Android下用代码设置静态IP地址的方法（完美支持Android2.X，Android3.X，Android4.X）

有一个项目，要控制设备wifi连接，而且要使用静态ip，上网查找了下，基本都是Android2.X下面的方法，即使用Settings进行设置，但是这种设置方法对于Android3.X以上设备是无效的，通过研究在Android手机上手动设置静态ip，我们可以发现：

     1、Android2.X系统下面，静态IP地址是一个全局设置，即设置好之后会对你以后连接的所有热点生效，都会使用你设置的IP地址

     2、Android3.X以上系统，设置静态ip是针对每一个点连接的配置进行的，在热点1上的设置不会影响热点2

 

     ok，基本明白了，Android2.X使用Settings进行设置，是一个全局设定，而之后的系统做了修改，更改了设置模式，将静态ip设置与每一个热点挂钩，那会不会是在热点的配置类里面实现的呢，为了验证，我们查看了Android4.0的sdk源码，分析完WifiConfiguration.java后，就明白了，里面有“ipAssignment”，“linkProperties”，"mRoutes"(3.x系统为“mGateways”)等多个新增的hidden项，看来只能通过反射的方法调用了，呵呵，下面上代码：

 

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01.//******************************************************************************/ 

02.    //以下代码为android3.0及以上系统设置静态ip地址的方法 

 

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01.  

 

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01./*设置ip地址类型 assign：STATIC/DHCP 静态/动态*/ 

 

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01.    private static void setIpAssignment(String assign, WifiConfiguration wifiConf) 

02.        throws SecurityException, IllegalArgumentException, 

03.        NoSuchFieldException, IllegalAccessException { 

04.    setEnumField(wifiConf, assign, "ipAssignment"); 

05.} 

06. 
07.@SuppressWarnings("unchecked") 

 

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01./*设置ip地址*/ 

 

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01.    private static void setIpAddress(InetAddress addr, int prefixLength, 

02.            WifiConfiguration wifiConf) throws SecurityException, 

03.            IllegalArgumentException, NoSuchFieldException, 

04.            IllegalAccessException, NoSuchMethodException, 

05.            ClassNotFoundException, InstantiationException, 

06.            InvocationTargetException { 

07.        Object linkProperties = getField(wifiConf, "linkProperties"); 

08.        if (linkProperties == null) 

09.            return; 

10.        Class<?> laClass = Class.forName("android.net.LinkAddress"); 

11.        Constructor<?> laConstructor = laClass.getConstructor(new Class[] { 

12.                InetAddress.class, int.class }); 

13.        Object linkAddress = laConstructor.newInstance(addr, prefixLength); 

14. 

15.        ArrayList<Object> mLinkAddresses = (ArrayList<Object>) getDeclaredField( 

16.                linkProperties, "mLinkAddresses"); 

17.        mLinkAddresses.clear(); 

18.        mLinkAddresses.add(linkAddress); 

19.    } 

20. 

21.        @SuppressWarnings("unchecked")<pre class="java" name="code">        /*设置网关*/ 

22.    private static void setGateway(InetAddress gateway, 

23.            WifiConfiguration wifiConf) throws SecurityException, 

24.            IllegalArgumentException, NoSuchFieldException, 

25.            IllegalAccessException, ClassNotFoundException, 

26.            NoSuchMethodException, InstantiationException, 

27.            InvocationTargetException { 

28.        Object linkProperties = getField(wifiConf, "linkProperties"); 

29.        if (linkProperties == null) 

30.            return; 

31. 

32.        if (android.os.Build.VERSION.SDK_INT >= 14) { // android4.x版本 

33.            Class<?> routeInfoClass = Class.forName("android.net.RouteInfo"); 

34.            Constructor<?> routeInfoConstructor = routeInfoClass 

35.                    .getConstructor(new Class[] { InetAddress.class }); 

36.            Object routeInfo = routeInfoConstructor.newInstance(gateway); 

37. 

38.            ArrayList<Object> mRoutes = (ArrayList<Object>) getDeclaredField( 

39.                    linkProperties, "mRoutes"); 

40.            mRoutes.clear(); 

41.            mRoutes.add(routeInfo); 

42.        } else { // android3.x版本 

43.            ArrayList<InetAddress> mGateways = (ArrayList<InetAddress>) getDeclaredField( 

44.                    linkProperties, "mGateways"); 

45.            mGateways.clear(); 

46.            mGateways.add(gateway); 

47.        } 

48. 

49.    } 

50.     

51. 

52.        @SuppressWarnings("unchecked")<pre class="java" name="code">        /*设置域名解析服务器*/ 

53.</pre> private static void setDNS(InetAddress dns, WifiConfiguration wifiConf)throws SecurityException, IllegalArgumentException,NoSuchFieldException, IllegalAccessException 

54. {Object linkProperties = getField(wifiConf, "linkProperties");if (linkProperties == null)return;ArrayList<InetAddress> mDnses = (ArrayList<InetAddress>) getDeclaredField(linkProperties, "mDnses");mDnses.clear(); // 清除原有DNS设置（如果只想增加，不想清除，词句可省略）mDnses.add(dns); 

55. //增加新的DNS}private static Object getField(Object obj, String name)throws SecurityException, NoSuchFieldException,IllegalArgumentException, IllegalAccessException {Field f = obj.getClass().getField(name);Object out = f.get(obj);return out;}private static
Object 

56. getDeclaredField(Object obj, String name)throws SecurityException, NoSuchFieldException,IllegalArgumentException, IllegalAccessException {Field f = obj.getClass().getDeclaredField(name);f.setAccessible(true);Object out = f.get(obj);return out;}@SuppressWarnings({ 

57. "unchecked", "rawtypes" })private static void setEnumField(Object obj, String value, String name)throws SecurityException, NoSuchFieldException,IllegalArgumentException, IllegalAccessException {Field f = obj.getClass().getField(name);f.set(obj, Enum.valueOf((Class<Enum>) 

58. f.getType(), value));} //***以上是android3.x以上设置静态ip地址的方法********************************************************************************* 

59.<pre></pre> 

60.<pre></pre> 

61.<p><br> 

62. </p> 

63.<p>下面是调用方法：</p> 

64.<pre class="java" name="code"><p> </p><pre class="java" name="code">   private void setIpWithTfiStaticIp() { 

65. 

66.        WifiConfiguration wifiConfig; 

67. 

68.        WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 

69.        WifiInfo connectionInfo = wifiManager.getConnectionInfo(); 

70.        List<WifiConfiguration> configuredNetworks = wifiManager 

71.                .getConfiguredNetworks(); 

72.        for (WifiC
4000
onfiguration conf : configuredNetworks) { 

73.            if (wifiConf.networkId == connectionInfo.getNetworkId()) { 

74.                WifiConf = conf; 

75.                break; 

76.            } 

77.        } 

78. 

79.        if (android.os.Build.VERSION.SDK_INT < 11) { // 如果是android2.x版本的话 

80. 

81.            ContentResolver ctRes = context.getContentResolver(); 

82.            Settings.System 

83.                    .putInt(ctRes, Settings.System.WIFI_USE_STATIC_IP, 1); 

84.            Settings.System.putString(ctRes, Settings.System.WIFI_STATIC_IP, 

85.                    "192.168.0.202"); 

86.            Settings.System.putString(ctRes, 

87.                    Settings.System.WIFI_STATIC_NETMASK, "255.255.255.0"); 

88.            Settings.System.putString(ctRes, 

89.                    Settings.System.WIFI_STATIC_GATEWAY, "192.168.0.1"); 

90.            Settings.System.putString(ctRes, Settings.System.WIFI_STATIC_DNS1, 

91.                    "192.168.0.1"); 

92.            Settings.System.putString(ctRes, Settings.System.WIFI_STATIC_DNS2, 

93.                    "61.134.1.9"); 

94. 

95.        } else { // 如果是android3.x版本及以上的话 

96.            try { 

97.                setIpAssignment("STATIC", wifiConfig); 

98.                setIpAddress(InetAddress.getByName("192.168.0.202"), 24, 

99.                        wifiConfig); 

100.                setGateway(InetAddress.getByName("192.168.0.1"), wifiConfig); 

101.                setDNS(InetAddress.getByName("192.168.0.1"), wifiConfig); 

102.                wifiManager.updateNetwork(wifiConfig); // apply the setting 

103.                System.out.println("静态ip设置成功！"); 

104.            } catch (Exception e) { 

105.                e.printStackTrace(); 

106.                System.out.println("静态ip设置失败！"); 

107.            } 

108.        } 

109. 

110.    }</pre>