如何使用 KivyMD 在 android 中检测手机锁定/解锁？

Question

我正在尝试做一个应用程序，需要在用户锁定手机时保存一些数据，然后在手机解锁时读取，def on_pause 和def on_resume 可以工作吗？

Answer 1

在 buildozer.spec 中输入：

要求 = kivy==2.0.0、jnius、kivymd、android

android.minapi = 21

from kivy.lang import Builder
from kivy.utils import platform
from kivymd.app import MDApp

if platform == 'android':
    from jnius import autoclass
    PowerManager = autoclass('android.os.PowerManager')
    Context = autoclass("android.content.Context")
    context = autoclass("org.kivy.android.PythonActivity").mActivity

KV = """
Screen:
    MDLabel:
        id: label
        text: 'Screen states:'
        halign: 'center'
"""


class TestApp(MDApp):
    def build(self):
        return Builder.load_string(KV)

    def check_is_phone_lock(self):
        if platform == 'android':
            try:
                powerManager = context.getSystemService(Context.POWER_SERVICE)
                isScreenOn = powerManager.isInteractive()
                print(f'isScreenOn: {isScreenOn}')
                screen_state = 'Off' if isScreenOn is False else 'On'
                self.root.ids.label.text += f'\nscreen - {screen_state}'
                return screen_state
            except Exception as err:
                return str(err)

    def on_pause(self):
        self.check_is_phone_lock()
        return True

    def on_resume(self):
        self.check_is_phone_lock()


TestApp().run()