如何在通知单击上恢复以前的活动操作

Question

我有一个活动，正在执行一些下载功能。该活动将弹出一个进度对话框，在下载时禁用用户交互，并创建一个通知进度。

我希望用户能够点击通知，并返回用户的活动，有对话框显示的进度和禁用用户交互(基本上发生什么当用户去主屏幕，然后重新打开应用程序)。

我当前的尝试似乎重新启动活动，下载仍在进行，但对话框已经消失，用户交互被禁用。我该如何解决这个问题?

我的方法:

set intent action

private static void buildNotification()
{
    //create intent  for onClick
    Intent resultIntent = new Intent(activity,  activity.GetType());
    resultIntent.SetAction(Intent.ActionMain);
    resultIntent.AddCategory(Intent.CategoryLauncher);
    PendingIntent resultPendingIntent = PendingIntent.GetActivity(activity, 0, resultIntent, PendingIntentFlags.UpdateCurrent);
    //set builder
    builder.SetContentIntent(resultPendingIntent);
    notificationManager = activity.GetSystemService(Context.NotificationService) as NotificationManager;
}

set intent flags

private static void buildNotification()
{
    //create intent  for onClick
    Intent resultIntent = new Intent(activity,  activity.GetType());
    resultIntent.SetFlags(ActivityFlags.SingleTop | ActivityFlags.ClearTop);
    PendingIntent resultPendingIntent = PendingIntent.GetActivity(activity, 0, resultIntent, PendingIntentFlags.UpdateCurrent);
    //set builder
    builder.SetContentIntent(resultPendingIntent);
    notificationManager = activity.GetSystemService(Context.NotificationService) as NotificationManager;
}

Answer 1

我最终只把SingleTop标记在意图上。希望这对某人有所帮助:

private static void buildNotification()
{
        //create intent  for onClick
    Intent resultIntent = new Intent(activity, activity.GetType());
    resultIntent.SetFlags(ActivityFlags.SingleTop);
    PendingIntent resultPendingIntent = PendingIntent.GetActivity(activity, 0, resultIntent, PendingIntentFlags.UpdateCurrent);
    //set builder
    builder.SetContentIntent(resultPendingIntent);
    notificationManager = activity.GetSystemService(Context.NotificationService) as NotificationManager;
}

顺便说一下，我正在使用Xamarin。Android