React Expo API 只能呈現有進度數值的通知視窗，如下列 YouTube 錄影所示。

從 AI 的回應來看，如果要進一步自訂通知視窗，需要使用 bare work flow。

使用 bare work flow，需要仰賴原生 Module 來跟 Android 原生 Notification API 互動。

先使用 AI 生成樣板代碼：

// ProgressNotificationModule.kt
package com.yourpackage.progressnotification

import android.app.Notification
import android.app.NotificationChannel
import android.app.NotificationManager
import android.content.Context
import android.os.Build
import androidx.core.app.NotificationCompat
import com.facebook.react.bridge.ReactApplicationContext
import com.facebook.react.bridge.ReactContextBaseJavaModule
import com.facebook.react.bridge.ReactMethod

class ProgressNotificationModule(reactContext: ReactApplicationContext) : ReactContextBaseJavaModule(reactContext) {

    companion object {
        private const val CHANNEL_ID = "progress_channel"
        private const val NOTIFICATION_ID = 1
    }

    private val notificationManager: NotificationManager by lazy {
        reactContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    }

    init {
        createNotificationChannel()
    }

    override fun getName(): String = "ProgressNotification"

    private fun createNotificationChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val channel = NotificationChannel(CHANNEL_ID, "Progress Notifications", NotificationManager.IMPORTANCE_LOW)
            notificationManager.createNotificationChannel(channel)
        }
    }

    @ReactMethod
    fun showProgressNotification(title: String, content: String, progress: Int) {
        val builder = NotificationCompat.Builder(reactApplicationContext, CHANNEL_ID)
            .setSmallIcon(android.R.drawable.stat_sys_download)
            .setContentTitle(title)
            .setContentText(content)
            .setPriority(NotificationCompat.PRIORITY_LOW)
            .setOngoing(true)

        if (progress in 0..100) {
            builder.setProgress(100, progress, false)
        }

        notificationManager.notify(NOTIFICATION_ID, builder.build())
    }

    @ReactMethod
    fun hideProgressNotification() {
        notificationManager.cancel(NOTIFICATION_ID)
    }
}

// ProgressNotificationPackage.kt
package com.yourpackage.progressnotification

import com.facebook.react.ReactPackage
import com.facebook.react.bridge.NativeModule
import com.facebook.react.bridge.ReactApplicationContext
import com.facebook.react.uimanager.ViewManager

class ProgressNotificationPackage : ReactPackage {
    override fun createViewManagers(reactContext: ReactApplicationContext): List<ViewManager<*, *>> = emptyList()

    override fun createNativeModules(reactContext: ReactApplicationContext): List<NativeModule> =
        listOf(ProgressNotificationModule(reactContext))
}

在 Android 目錄中，建立上述 2 個 class。

路徑參考：android/app/src/main/java/com/jim/notification/ProgressNotificationModule.kt