如何在Android中显示一定时间后的通知

// 创建通知渠道
NotificationChannel channel = new NotificationChannel("channel_id", "Channel Name", NotificationManager.IMPORTANCE_DEFAULT);
NotificationManager notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);

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

// 设置通知触发时间
long delay = 5000; // 延迟5秒
long triggerTime = System.currentTimeMillis() + delay;
Intent intent = new Intent(this, MyBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, triggerTime, pendingIntent);

// 发送通知
int notificationId = 1; // 唯一的通知ID
notificationManager.notify(notificationId, builder.build());