android 8.1 framework层修改以太网静态ip功能

Android5.0基础上到Android7.0，Android都自带了以太网的设置功能，基本上都是将ip地址和网关之类的信息通过StaticIpConfiguration该对象实现联网功能。到了Android 8.1 如果还是照着7.0的来写，可能会出现配置了基本信息，却不能通过静态ip上网的情况。不要问我怎么知道的，因为我就是碰到这个 坑了。

 我默认你们已经知道怎么去实现设置ip的功能。在这个基础上，我们只需要修改一下framework层的代码就好。

设置静态ip的代码：

[code]Editor etherEditor = etherModePreferences.edit();
etherEditor.putString("ether_mode", "STATIC");
etherEditor.commit();
try {
StaticIpConfiguration staticIpConfiguration = new StaticIpConfiguration();
InetAddress mIpAddr = NetworkUtils.numericToInetAddress(mIpaddr.getText().toString());
String[] strs = mMask.getText().toString().split("\\.");
int count = 0;
for(String str : strs){
if(str.equals("255")){
count++;
}
}
int prefixLength = count*8;
LinkAddress mIpAddress = new LinkAddress(mIpAddr,prefixLength);
InetAddress mGateway = NetworkUtils.numericToInetAddress(mGw.getText().toString());
ArrayList<InetAddress> mDnsServers = new ArrayList<InetAddress>();
mDnsServers.add(NetworkUtils.numericToInetAddress(mDns1.getText().toString()));
mDnsServers.add(NetworkUtils.numericToInetAddress(mDns2.getText().toString()));

staticIpConfiguration.ipAddress = mIpAddress;
staticIpConfiguration.gateway = mGateway;
staticIpConfiguration.dnsServer
4000
s.addAll(mDnsServers);

config = new IpConfiguration(IpAssignment.STATIC, ProxySettings.NONE, staticIpConfiguration, ProxyInfo.buildDirectProxy(null,0));
mEthManager.setConfiguration(config);
}catch (Exception e) {
e.printStackTrace();
}

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 通过上面的代码可以把静态ip地址设置，但是你发现你只写了这写方法并不能用以太网实现联网功能。这个时候我们就需要修改

frameworks\opt\net\ethernet\java\com\android\server\ethernet目录下面的EthernetNetworkFactory文件，代码如下：

[code]public void startIpManager() {
if (DBG) {
Log.d(TAG, String.format("starting IpManager(%s): mNetworkInfo=%s", mIface,
mNetworkInfo));
}

LinkProperties linkProperties;

IpConfiguration config = mEthernetManager.getConfiguration();

if (config.getIpAssignment() == IpAssignment.STATIC) {
if (!setStaticIpAddress(config.getStaticIpConfiguration())) {
// We've already logged an error.
return;
}
linkProperties = config.getStaticIpConfiguration().toLinkProperties(mIface);
/*   } else {
mNetworkInfo.setDetailedState(DetailedState.OBTAINING_IPADDR, null, mHwAddr);
IpManager.Callback ipmCallback = new IpManager.Callback() {
@Override
public void onProvisioningSuccess(LinkProperties newLp) {
mHandler.post(() -> onIpLayerStarted(newLp));
}

@Override
public void onProvisioningFailure(LinkProperties newLp) {
mHandler.post(() -> onIpLayerStopped(newLp));
}

@Override
public void onLinkPropertiesChange(LinkProperties newLp) {
mHandler.post(() -> updateLinkProperties(newLp));
}
};

stopIpManager();
mIpManager = new IpManager(mContext, mIface, ipmCallback); */

if (config.getProxySettings() == ProxySettings.STATIC ||
config.getProxySettings() == ProxySettings.PAC) {
// mIpManager.setHttpProxy(config.getHttpProxy());
linkProperties.setHttpProxy(config.getHttpProxy());
}

/* final String tcpBufferSizes = mContext.getResources().getString(
com.android.internal.R.string.config_ethernet_tcp_buffers); */
String tcpBufferSizes = mContext.getResources().getString(
com.android.internal.R.string.config_ethernet_tcp_buffers);
/* if (!TextUtils.isEmpty(tcpBufferSizes)) {
mIpManager.setTcpBufferSizes(tcpBufferSizes);
} */
if (TextUtils.isEmpty(tcpBufferSizes) == false) {
linkProperties.setTcpBufferSizes(tcpBufferSizes);
}
} else {
mNetworkInfo.setDetailedState(DetailedState.OBTAINING_IPADDR, null, mHwAddr);
}
/*  final ProvisioningConfiguration provisioningConfiguration =
mIpManager.buildProvisioningConfiguration()
.withProvisioningTimeoutMs(0)
.build();
mIpManager.startProvisioning(provisioningConfiguration); */
// }
IpManager.Callback ipmCallback = new IpManager.Callback() {
@Override
public void onProvisioningSuccess(LinkProperties newLp) {
mHandler.post(() -> onIpLayerStarted(newLp));
}

@Override
public void onProvisioningFailure(LinkProperties newLp) {
mHandler.post(() -> onIpLayerStopped(newLp));
}

@Override
public void onLinkPropertiesChange(LinkProperties newLp) {
mHandler.post(() -> updateLinkProperties(newLp));
}
};
stopIpManager();
mIpManager = new IpManager(mContext, mIface, ipmCallback);

if (config.getProxySettings() == ProxySettings.STATIC ||
config.getProxySettings() == ProxySettings.PAC) {
mIpManager.setHttpProxy(config.getHttpProxy());
}

final String tcpBufferSizes = mContext.getResources().getString(
com.android.internal.R.string.config_ethernet_tcp_buffers);
if (!TextUtils.isEmpty(tcpBufferSizes)) {
mIpManager.setTcpBufferSizes(tcpBufferSizes);
}

if (config.getIpAssignment() == IpAssignment.STATIC) {
mIpManager.startProvisioning(config.getStaticIpConfiguration());
} else {
final ProvisioningConfiguration provisioningConfiguration =
mIpManager.buildProvisioningConfiguration()
.withProvisioningTimeoutMs(0)
.build();
mIpManager.startProvisioning(provisioningConfiguration);

}
}

通过设置修改以上代码就可以实现上网功能了。希望能对需要的人有用。