succeeds or fails.</li> |
| |
| <li>{@link android.net.wifi.p2p.WifiP2pManager.PeerListListener} interface allows you to receive |
| information about discovered peers. The callback provides a {@link |
| android.net.wifi.p2p.WifiP2pDeviceList}, from which you can retrieve a {@link |
| android.net.wifi.p2p.WifiP2pDevice} object for each device within range and get information such as |
| the device name, address, device type, the WPS configurations the device supports, and more.</li> |
| |
| <li>The {@link android.net.wifi.p2p.WifiP2pManager.GroupInfoListener} interface allows you to |
| receive information about a P2P group. The callback provides a {@link |
| android.net.wifi.p2p.WifiP2pGroup} object, which provides group information such as the owner, the |
| network name, and passphrase.</li> |
| |
| <li>{@link android.net.wifi.p2p.WifiP2pManager.ConnectionInfoListener} interface allows you to |
| receive information about the current connection. The callback provides a {@link |
| android.net.wifi.p2p.WifiP2pInfo} object, which has information such as whether a group has been |
| formed and who is the group owner.</li> |
| </ul> |
| |
| <p>In order to use the Wi-Fi P2P APIs, your app must request 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#INTERNET} (although your app doesn’t technically connect |
| to the Internet, communicating to Wi-Fi Direct peers with standard java sockets requires Internet |
| permission).</li> |
| </ul> |
| |
| <p>For example code, see the <a href="{@docRoot}resources/samples/WiFiDirectDemo/index.html">Wi-Fi |
| Direct Demo</a> sample application.</p> |
| |
| <p class="note"><strong>Note:</strong> Not all Android-powered devices support Wi-Fi |
| Direct. If your application uses Wi-Fi Direct, 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.direct" /> |
| ... |
| </manifest> |
| </pre> |
| </BODY> |
| </HTML> |
