在下面的代码中,我根据kivy文档关于将数据存储到JSON文件中的说明 我收到有关目录的错误。我比较新鲜,过去几天我都被困住了 错误是 - >
文件" main.py",第44行data_dir = getattr(self,' / storage / emulated / 0 /')#get一个可写路径来保存文件^ IndentationError :意外缩进
__version__ = '1.0' #declare the app version. Will be used by buildozer
from kivy.app import App #for the main app
from kivy.uix.floatlayout import FloatLayout #the UI layout
from kivy.uix.label import Label #a label to show information
from plyer import accelerometer #object to read the accelerometer
from kivy.clock import Clock #clock to schedule a method
from kivy.storage.jsonstore import JsonStore
from os.path import join
class UI(FloatLayout):#the app ui
def __init__(self, **kwargs):
super(UI, self).__init__(**kwargs)
self.lblAcce = Label(text="Accelerometer: ") #create a label at the center
self.add_widget(self.lblAcce) #add the label at the screen
try:
accelerometer.enable() #enable the accelerometer
# if you want do disable it, just run: accelerometer.disable()
Clock.schedule_interval(self.update, 2.0/1) #24 calls per second
except:
self.lblAcce.text = "Failed to start accelerometer" #error
def update(self, dt):
txt = ""
try:
txt = "Accelerometer:\nX = %.2f\nY = %.2f\nZ = %2.f " %(
accelerometer.acceleration[0], #read the X value
accelerometer.acceleration[1], # Y
accelerometer.acceleration[2]) # Z
data_dir = getattr(self, '/storage/emulated/0/') #get a writable path to save the file
store = JsonStore(join(data_dir, 'user.json'))
store.put('x',accelerometer.acceleration[0])
store.put('y',accelerometer.acceleration[1])
store.put('z',accelerometer.acceleration[2])
except:
txt = "Cannot read accelerometer!" #error
self.lblAcce.text = txt #add the correct text
class Accelerometer(App): #our app
def build(self):
ui = UI()# create the UI
return ui #show it
if __name__ == '__main__':
Accelerometer().run() #start our app
答案 0 :(得分:1)
在我的更新功能中,我将错误的arrguemnts传递给json商店。
json.put('a')
这是将Android设备的路径传递给json商店的方法
#define Center(x) CGPointMake(CGRectGetMidX(x), CGRectGetMidY(x));
它将把这个角色放在hello.json的android mobile的内部存储中。