Android10.0（Q） MTK平台增加以太网静态IP功能

前言

朋友们，网卡功能真的是太太太太常用了，这次我又带着 10.0 的以太网静态IP功能来了，相比 9.0 而言，

framework 没啥大变化，可以直接对比移植。Settings 部分也没啥大变化，preference 对应的包由 v7

变成 androidx，这个导报的时候注意下就行。

效果图

效果图就不贴了，和 9.0 一样都是横屏，差别不大。

上代码

app层

Settins 源码和9.0无差别，完整代码资源链接

这里列下差异地方。

vendor\mediatek\proprietary\packages\apps\MtkSettings\src\com\android\settings\ethernet\EthernetStaticIP.java

9.0 导包

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;

10.0 导包

import androidx.preference.Preference;
import android.preference.PreferenceActivity;
import androidx.preference.PreferenceScreen;
import androidx.preference.CheckBoxPreference;
import androidx.preference.EditTextPreference;
import androidx.preference.SwitchPreference;

framework 层

修改文件清单

 alps/frameworks/base/api/current.txt                                                                              
 alps/frameworks/base/core/java/android/provider/Settings.java                                                      
 alps/frameworks/base/proto/src/metrics_constants/metrics_constants.proto                                           
 alps/frameworks/opt/net/ethernet/java/com/android/server/ethernet/EthernetServiceImpl.java                        
 alps/frameworks/opt/net/ethernet/java/com/android/server/ethernet/EthernetTracker.java

完整代码资源链接

几个注意点

Settings.java 新增字段编译

10.0 之前通过执行命令 make update-api，将新增字段保存到 frameworks/base/api/current.txt 文件中，

这样 java 类引用编译时不报错。10.0 编译命令修改为 make api-stubs-docs-update-current-api

不插网线设置静态IP保存后显示网卡图标bug

不知道你的版本是否也存在这样的bug，不插网线的情况下，设置完静态 ip 各项参数保存后

你惊奇发现状态栏网卡图标出来了。来看下问题日志

2020-05-29 10:07:59.537 1078-1416/system_process D/MtkConnectivityService: registerNetworkAgent NetworkAgentInfo{ ni{[type: Ethernet[], state: CONNECTED/CONNECTED, reason: (unspecified), extra: e8:11:ca:03:da:07, failover: false, available: true, roaming: false]}  network{101}  nethandle{437197393933}  lp{{InterfaceName: eth0 LinkAddresses: [ 192.168.40.30/24 ] DnsAddresses: [ /8.8.8.8 ] Domains: 192.168.40.1 MTU: 0 TcpBufferSizes: 524288,1048576,3145728,524288,1048576,2097152 Routes: [ 192.168.40.0/24 -> 0.0.0.0 eth0,255.255.255.255/32 -> 0.0.0.0 eth0,0.0.0.0/0 -> 255.255.255.255 eth0 ]}}  nc{[ Transports: ETHERNET Capabilities: NOT_METERED&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED LinkUpBandwidth>=100000Kbps LinkDnBandwidth>=100000Kbps]}  Score{0}  everValidated{false}  lastValidated{false}  created{false} lingering{false} explicitlySelected{false} acceptUnvalidated{false} everCaptivePortalDetected{false} lastCaptivePortalDetected{false} captivePortalValidationPending{false} partialConnectivity{false} acceptPartialConnectivity{false} clat{mBaseIface: null, mIface: null, mState: IDLE} }
2020-05-29 10:07:59.545 1078-1373/system_process D/MtkConnectivityService: NetworkAgentInfo [Ethernet () - 101] EVENT_NETWORK_INFO_CHANGED, going from initial to CONNECTED
2020-05-29 10:07:59.550 1078-1373/system_process D/MtkConnectivityService: Setting DNS servers for network 101 to [/8.8.8.8]
2020-05-29 10:07:59.555 1078-1373/system_process D/MtkConnectivityService: Adding iface eth0 to network 101
2020-05-29 10:07:59.570 1078-1373/system_process D/MtkConnectivityService: Setting DNS servers for network 101 to [/8.8.8.8]
2020-05-29 10:07:59.594 1078-1373/system_process D/MtkConnectivityService: Switching to new default network: NetworkAgentInfo{ ni{[type: Ethernet[], state: CONNECTED/CONNECTED, reason: (unspecified), extra: e8:11:ca:03:da:07, failover: false, available: true, roaming: false]}  network{101}  nethandle{437197393933}  lp{{InterfaceName: eth0 LinkAddresses: [ 192.168.40.30/24 ] DnsAddresses: [ /8.8.8.8 ] Domains: 192.168.40.1 MTU: 0 TcpBufferSizes: 524288,1048576,3145728,524288,1048576,2097152 Routes: [ 192.168.40.0/24 -> 0.0.0.0 eth0,255.255.255.255/32 -> 0.0.0.0 eth0,0.0.0.0/0 -> 255.255.255.255 eth0 ]}}  nc{[ Transports: ETHERNET Capabilities: NOT_METERED&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED LinkUpBandwidth>=100000Kbps LinkDnBandwidth>=100000Kbps]}  Score{0}  everValidated{false}  lastValidated{false}  created{true} lingering{false} explicitlySelected{false} acceptUnvalidated{false} everCaptivePortalDetected{false} lastCaptivePortalDetected{false} captivePortalValidationPending{false} partialConnectivity{false} acceptPartialConnectivity{false} clat{mBaseIface: null, mIface: null, mState: IDLE} }
2020-05-29 10:07:59.624 1078-1373/system_process D/MtkConnectivityService: Sending CONNECTED broadcast for type 9 NetworkAgentInfo [Ethernet () - 101] isDefaultNetwork=true

理解下大意为你保存了一个默认网络配置信息(new default network)后，发送 connected 通知出去，所以图标就显示出来了。

这是什么骚操作，一看日志tag就知道是 mkt 自己加的，搜索去看下源码

vendor\mediatek\proprietary\frameworks\opt\net\services\core\java\com\android\server\MtkConnectivityService.java

 /** Adds the given network to the specified legacy type list. */
        public void add(int type, NetworkAgentInfo nai) {
            if (!isTypeSupported(type)) {
                return;  // Invalid network type.
            }
            if (VDBG) log("Adding agent " + nai + " for legacy network type " + type);

            ArrayList<NetworkAgentInfo> list = mTypeLists[type];
            if (list.contains(nai)) {
                return;
            }
            synchronized (mTypeLists) {
                list.add(nai);
            }

            // Send a broadcast if this is the first network of its type or if it's the default.
            final boolean isDefaultNetwork = mService.isDefaultNetwork(nai);
            if ((list.size() == 1) || isDefaultNetwork) {
                maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork);
                mService.sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type);
            }
        }

可以看到当网络列表集合只有一个配置，或是默认网络时，发送 CONNECTED 通知。开始我以为把这里加入网线状态判断后再发送

通知，后来尝试后发现并不行，那就转战应用层去处理这个bug吧。

解决思路

找到网卡图标显示的逻辑，当收到 CONNECTED 通知时同时判断网线是否已经插入，未插入则无效消息，不显示图标

那么问题来了，怎么知道网线是否已经插入或拨出呢。一般来讲这都需要驱动通过gpio口控制监听发送按键消息或

其它通知给上层。分析网线插入拨出相关日志，我发现在 framework 层中就能干这个活，EthernetTracker 中

就已经监听了网口状态。来看下日志

拔出
2020-05-29 09:03:55.847 1104-1131/? I/EthernetTracker: interfaceLinkStateChanged, iface: wlan0, up: false
2020-05-29 09:03:55.848 1104-1447/? E/EthernetTracker: updateInterfaceState up==false modified=false
2020-05-29 09:03:55.847 1104-1131/? I/EthernetTracker: interfaceLinkStateChanged, iface: eth0, up: false
2020-05-29 09:03:55.848 1104-1447/? E/EthernetTracker: updateInterfaceState up==false modified=false

插入

2020-05-29 09:04:55.847 1104-1131/? I/EthernetTracker: interfaceLinkStateChanged, iface: eth0, up: true
2020-05-29 09:04:55.848 1104-1447/? E/EthernetTracker: updateInterfaceState up==true modified=false

主要通过 NetworkManagementService 注册 InterfaceObserver，当网络状态改变时收到实时响应。

frameworks\opt\net\ethernet\java\com\android\server\ethernet\EthernetTracker.java

private class InterfaceObserver extends BaseNetworkObserver {

        @Override
        public void interfaceLinkStateChanged(String iface, boolean up) {
            if (DBG) {
                Log.i(TAG, "interfaceLinkStateChanged, iface: " + iface + ", up: " + up);
            }
            mHandler.post(() -> updateInterfaceState(iface, up));
        }

        @Override
        public void interfaceAdded(String iface) {
            mHandler.post(() -> maybeTrackInterface(iface));
        }

        @Override
        public void interfaceRemoved(String iface) {
            mHandler.post(() -> removeInterface(iface));
        }
    }


	private void updateInterfaceState(String iface, boolean up) {
        boolean modified = mFactory.updateInterfaceLinkState(iface, up);
        Log.e(TAG, "updateInterfaceState up==" + up + " modified="+modified);
        //cczheng add sys.ethernet.up for listen netline in or out 
        if ("eth0".equals(iface)) {
            android.os.SystemProperties.set("sys.ethernet.up", String.valueOf(up));
        }//E
        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();
        }
    }

可以看到我在 updateInterfaceState() 中增加了 prop 保存网线插拔状态，为啥选用 prop 保存呢？因为网卡图标显示在

SystemUI 中，算是跨应用通讯吧，prop 简单方便，就不用 Settings.System/Global 之类的了。接下来修改 SystemUI

网卡图标显示监听在 EthernetSignalController 中

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\policy\EthernetSignalController.java

 @Override
    public void updateConnectivity(BitSet connectedTransports, BitSet validatedTransports) {
        mCurrentState.connected = connectedTransports.get(mTransportType);
        super.updateConnectivity(connectedTransports, validatedTransports);
    }

    @Override
    public void notifyListeners(SignalCallback callback) {
        boolean ethernetVisible = mCurrentState.connected;
        String contentDescription = getStringIfExists(getContentDescription());

        ////cczheng add visible for fix ethernet staticip set don't inset netline show bug
        android.util.Log.e("MtkConnectivityService", " systemui ethernetVisible="+ethernetVisible + " contentDescription="+contentDescription);
        boolean netLineIn = android.os.SystemProperties.getBoolean("sys.ethernet.up", false);
        android.util.Log.e("MtkConnectivityService", " systemui EthernetSignalController netline state ="+netLineIn);

        if (ethernetVisible){
            ethernetVisible = netLineIn;
            android.util.Log.e("MtkConnectivityService", "new ethernetVisible="+ethernetVisible);
        }//E
        
        // TODO: wire up data transfer using WifiSignalPoller.
        callback.setEthernetIndicators(new IconState(ethernetVisible, getCurrentIconId(),
                contentDescription));
        
    }

网线未插入情况，点击设置静态ip收到的日志
2020-05-30 09:19:29.089 1456-1676/com.android.systemui E/MtkConnectivityService:  systemui ethernetVisible=true contentDescription=以太网已断开连接。
2020-05-30 09:19:29.089 1456-1676/com.android.systemui E/MtkConnectivityService:  systemui EthernetSignalController netline state =false

网线插入，点击设置静态ip收到的日志
2020-05-30 09:19:29.089 1456-1676/com.android.systemui E/MtkConnectivityService:  systemui ethernetVisible=true contentDescription=以太网已断开连接。
2020-05-30 09:19:29.089 1456-1676/com.android.systemui E/MtkConnectivityService:  systemui EthernetSignalController netline state =true

可以看到我们需要过滤网线未插入收到的无效消息，读取网线状态 sys.ethernet.up 布尔值，当 ethernetVisible 为 true 时，校验状态

这样改完后测试发现还有坑，坑在真正 setIconVisibility 地方，也就是 StatusBarSignalPolicy

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\phone\StatusBarSignalPolicy.java

	@Override
    public void setEthernetIndicators(IconState state) {
        boolean visible = state.visible && !mBlockEthernet;
        int resId = state.icon;
        String description = state.contentDescription;

        //cczheng add visible for fix ethernet staticip set don't inset netline show bug
        if (visible && resId > 0) {
        //if (resId > 0) {
            mIconController.setIcon(mSlotEthernet, resId, description);
            mIconController.setIconVisibility(mSlotEthernet, true);
        } else {
            mIconController.setIconVisibility(mSlotEthernet, false);
        }
    }

发现了吗，传递进来的 visible 根本就没用上，这是什么大坑啊，将 visible 作为判断依据即可。

好了，这样 bug 就解决了，收工。

20200720 增加更新

网络优先级设置

网卡 > wifi > 4G

frameworks\opt\net\ethernet\java\com\android\server\ethernet\EthernetNetworkFactory.java

public class EthernetNetworkFactory extends NetworkFactory {
    private final static String TAG = EthernetNetworkFactory.class.getSimpleName();
    final static boolean DBG = true;

    private final static int NETWORK_SCORE = 110;
    private static final String NETWORK_TYPE = "Ethernet";


	....

	private static final SparseArray<TransportInfo> sTransports = new SparseArray();
        static {
            // LowpanInterfaceTracker.NETWORK_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_LOWPAN,
                    new TransportInfo(ConnectivityManager.TYPE_NONE, 30));
            // WifiAwareDataPathStateManager.NETWORK_FACTORY_SCORE_AVAIL
            sTransports.put(NetworkCapabilities.TRANSPORT_WIFI_AWARE,
                    new TransportInfo(ConnectivityManager.TYPE_NONE, 1));
            // EthernetNetworkFactory.NETWORK_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_ETHERNET,
                    new TransportInfo(ConnectivityManager.TYPE_ETHERNET, NETWORK_SCORE));//70
            // BluetoothTetheringNetworkFactory.NETWORK_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_BLUETOOTH,
                    new TransportInfo(ConnectivityManager.TYPE_BLUETOOTH, 69));
            // WifiNetworkFactory.SCORE_FILTER / NetworkAgent.WIFI_BASE_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_WIFI,
                    new TransportInfo(ConnectivityManager.TYPE_WIFI, 60));
            // TelephonyNetworkFactory.TELEPHONY_NETWORK_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_CELLULAR,
                    new TransportInfo(ConnectivityManager.TYPE_MOBILE, 50));
     }

TRANSPORT_LOWPAN 低速无限个域网 比分 30

TRANSPORT_WIFI_AWARE wifi相邻设备发现 比分 1

TRANSPORT_ETHERNET 网卡 比分 70

TRANSPORT_BLUETOOTH 蓝牙 比分 69

TRANSPORT_WIFI wifi 比分 60

TRANSPORT_CELLULAR 移动网络 比分 50

按照以往经验只修改 NETWORK_SCORE 值从 70 改成 110 是不行的，有隐藏的坑。

还需要修改 ConnectivityManager.TYPE_ETHERNET 对应赋值为 NETWORK_SCORE

因为获取 getNetworkScore() 方法如下

 private int getNetworkScore() {
            // never set the network score below 0.
            if (!mLinkUp) {
                 Log.e(TAG, " getNetworkScore mLinkUp false");
                return 0;
            }

            int[] transportTypes = mCapabilities.getTransportTypes();
            if (transportTypes.length < 1) {
                Log.w(TAG, "Network interface '" + mLinkProperties.getInterfaceName() + "' has no "
                        + "transport type associated with it. Score set to zero");
                return 0;
            }
            TransportInfo transportInfo = sTransports.get(transportTypes[0], /* if dne */ null);
            if (transportInfo != null) {
                Log.e(TAG, " getNetworkScore transportInfo.mScore="+transportInfo.mScore);
                return transportInfo.mScore;
            }
            return 0;
        }

如果只修改 NETWORK_SCORE=110，你会神奇的发现，当网卡接入局域网时，不能上外网时，打开SIM卡流量开关，

网卡图标消失了，而且网络自动切换到移动网络了。感觉很人性化有没有，可是我并不想要帮我自动切换到移动网络啊。

来看问题日志

局域网转移动网络
2020-07-20 11:38:37.933 1101-1742/system_process D/MtkConnectivityService: currentScore = 30, newScore = 50
2020-07-20 11:38:37.933 1101-1742/system_process D/MtkConnectivityService: rematch for NetworkAgentInfo [MOBILE (LTE) - 104]
2020-07-20 11:38:37.933 1101-1742/system_process D/MtkConnectivityService:    accepting network in place of null
2020-07-20 11:38:37.934 1101-1742/system_process D/MtkConnectivityService: sending new Min Network Score(50): NetworkRequest [ REQUEST id=1, [ Capabilities: INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN] ]
2020-07-20 11:38:37.945 1101-1742/system_process D/MtkConnectivityService: Switching to new default network: NetworkAgentInfo{ ni{[type: MOBILE[LTE], state: CONNECTED/CONNECTED, reason: connected, extra: ctnet, failover: false, available: true, roaming: false]}  network{104}  nethandle{450082295821}  lp{{InterfaceName: ccmni1 LinkAddresses: [ 10.53.196.22/32,240e:ba:c806:8619::1/64 ] DnsAddresses: [ /240e:4e::66,/240e:4e:800::66,/219.146.1.66,/219.147.1.66 ] Domains: null MTU: 1460 TcpBufferSizes: 2097152,4194304,8388608,262144,524288,1048576 Routes: [ 0.0.0.0/0 -> 10.53.196.22 ccmni1,::/0 -> :: ccmni1,10.53.196.22/32 -> 0.0.0.0 ccmni1,240e:ba:c806:8619::/64 -> :: ccmni1 ]}}  nc{[ Transports: CELLULAR Capabilities: XCAP&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&VALIDATED&NOT_ROAMING&NOT_CONGESTED&NOT_SUSPENDED LinkUpBandwidth>=51200Kbps LinkDnBandwidth>=102400Kbps Specifier: <1>]}  Score{50}  everValidated{true}  lastValidated{true}  created{true} lingering{false} explicitlySelected{false} acceptUnvalidated{false} everCaptivePortalDetected{false} lastCaptivePortalDetected{false} captivePortalValidationPending{false} partialConnectivity{false} acceptPartialConnectivity{false} clat{mBaseIface: null, mIface: null, mState: IDLE} }


开机默认局域网情况
2020-07-20 17:13:46.916 1101-1742/system_process D/MtkConnectivityService: currentScore = 0, newScore = 30
2020-07-20 17:13:46.916 1101-1742/system_process D/MtkConnectivityService: rematch for NetworkAgentInfo [Ethernet  - 106]
2020-07-20 17:13:46.916 1087-1380/system_process D/MtkConnectivityService: Switching to new default network: NetworkAgentInfo{ ni{[type: Ethernet[], state: CONNECTED/CONNECTED, reason: (unspecified), extra: e8:11:ca:03:53:98, failover: false, available: true, roaming: false]}  network{100}  nethandle{432902426637}  lp{{InterfaceName: eth0 LinkAddresses: [ fe80::3c1a:67e3:a3cb:4b59/64,192.168.1.114/24 ] DnsAddresses: [ /8.8.8.8,/192.168.1.1 ] Domains: null MTU: 0 TcpBufferSizes: 524288,1048576,3145728,524288,1048576,2097152 Routes: [ fe80::/64 -> :: eth0,192.168.1.0/24 -> 0.0.0.0 eth0,0.0.0.0/0 -> 192.168.1.1 eth0 ]}}  nc{[ Transports: ETHERNET Capabilities: NOT_METERED&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED LinkUpBandwidth>=100000Kbps LinkDnBandwidth>=100000Kbps]}  Score{30}  everValidated{false}  lastValidated{false}  created{true} lingering{false} explicitlySelected{false} acceptUnvalidated{false} everCaptivePortalDetected{false} lastCaptivePortalDetected{false} captivePortalValidationPending{false} partialConnectivity{false} acceptPartialConnectivity{false} clat{mBaseIface: null, mIface: null, mState: IDLE} }

搜索 Switching to new default 关键字，找到 MtkConnectivityService.java 好吧又是这货

vendor\mediatek\proprietary\frameworks\opt\net\services\core\java\com\android\server\MtkConnectivityService.java

private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork,
            ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) {
        if (!newNetwork.everConnected) return;
        boolean keep = newNetwork.isVPN();
        boolean isNewDefault = false;
        NetworkAgentInfo oldDefaultNetwork = null;

        final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork();
        final int score = newNetwork.getCurrentScore();
		
		.....

		 if (VDBG || DDBG) {
                    log("currentScore = " +
                            (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) +
                            ", newScore = " + score);
                }

看到上面打印 newScore 值来自 newNetwork.getCurrentScore() 方法，搜索找到 NetworkAgentInfo.java 中

frameworks\base\services\core\java\com\android\server\connectivity\NetworkAgentInfo.java

private int getCurrentScore(boolean pretendValidated) {
        // TODO: We may want to refactor this into a NetworkScore class that takes a base score from
        // the NetworkAgent and signals from the NetworkAgent and uses those signals to modify the
        // score.  The NetworkScore class would provide a nice place to centralize score constants
        // so they are not scattered about the transports.

        // If this network is explicitly selected and the user has decided to use it even if it's
        // unvalidated, give it the maximum score. Also give it the maximum score if it's explicitly
        // selected and we're trying to see what its score could be. This ensures that we don't tear
        // down an explicitly selected network before the user gets a chance to prefer it when
        // a higher-scoring network (e.g., Ethernet) is available.
        if (networkMisc.explicitlySelected && (networkMisc.acceptUnvalidated || pretendValidated)) {
            return ConnectivityConstants.EXPLICITLY_SELECTED_NETWORK_SCORE;
        }

        int score = currentScore;
        if (!lastValidated && !pretendValidated && !ignoreWifiUnvalidationPenalty() && !isVPN()) {
            score -= ConnectivityConstants.UNVALIDATED_SCORE_PENALTY;
        }
        if (score < 0) score = 0;
        return score;
    }

一直好奇上面的网卡 30 分是怎么来的？看到这里就明白了，我们修改的 NETWORK_SCORE=110 并没有用，实际取得是 sTransports 中

70，然后在 getCurrentScore() 中由于网络不是有效的能上网网络，则需要减去 UNVALIDATED_SCORE_PENALTY 40

30 = sTransports.TRANSPORT_ETHERNET - UNVALIDATED_SCORE_PENALTY

frameworks\base\services\core\java\com\android\server\connectivity\ConnectivityConstants.java

public class ConnectivityConstants {

    // Penalty applied to scores of Networks that have not been validated.
    public static final int UNVALIDATED_SCORE_PENALTY = 40;

    // Score for explicitly connected network.
    //
    // This ensures that a) the explicitly selected network is never trumped by anything else, and
    // b) the explicitly selected network is never torn down.
    public static final int EXPLICITLY_SELECTED_NETWORK_SCORE = 100;
    // VPNs typically have priority over other networks. Give them a score that will
    // let them win every single time.
    public static final int VPN_DEFAULT_SCORE = 101;
}

这样问题就搞清楚了。还有坑在 wifi 和 局域网同时连接，wifi 图标依旧显示，修改如下地方即可

vendor/mediatek/proprietary/packages/apps/SystemUI/src/com/android/systemui/statusbar/policy/WifiSignalController.java

@@ -89,8 +89,12 @@ public class WifiSignalController extends
         // only show wifi in the cluster if connected or if wifi-only
         boolean visibleWhenEnabled = mContext.getResources().getBoolean(
                 R.bool.config_showWifiIndicatorWhenEnabled);
         Log.v(TAG,"mCurrentState.inetCondition = " + mCurrentState.inetCondition);
         boolean wifiVisible = mCurrentState.enabled
                && (mCurrentState.connected || !mHasMobileData || visibleWhenEnabled)
                && (mCurrentState.inetCondition == 1);
         //cczheng add mCurrentState.inetCondition == 1 for fix eth icon and wifi icon same show
         String wifiDesc = wifiVisible ? mCurrentState.ssid : null;
         boolean ssidPresent = wifiVisible && mCurrentState.ssid != null;
         String contentDescription = getStringIfExists(getContentDescription());