时间:2021-02-16 10:44:08 | 栏目:Android代码 | 点击:次
下面给大家介绍Android 得到连接热点的ip的方法 ,具体代码如下所示:
WifiManager wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE); if (!wifiManager.isWifiEnabled()) { System.out.println("================="); wifiManager.setWifiEnabled(true); } WifiInfo wifiInfo = wifiManager.getConnectionInfo(); String IPAddress = intToIp(wifiInfo.getIpAddress()); System.out.println("IPAddress-->>" + IPAddress); DhcpInfo dhcpinfo = wifiManager.getDhcpInfo(); String serverAddress = intToIp(dhcpinfo.serverAddress); System.out.println("serverAddress-->>" + serverAddress);
其中IPAddress 是本机的IP地址,serverAddress 是你所连接的wifi热点对应的IP地址
private String intToIp(int paramInt) { return (paramInt & 0xFF) + "." + (0xFF & paramInt >> 8) + "." + (0xFF & paramInt >> 16) + "." + (0xFF & paramInt >> 24); }
当在Android设备终端上使用Wifi热点的时候,需要获知Wifi热点的运行状态,热点是否打开,连接到该WIFI热点的设备数量,以及连接设备的具体IP和MAC地址。
使用re文件管理器去"/proc/net/arp
",打开,发现连接上热点的设备信息都在这里了,包括mac ip等。
鉴于此,我们可以在代码中打开该文件,并获取WIFI热点的信息。
获取WIFI热点状态的方法getWifiApState()和判断热点是否可用的方法isApEnabled(),在Android源码WifiManager.Java中已经实现,但是它们是Hide方法,在SDK层面是不能访问的,如要访问需要用到java反射的机制。具体代码实现如下:
其中定义WIFI AP的几个状态
public static final int WIFI_AP_STATE_DISABLING = 10; public static final int WIFI_AP_STATE_DISABLED = 11; public static final int WIFI_AP_STATE_ENABLING = 12; public static final int WIFI_AP_STATE_ENABLED = 13; public static final int WIFI_AP_STATE_FAILED = 14;
对应于WifiMangaer.java中对这几个状态的定义。
获取WIFI热点的状态:
public int getWifiApState(Context mContext) { WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE); try { Method method = wifiManager.getClass().getMethod("getWifiApState"); int i = (Integer) method.invoke(wifiManager); Log.i(TAG,"wifi state: " + i); return i; } catch (Exception e) { Log.e(TAG,"Cannot get WiFi AP state" + e); return WIFI_AP_STATE_FAILED; } }
判断Wifi热点是否可用:
public boolean isApEnabled(Context mContext) { int state = getWifiApState(mContext); return WIFI_AP_STATE_ENABLING == state || WIFI_AP_STATE_ENABLED == state; }
获取链接到当前热点的设备IP:
private ArrayList<String> getConnectedHotIP() { ArrayList<String> connectedIP = new ArrayList<String>(); try { BufferedReader br = new BufferedReader(new FileReader( "/proc/net/arp")); String line; while ((line = br.readLine()) != null) { String[] splitted = line.split(" +"); if (splitted != null && splitted.length >= 4) { String ip = splitted[0]; connectedIP.add(ip); } } } catch (Exception e) { e.printStackTrace(); } return connectedIP; } //输出链接到当前设备的IP地址 public void printHotIp() { ArrayList<String> connectedIP = getConnectedHotIP(); StringBuilder resultList = new StringBuilder(); for (String ip : connectedIP) { resultList.append(ip); resultList.append("\n"); } System.out.print(resultList); Log.d(TAG,"---->>heww resultList="+resultList); }
当然在应用中要添加访问WIFI设备的权限:
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
否则将会提示如下错误:
Cannot get WiFi AP state
总结