Android 11.0适配须知

更新时间: 2025-07-01 01:32

此处对Android 11车机适配过程中涉及的修改进行说明，适配修改主要涉及蓝牙和Wi-Fi两个模块。其中蓝牙模块的适配主要用于HiCar的连接和设备发现，蓝牙模块的修改适配可参考3.1.2.2-蓝牙。Wi-Fi模块的适配主要用于HiCar的连接和视频流传输等功能，具体修改点可参考以下方案：

说明

以下修改方案及代码实现仅供厂商参考，具体修改的内容需厂商根据车机系统情况进行适配。

对Wi-Fi模块的修改主要是为感知Wi-Fi网络的状态变化，具体要修改的文件路径及增加的内容如下：

frameworks/opt/net/wifi/service/java/com/android/server/wifi/SoftApManager.java

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public class SoftApManager implements ActiveModeManager {

    //此处省略原有代码
    private static final String ACTION_WIFI_AP_STA_JOIN  = "android.net.wifi.WIFI_AP_STA_JOIN";

    private static final String ACTION_WIFI_AP_STA_LEAVE = "android.net.wifi.WIFI_AP_STA_LEAVE";

     /**
     * Listener for soft AP events.
     */
    private final SoftApListener mSoftApListener = new SoftApListener() {
        //此处省略原有代码
        @Override
        public void onStationAssociated(String macAddress) {
            Log.i(TAG, "onStationAssociated macAddress: " + macAddress);
            mStateMachine.sendMessage(SoftApStateMachine.CMD_NOTIFY_STATION_ASSOCIATED, macAddress);
        }

        @Override
        public void onStationDisassociated(String macAddress) {
            Log.i(TAG, "onStationDisassociated macAddress: " + macAddress);
            mStateMachine.sendMessage(SoftApStateMachine.CMD_NOTIFY_STATION_DISASSOCIATED, macAddress);
        }
    }

    private void notifyStationChanged(String action, String macAddress) {
        if (action != null && mContext != null) {
            Intent apStaChangedIt = new Intent(action);
            apStaChangedIt.putExtra("macInfo", macAddress);
            Log.i(TAG, "notifyStationChanged macAddress=" + macAddress);
            mContext.sendBroadcastAsUser(apStaChangedIt, UserHandle.ALL, android.Manifest.permission.ACCESS_WIFI_STATE);
        }
    }

    private class SoftApStateMachine extends StateMachine {
        // 此处省略原有代码
        public static final int CMD_NOTIFY_STATION_ASSOCIATED = 12;
        public static final int CMD_NOTIFY_STATION_DISASSOCIATED = 13;

        // 此处省略原有代码
        @Override
        public boolean processMessage(Message message) {
            switch (message.what) {
                // 此处省略原有代码
                case CMD_NOTIFY_STATION_ASSOCIATED:
                    notifyStationChanged(ACTION_WIFI_AP_STA_JOIN, (String) message.obj);
                    break;
                case CMD_NOTIFY_STATION_DISASSOCIATED:
                    notifyStationChanged(ACTION_WIFI_AP_STA_LEAVE, (String) message.obj);
                    break;
                default:
                    return NOT_HANDLED;
            }
        }
    }
}

frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiNative.java

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public class WifiNative {
    // 此处省略原有部分代码
    public interface SoftApListener extends WifiNl80211Manager.SoftApCallback {

    // 此处省略原有部分代码
    /**
     * Notify station associated
     */
    void onStationAssociated(String macAddress);

    /**
     * Notify station disassociated
     */
    void onStationDisassociated(String macAddress);
    }
}

frameworks/base/wifi/java/android/net/wifi/nl80211/WifiNl80211Manager.java

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public class WifiNl80211Manager {

    // 此处省略原有部分代码
    public interface SoftApCallback {

        // 此处省略原有部分代码
        /**
        * Notify station associated
        */
        void onStationAssociated(String macAddress);

        /**
        * Notify station disassociated
        */
        void onStationDisassociated(String macAddress);
    }

    // 此处省略原有部分代码
    private class ApInterfaceEventCallback extends IApInterfaceEventCallback.Stub {

        // 此处省略原有部分代码
        @Override
        public void onStationAssociated(String macAddress) {
            mExecutor.execute(() -> mSoftApListener.onStationAssociated(macAddress));
        }
        @Override
        public void onStationDisassociated(String macAddress) {
            mExecutor.execute(() -> mSoftApListener.onStationDisassociated(macAddress));
        }  
    }
}

Native层需要修改的文件如下：

system/connectivity/wificond/aidl/android/net/wifi/nl80211/IApInterfaceEventCallback.aidl

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oneway interface IApInterfaceEventCallback {

    // 此处省略原有代码
    // Notify station associated
    //
    // @param macAddress mac address of this station
    oneway void onStationAssociated(String macAddress);

    // Notify station disassociated
    //
    // @param macAddress mac address of this station
    oneway void onStationDisassociated(String macAddress);
}

system/connectivity/wificond/ap_interface_binder.h

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class ApInterfaceBinder : public android::net::wifi::nl80211::BnApInterface {
    // 省略原有代码
    void NotifyStationAssociated(const String16& mac_address);
    void NotifyStationDisassociated(const String16& mac_address);
}

system/connectivity/wificond/ap_interface_impl.cpp

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void ApInterfaceImpl::OnStationEvent(
    StationEvent event,
    const array<uint8_t, ETH_ALEN>& mac_address) {
    if (event == NEW_STATION) {
        // 省略原有代码
        binder_->NotifyStationAssociated(String16(LoggingUtils::GetMacString(mac_address).c_str()));
    } else if (event == DEL_STATION) {
        // 省略原有代码
        binder_->NotifyStationDisassociated(String16(LoggingUtils::GetMacString(mac_address).c_str()));
    }
}

system/connectivity/wificond/ap_interface_binder.cpp

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// 此处省略原有代码
void ApInterfaceBinder::NotifyStationAssociated(const String16& mac_address) {
    if (ap_interface_event_callback_ != nullptr) {
        ap_interface_event_callback_->onStationAssociated(mac_address);
    }
}

void ApInterfaceBinder::NotifyStationDisassociated(const String16& mac_address) {
    if (ap_interface_event_callback_ != nullptr) {
        ap_interface_event_callback_->onStationDisassociated(mac_address);
    }
}

frameworks/base/core/res/AndroidManifest.xml

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// 省略原有代码
<!-- For HiCar SDK OS -->
<protected-broadcast android:name="android.net.wifi.WIFI_AP_STA_JOIN" />
<protected-broadcast android:name="android.net.wifi.WIFI_AP_STA_LEAVE" />