Obtain the mac ip address in Android

/**

* If WiFi is not enabled, you can still obtain the MAC address, but the IP address must be in the connected status or 0

*

* @ Param Context

*/

Public
Static void getmacaddress (context ){

String macaddress =
Null, IP = NULL;

Wifimanager wifimgr = (wifimanager) Context

. Getsystemservice (context. wifi_service );

Wifiinfo info = (null = wifimgr?
Null: wifimgr. getconnectioninfo ());

If (null! = Info ){

Macaddress = info. getmacaddress ();

//
IP = int2ip (info. getipaddress ());

}

System. Out. println ("Mac:" + macaddress +
", IP:" + IP );

}

/**

* Principle: each segment of an IP address can be regarded as an 8-bit unsigned integer (0-255). Each segment is split into a binary array, then convert the binary number into an unsigned 32 as an integer.

* Example: an IP address is 10.0.3.193. The number of binary numbers corresponding to each segment is 10 00001010 0 00000000 3 00000011 193

* 11000001 combination: 00001010 00000000 00000011

* 11000001, which is converted to decimal: 167773121, that is, the number after the IP address is converted to decimal.

*

* @ Param IP

* @ Return

*/

Public
Static long ip2int (string IP ){

String [] items = IP. Split ("\\.");

Return long. valueof (items [0]) <24 | long. valueof (items [1]) <16

| Long. valueof (items [2]) <8 | long. valueof (items [3]);

}

/**

* Principle: convert this integer into a 32-bit binary number. Split each eight bits from left to right to get the 4-Segment 8-bit binary number. convert these binary numbers into integers and then add "."

* This is the IP address. For example, the 167773121 binary representation is 00001010 00000000 00000011 11000001.

* Split it into four segments:, and. Then, convert them into integers and add "." To 10.0.3.193.

*

* @ Param ipint

* @ Return

*/

Public
Static string int2ip (long ipint ){

Stringbuilder sb =
New stringbuilder ();

SB. append (ipint & 0xff). append (".");

SB. append (ipint> 8) & 0xff). append (".");

SB. append (ipint> 16) & 0xff). append (".");

SB. append (ipint> 24) & 0xff );

Return sb. tostring ();

}