private void PromptAction() { var config = new PromptConfig(); config.AndroidStyleId = 0; config.SetCancelText("Cancel"); config.SetOkText("Ok"); config.SetCancellable(true); config.OnAction = (x) => { }; config.SetOnTextChanged((x) => { }); config.SetTitle("Add bookmark"); config.SetPlaceholder("Add bookmark name"); string text = "My bookmark"; config.SetText(text); config.SetMaxLength(70 + 5); config.SetInputMode(InputType.Default); var dialog = DependencyService.Get <ICustomUserDialog>(); dialog.Prompt(config); }