下面是我已经用于创建Android的热点在code现在我想自动检测连接设备的IP

  //切换WiFi热点或关闭公共静态布尔configApState（上下文的背景下）{    WifiManager wifimanager =（WifiManager）context.getSystemService（context.WIFI_SERVICE）;    WifiConfiguration wificonfiguration = NULL;    尝试{        //如果WiFi是上，将其关闭        如果（isApOn（上下文））{            wifimanager.setWifiEnabled（假）;        }        方法方法= wifimanager.getClass（）实现getMethod（setWifiApEnabled，WifiConfiguration.class，boolean.class）。        method.invoke（wifimanager，wificonfiguration，isApOn（上下文）！）;        返回true;    }    赶上（例外五）{        e.printStackTrace（）;    }    返回false;} 

解决方案

您可以使用以下code得到conencted设备：

 公共无效getListOfConnectedDevice（）{线程线程=新主题（新的Runnable（）{    @覆盖    公共无效的run（）{        BR的BufferedReader = NULL;        布尔isFirstLine = TRUE;        尝试{            BR =新的BufferedReader（新的FileReader（的/ proc /净/ ARP））;            串线;            而（（行= br.readLine（））！= NULL）{                如果（isFirstLine）{                    isFirstLine = FALSE;                    继续;                }                串[]分裂= line.split（+）;                如果（分裂= NULL＆放大器;！＆安培; splitted.length＆GT; = 4）{                    串ip地址=分裂[0];                    串MACADDRESS =分裂[3];                    布尔isReachable = InetAddress.getByName（                            分裂[0]）isReachable（500）。 //这是网络调用，所以我们不能做，关于UI线程，所以我把后台线程。                    如果（isReachable）{                        Log.d（设备信息，ip地址+：                                + MACADDRESS）;                    }                }            }        }赶上（例外五）{            e.printStackTrace（）;        } {最后            尝试{                br.close（）;            }赶上（IOException异常五）{                e.printStackTrace（）;            }        }    }}）;thread.start（）;} 

来源：链接

Here is the code that i had used to create hotspot in android now i want to detect the ip of devices connected to it

// toggle wifi hotspot on or off
public static boolean configApState(Context context) {

    WifiManager wifimanager = (WifiManager) context.getSystemService(context.WIFI_SERVICE);
    WifiConfiguration wificonfiguration = null;
    try {  

        // if WiFi is on, turn it off
        if(isApOn(context)) {               
            wifimanager.setWifiEnabled(false);
        }               
        Method method = wifimanager.getClass().getMethod("setWifiApEnabled",  WifiConfiguration.class, boolean.class);                   
        method.invoke(wifimanager, wificonfiguration, !isApOn(context));
        return true;
    } 
    catch (Exception e) {

        e.printStackTrace();
    }       
    return false;
}

You can get the conencted devices using the following code:

public void getListOfConnectedDevice() {
Thread thread = new Thread(new Runnable() {

    @Override
    public void run() {
        BufferedReader br = null;
        boolean isFirstLine = true;

        try {
            br = new BufferedReader(new FileReader("/proc/net/arp"));
            String line;

            while ((line = br.readLine()) != null) {
                if (isFirstLine) {
                    isFirstLine = false;
                    continue;
                }

                String[] splitted = line.split(" +");

                if (splitted != null && splitted.length >= 4) {

                    String ipAddress = splitted[0];
                    String macAddress = splitted[3];

                    boolean isReachable = InetAddress.getByName(
                            splitted[0]).isReachable(500);  // this is network call so we cant do that on UI thread, so i take background thread.
                    if (isReachable) {
                        Log.d("Device Information", ipAddress + " : "
                                + macAddress);
                    }

                }

            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                br.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
});
thread.start();
}

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