Android定时闹钟通知不显示问题求助（附代码）

我用Kotlin开发了一款提醒应用，支持用户设置标题、备注、日期和时间，原本应该在指定的准确时间推送通知，但到设定时间后完全没反应。已经通过调试确认所有数据传递正常，附上相关代码，请求帮忙排查修复：

Manifest文件 #

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

    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />
    <uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.XReminder"
        tools:targetApi="31">
        <activity
            android:name=".activity.MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name=".notification.NotificationReceiver" />
    </application>

</manifest>

Notification类 #

@RequiresApi(Build.VERSION_CODES.O)
class Notification(
    name: String,
    description: String,
    private var context: Context,
    var id: String,
    private var reminder: Reminder
) {

    init {
        createChannel(name, description)
        startNotification()
    }

    @SuppressLint("ScheduleExactAlarm")
    private fun startNotification() {
        val calendar = Calendar.getInstance()
        calendar.set(Calendar.HOUR_OF_DAY, (reminder.time).split(":")[0].toInt())
        calendar.set(Calendar.MINUTE, (reminder.time).split(":")[1].toInt())
        calendar.set(Calendar.SECOND, 0) // Change its default from 13 to 0 to be precise
        calendar.set(Calendar.MILLISECOND, 0) // Change its default from 14 to 0 to be precise
        calendar.set(Calendar.DAY_OF_YEAR, (reminder.date).split(".")[0].toInt())
        calendar.set(
            Calendar.MONTH,
            (reminder.date).split(".")[1].toInt() - 1
        ) // Month start from 0 but in reality it starts from 1
        calendar.set(Calendar.YEAR, (reminder.date).split(".")[2].toInt())

        val notificationIntent = Intent(context, NotificationReceiver::class.java)
        notificationIntent.putExtra("id", id)
        val alarmManager = context.getSystemService(ALARM_SERVICE) as AlarmManager
        alarmManager.setExact(
            AlarmManager.RTC_WAKEUP, calendar.timeInMillis, PendingIntent.getBroadcast(
                context, id.toInt(), notificationIntent, PendingIntent.FLAG_IMMUTABLE
            )
        )
    }

    @RequiresApi(Build.VERSION_CODES.O)
    private fun createChannel(name: String, description: String) {
        val importance = NotificationManager.IMPORTANCE_HIGH
        val channel = NotificationChannel(id, name, importance)
        channel.description = description
        val notificationManager = context.getSystemService(NotificationManager::class.java)
        notificationManager.createNotificationChannel(channel)
    }
}

NotificationReceiver类 #

class NotificationReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context?, intent: Intent?) {
        val currentId = intent!!.extras!!.getString("id")
        val notificationManager =
            context!!.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        // Use runBlocking because we have no access to lifecycleScope
        runBlocking {
            val currentReminder = context.dataStore.data.first().remindersList.find {
                it.hashCode() == currentId!!.toInt()
            }

            createNotification(
                context,
                currentId.toString(),
                currentReminder!!.title,
                currentReminder.memo,
                notificationManager
            )
        }
    }

    private fun createNotification(
        context: Context?,
        id: String,
        title: String,
        memo: String,
        notificationManager: NotificationManager
    ) {
        val notification = NotificationCompat.Builder(context!!, id)
            .setSmallIcon(R.drawable.baseline_notification_important)
            .setContentTitle(title)
            .setContentText(memo)
            .setPriority(NotificationCompat.PRIORITY_HIGH).build()

        notificationManager.notify(id.toInt(), notification)
    }
}

我已经对应用进行调试，在多处设置断点后确认所有数据均已正确传递。

内容的提问来源于stack exchange，提问作者Mohammad Javad Farmani