Delphi Seattle Android TNotificationCenter在触发一个通知后取消所有不工作

我正在使用Delphi DX，并在android设备上进行测试
当用户单击按钮时，我正在创建多个计划通知
当用户点击另一个按钮时，我会清除剩余的通知

我似乎无法让TNotificationCenter.CancelAll在一个通知触发后实际取消通知

使用Delphi示例作为基本代码
我将“立即发送通知”按钮更改为“发送多个通知”，代码如下所示

procedure TNotificationsForm.btnSendMultipleNotificationsClick(
  Sender: TObject);

  procedure MyNotificationCreate(aNotificationName : String; aSecondDelay : Word);
  var
    Notification: TNotification;
  begin
    if (aSecondDelay < 0) or (aSecondDelay > 60) then
      raise Exception.Create('Seconds must be between 0 and 60');
    { verify if the service is actually supported }
    Notification := NotificationC.CreateNotification;
    try
      Notification.Name := aNotificationName;
      Notification.AlertBody := aNotificationName + ' ran after ' + inttostr(aSecondDelay) + ' seconds';

      { Fired in 10 second }
      Notification.FireDate := Now + EncodeTime(0,0,aSecondDelay,0);

      { Send notification in Notification Center }
      NotificationC.ScheduleNotification(Notification);
    finally
      Notification.DisposeOf;
    end;
  end;
begin
  MyNotificationCreate('First' , 5);
  MyNotificationCreate('Second', 10);
  MyNotificationCreate('Third' , 15);
end;

但是，如果单击“多通知”按钮并等待第一个通知发出，然后单击“取消所有通知”按钮，则不会取消其余通知。e、 g.第二次和第三次通知仍在运行

---

有人见过这个吗？或者，您是否知道为什么在发送一个通知后CancelAll事件不起作用

我发现了问题并使其起作用
此解决方案要求通知名的第一个字符不是数字
如果你能想出更好的方法来解决这个问题，请发布你的答案

如果您遇到相同的问题，请将System.Android.Notification.pas从文件复制到项目文件夹中，并尝试一下

发送三个或更多通知后，第一个通知在android上触发，通知失去了#10字符

e、 g.一=10#二=11#三=12 变为2=113=12，然后“全部取消”没有获得名称匹配，并且从未取消两个或三个

我已经复制了
Embarcadero\Studio\17.0\source\rtl\common\System.Android.Notification.pas
将文件添加到我的项目文件中，并对其进行修改，以帮助更清楚地了解正在发生的事情

这是我用来帮助追踪问题的函数

function TAndroidPreferenceAdapter.GetAllNotificationsNames: TStringList;
var
  Notifications: TStringList;
  NotificationsStr: JString;
  I: Integer;
begin
  Notifications := TStringList.Create;
  NotificationsStr := FPreference.getString(TJNotificationAlarm.JavaClass.SETTINGS_NOTIFICATION_IDS, nil);
  Notifications.Text := JStringToString(NotificationsStr);
  for I := 0 to Notifications.Count - 1 do
    Notifications[I] := ExtractName(Notifications[I]);

  Result := Notifications;
end;

我最后做的是检查字符串列表循环中是否有超过1个=字符
如果大于1，则删除原始行，然后从=字符循环原始字符串，直到出现非数字数字，然后将其重新插入字符串列表

function TAndroidPreferenceAdapter.GetAllNotificationsNamesNonFiltered: TStringList;
var
  Notifications: TStringList;
  NotificationsStr: JString;
  I: Integer;
  function OccurrencesOfChar(const S: string; const C: char): integer;
  var
    i: Integer;
  begin
    result := 0;
    for i := 1 to Length(S) do
      if S[i] = C then
        inc(result);
  end;

  function InsertLineBreaks(const S: string) : String;
  var sNewString, sRemaining : String;

      i : integer;
      const validChars = '0123456789';
  begin
    try
      sNewString := '';
      sRemaining := S;
      for I := pos('=',sRemaining,1) to length(sRemaining) -1 do begin
        if pos( sRemaining[i], validChars ) > 0 then begin
          //continue as its still an integer
        end else begin
          sNewString := copy( sRemaining, 0, i);
          sRemaining := copy( sRemaining, i+1, Length(s));
          if OccurrencesOfChar(sRemaining, '=') > 1  then begin
            InsertLineBreaks(sRemaining);
            sRemaining := '';
          end;
          break;
        end;
      end;
      if sNewString <> '' then
        Notifications.Add( sNewString ) ;
      if sRemaining <> '' then
        Notifications.Add( sRemaining ) ;
      Result := sNewString + sRemaining;
    except
      on E:Exception do begin
        e.Message := e.Message + #13#10 + 'fn[TAndroidPreferenceAdapter.GetAllNotificationsNamesNonFiltered.InsertLineBreaks]';
        raise;
      end;
    end;
  end;
var sTemp : String;
begin
  Notifications := TStringList.Create;
  NotificationsStr := FPreference.getString(TJNotificationAlarm.JavaClass.SETTINGS_NOTIFICATION_IDS, nil);
  Notifications.Text := JStringToString(NotificationsStr);

  for I := 0 to Notifications.Count - 1 do begin
    if OccurrencesOfChar(Notifications[I], '=') > 1 then begin
      sTemp := Notifications[I];
      Notifications.Delete( i );
      InsertLineBreaks( sTemp );
      break;
    end;
  end;

  Result := Notifications;
end;

到新的GetAllNotificationsNameNoFiltered

如果上面的内容不合理，请查看源代码

function TAndroidPreferenceAdapter.GetAllNotificationsNamesNonFiltered: TStringList;
var
  Notifications: TStringList;
  NotificationsStr: JString;
  I: Integer;
  function OccurrencesOfChar(const S: string; const C: char): integer;
  var
    i: Integer;
  begin
    result := 0;
    for i := 1 to Length(S) do
      if S[i] = C then
        inc(result);
  end;

  function InsertLineBreaks(const S: string) : String;
  var sNewString, sRemaining : String;

      i : integer;
      const validChars = '0123456789';
  begin
    try
      sNewString := '';
      sRemaining := S;
      for I := pos('=',sRemaining,1) to length(sRemaining) -1 do begin
        if pos( sRemaining[i], validChars ) > 0 then begin
          //continue as its still an integer
        end else begin
          sNewString := copy( sRemaining, 0, i);
          sRemaining := copy( sRemaining, i+1, Length(s));
          if OccurrencesOfChar(sRemaining, '=') > 1  then begin
            InsertLineBreaks(sRemaining);
            sRemaining := '';
          end;
          break;
        end;
      end;
      if sNewString <> '' then
        Notifications.Add( sNewString ) ;
      if sRemaining <> '' then
        Notifications.Add( sRemaining ) ;
      Result := sNewString + sRemaining;
    except
      on E:Exception do begin
        e.Message := e.Message + #13#10 + 'fn[TAndroidPreferenceAdapter.GetAllNotificationsNamesNonFiltered.InsertLineBreaks]';
        raise;
      end;
    end;
  end;
var sTemp : String;
begin
  Notifications := TStringList.Create;
  NotificationsStr := FPreference.getString(TJNotificationAlarm.JavaClass.SETTINGS_NOTIFICATION_IDS, nil);
  Notifications.Text := JStringToString(NotificationsStr);

  for I := 0 to Notifications.Count - 1 do begin
    if OccurrencesOfChar(Notifications[I], '=') > 1 then begin
      sTemp := Notifications[I];
      Notifications.Delete( i );
      InsertLineBreaks( sTemp );
      break;
    end;
  end;

  Result := Notifications;
end;

Notifications := TStringList.Create;
NotificationsStr := FPreference.getString(TJNotificationAlarm.JavaClass.SETTINGS_NOTIFICATION_IDS, nil);
Notifications.Text := JStringToString(NotificationsStr);