android - 通过 HCE 付款

Question

我一直在开发需要实现触碰付款的应用程序。我能够将 HCE 服务与 NFC 终端连接。
现在我的问题是接下来的步骤是什么，用它进行实际付款？
我到处搜索，但找不到合适的文件。请帮我。
下面是我编写的将 HCE 服务连接到 NFC 终端的代码。
Android list

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.nfcemulator">

    <uses-permission android:name="android.permission.NFC" />

    <uses-feature android:name="android.hardware.nfc.hce"
        android:required="true" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.NFCEmulator">

        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service
            android:name=".service.HCEService"
            android:exported="true"
            android:permission="android.permission.BIND_NFC_SERVICE">
            <intent-filter>
                <action android:name="android.nfc.cardemulation.action.HOST_APDU_SERVICE" />
            </intent-filter>

            <meta-data
                android:name="android.nfc.cardemulation.host_apdu_service"
                android:resource="@xml/apduservice" />
        </service>

    </application>

</manifest>

HCE服务

class HCEService: HostApduService() {

    companion object {
        val TAG = "Host Card Emulator"
        val STATUS_SUCCESS = "9000"
        val STATUS_FAILED = "6F00"
        val CLA_NOT_SUPPORTED = "6E00"
        val INS_NOT_SUPPORTED = "6D00"
        val AID = "A0000002471001"
        val SELECT_INS = "A4"
        val DEFAULT_CLA = "00"
        val MIN_APDU_LENGTH = 12
    }

    override fun onDeactivated(reason: Int) {
        Log.d(TAG, "Deactivated: " + reason)
    }

    override fun processCommandApdu(commandApdu: ByteArray?, extras: Bundle?): ByteArray {

        if (commandApdu == null) {
            return Utils.hexStringToByteArray(STATUS_FAILED)
        }

        val hexCommandApdu = Utils.toHex(commandApdu)
        if (hexCommandApdu.length < MIN_APDU_LENGTH) {
            return Utils.hexStringToByteArray(STATUS_FAILED)
        }

        if (hexCommandApdu.substring(0, 2) != DEFAULT_CLA) {
            return Utils.hexStringToByteArray(CLA_NOT_SUPPORTED)
        }

        if (hexCommandApdu.substring(2, 4) != SELECT_INS) {
            return Utils.hexStringToByteArray(INS_NOT_SUPPORTED)
        }

        if (hexCommandApdu.substring(10, 24) == AID)  {
            return Utils.hexStringToByteArray(STATUS_SUCCESS)
        } else {
            return Utils.hexStringToByteArray(STATUS_FAILED)
        }

    }

}

apduservices.xml

<?xml version="1.0" encoding="utf-8"?>
<host-apdu-service xmlns:android="http://schemas.android.com/apk/res/android"
    android:description="@string/hce_service"
    android:requireDeviceUnlock="false">
    <aid-group android:description="@string/aid_groups"
        android:category="other">
        <aid-filter android:name="325041592E5359532E4444463031"/>
    </aid-group>
</host-apdu-service>

Answer 1

我认为您在较低级别上使用了此功能，考虑到使用 Google Pay 时提供此功能(它支持 NFC 支付和在线购买)，这是不必要的。
All you need to know about Google Pay if you’re a developer
Flutter 支付插件是为您的 Android 应用添加支付功能的最快方法。
Google Pay introduces a Flutter plugin for payments
Pay plugin 1.0.6