使用: NotificationCompat.Builder不显示通知

// 创建通知渠道（仅适用于Android 8.0及以上版本）
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    NotificationChannel channel = new NotificationChannel("channel_id", "channel_name", NotificationManager.IMPORTANCE_DEFAULT);
    NotificationManager notificationManager = getSystemService(NotificationManager.class);
    notificationManager.createNotificationChannel(channel);
}

// 创建通知
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "channel_id")
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("通知标题")
        .setContentText("通知内容")
        .setPriority(NotificationCompat.PRIORITY_DEFAULT)
        .setAutoCancel(true);

// 显示通知
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.notify(notificationId, builder.build());