效果图
一、Settings添加以太网的配置：
1、vendor\mediatek\proprietary\packages\apps\MtkSettings\res\xml\network_and_internet.xml
<com.android.settingslib.RestrictedPreference
android:key="ethernet_settings"
android:title="@string/ethernet_settings_title"
android:summary="@string/summary_placeholder"
android:icon="@drawable/ic_ethernet_cell"
android:fragment="com.android.settings.ethernet.EthernetSettings"
android:order="-17"/>
在 mobile_network_settings 和 tether_settings 之间增加如上代码，
对应的 icon 资源文件是我从 SystemUI 中拷贝过来的，稍微调整了下大小，也贴给你们吧
2、vendor\mediatek\proprietary\packages\apps\MtkSettings\res\drawable\ic_ethernet_cell.xml
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:autoMirrored="true"
android:width="24dp"
android:height="24dp"
android:viewportWidth="48"
android:viewportHeight="48"
android:tint="?android:attr/colorControlNormal">
<path
android:fillColor="#fff"
android:pathData="M15.54 13.52l-3.08-2.55L1.64 24l10.82 13.04 3.08-2.55L6.84 24l8.7-10.48zM14 26h4v-4h-4v4zm20-4h-4v4h4v-4zm-12 4h4v-4h-4v4zm13.54-15.04l-3.08 2.55L41.16 24l-8.7 10.48 3.08 2.55L46.36 24 35.54 10.96z"/>
</vector>
vendor\mediatek\proprietary\packages\apps\MtkSettings\res\values\strings.xml
<string name="ethernet_ip_settings_invalid_ip">"Please fill in the correct format."</string>
<string name="eth_ip_settings_please_complete_settings">"Network information is not complete, please fill in the complete"</string>
<string name="save_satic_ethernet">"Save"</string>
<string name="enthernet_static">"Use static settings"</string>
<string name="enthernet_ip_address">"IP address"</string>
<string name="enthernet_gateway">"gateway"</string>
<string name="enthernet_netmask">"Subnet mask"</string>
<string name="enthernet_dns1">"domain1"</string>
<string name="enthernet_dns2">"domain2"</string>
<string name="ethernet_quick_toggle_title">"Ethernet"</string>
<string name="open_ethernet">"Open Ethernet"</string>
<string name="ethernet_static_ip_settings_title">"Setting Ethernet"</string>
<string name="ethernet_settings">"Ethernet"</string>
<string name="ethernet_settings_title">"Ethernet"</string>
vendor\mediatek\proprietary\packages\apps\MtkSettings\res\values-zh-rCN\strings.xml
<string name="ethernet_ip_settings_invalid_ip">"请填写正确的格式"</string>
<string name="save_satic_ethernet">"保存"</string>
<string name="eth_ip_settings_please_complete_settings">"网络信息不完整，请填写完整"</string>
<string name="enthernet_static">"使用静态设置"</string>
<string name="enthernet_ip_address">"IP地址"</string>
<string name="enthernet_gateway">"网关"</string>
<string name="enthernet_netmask">"子网掩码"</string>
<string name="enthernet_dns1">"域名1"</string>
<string name="enthernet_dns2">"域名2"</string>
<string name="ethernet_quick_toggle_title">"以太网"</string>
<string name="open_ethernet">"打开以太网"</string>
<string name="ethernet_static_ip_settings_title">"配置以太网"</string>
<string name="ethernet_settings">"以太网"</string>
<string name="ethernet_settings_title">"以太网"</string>
3、增加对应设置的两个布局xml
vendor\mediatek\proprietary\packages\apps\MtkSettings\res\xml\ethernet_settings.xml
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
android:title="@string/ethernet_settings">
<SwitchPreference
android:key="ethernet"
android:title="@string/ethernet_quick_toggle_title"
android:summary="@string/open_ethernet"/>
<PreferenceScreen
android:dependency="ethernet"
android:fragment="com.android.settings.ethernet.EthernetStaticIP"
android:key="ethernet_static_ip"
android:title="@string/ethernet_static_ip_settings_title" />
</PreferenceScreen>
vendor\mediatek\proprietary\packages\apps\MtkSettings\res\xml\ethernet_static_ip.xml
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
android:title="@string/ethernet_static_ip_settings_title">
<SwitchPreference
android:key="use_static_ip"
android:title="@string/enthernet_static"
android:persistent="false"/>
<EditTextPreference
android:dependency="use_static_ip"
android:key="ip_address"
android:title="@string/enthernet_ip_address"
android:persistent="false"
android:singleLine="true"/>
<EditTextPreference
android:dependency="use_static_ip"
android:key="gateway"
android:title="@string/enthernet_gateway"
android:persistent="false"
android:singleLine="true"/>
<EditTextPreference
android:dependency="use_static_ip"
android:key="netmask"
android:title="@string/enthernet_netmask"
android:persistent="false"
android:singleLine="true" />
<EditTextPreference
android:dependency="use_static_ip"
android:key="dns1"
android:title="@string/enthernet_dns1"
android:persistent="false"
android:singleLine="true"/>
<EditTextPreference
android:dependency="use_static_ip"
android:key="dns2"
android:title="@string/enthernet_dns2"
android:persistent="false"
android:singleLine="true"/>
</PreferenceScreen>
4、增加对应两个布局的 java 控制类
vendor\mediatek\proprietary\packages\apps\MtkSettings\src\com\android\settings\ethernet\EthernetSettings.java
package com.android.settings.ethernet;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.BroadcastReceiver;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Build;
import android.os.Bundle;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceGroup;
import android.support.v7.preference.PreferenceScreen;
import android.support.v7.preference.CheckBoxPreference;
import android.support.v14.preference.SwitchPreference;
import android.provider.Settings;
import android.provider.Settings.System;
import android.provider.Settings.Secure;
import android.util.Log;
import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.net.InetAddress;
import android.net.EthernetManager;
import android.net.StaticIpConfiguration;
import android.net.LinkAddress;
import android.net.IpConfiguration;
import com.android.settings.SettingsPreferenceFragment;
import com.android.settings.R;
public class EthernetSettings extends SettingsPreferenceFragment
implements Preference.OnPreferenceChangeListener{
private static final String TAG = "EthernetSettings";
private static final String USE_ETHERNET_SETTINGS = "ethernet";
public static final String IS_ETHERNET_OPEN = Settings.IS_ETHERNET_OPEN;
private SwitchPreference mUseEthernet;
private IntentFilter mIntentFilter;
private boolean isEthernetEnabled() {
return Settings.System.getInt(getActivity().getContentResolver(), IS_ETHERNET_OPEN,0) == 1 ? true : false;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.ethernet_settings);
mUseEthernet = (SwitchPreference) findPreference(USE_ETHERNET_SETTINGS);
mUseEthernet.setOnPreferenceChangeListener(this);
if(isEthernetEnabled()) {
mUseEthernet.setChecked(true);
} else {
mUseEthernet.setChecked(false);
}
File f = new File("sys/class/net/eth0/address");
if (f.exists()) {
mUseEthernet.setEnabled(true);
} else {
mUseEthernet.setEnabled(false);
}
}
@Override
public void onResume() {
super.onResume();
}
@Override
public int getMetricsCategory(){return MetricsEvent.ETHERNET;}
@Override
public void onPause() {
super.onPause();
}
@Override
public boolean onPreferenceChange(Preference preference, Object value) {
boolean result = true;
final String key = preference.getKey();
if (USE_ETHERNET_SETTINGS.equals(key)) {
Settings.System.putInt(getActivity().getContentResolver(), IS_ETHERNET_OPEN,
((Boolean) value) ? 1 : 0);
}
return result;
}
}
vendor\mediatek\proprietary\packages\apps\MtkSettings\src\com\android\settings\ethernet\EthernetStaticIP.java
package com.android.settings.ethernet;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.ContentResolver;
import android.os.Bundle;
import android.support.v7.preference.Preference;
import android.preference.PreferenceActivity;
import android.support.v7.preference.PreferenceScreen;
import android.support.v7.preference.CheckBoxPreference;
import android.support.v7.preference.EditTextPreference;
import android.support.v14.preference.SwitchPreference;
import android.provider.Settings;
import android.provider.Settings.Secure;
import android.util.Log;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.AdapterView;
import android.widget.Toast;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.text.TextUtils;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.Formatter;
import java.net.InetAddress;
import android.net.EthernetManager;
import android.net.StaticIpConfiguration;
import android.net.LinkAddress;
import android.net.IpConfiguration;
import android.net.IpConfiguration.IpAssignment;
import android.net.IpConfiguration.ProxySettings;
import android.net.NetworkInfo.DetailedState;
import android.content.BroadcastReceiver;
import android.content.IntentFilter;
import android.content.Context;
import android.net.NetworkInfo;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.app.AlertDialog;
import com.android.settings.SettingsPreferenceFragment;
import com.android.settings.R;
import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
public class EthernetStaticIP extends SettingsPreferenceFragment
implements Preference.OnPreferenceChangeListener {
private static final String TAG = "EthernetStaticIP";
public static final boolean DEBUG = false;
private static void LOG(String msg) {
if ( DEBUG ) {
Log.d(TAG, msg);
}
}
/*-------------------------------------------------------*/
private static final String KEY_USE_STATIC_IP = "use_static_ip";
private static final String KEY_IP_ADDRESS = "ip_address";
private static final String KEY_GATEWAY = "gateway";
private static final String KEY_NETMASK = "netmask";
private static final String KEY_DNS1 = "dns1";
private static final String KEY_DNS2 = "dns2";
public static final String ETHERNET_USE_STATIC_IP = Settings.IS_ETHERNET_STATUC_OPEN;
private static final int MENU_ITEM_SAVE = Menu.FIRST;
private static final int MENU_ITEM_CANCEL = Menu.FIRST + 1;
private String[] mSettingNames = {
Settings.ETHERNET_STATIC_IP,
Settings.ETHERNET_STATIC_GATEWAY,
Settings.ETHERNET_STATIC_NETMASK,
Settings.ETHERNET_STATIC_DNS1,
Settings.ETHERNET_STATIC_DNS2
};
private String[] mPreferenceKeys = {
KEY_IP_ADDRESS,
KEY_GATEWAY,
KEY_NETMASK,
KEY_DNS1,
KEY_DNS2,
};
/*-------------------------------------------------------*/
private SwitchPreference mUseStaticIpSwitch;
private StaticIpConfiguration mStaticIpConfiguration;
private IpConfiguration mIpConfiguration;
private EthernetManager mEthernetManager;
private boolean isOnPause = false;
private boolean chageState = false;
public EthernetStaticIP() {
}
@Override
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
addPreferencesFromResource(R.xml.ethernet_static_ip);
mUseStaticIpSwitch = (SwitchPreference)findPreference(KEY_USE_STATIC_IP);
mUseStaticIpSwitch.setOnPreferenceChangeListener(this);
for ( int i = 0; i < mPreferenceKeys.length; i++ ) {
Preference preference = findPreference(mPreferenceKeys[i] );
preference.setOnPreferenceChangeListener(this);
}
setHasOptionsMenu(true);
}
@Override
public void onResume() {
super.onResume();
if(!isOnPause) {
updateIpSettingsInfo();
}
isOnPause = false;
}
@Override
public int getMetricsCategory(){return MetricsEvent.ETHERNET_STATIC;}
@Override
public void onPause() {
isOnPause = true;
super.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
menu.add(Menu.NONE, MENU_ITEM_SAVE, 0, R.string.save_satic_ethernet)
.setEnabled(true)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case MENU_ITEM_SAVE:
saveIpSettingsInfo();
if(isIpDataInUiComplete())
finish();
return true;
case MENU_ITEM_CANCEL:
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
private void updateIpSettingsInfo() {
LOG("Static IP status updateIpSettingsInfo");
ContentResolver contentResolver = getContentResolver();
mUseStaticIpSwitch.setChecked(Settings.System.getInt(contentResolver, ETHERNET_USE_STATIC_IP, 0) != 0);
for (int i = 0; i < mSettingNames.length; i++) {
EditTextPreference preference = (EditTextPreference) findPreference(mPreferenceKeys[i]);
String settingValue = Settings.System.getString(contentResolver, mSettingNames[i]);
preference.setText(settingValue);
preference.setSummary(settingValue);
}
}
private void saveIpSettingsInfo() {
ContentResolver contentResolver = getContentResolver();
/*
if(!chageState)
return;
*/
if(!isIpDataInUiComplete())
{
Toast.makeText(getActivity(), R.string.eth_ip_settings_please_complete_settings, Toast.LENGTH_LONG).show();
return;
}
mIpConfiguration = new IpConfiguration();
mStaticIpConfiguration = new StaticIpConfiguration();
for (int i = 0; i < mSettingNames.length; i++) {
EditTextPreference preference = (EditTextPreference) findPreference(mPreferenceKeys[i]);
String text = preference.getText();
try {
switch (mPreferenceKeys[i]) {
case KEY_IP_ADDRESS:
mStaticIpConfiguration.ipAddress = new LinkAddress(InetAddress.getByName(text), 24);
break;
case KEY_GATEWAY:
mStaticIpConfiguration.gateway = InetAddress.getByName(text);
break;
case KEY_NETMASK:
mStaticIpConfiguration.domains = text;
break;
case KEY_DNS1:
mStaticIpConfiguration.dnsServers.add(InetAddress.getByName(text));
break;
case KEY_DNS2:
mStaticIpConfiguration.dnsServers.add(InetAddress.getByName(text));
break;
}
} catch (Exception e) {
e.printStackTrace();
}
if ( null == text || TextUtils.isEmpty(text) ) {
Settings.System.putString(contentResolver, mSettingNames[i], null);
}
else {
Settings.System.putString(contentResolver, mSettingNames[i], text);
}
}
mIpConfiguration.ipAssignment = IpAssignment.STATIC;
mIpConfiguration.proxySettings = ProxySettings.STATIC;
mIpConfiguration.staticIpConfiguration = mStaticIpConfiguration;
mEthernetManager = (EthernetManager) getSystemService(Context.ETHERNET_SERVICE);
if (mUseStaticIpSwitch.isChecked())
mEthernetManager.setConfiguration(mIpConfiguration);
Settings.System.putInt(contentResolver,ETHERNET_USE_STATIC_IP, mUseStaticIpSwitch.isChecked() ? 1 : 0);
// disable ethernet
boolean enable = Secure.getInt(getContentResolver(), "isEnthernetOn", 1) == 1;
LOG("notify Secure.ETHERNET_ON changed. enable = " + enable);
if(enable) {
LOG("first disable");
Secure.putInt(getContentResolver(), "isEnthernetOn", 0);
try {
Thread.sleep(500);
} catch (InterruptedException e) {}
LOG("second enable");
Secure.putInt(getContentResolver(), "isEnthernetOn", 1);
}
}
@Override
public boolean onPreferenceTreeClick(Preference preference) {
boolean result = true;
LOG("onPreferenceTreeClick() chageState = " + chageState);
chageState = true;
return result;
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
boolean result = true;
String key = preference.getKey();
LOG("onPreferenceChange() : key = " + key);
if ( null == key ) {
return true;
}else if (key.equals(KEY_USE_STATIC_IP)) {
}else if ( key.equals(KEY_IP_ADDRESS)
|| key.equals(KEY_GATEWAY)
|| key.equals(KEY_NETMASK)
|| key.equals(KEY_DNS1)
|| key.equals(KEY_DNS2) ) {
String value = (String) newValue;
LOG("onPreferenceChange() : value = " + value);
if ( TextUtils.isEmpty(value) ) {
( (EditTextPreference)preference).setText(value);
preference.setSummary(value);
result = true;
}
else if ( !isValidIpAddress(value) ) {
LOG("onPreferenceChange() : IP address user inputed is INVALID." );
Toast.makeText(getActivity(), R.string.ethernet_ip_settings_invalid_ip, Toast.LENGTH_LONG).show();
return false;
}
else {
( (EditTextPreference)preference).setText(value);
preference.setSummary(value);
result = true;
}
}
return result;
}
private boolean isValidIpAddress(String value) {
int start = 0;
int end = value.indexOf('.');
int numBlocks = 0;
while (start < value.length()) {
if ( -1 == end ) {
end = value.length();
}
try {
int block = Integer.parseInt(value.substring(start, end));
if ((block > 255) || (block < 0)) {
Log.w(TAG, "isValidIpAddress() : invalid 'block', block = " + block);
return false;
}
} catch (NumberFormatException e) {
Log.w(TAG, "isValidIpAddress() : e = " + e);
return false;
}
numBlocks++;
start = end + 1;
end = value.indexOf('.', start);
}
return numBlocks == 4;
}
private boolean isIpDataInUiComplete() {
ContentResolver contentResolver = getContentResolver();
for (int i = 0; i < (mPreferenceKeys.length - 1); i++) {
EditTextPreference preference = (EditTextPreference) findPreference(mPreferenceKeys[i]);
String text = preference.getText();
LOG("isIpDataInUiComplete() : text = " + text);
if ( null == text || TextUtils.isEmpty(text) ) {
return false;
}
}
return true;
}
}
到这一步 Settings 的修改就完成了，就能实现上图的效果了，你可以mm push看效果了
如果你编译报错，大概是 Settings 中没有添加对应的变量，我的本来就有的，
没有的可参考下面的加一下
frameworks\base\core\java\android\provider\Settings.java
// Intent actions for Settings
// ethernet
public static final String ETHERNET_STATIC_IP = "ethernet_static_ip";
public static final String ETHERNET_STATIC_GATEWAY = "ethernet_static_gateway";
public static final String ETHERNET_STATIC_NETMASK = "ethernet_static_netmask";
public static final String ETHERNET_STATIC_DNS1 = "ethernet_static_dns1";
public static final String ETHERNET_STATIC_DNS2 = "ethernet_static_dns2";
public static final String IS_ETHERNET_OPEN = "isEthernetOpen";
public static final String IS_ETHERNET_STATUC_OPEN = "isEthernetStaticOpen";
加完后你需要先 make update-api成功后，在重新 mm 编译应该就好了
二、framework 流程分析
驱动大哥已经把驱动都搞定了，现在直接插上网线，设备就能上网，网卡图标也正常显示。我们需要控制网卡的开关，先来简单看下流程。
frameworks\opt\net\ethernet\java\com\android\server\ethernet\EthernetService.java
public final class EthernetService extends SystemService {
private static final String TAG = "EthernetService";
final EthernetServiceImpl mImpl;
public EthernetService(Context context) {
super(context);
mImpl = new EthernetServiceImpl(context);
}
@Override
public void onStart() {
Log.i(TAG, "Registering service " + Context.ETHERNET_SERVICE);
publishBinderService(Context.ETHERNET_SERVICE, mImpl);
}
@Override
public void onBootPhase(int phase) {
if (phase == SystemService.PHASE_SYSTEM_SERVICES_READY) {
mImpl.start();
}
}
}
EthernetService 继承了系统服务，那自然也就是系统服务，如果挂掉会自动重新创建，严重情况会导致系统重启，我就试出来过。看下当 PHASE_SYSTEM_SERVICES_READY 准备完成，调用 EthernetServiceImpl 的 start()
来看下这个 start() 都干了啥
frameworks\opt\net\ethernet\java\com\android\server\ethernet\EthernetServiceImpl.java
public void start() {
Log.i(TAG, "Starting Ethernet service");
HandlerThread handlerThread = new HandlerThread("EthernetServiceThread");
handlerThread.start();
mHandler = new Handler(handlerThread.getLooper());
mTracker = new EthernetTracker(mContext, mHandler);
mTracker.start();
mStarted.set(true);
}
主要创建了 EthernetTracker，这个类是 9.0 中新增出来的，用于监听以太网的切换、以太网判断当前网络是否可用等一系列操作。之前 8.1 中都集成在 EthernetNetworkFactory 中，继续跟进
frameworks\opt\net\ethernet\java\com\android\server\ethernet\EthernetTracker.java
void start() {
mConfigStore.read();
// Default interface is just the first one we want to track.
mIpConfigForDefaultInterface = mConfigStore.getIpConfigurationForDefaultInterface();
final ArrayMap<String, IpConfiguration> configs = mConfigStore.getIpConfigurations();
Log.e(TAG, "mIpConfigForDefaultInterface== " + mIpConfigForDefaultInterface);
Log.i(TAG, "IpConfiguration size== " + configs.size());
for (int i = 0; i < configs.size(); i++) {
mIpConfigurations.put(configs.keyAt(i), configs.valueAt(i));
}
try {
mNMService.registerObserver(new InterfaceObserver());
} catch (RemoteException e) {
Log.e(TAG, "Could not register InterfaceObserver " + e);
}
mHandler.post(this::trackAvailableInterfaces);
}
mConfigStore 对象用来管理保存的 IpConfigStore 信息，EthernetConfigStore 中通过读取 /misc/ethernet/ipconfig.txt 中保存的信息进行维护一个 ArrayMap<String, IpConfiguration>，根据打印的日志看，start() 中每次获取到的 size 都为 0，基本上没起作用。值得一提的是，在 EthernetTracker 的构造方法中通过解析 config_ethernet_interfaces 字符串也可向 map 中添加初始信息。
EthernetTracker(Context context, Handler handler) {
mHandler = handler;
// The services we use.
IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE);
mNMService = INetworkManagementService.Stub.asInterface(b);
// Interface match regex.
mIfaceMatch = context.getResources().getString(
com.android.internal.R.string.config_ethernet_iface_regex);
// Read default Ethernet interface configuration from resources
final String[] interfaceConfigs = context.getResources().getStringArray(
com.android.internal.R.array.config_ethernet_interfaces);
for (String strConfig : interfaceConfigs) {
parseEthernetConfig(strConfig);
}
mConfigStore = new EthernetConfigStore();
NetworkCapabilities nc = createNetworkCapabilities(true /* clear default capabilities */);
mFactory = new EthernetNetworkFactory(handler, context, nc);
mFactory.register();
}
private void parseEthernetConfig(String configString) {
String[] tokens = configString.split(";");
String name = tokens[0];
String capabilities = tokens.length > 1 ? tokens[1] : null;
NetworkCapabilities nc = createNetworkCapabilities(
!TextUtils.isEmpty(capabilities) /* clear default capabilities */, capabilities);
mNetworkCapabilities.put(name, nc);
if (tokens.length > 2 && !TextUtils.isEmpty(tokens[2])) {
IpConfiguration ipConfig = parseStaticIpConfiguration(tokens[2]);
mIpConfigurations.put(name, ipConfig);
}
}
config_ethernet_interfaces 的初始值位置在
frameworks\base\core\res\res\values\config.xml
<!-- Regex of wired ethernet ifaces -->
<string translatable="false" name="config_ethernet_iface_regex">eth\\d</string>
<!-- Configuration of Ethernet interfaces in the following format:
<interface name|mac address>;[Network Capabilities];[IP config]
Where
[Network Capabilities] Optional. A comma seprated list of network capabilities.
Values must be from NetworkCapabilities#NET_CAPABILITIES_* constants.
[IP config] Optional. If empty or not specified - DHCP will be used, otherwise
use the following format to specify static IP configuration:
ip=<ip-address/mask> gateway=<ip-address> dns=<comma-sep-ip-addresses>
domains=<comma-sep-domains>
-->
<string-array translatable="false" name="config_ethernet_interfaces">
<!--
<item>eth1;12,13,14,15;ip=192.168.0.10/24 gateway=192.168.0.1 dns=4.4.4.4,8.8.8.8</item>
<item>eth2;;ip=192.168.0.11/24</item>
-->
</string-array>
好了继续回到刚刚的 start() 中，接下来应该调用 trackAvailableInterfaces(),来看下完整的流程，maybeTrackInterface 中先进行 iface 判断,这个指代要使用的网口名称，通过命令 ifconfig -a 可以看到你设备下的所有网口名称。
mIfaceMatch 对应刚刚的 config.xml 中配置的 eth\d, 所以只有是 eth 打头并且 mFactory 中不存在的才能设置以太网连接，这很关键
继续调用 addInterface(), 将 iface 对应的 ipConfiguration 通过 mFactory addInterface，再然后 updateInterfaceState 广播通知当前以太网连接状态 CONNECTED/CONNECTED
private void trackAvailableInterfaces() {
try {
final String[] ifaces = mNMService.listInterfaces();
for (String iface : ifaces) {
maybeTrackInterface(iface);
}
} catch (RemoteException | IllegalStateException e) {
Log.e(TAG, "Could not get list of interfaces " + e);
}
}
private void maybeTrackInterface(String iface) {
if (DBG) Log.i(TAG, "maybeTrackInterface " + iface);
// If we don't already track this interface, and if this interface matches
// our regex, start tracking it.
if (!iface.matches(mIfaceMatch) || mFactory.hasInterface(iface)) {
Log.d(TAG, iface + " return ");
return;
}
Log.e(TAG, "maybeTrackInterface " + iface);
if (mIpConfigForDefaultInterface != null) {
updateIpConfiguration(iface, mIpConfigForDefaultInterface);
mIpConfigForDefaultInterface = null;
}
addInterface(iface);
}
private void addInterface(String iface) {
InterfaceConfiguration config = null;
// Bring up the interface so we get link status indications.
try {
mNMService.setInterfaceUp(iface);
config = mNMService.getInterfaceConfig(iface);
} catch (RemoteException | IllegalStateException e) {
// Either the system is crashing or the interface has disappeared. Just ignore the
// error; we haven't modified any state because we only do that if our calls succeed.
Log.e(TAG, "Error upping interface " + iface, e);
}
if (config == null) {
Log.e(TAG, "Null interface config for " + iface + ". Bailing out.");
return;
}
final String hwAddress = config.getHardwareAddress();
NetworkCapabilities nc = mNetworkCapabilities.get(iface);
if (nc == null) {
// Try to resolve using mac address
nc = mNetworkCapabilities.get(hwAddress);
if (nc == null) {
nc = createDefaultNetworkCapabilities();
}
}
IpConfiguration ipConfiguration = mIpConfigurations.get(iface);
if (ipConfiguration == null) {
ipConfiguration = createDefaultIpConfiguration();
}
Log.d(TAG, "Started tracking interface " + iface);
mFactory.addInterface(iface, hwAddress, nc, ipConfiguration);
// Note: if the interface already has link (e.g., if we crashed and got
// restarted while it was running), we need to fake a link up notification so we
// start configuring it.
if (config.hasFlag("running")) {
updateInterfaceState(iface, true);
}
}
private void updateInterfaceState(String iface, boolean up) {
Log.e(TAG, "updateInterfaceState up==" + up);
boolean modified = mFactory.updateInterfaceLinkState(iface, up);
if (modified) {
boolean restricted = isRestrictedInterface(iface);
int n = mListeners.beginBroadcast();
for (int i = 0; i < n; i++) {
try {
if (restricted) {
ListenerInfo listenerInfo = (ListenerInfo) mListeners.getBroadcastCookie(i);
if (!listenerInfo.canUseRestrictedNetworks) {
continue;
}
}
mListeners.getBroadcastItem(i).onAvailabilityChanged(iface, up);
} catch (RemoteException e) {
// Do nothing here.
}
}
mListeners.finishBroadcast();
}
}
知道了 EthernetTracker 的 start() 去连接以太网，那么我们在 EthernetServiceImpl 中增加布尔判断就能控制以太网开关状态。
frameworks\opt\net\ethernet\java\com\android\server\ethernet\EthernetServiceImpl.java
public class EthernetServiceImpl extends IEthernetManager.Stub {
private static final String TAG = "EthernetServiceImpl";
public static final String IS_ETHERNET_OPEN = Settings.IS_ETHERNET_OPEN;
public static final String ETHERNET_USE_STATIC_IP = Settings.IS_ETHERNET_STATUC_OPEN;
private final Context mContext;
private final AtomicBoolean mStarted = new AtomicBoolean(false);
private IpConfiguration mIpConfiguration;
private final EthernetOpenedObserver mOpenObserver = new EthernetOpenedObserver();
private final EthernetStaticObserver mStaticObserver = new EthernetStaticObserver();
private Handler mHandler;
private EthernetTracker mTracker;
public EthernetServiceImpl(Context context) {
mContext = context;
Log.i(TAG, "Creating EthernetConfigStore");
mContext.getContentResolver().registerContentObserver(
System.getUriFor(IS_ETHERNET_OPEN), false, mOpenObserver);
mContext.getContentResolver().registerContentObserver(
System.getUriFor(ETHERNET_USE_STATIC_IP), false, mStaticObserver);
}
....
public void start() {
Log.i(TAG, "Starting Ethernet service");
HandlerThread handlerThread = new HandlerThread("EthernetServiceThread");
handlerThread.start();
mHandler = new Handler(handlerThread.getLooper());
mTracker = new EthernetTracker(mContext, mHandler);
mIpConfiguration = mTracker.getDefaultIpConfiguration();
if (getState() == 1) {
if (isStatic()) {
StaticIpConfiguration staticIpConfiguration = new StaticIpConfiguration();
staticIpConfiguration.domains = Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_NETMASK);
try {
staticIpConfiguration.gateway = InetAddress.getByName(Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_GATEWAY));
staticIpConfiguration.ipAddress = new LinkAddress(InetAddress.getByName(Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_IP)), 24);
staticIpConfiguration.dnsServers.add(InetAddress.getByName(Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_DNS1)));
staticIpConfiguration.dnsServers.add(InetAddress.getByName(Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_DNS2)));
}catch (Exception e){
e.printStackTrace();
}
mIpConfiguration.ipAssignment = IpAssignment.STATIC;
mIpConfiguration.proxySettings = ProxySettings.STATIC;
mIpConfiguration.staticIpConfiguration = staticIpConfiguration;
}
mTracker.start();
mStarted.set(true);
}
}
private boolean isStatic()
{
Log.e(TAG, "EthernetServiceImpl isStatic() "
+ Settings.System.getInt(mContext.getContentResolver(),ETHERNET_USE_STATIC_IP,0));
return Settings.System.getInt(mContext.getContentResolver(),ETHERNET_USE_STATIC_IP,0) ==1;
}
private int getState()
{
int state = Settings.System.getInt(mContext.getContentResolver(), IS_ETHERNET_OPEN,0);
Log.e(TAG, "EthernetServiceImpl getState() " + state);
return state;
}
....
@Override
public void setConfiguration(String iface, IpConfiguration config) {
if (!mStarted.get()) {
Log.w(TAG, "System isn't ready enough to change ethernet configuration");
}
enforceConnectivityInternalPermission();
if (mTracker.isRestrictedInterface(iface)) {
enforceUseRestrictedNetworksPermission();
}
Log.e(TAG, "setConfiguration iface="+iface);
// TODO: this does not check proxy settings, gateways, etc.
// Fix this by making IpConfiguration a complete representation of static configuration.
mTracker.updateIpConfiguration(iface, new IpConfiguration(config));
//add
mTracker.removeInterface(iface);
mTracker.start();
}
....
private final class EthernetOpenedObserver extends ContentObserver {
public EthernetOpenedObserver() {
super(new Handler());
}
@Override
public void onChange(boolean selfChange, Uri uri, int userId) {
super.onChange(selfChange, uri, userId);
Log.i(TAG, "EthernetServiceImpl isEthernetOpen onChange....");
if (getState() == 1) {
if (isStatic()) {
StaticIpConfiguration staticIpConfiguration = new StaticIpConfiguration();
staticIpConfiguration.domains = Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_NETMASK);
try {
staticIpConfiguration.gateway = InetAddress.getByName(Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_GATEWAY));
staticIpConfiguration.ipAddress = new LinkAddress(InetAddress.getByName(Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_IP)), 24);
staticIpConfiguration.dnsServers.add(InetAddress.getByName(Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_DNS1)));
staticIpConfiguration.dnsServers.add(InetAddress.getByName(Settings.System.getString(mContext.getContentResolver(),Settings.ETHERNET_STATIC_DNS2)));
}
catch (Exception e){
e.printStackTrace();
}
mIpConfiguration.ipAssignment = IpAssignment.STATIC;
mIpConfiguration.proxySettings = ProxySettings.STATIC;
mIpConfiguration.staticIpConfiguration = staticIpConfiguration;
}
mTracker.start();
mStarted.set(true);
}else {
mTracker.stop();
}
}
}
private final class EthernetStaticObserver extends ContentObserver {
public EthernetStaticObserver() {
super(new Handler());
}
@Override
public void onChange(boolean selfChange, Uri uri, int userId) {
super.onChange(selfChange, uri, userId);
Log.i(TAG, "EthernetServiceImpl isEthernetStaticOpen onChange....");
if (!isStatic()) {
Log.e(TAG, " no static stop and start");
mTracker.recoverDHCPIpConfiguration();
mTracker.stop();
mTracker.start();
mStarted.set(true);
}
}
}
根据 settings 中设置的值 IS_ETHERNET_OPEN 和 ETHERNET_USE_STATIC_IP 判断是否加载，在 EthernetTracker 中新增如下几个方法
frameworks\opt\net\ethernet\java\com\android\server\ethernet\EthernetTracker.java
//关闭网卡，先更新状态为 false， 再从 mFactory 中移除 eth0, 不然关闭后无法再次打开，因为上面提到的判断
public void stop() {
Log.d(TAG, "EthernetTracker stop ethernet...");
updateInterfaceState("eth0", false);
android.os.SystemClock.sleep(200);
removeInterface("eth0");
}
//获取默认的 IpConfiguration，如果不存在则新建一个 DHCP 类型的，根据实际情况修改 ipAssignment 和 proxySettings
public IpConfiguration getDefaultIpConfiguration(){
IpConfiguration ipConfiguration = mIpConfigurations.get("eth0");
return ipConfiguration != null ? ipConfiguration :
new IpConfiguration(IpAssignment.DHCP, ProxySettings.NONE, null, null);
}
//从静态 IP 切换
public void recoverDHCPIpConfiguration(){
mIpConfigurations.put("eth0", new IpConfiguration(IpAssignment.DHCP, ProxySettings.NONE, null, null));
}
测试发现频繁点击 静态IP 开关时，出现了数组角标越界的情况,应该是 add 和 remove iface导致的，直接将打印 try 一下就可以。
2019-10-21 17:01:38.675 1075-1285/? E/AndroidRuntime: *** FATAL EXCEPTION IN SYSTEM PROCESS: EthernetServiceThread
java.lang.ArrayIndexOutOfBoundsException: length=2; index=-1
at com.android.internal.util.StateMachine$SmHandler.getCurrentState(StateMachine.java:1151)
at com.android.internal.util.StateMachine$SmHandler.access$1300(StateMachine.java:681)
at com.android.internal.util.StateMachine.toString(StateMachine.java:2088)
at java.lang.String.valueOf(String.java:2896)
at java.lang.StringBuilder.append(StringBuilder.java:132)
at com.android.server.ethernet.EthernetNetworkFactory$NetworkInterfaceState.toString(EthernetNetworkFactory.java:422)
at java.lang.String.valueOf(String.java:2896)
at java.lang.StringBuilder.append(StringBuilder.java:132)
at com.android.server.ethernet.EthernetNetworkFactory.networkForRequest(EthernetNetworkFactory.java:213)
at com.android.server.ethernet.EthernetNetworkFactory.acceptRequest(EthernetNetworkFactory.java:78)
at android.net.NetworkFactory.evalRequest(NetworkFactory.java:234)
at android.net.NetworkFactory.evalRequests(NetworkFactory.java:253)
at android.net.NetworkFactory.handleSetFilter(NetworkFactory.java:204)
at android.net.NetworkFactory.handleMessage(NetworkFactory.java:149)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.os.HandlerThread.run(HandlerThread.java:65)
这样就能实现开头的动图效果了。