Android wifi开发

来源：互联网发布：附近陌生人聊天软件编辑：程序博客网时间：2024/05/22 23:27

这里给出一篇基本的wifi开发流程，希望对涉及到利用wifi进行网络传输的应用有一定帮助

1 AndroidManifest.xml中配置

    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" >    </uses-permission>    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" >    </uses-permission>    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" >    </uses-permission>    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" >    </uses-permission>    <uses-permission android:name="android.permission.UPDATE_DEVICE_STATS" >    </uses-permission>    <uses-permission android:name="android.permission.INTERNET" >    </uses-permission>

2 获取wifi服务，并开启wifi

if (wifiManager == null)    wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);if (!wifiManager.isWifiEnabled()) {    wifiManager.setWifiEnabled(true);}

3 注册wifi扫描监听器，并开始扫描

wifiNames = new ArrayList<String>();wifiDevices = new ArrayList<WifiConfiguration>();registerReceiver(wifiReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));wifiManager.startScan();

4 wifi扫描监听器

private final BroadcastReceiver wifiReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {List<WifiConfiguration> wcList = wifiManager.getConfiguredNetworks();WifiConfiguration wc = null;wifiNames.clear();wifiDevices.clear();for (int i = 0, len = wcList.size(); i < len; i++) {wc = wcList.get(i);if (!wifiNames.contains(wc.SSID)) {wifiNames.add(wc.SSID);wifiDevices.add(wc);}}};

5 获取到周围wifi列表后，让手机连上该wifi。（对wifi的连接我没有做具体的测试，希望对这段代码有问题的朋友可以给出评论）

WifiConfiguration wc = wifiDevices.get(index);int resId = wifiManager.addNetwork(wc);boolean isSucc = wifiManager.enableNetwork(resId, true);isSucc = wifiManager.reassociate();

6 获取本机的IP地址，通过网上提供的一个方法获取，不过似乎不是十分的准确

public String getLocalIpAddress() {try {for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {NetworkInterface intf = en.nextElement();for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {InetAddress inetAddress = enumIpAddr.nextElement();if (!inetAddress.isLoopbackAddress()) {return inetAddress.getHostAddress().toString();}}}} catch (SocketException ex) {Log.e(TAG, ex.toString());}return null;}

7 连接到wifi后，通过本机IP地址便可以进行相关网络开发