[Question] When i try tapping the back button on my phone after doing multiple stuffs it closes the whole app

[cupux]

Question

I am building an ecormence app with flet, when i export to apk to test on my phone any time i hit the back button it closes the whole app and would have to open it again.. is there something i missed? shouldn't the back button move to the previous page?

Code sample

No response

Error message

No response

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• I have searched for answers to my question both in the issues and in previous discussions.

[FeodorFitsner]

Are you using routing/views? Can you please provide some code to reproduce the issue?

[cupux]

Sure, please here is my main.py page

def handle_route_change(page: ft.Page, drawer: ft.NavigationDrawer):
    async def route_change(route):
        page.views.clear()

        if page.route == "/homepage":
            page.drawer = drawer
            page.views.append(
                ft.View(
                    route="/homepage",
                    padding=ft.padding.all(0),
                    appbar=AppBarView(page, drawer),
                    bottom_appbar=custom_bottom_appbar(page),
                    drawer=drawer,
                    controls=[HomepageView(page)],
                )
            )

        param = page.route
        res = urlparse(param).path.split("/")[-1]
        if page.route == f"/ads-detail/{res}":
            page.drawer = drawer
            page.views.append(
                ft.View(
                    route=f"/ads-detail/{res}",
                    padding=ft.padding.all(0),
                    appbar=AppBarView(page, drawer),
                    bottom_appbar=custom_bottom_appbar(page),
                    drawer=drawer,
                    controls=[ProductDetail(page, res)],
                ))

        page.update()

    return route_change


def handle_view_pop(page: ft.Page):
    async def view_pop(view):
        page.views.pop()
        top_view = page.views[-1]
        page.go(top_view.route)

    return view_pop


async def main(page: ft.Page):
    page.window_width = 450
    page.window_height = 800
    page.margin = 0
    page.padding = 0
    page.spacing = 0
    page.bgcolor = "white"

    theme = ft.Theme()
    theme.page_transitions.linux = ft.PageTransitionTheme.CUPERTINO
    theme.page_transitions.android = ft.PageTransitionTheme.CUPERTINO
    page.theme = theme

    drawer = build_drawer(page)

    page.on_route_change = handle_route_change(page, drawer)
    page.on_view_pop = handle_view_pop(page)

    page.go("/homepage")


ft.app(main, assets_dir="assets")

this is the custom  AppBarView

class AppBarView(ft.AppBar):
    def __init__(self, page: ft.Page, drawer: ft.NavigationDrawer):
        super().__init__()
        self.toolbar_height = 80
        self.leading = ft.Container(
            padding=ft.padding.only(left=15, top=15),
            content=ft.Row(
                alignment=ft.MainAxisAlignment.START,
                controls=[
                    ft.Text(
                        "Hello Joseph",
                        color=customTextColor,
                        size=15,
                        weight=ft.FontWeight.W_300,
                    ),
                ],
            ),
        )
        self.leading_width = 40
        self.center_title = False
        self.bgcolor = customPrimaryColor

        self.actions = [
            ft.Container(
                padding=ft.padding.only(right=15, top=15),
                content=ft.Icon(
                    name=ft.Icons.MENU,
                    color=customTextColor,
                ),
                on_click=lambda e: self.page.open(drawer),
            ),
            ft.Stack(
                [
                    ft.Container(
                        padding=ft.padding.only(right=15, top=15),
                        content=ft.Icon(
                            name=ft.Icons.SHOPPING_CART_OUTLINED,
                            color=customTextColor,
                        ),
                    ),
                    ft.Container(
                        padding=ft.padding.all(2),
                        bgcolor="black",
                        left=15,
                        top=3,
                        border_radius=700,
                        content=ft.Text(
                            "3",
                            color="white",
                            size=9,
                            weight=ft.FontWeight.BOLD,
                        ),
                    ),
                ],
                width=30,
                height=30,
            ),
            ft.Container(width=15),
        ]