android4.0 通过DHCP方式实现以太网连接
前段时间做了个厂家测试程序，中间有涉及到网口的检测。基于android4.0的以太网DHCP或者设置静态Ip来实现网络连接，主要实现过程如下：
一。DHCP动态获取ip实现网络连接
1.注册网络状态变化的广播接收：
private void registerEthernet() {
IntentFilter ethFilter = new IntentFilter(EthernetManager.ETHERNET_STATE_CHANGED_ACTION);
ethFilter.addAction(EthernetManager.NETWORK_STATE_CHANGED_ACTION);
registerReceiver(mEthConnectReceiver, ethFilter);
}
private BroadcastReceiver mEthConnectReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Log.d(TAG, " Ethernet onRecevice action = " + action);
if (action.equals(EthernetManager.ETHERNET_STATE_CHANGED_ACTION)) {
int msg = intent.getIntExtra(EthernetManager.EXTRA_ETHERNET_STATE, -1);
switch (msg) {
case EthernetDataTracker.EVENT_DHCP_CONNECT_FAILED:
break;
case EthernetDataTracker.EVENT_DHCP_DISCONNECT_FAILED:
break;
case EthernetDataTracker.EVENT_STATIC_CONNECT_FAILED:
break;
case EthernetDataTracker.EVENT_STATIC_DISCONNECT_FAILED:
break;
case EthernetDataTracker.EVENT_DHCP_CONNECT_SUCCESSED:
pingEthGateway(getEthGateWay());//ping命令DHCP连接网络是否成功
break;
case EthernetDataTracker.EVENT_DHCP_DISCONNECT_SUCCESSED:
break;
case EthernetDataTracker.EVENT_STATIC_CONNECT_SUCCESSED:
pingEthGateway(getEthGateWay());//ping命令测试静态IP连接网络是否成功
break;
case EthernetDataTracker.EVENT_STATIC_DISCONNECT_SUCCESSED:
break;
case EthernetDataTracker.EVENT_PHY_LINK_UP:
setDhcp();//网线插上后自己进行DHCP
break;
case EthernetDataTracker.EVENT_PHY_LINK_DOWN:
Log.d(TAG, "EVENT_PHY_LINK_DOWN ");//网线拔出
break;
default:
break;
}
}
}
};
2.通过DHCP实现网络连接
private String dhcp_gateway = null;
private String wifi_gateway = null;
private EthernetManager mEthManager = null;
private WifiManager mWifiManager = null;
private ConnectivityManager mConnectivityManager = null;
public void getInstance(Context context) {
mEthManager = (EthernetManager) context.getSystemService(Context.ETHERNET_SERVICE);
mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
mConnectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
}
public void setDhcp() {
mWifiManager.setWifiEnabled(false);//断开WIFI的连接
mEthManager.setEthernetEnabled(false);
Log.i(TAG, "getEthernetState=" + mEthManager.getEthernetState());
mEthManager.setEthernetDefaultConf();
mEthManager.setInterfaceName("eth0");
mEthManager.setEthernetEnabled(true);
Log.i(TAG, "getEthernetState=" + mEthManager.getEthernetState());
}
3.获取IP信息：
public String getEthGateWay() {
String ip = mConnectivityManager.getLinkProperties(ConnectivityManager.TYPE_ETHERNET)
.getAddresses().toString();
String mGW = mConnectivityManager.getLinkProperties(ConnectivityManager.TYPE_ETHERNET)
.getRoutes().toString();
String mDns = mConnectivityManager.getLinkProperties(ConnectivityManager.TYPE_ETHERNET)
.getDnses().toString();
Log.i(TAG, "getEthGateWay ip=" + ip);
Log.i(TAG, "getEthGateWay mGW=" + mGW);
Log.i(TAG, "getEthGateWay mDns=" + mDns);
if (mGW.contains(">")) {
mGW = mGW.substring(mGW.lastIndexOf('>') + 2, mGW.length() - 1);
}
dhcp_gateway = mGW;
return mGW;
}
其中获取的Ip信息为：
getEthGateWay ip=[/192.168.1.102]
getEthGateWay mGW=[0.0.0.0/0 -> 192.168.1.1]
getEthGateWay mDns=[/192.168.10.247, /192.168.1.1]
因此需要对网关信息进行处理。
4.Ping命令测试IP地址:
使用Root权限，通过JNI封装成一个系统库，调用exe command进行ping -c 4 -w 100 192.168.1.1测试。代码将不详细贴出。
执行结果：
I/SystemTestingJNI( 1836): executeCommand ret=0, result=PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
I/SystemTestingJNI( 1836): 64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=6.54 ms
I/SystemTestingJNI( 1836): 64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.316 ms
I/SystemTestingJNI( 1836): 64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.194 ms
I/SystemTestingJNI( 1836): 64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.255 ms
I/SystemTestingJNI( 1836):
I/SystemTestingJNI( 1836): --- 192.168.1.1 ping statistics ---
I/SystemTestingJNI( 1836): 4 packets transmitted, 4 received, 0% packet loss, time 3001ms
I/SystemTestingJNI( 1836): rtt min/avg/max/mdev = 0.194/1.826/6.542/2.723 ms
--还有一种方法，使用Runtime去ping,但是需要注意权限问题，以及输入输出流得自己处理。 exec执行时阻塞、非阻塞，返回结果问题
Process p= Runtime.getRuntime().exec(cmd);//String cmd
-------------------------------------------------------------------------------------------------------------------
二。通过设置静态IP连接网络：
public static void setStaticIp() {
mWifiManager.setWifiEnabled(false);
mEthManager.setEthernetEnabled(false);
DhcpInfoInternal mDhcpInfoInternal = new DhcpInfoInternal();
InetAddress iRoute = NetworkUtils.numericToInetAddress("192.168.1.103");
InetAddress iNetmask = NetworkUtils.numericToInetAddress("255.255.255.0");
try {
int netmask = NetworkUtils.inetAddressToInt(iNetmask);
int prefixLength = NetworkUtils.netmaskIntToPrefixLength(netmask);
mDhcpInfoInternal.prefixLength = prefixLength;
} catch (IllegalArgumentException e) {
e.printStackTrace();
}
mDhcpInfoInternal.ipAddress = "192.168.1.103";
mDhcpInfoInternal.addRoute(new RouteInfo(iRoute));
mDhcpInfoInternal.dns1 = "192.168.10.248";
mDhcpInfoInternal.serverAddress = "255.255.255.0";
mEthManager.saveEthernetIpInfo(mDhcpInfoInternal.makeDhcpInfo(),
EthernetManager.ETHERNET_CONNECT_MODE_MANUAL);
mEthManager.setEthernetEnabled(true);
DhcpInfo dhcpInfo = mEthManager.getSavedEthernetIpInfo();
dhcp_gateway = Formatter.formatIpAddress(dhcpInfo.gateway);
}
----通过网口实现网络连接实现，就此Ending。。------
DHCP详细代码：http://www.oschina.net/code/snippet_1051613_26563
配置工程中需要引用framework.jar,services.jar。
配置方法：
取到out\target\common\obj\JAVA_LIBRARIES\framework_intermediates\class.jar，然后放到本地，右击工程进入java build path ,通过add Library--user library ---添加刚取到的class.jar,取名为framewrok.最后调整Java build path 中的order and Export 将framework一直up到第一个。
取到out\target\common\obj\JAVA_LIBRARIES\services_intermediates\class.jar。方法同framework.
环境配置好后，重新Build。就不会有红叉叉了！！
WIFI文章：WIFI，热点扫描，配对，以及IP的获取。
http://my.oschina.net/hiliusl/blog/175605