Android 12升级SDK至31后推送通知点击无响应问题求助

针对你升级SDK到31后通知点击无响应的问题，可按以下步骤排查修复：

1. 确保目标Activity的Manifest配置正确 #

Android 12+要求可从外部启动的Activity必须显式设置android:exported="true"，同时确认Intent Filter配置正确：

<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>

2. 检查Notification Channel是否已创建 #

SDK31+必须提前创建通知渠道，否则通知可能无法正常响应点击。在Application类或启动页添加渠道创建代码：

private fun createNotificationChannel() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        val name = getString(R.string.channel_name)
        val descriptionText = getString(R.string.channel_description)
        val importance = NotificationManager.IMPORTANCE_HIGH
        val channel = NotificationChannel("CHANNEL_ID", name, importance).apply {
            description = descriptionText
        }
        val notificationManager: NotificationManager =
            getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        notificationManager.createNotificationChannel(channel)
    }
}

3. 优化PendingIntent的配置 #

• 避免固定requestCode导致的PendingIntent缓存问题，改用动态值（如时间戳）
• 确认Flag组合正确，若无需修改Intent内容，FLAG_IMMUTABLE是安全的；若需后续更新Intent，改用FLAG_MUTABLE

val notifyIntent = Intent(this, MainActivity::class.java).apply {
    flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
}
// 用动态requestCode避免缓存
val requestCode = System.currentTimeMillis().toInt()
val notifyPendingIntent = PendingIntent.getActivity(
    this,
    requestCode,
    notifyIntent,
    PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
)

4. 区分FCM前台/后台消息处理 #

如果是后台接收FCM消息，系统会直接展示通知，不会触发onMessageReceived，此时需在推送 payload 中添加click_action字段，并在Manifest中为MainActivity配置对应Intent Filter：

推送Payload示例： #

{
  "notification": {
    "title": "标题",
    "body": "内容",
    "click_action": "OPEN_MAIN_ACTIVITY"
  },
  "to": "设备Token"
}

Manifest配置： #

<activity
    android:name=".MainActivity"
    android:exported="true">
    <!-- 原有主入口Filter -->
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
    <!-- 添加对应click_action的Filter -->
    <intent-filter>
        <action android:name="OPEN_MAIN_ACTIVITY" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

5. 修正代码中的语法错误 #

你提供的代码混合了Java和Kotlin语法，修正后的完整PushMessagingService代码如下：

class PushMessagingService : FirebaseMessagingService() {

    override fun onMessageReceived(remoteMessage: RemoteMessage) {
        super.onMessageReceived(remoteMessage)

        val notifyIntent = Intent(this, MainActivity::class.java).apply {
            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
        }
        val requestCode = System.currentTimeMillis().toInt()
        val notifyPendingIntent = PendingIntent.getActivity(
            this,
            requestCode,
            notifyIntent,
            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
        )

        val builder = NotificationCompat.Builder(this, "CHANNEL_ID").apply {
            setSmallIcon(R.drawable.logo)
            setContentTitle(getString(R.string.app_name))
            setContentText(getString(R.string.logging_in))
            priority = NotificationCompat.PRIORITY_HIGH
            setVisibility(NotificationCompat.VISIBILITY_PRIVATE)
            setContentIntent(notifyPendingIntent)
            setAutoCancel(true)
        }
        val notificationId = AtomicInteger().incrementAndGet()
        with(NotificationManagerCompat.from(this)) {
            notify(notificationId, builder.build())
        }
    }
}

内容的提问来源于stack exchange，提问作者Swapnil Akubattin