Gnod's Blog

Android Wifi Manager

WifiManager 获得：

WifiManager wifiMgr = (WifiManager) getSystemService(WIFI_SERVICE);

要求权限：android.permission.ACCESS_WIFI_STATE

连接信息获得：

  WifiInfo info = wifiMgr.getConnectionInfo();

  printLog("ip:" + intToIp(info.getIpAddress()));  // ip地址
  printLog("bssid:" + info.getBSSID());            // 连接路由器mac地址
  printLog("ssid:" + info.getSSID());              // 局域网标识
  printLog("mac Addr:" + info.getMacAddress());    // 手机mac地址
  printLog("network id:" + info.getNetworkId());   // 网络id
  printLog("rssi:" + info.getRssi());              // wifi信号强度
  • WifiManager 对于Rssi阀值控制如下：
  /** Anything worse than or equal to this will show 0 bars. */
  private static final int MIN_RSSI = -100;

  /** Anything better than or equal to this will show the max bars. */
  private static final int MAX_RSSI = -55;

DHCP信息获得：

  DhcpInfo dhcpInfo = wifiMgr.getDhcpInfo();

  printLog("ip Addr:" + intToIp(dhcpInfo.ipAddress));     // ip地址
  printLog("gateway:" + intToIp(dhcpInfo.gateway));       // 网关
  printLog("dns:" + intToIp(dhcpInfo.dns1) + "|" + intToIp(dhcpInfo.dns2));        // dns， dns2为备用dns
  printLog("server address:" + intToIp(dhcpInfo.serverAddress));      // 服务器ip

获得扫描到的Wifi信息：

  List<ScanResult> scanResult = wifiMgr.getScanResults();

一条ScalResult对应一个扫描到的Wifi热点，主要参数有：

SSID
DSSID
capabilities    热点安全描述
level           信号强弱
frequency       通信频率

获得连接管理对象ConnectivityManager

  ConnectivityManager connectionMgr = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);

网络状态信息获得：

  NetworkInfo networkInfo = connectionMgr.getActiveNetworkInfo();
  NetworkInfo wifiNetworkInfo = connectionMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
  NetworkInfo mobileNetworkInf = connectionMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

NetworkInfo 参数：

  printLog("详细状态:" + networkInfo.getDetailedState());
  printLog("附加信息:" + networkInfo.getExtraInfo());
  printLog("连接失败原因:" + networkInfo.getReason());
  printLog("网络类型及对应网络名称:" + networkInfo.getType() + " " + networkInfo.getTypeName());
  printLog("网络是否可用:" + networkInfo.isAvailable());
  printLog("网络已连接:" + networkInfo.isConnected());
  printLog("连接或正在连接中:" + networkInfo.isConnectedOrConnecting());
  printLog("是否连接失败:" + networkInfo.isFailover());
  printLog("是否处于漫游:" + networkInfo.isRoaming());

注册网络连接状态监听器：

  1. 实现BroadcastReceiver子类：
public class NetworkMonitor extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // do something here
    }
}
  1. 在AndroidManifest.xml中声明receiver:
<receiver android:name="com.gnod.demo.NetworkMonitor" android:label="NetworkMonitor">
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
        </intent-filter>
</receiver>

int类型ip转换：

  private String intToIp(int i) {
    return (i & 0xff) + "." + ((i>>8) & 0xff) + "." + ((i >> 16) & 0xff) + "." + ((i >>24) & 0xff);
	}
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Published

18 April 2014

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