kivy：在幻灯片过渡开始时播放声音并在按下按钮时停止

Question

i am build a appliaction for my scren to take feed back from people and i want to make annoucement untill a person will come and press start button. the announcement is in mp3 file. i want to play sound when the screen0 appears but want to stop sound when th start button is pressed.how to achieve that please help.

this is main.py file

main.py

from kivy.app import App # Use of fields and methods of Kivy
from kivy.lang import Builder
from kivy.clock import Clock
from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition

class Screen0(Screen):
    pass

class Screen1(Screen):
    pass

class Screen2(Screen):
    pass

class Screen3(Screen):
    pass

class Screen4(Screen):
    pass

class Screen5(Screen):
    def on_start(self):
        Clock.schedule_once(self.change_screen, 0.5)

    def change_screen(self, *kwargs):
         app.root.transition = SlideTransition(direction="left")
         app.root.current = "screen2"
         print("bye BYE")
class ScreenManagement(ScreenManager):
    pass

presentation = Builder.load_file("style.kv")

class MyApp(App):
    def build(self):
        return presentation

myApp = MyApp()
myApp.run()

this is kv file

style.kv

#:import SlideTransition kivy.uix.screenmanager.SlideTransition
ScreenManagement:
    transition: SlideTransition()
    Screen0:
    Screen1:
    Screen2:
    Screen3:
    Screen4:
    Screen5:
<Screen0>:
    name: "screen0"
    FloatLayout:
        Label:
            text: "PLEASE GIVE US YOUR \n VALUABLE FEEDBACK!"
            pos_hint: {"top": 1.2}
            font_size: 48
            color: 1,1,1,1  
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.5, "center_y":.4} 
            text: "START"
            
            background_color: (0.0, 1.0, 0, 1.0)
            font_size: 24
<Screen1>:
    name: "screen1"
    FloatLayout:
        Label:
            text: "WHICH IS YOUR FAVORITE SWEET?"
            pos_hint: {"top": 1.2}
            font_size: 48
            color: 1,1,0,1  
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.2, "center_y":.4} 
            text: "HALDIRAMS \n KAJU KATHALI"
            
            background_color: (0.0, 1.0, 1.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.4, "center_y":.4}
            text: "HALDIRAMS \n SONPAPDI"
            background_color: (1.0, 0.0, 0.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.6, "center_y":.4}
            text: "HALDIRAMS \n BADAM HALWA"
            background_color: (1.0, 1.0, 0.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.8, "center_y":.4}
            text: "HALDIRAMS \n RASGULLA"
            background_color: (0.8, 0.3, 0.4, 1.0)
            font_size: 18
<Screen2>:
    name: "screen2"
    FloatLayout:
        Label:
            text: "AFTER HOW MUCH TIME \n YOU GOT THE ORDER?"
            pos_hint: {"top": 1.2}
            font_size: 48
            color: 1,1,0,1
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen3"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.2, "center_y":.4}
            text: "Immediatly"

            background_color: (0.0, 0.5, 1.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen3"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.4, "center_y":.4}
            text: "In 5 to\n 15 Min"
            background_color: (1.0, 0.4, 0.8, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen3"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.6, "center_y":.4}
            text: "In 15 to\n 30 Min"
            background_color: (1.0, 0.8, 0.4, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen3"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.8, "center_y":.4}
            text: "45 Min or More"
            background_color: (1.0, 0.0, 1.0, 1.0)
            font_size: 18
<Screen3>:
    name: "screen3"
    FloatLayout:
        Label:
            text: "HOW WAS THE BEHAVIOUR \n OF MANAGER/SERVENT?"
            pos_hint: {"top": 1.2}
            font_size: 48
            color: 1,1,0,1
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen4"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.2, "center_y":.4}
            text: "VERY GOOD"

            background_color: (0.0, 0.5, 1.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen4"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.4, "center_y":.4}
            text: "GOOD"
            background_color: (1.0, 0.8, 0.4, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen4"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.6, "center_y":.4}
            text: "NOT SO \nGOOD"
            background_color: (1.0, 0.4, 0.8, 1.0)
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen4"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.8, "center_y":.4}
            text: "VERY BAD"
            background_color: (1.0, 1.0, 0.0, 1.0)
<Screen4>:
    name: "screen4"
    FloatLayout:
        Label:
            text: "WILL YOU AGAIN SHOP IN \n OUR STORE?"
            pos_hint: {"top": 1.2}
            font_size: 48
            color: 1,1,0,1
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen5"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.2, "center_y":.4}
            text: "DEFINETLY"

            background_color: (0.5, 1, 1.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen5"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.4, "center_y":.4}
            text: "YES"
            background_color: (1.0, 0.0, 0.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen5"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.6, "center_y":.4}
            text: "NO"
            background_color: (1.0, 1.0, 0.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen5"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.8, "center_y":.4}
            text: "CANT SAY"
            background_color: (1.0, 0.0, 1.0, 1.0)
            font_size: 18
<Screen5>:
    name: "screen5"
    FloatLayout:
        Label:
            text: "!!!THANK YOU FOR YOUR\n FEEDBACK+ \n HAVE A NICE DAY!!!"
            pos_hint: {"top":1.2}
            font_size: 48
            color: 1,1,1,1

please share some suggestions

Answer 1

In your MyApp add the code to handle the sound:

class MyApp(App):
    def build(self):
        self.sound = SoundLoader.load('test.mp3')
        self.sound.loop = True
        self.sound.play()
        return presentation

    def stop_sound(self):
        self.sound.stop()

Then, in your 'kv' change the Start Button rule to:

    Button:
        on_release:
            app.root.transition = SlideTransition(direction="left")
            app.root.current = "screen2"
            app.stop_sound()
        size_hint: 0.2, 0.8/3
        pos_hint: {"center_x":0.5, "center_y":.4} 
        text: "START"