【移動應(yīng)用開發(fā)技術(shù)】Android 中怎么獲取連接熱點的ip

【移動應(yīng)用開發(fā)技術(shù)】Android中怎么獲取連接熱點的ip

Android中怎么獲取連接熱點的ip，相信很多沒有經(jīng)驗的人對此束手無策，為此本文總結(jié)了問題出現(xiàn)的原因和解決方法，通過這篇文章希望你能解決這個問題。具體代碼如下所示：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是本機的IP地址，serverAddress是你所連接的wifi熱點對應(yīng)的IP地址

private

String

intToIp(int

paramInt)

{

return

(paramInt

&

0xFF)

+

"."

+

(0xFF

&

paramInt

>>

8)

+

"."

+

(0xFF

&

paramInt

>>

16)

+

"."

+

(0xFF

&

paramInt

>>

24);

}當(dāng)在Android設(shè)備終端上使用Wifi熱點的時候，需要獲知Wifi熱點的運行狀態(tài)，熱點是否打開，連接到該WIFI熱點的設(shè)備數(shù)量，以及連接設(shè)備的具體IP和MAC地址。使用re文件管理器去"/proc/net/arp"，打開，發(fā)現(xiàn)連接上熱點的設(shè)備信息都在這里了，包括macip等。鑒于此，我們可以在代碼中打開該文件，并獲取WIFI熱點的信息。獲取WIFI熱點狀態(tài)的方法getWifiApState()和判斷熱點是否可用的方法isApEnabled()，在Android源碼WifiManager.Java中已經(jīng)實現(xiàn)，但是它們是Hide方法，在SDK層面是不能訪問的，如要訪問需要用到j(luò)ava反射的機制。具體代碼實現(xiàn)如下：其中定義WIFIAP的幾個狀態(tài)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;對應(yīng)于WifiMangaer.java中對這幾個狀態(tài)的定義。

獲取WIFI熱點的狀態(tài)：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;

}

}判斷Wifi熱點是否可用：

public

boolean

isApEnabled(Context

mContext)

{

int

state

=

getWifiApState(mContext);

return

WIFI_AP_STATE_ENABLING

==

state

||

WIFI_AP_STATE_ENABLED

==

state;

}獲取鏈接到當(dāng)前熱點的設(shè)備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;

}

//輸出鏈接到當(dāng)前設(shè)備的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