我想获取IP地址。使用该 IP 地址必须检测连接到特定网络/设备的所有设备。并且应该能够获得 MAC 地址？
tv=(TextView)findViewById(R.id.tv);
wifi=(WifiManager)getSystemService(WIFI_SERVICE) ;
btn=(Button)findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
InetAddress inet=InetAddress.getLocalHost();
Toast.makeText(getApplicationContext(),inet.toString(),Toast.LENGTH_LONG).show();
} catch (Exception e) {
System.out.println(" ");
}
如果您想检测连接到任何网络的“模拟器”或 android 设备的 IP 地址，请在您的程序中使用此代码。它将为您提供网络分配给您设备的确切 IP 地址。
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("ServerActivity", ex.toString());
}
我们可以使用 Wifi manager 类来获取设备的 IP 地址：
在清单中添加“ACCESS_WIFI_STATE”权限
WifiManager myWifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE);
WifiInfo myWifiInfo = myWifiManager.getConnectionInfo();
//gets the Ip address in hex form, We need to convert it to integer and then finally to string to display it
int myIp = myWifiInfo.getIpAddress();
int intMyIp3 = myIp/0x1000000;
int intMyIp3mod = myIp%0x1000000;
int intMyIp2 = intMyIp3mod/0x10000;
int intMyIp2mod = intMyIp3mod%0x10000;
int intMyIp1 = intMyIp2mod/0x100;
int intMyIp0 = intMyIp2mod%0x100;
t3.setText(String.valueOf(intMyIp0) + "." + String.valueOf(intMyIp1)
+ "." + String.valueOf(intMyIp2)
+ "." + String.valueOf(intMyIp3)
);