1<p>This is a demo application highlighting how to make peer to peer network connections with 2the Wi-Fi Direct APIs. The application allows you to transfer jpeg images from the gallery after a succesful connection.</p> 3 4<p>The source code for this demo app shows how to accomplish three key things 5with Wi-Fi Direct APIs: Discovering peers, connecting using Wi-Fi Direct APIs, and finding group details post connection, so that a 6TCP socket can be opened to transfer files.</p> 7 8<p>The application includes:<p> 9<ul> <li><a 10 href="src/com/example/android/wifidirect/WiFiDirectActivity.html"><code>WiFiDirectActivity</code></a> 11 — the main <code>Activity</code> that contains two fragments to handle app's UI and peer lifecycle. It also registers a broadcast receiver for Wi-Fi Direct related events.</li> <li><a 12 href="src/com/example/android/wifidirect/WiFiDirectBroadcastReceiver.html"><code> 13 WiFiDirectBroadcastReceiver</code></a> — a <code>BroadcastReceiver</code> 14 that listens for Wi-Fi Direct related events and passes them to 15 <code>WiFiDirectActivity</code> and it's fragments for neccesary action.</li> <li><a 16 href="src/com/example/android/wifidirect/DeviceListFragment.html"><code>DeviceListFragment</code></a> 17 — a <code>ListFragment</code> that displays available peers and their status. </li> 18<li><a href="src/com/example/android/wifidirect/DeviceDetailFragment.html"><code>DeviceDetailFragment</code></a> 19 — a <code>Fragment</code> that displays the details of the selected device and also drives the connection, disonnection and data transfer functionality of the demo. </li> 20<li><a href="src/com/example/android/wifidirect/FileTransferService.html"><code>FileTransferService</code></a> 21 — an <code>IntentService</code> that services file transfer requests from the application by using TCP sockets. </li> </ul> 22<p>If you are developing an application that uses the Wi-Fi Direct APIs, remember that the 23feature is supported only on Android 4.0 (API level 14) and higher versions of 24the platform. To ensure that your application can only 25be installed on devices that are capable of supporting Wi-Fi Direct mode, remember to add the 26following to the application's manifest before publishing to Google Play:</p> 27<ul> <li><code><uses-sdk android:minSdkVersion="14" /></code>, which 28 indicates to Google Play and the platform that your application requires 29 Android 4.0 or higher. For more information, see <a 30 href="../../../guide/appendix/api-levels.html">API Levels</a> and the 31 documentation for the <a 32 href="../../../guide/topics/manifest/uses-sdk-element.html"><code><uses-sdk></code></a> 33 element.</li> </ul> <p>To control how Google Play filters your application 34from devices that do not support Wi-Fi Direct mode, remember to add the following to the 35application's manifest <ul> <li><code><uses-feature 36 android:name="android.hardware.wifi.direct" /></code>, which tells Google 37 Play that your application uses the Wi-Fi Direct API. The declaration should include 38 an <code>android:required</code> attribute that indicates whether you want 39 Google Play to filter the application from devices that do not offer Wi-Fi Direct support. Other <code><uses-feature></code> declarations may also be 40 needed, depending on your implementation. For more information, see the 41 documentation for the <a 42 href="../../../guide/topics/manifest/uses-feature-element.html"><code><uses-feature></code></a> 43 element.</li> </ul> 44<p>For more information about using the Wi-Fi Direct API, see the <a 45 href="../../../reference/android/net/wifi/p2p/package-summary.html"><code>android.net.wifi.p2p </a></code> 46documentation. </p> 47 48<img alt="" src="../images/WifiDirect.png" /> 49 50
