android 获取连接WiFi的名称SSID

我们经常会用到wifi的定向连接，需要对连接的wifi名称进行判断

首先权限声明，在manifest中添加

java代码获取wifi名称

WifiManager wifiMgr = (WifiManager) mActivity.getSystemService(Context.WIFI_SERVICE);WifiInfo info = wifiMgr.getConnectionInfo();//输出字符串有双引号String wifiId = info != null ? info.getSSID() : null;

wifi连接IP地址获取及wifi是否正常使用

public static InetAddress getWifiIp() {        Context myContext = Globals.getContext();        if (myContext == null) {            throw new NullPointerException("Global context is null");        }        WifiManager wifiMgr = (WifiManager) myContext.getSystemService(Context.WIFI_SERVICE);        if (isWifiEnabled()) {            int ipAsInt = wifiMgr.getConnectionInfo().getIpAddress();            if (ipAsInt == 0) {                return null;            } else {                return Util.intToInet(ipAsInt);            }        } else {            return null;        }    }  　　// 取得wifi的ip地址　　InetAddress address = FTPServerService.getWifiIp();　　address.getHostAddress();　　public static boolean isWifiEnabled() {        Context myContext = Globals.getContext();        if (myContext == null) {            throw new NullPointerException("Global context is null");        }        WifiManager wifiMgr = (WifiManager) myContext.getSystemService(Context.WIFI_SERVICE);        if (wifiMgr.getWifiState() == WifiManager.WIFI_STATE_ENABLED) {            ConnectivityManager connManager = (ConnectivityManager) myContext                    .getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo wifiInfo = connManager                    .getNetworkInfo(ConnectivityManager.TYPE_WIFI);            return wifiInfo.isConnected();        } else {            return false;        }    }

补充跳转wifi设置界面intent

Intent intent = new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS);startActivity(intent);

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