Как сделать изображение и отобразить его на следующей странице - PullRequest
Новая
       19

Как сделать изображение и отобразить его на следующей странице

1 голос
/ 08 апреля 2019

Добрый день, я написал простую программу для камеры, используя Python и Kivy, но я просто не могу сделать снимок.Вам нужно сделать снимок «ScreenThree» (сохранить его в памяти телефона) и отобразить полученное изображение на «ScreenFour».

Я использую kivy.uix.camera для отображения камеры, kivymd и kv для создания интерфейса.android.permissions: INTERNET, CAMERA, WRITE_EXTERNAL_STORAGE, READ_EXTERNAL_STORAGE 

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.camera import Camera
from kivymd.theming import ThemeManager

import time

Builder.load_string("""
#:import MDFillRoundFlatButton kivymd.button.MDFillRoundFlatButton
#:import MDIconButton kivymd.button.MDIconButton
<ScreenOne@Screen>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        MDFillRoundFlatButton:
            color: [1,1,1,1]
            text: "Перейти к созданию фото"
            pos_hint: {'center_x':.50, 'center_y':.50}
            on_press:
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_two'

<ScreenTwo@Screen>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        MDFillRoundFlatButton:
            color: [1,1,1,1]
            text: "Выбрать фон"
            pos_hint: {'center_x':.50, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_three'
        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_one'

<ScreenThree@Screen>:
    id: entry
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        Camera:
            id: camera
            index: 0
            resolution: (1280,720)
            play: True  
        MDFillRoundFlatButton:
            text: "take photo"
            pos_hint: {'center_x': 0.50, 'center_y': .10}
            on_press:
                root.capture()   #TAKE PHOTO
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_four'    
        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_two'

<ScreenFour@Screen>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
# HERE I NEED TO DISPLAY THE IMAGE
        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_three'
""")


class ScreenOne(Screen):
    pass


class ScreenTwo(Screen):
    theme_cls = ThemeManager()
    theme_cls.primary_palette = 'Blue'
    main_widget = None

class ScreenThree(Screen):
    theme_cls = ThemeManager()
    theme_cls.primary_palette = 'Blue'
    main_widget = None

    def capture(self):
        camera = self.ids['camera']
        timestr = time.strftime("%Y%m%d_%H%M%S")
        photo = camera.export_to_png("IMG_{}.png".format(timestr))
        print("Captured")



class ScreenFour(Screen):
    pass


screen_manager = ScreenManager()


screen_manager.add_widget(ScreenOne(name="screen_one"))
screen_manager.add_widget(ScreenTwo(name="screen_two"))
screen_manager.add_widget(ScreenThree(name="screen_three"))
screen_manager.add_widget(ScreenFour(name="screen_four"))


class Interface(App):

    def build(self):
        return screen_manager

sample_app = Interface()
sample_app.run()

Скажите, пожалуйста, как я могу изменить код для выполнения задачи.

Ошибка

Сфотографируйте Белый экран 

04-08 21:15:19.925   796 13801 E mm-camera: <STATS_AF ><ERROR> 959: af_spd_detect_process: ERROR! SPOT_LIGHT_FLAG =0!!! :AEC_grid = 256, BG_grid = 3072, ave luma = 0
04-08 21:15:19.933   835   902 W SurfaceFlinger: EventThread: dropping event (7673796e) for connection 0x7b332278c0
04-08 21:15:19.949   835   902 W SurfaceFlinger: EventThread: dropping event (7673796e) for connection 0x7b332278c0
04-08 21:15:19.959   796 13801 E mm-camera: <STATS_AF ><ERROR> 959: af_spd_detect_process: ERROR! SPOT_LIGHT_FLAG =0!!! :AEC_grid = 256, BG_grid = 3072, ave luma = 0
04-08 21:15:19.966   835   902 W SurfaceFlinger: EventThread: dropping event (7673796e) for connection 0x7b332278c0
04-08 21:15:19.983   835   902 W SurfaceFlinger: EventThread: dropping event (7673796e) for connection 0x7b332278c0
04-08 21:15:19.992   796 13801 E mm-camera: <STATS_AF ><ERROR> 959: af_spd_detect_process: ERROR! SPOT_LIGHT_FLAG =0!!! :AEC_grid = 256, BG_grid = 3072, ave luma = 0
04-08 21:15:19.999   835   902 W SurfaceFlinger: EventThread: dropping event (7673796e) for connection 0x7b332278c0

Ошибка2 

04-09 08:27:25.140   796  6243 E mm-camera: <STATS_AF ><ERROR> 959: af_spd_detect_process: ERROR! SPOT_LIGHT_FLAG =0!!! :AEC_grid = 256, BG_grid = 3072, ave luma = 0
04-09 08:27:25.146   835   902 W SurfaceFlinger: EventThread: dropping event (7673796e) for connection 0x7b32a54420
04-09 08:27:25.146  6164  6198 I python  : Captured
04-09 08:27:25.147  6164  6198 I python  : [ERROR  ] [Image       ] Error reading file IMG_20190409_082724.png
04-09 08:27:25.162   835   902 W SurfaceFlinger: EventThread: dropping event (7673796e) for connection 0x7b32a54420
04-09 08:27:25.175   796  6243 E mm-camera: <STATS_AF ><ERROR> 959: af_spd_detect_process: ERROR! SPOT_LIGHT_FLAG =0!!! :AEC_grid = 256, BG_grid = 3072, ave luma = 0
04-09 08:27:25.179   835   902 W SurfaceFlinger: EventThread: dropping event (7673796e) for connection 0x7b32a54420

Ответы [ 2 ]

0 голосов
/ 08 апреля 2019

Доступ к фото

Ссылка на фотографию с использованием следующего: 

class ScreenFour(Screen):

    def on_pre_enter(self, *args):
        self.ids.img.source = self.manager.ids.entry.photo

Решение

Примечание 

<class-name@widget>:

Это динамический класс . При использовании динамического класса нет необходимости в определении класса в скрипте Python.

файл кв

  • Измените все динамические классы на правило класса, удалив все @Screen.
  • Добавить правило класса, <ScreenManagement>:
  • Создание всех экранов как дочерних для правила класса, <ScreenManagement>:
  • Добавить id: entry для созданного экземпляра, ScreenThree:
  • Instantiate, Image: как потомок FloatLayout: правила класса, <ScreenFour>:
  • Добавить id: img под инстанцированного ребенка, Image:

Отрывки 

#:import MDIconButton kivymd.button.MDIconButton

<ScreenManagement>:
    ScreenOne:
        name: "screen_one"
    ScreenTwo:
        name: "screen_two"
    ScreenThree:
        id: entry
        name: "screen_three"
    ScreenFour:
        name: "screen_four"
...

<ScreenFour>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size

    FloatLayout:
        Image:
            id: img

Py file

  • Добавить заявление на импорт, from os.path import dirname
  • Добавить выписку об импорте, from kivy.properties import StringProperty
  • Добавить class ScreenManagement()
  • Удалить все ссылки на screen_manager
  • Объявить атрибут класса, photo = StringProperty('') в class ScreenThree()
  • Инициализировать атрибут класса, self.photo = f"{dirname(__file__)}/IMG_{time.strftime('%Y%m%d_%H%M%S')}.png"
  • Реализация метода on_pre_enter() для отображения фотографии.

Отрывки 

from os.path import dirname
from kivy.properties import StringProperty
...
class ScreenThree(Screen):
    photo = StringProperty('')

    def capture(self):
        camera = self.ids['camera']
        self.photo = f"{dirname(__file__)}/IMG_{time.strftime('%Y%m%d_%H%M%S')}.png"
        camera.export_to_png(self.photo)
        print("Captured")


class ScreenFour(Screen):

    def on_pre_enter(self, *args):
        self.ids.img.source = self.manager.ids.entry.photo


class ScreenManagement(ScreenManager):
    pass


class Interface(App):

    def build(self):
        return ScreenManagement()
* * Пример тысяча семьдесят-одна * * тысяча семьдесят две

main.py 

from os.path import dirname
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivymd.theming import ThemeManager
from kivy.properties import StringProperty

import time

Builder.load_string("""
#:import MDFillRoundFlatButton kivymd.button.MDFillRoundFlatButton
#:import MDIconButton kivymd.button.MDIconButton

<ScreenManagement>:
    ScreenOne:
        name: "screen_one"
    ScreenTwo:
        name: "screen_two"
    ScreenThree:
        name: "screen_three"
        id: entry
    ScreenFour:
        name: "screen_four"

<ScreenOne>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        MDFillRoundFlatButton:
            color: [1,1,1,1]
            text: "Перейти к созданию фото"
            pos_hint: {'center_x':.50, 'center_y':.50}
            on_press:
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_two'

<ScreenTwo>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        MDFillRoundFlatButton:
            color: [1,1,1,1]
            text: "Выбрать фон"
            pos_hint: {'center_x':.50, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_three'
        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_one'

<ScreenThree>:
    id: entry
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        Camera:
            id: camera
            index: 0
            resolution: (1280,720)
            play: True  
        MDFillRoundFlatButton:
            text: "take photo"
            pos_hint: {'center_x': 0.50, 'center_y': .10}
            on_press:
                root.capture()   #TAKE PHOTO
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_four'    
        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_two'

<ScreenFour>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        Image:
            id: img

        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_three'
""")


class ScreenOne(Screen):
    pass


class ScreenTwo(Screen):
    theme_cls = ThemeManager()
    theme_cls.primary_palette = 'Blue'
    main_widget = None


class ScreenThree(Screen):
    theme_cls = ThemeManager()
    theme_cls.primary_palette = 'Blue'
    main_widget = None
    photo = StringProperty('')

    def capture(self):
        camera = self.ids['camera']
        self.photo = f"{dirname(__file__)}/IMG_{time.strftime('%Y%m%d_%H%M%S')}.png"
        camera.export_to_png(self.photo)
        print("Captured")


class ScreenFour(Screen):

    def on_pre_enter(self, *args):
        self.ids.img.source = self.manager.ids.entry.photo


class ScreenManagement(ScreenManager):
    pass


class Interface(App):

    def build(self):
        return ScreenManagement()


sample_app = Interface()
sample_app.run()

выход

Photo

0 голосов
/ 08 апреля 2019 
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.camera import Camera
from kivymd.theming import ThemeManager

import time

filename = ''
screenfour = ''

Builder.load_string("""
#:import MDFillRoundFlatButton kivymd.button.MDFillRoundFlatButton
#:import MDIconButton kivymd.button.MDIconButton
<ScreenOne@Screen>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        MDFillRoundFlatButton:
            color: [1,1,1,1]
            text: "Перейти к созданию фото"
            pos_hint: {'center_x':.50, 'center_y':.50}
            on_press:
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_two'

<ScreenTwo@Screen>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        MDFillRoundFlatButton:
            color: [1,1,1,1]
            text: "Выбрать фон"
            pos_hint: {'center_x':.50, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_three'
        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_one'

<ScreenThree@Screen>:
    id: entry
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        Camera:
            id: camera
            index: 0
            resolution: (1280,720)
            play: True
        MDFillRoundFlatButton:
            text: "take photo"
            pos_hint: {'center_x': 0.50, 'center_y': .10}
            on_press:
                root.capture()   #TAKE PHOTO
                root.manager.transition.direction = 'up'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_four'
        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_two'

<ScreenFour@Screen>:
    canvas:
        Color:
            rgb: [.30,.50,.99]
        Rectangle:
            pos: self.pos
            size: self.size
    FloatLayout:
        Image:
            size: root.width, root.height
            source: ''
            id: imageWid
        MDIconButton:
            icon: 'chevron-double-right'
            pos_hint: {'center_x':.95, 'center_y':.10}
            on_press:
                root.manager.transition.direction = 'down'
                root.manager.transition.duration = 1
                root.manager.current = 'screen_three'
""")


class ScreenOne(Screen):
    pass


class ScreenTwo(Screen):
    theme_cls = ThemeManager()
    theme_cls.primary_palette = 'Blue'
    main_widget = None

class ScreenThree(Screen):
    theme_cls = ThemeManager()
    theme_cls.primary_palette = 'Blue'
    main_widget = None

    def capture(self):
        camera = self.ids['camera']
        timestr = time.strftime("%Y%m%d_%H%M%S")
        photo = camera.export_to_png("IMG_{}.png".format(timestr))
        global filename, screenfour
        filename = "IMG_{}.png".format(timestr)
        print("Captured")
        screenfour.update()

class ScreenFour(Screen):
    def __init__(self, **kwargs):
        super(ScreenFour, self).__init__(**kwargs)
        global screenfour
        screenfour = self

    def update(self, *args):
        global filename
        imageWidget = self.ids['imageWid']
        imageWidget.source = filename

screen_manager = ScreenManager()

screen_manager.add_widget(ScreenOne(name="screen_one"))
screen_manager.add_widget(ScreenTwo(name="screen_two"))
screen_manager.add_widget(ScreenThree(name="screen_three"))
screen_manager.add_widget(ScreenFour(name="screen_four"))

class Interface(App):

    def build(self):
        return screen_manager

sample_app = Interface()
sample_app.run()

Вы бы создали переменную global, чтобы сохранить имя файла изображения, а затем виджет Image в вашем экране Screen, где вы бы обновили источник виджета изображения до имени файла изображенияты взял.Не стесняйтесь обращаться ко мне, если возникнут какие-либо вопросы

...