【发布时间】：2021-03-27 14:57:01
【问题描述】：
我做了一个Android小应用程序，负责扫描Wi-Fi网络，该应用程序运行良好，问题是我不知道每次有新网络时如何添加小部件。 我想要的是每次有一个新的Wi-Fi网络时，都会出现一个带有该Wi-Fi网络数据的新小部件，我不知道我是否解释自己，在我的例子中我在上面放了几个透明按钮其中按钮文本是wifi网络，不好的是当有4个或更少的wifi网络时按钮仍然存在，我希望每个新的wifi网络都添加一个带有wifi网络信息的按钮，我是还在学习 kivy 我需要帮助谢谢！
import kivymd
'''
from android.permissions import request_permissions, Permission
request_permissions([Permission.READ_EXTERNAL_STORAGE, Permission.WRITE_EXTERNAL_STORAGE, Permission.CHANGE_WIFI_STATE, Permission.ACCESS_WIFI_STATE, Permission.ACCESS_FINE_LOCATION, Permission.ACCESS_COARSE_LOCATION])
'''
from kivymd.app import MDApp
import jnius
from kivymd.uix.toolbar import MDToolbar
from kivy.uix.screenmanager import ScreenManager, Screen
from kivymd.uix.dialog import MDDialog
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from kivy.core.window import Window
from kivymd.uix.button import MDFlatButton
from kivy.properties import ObjectProperty
from kivy.uix.scrollview import ScrollView
from kivy.uix.label import Label
#from kivy.utils import platform
from jnius import autoclass
Builder.load_string('''
<Principal>:
MDToolbar:
title: 'WifiScan'
pos_hint: {'center_x': .5, 'center_y': .97}
right_action_items: [['reload',lambda x: root.wifi()]]
MDFlatButton:
text: 'Disabled'
pos_hint: {"center_x": .5, "center_y": .15}
on_press:
root.wifi()
root.desconecta()
MDFlatButton:
id: boton
text: ''
size_hint: 12, .10
on_press: root.info()
pos_hint: {"center_x": .4, "center_y": .85}
MDFlatButton:
id: boton2
size_hint: 12, .10
text: ''
on_press: root.info2()
pos_hint: {"center_x": .4, "center_y": .75}
MDFlatButton:
id: boton3
size_hint: 12, .10
text: ''
on_press: root.info3()
pos_hint: {"center_x": .4, "center_y": .65}
MDFlatButton:
id: boton4
text: ''
size_hint: 12, .10
on_press: root.info3()
user_font_size: '16sp'
pos_hint: {"center_x": .4, "center_y": .55}
MDFlatButton:
id: boton5
text: ''
on_press: root.info4()
size_hint: 12, .10
user_font_size: '16sp'
pos_hint: {"center_x": .4, "center_y": .45}
Label:
id: label1
text: ""
pos_hint: {"center_x": .1, "center_y": .85}
Label:
id: label2
text: ""
pos_hint: {"center_x": .1, "center_y": .75}
Label:
id: label3
text: ""
pos_hint: {"center_x": .1, "center_y": .65}
Label:
id: label4
text: ""
pos_hint: {"center_x": .1, "center_y": .55}
Label:
id: label5
text: ""
pos_hint: {"center_x": .1, "center_y": .45}
''')
class Principal(Screen):
def __init__(self, **kwargs):
super(Principal, self).__init__(**kwargs)
try:
def wifi(self):
PythonActivity = autoclass('org.renpy.android.PythonActivity')
WifiManager = autoclass('android.net.wifi.WifiManager')
activity = PythonActivity.mActivity
service = activity.getSystemService(PythonActivity.WIFI_SERVICE)
service.startScan()
variable = WifiManager.getScanResults()
for i in range(0,variable.size()-1):
nameymac = variable.get(i).SSID+'\n'+variable.get(i).BSSID
level1 = str(variable.get(i).level)
chanel = str(variable.get(i).channelWidth)
wps = str(variable.get(i).capabilities)
# wpa2 = wps.replace('WPA2', 'WPA2')
self.Capa = str(variable.get(i).capabilities)
self.ids.label1.text = " "+ level1#+"\n" + wpa2[1:5]
self.ids.boton.text = nameymac
for i in range(0,variable.size()-2):
self.nameymac2 = variable.get(i).SSID+'\n'+variable.get(i).BSSID
level2 = str(variable.get(i).level)
self.Capa2 = str(variable.get(i).capabilities)
self.ids.label2.text = level2
self.ids.boton2.text = self.nameymac2
for i in range(0,variable.size()-3):
nameymac3 = variable.get(i).SSID+'\n'+variable.get(i).BSSID
level3 = str(variable.get(i).level)
self.Capa3 = str(variable.get(i).capabilities)
self.ids.label3.text = level3
self.ids.boton3.text = nameymac3
for i in range(0,variable.size()-4):
nameymac4 = variable.get(i).SSID+'\n'+variable.get(i).BSSID
level4 = str(variable.get(i).level)
self.Capa4 = str(variable.get(i).capabilities)
self.ids.label4.text = level4
self.ids.boton4.text = nameymac4
for i in range(0,variable.size()-5):
nameymac5 = variable.get(i).SSID+'\n'+variable.get(i).BSSID
level5 = str(variable.get(i).level)
self.Capa5 = str(variable.get(i).capabilities)
self.ids.label5.text = level5
self.ids.boton5.text = nameymac5
except:
pass
def desconecta(self):
PythonActivity = autoclass('org.renpy.android.PythonActivity')
WifiManager = autoclass('android.net.wifi.WifiManager')
activity = PythonActivity.mActivity
service = activity.getSystemService(PythonActivity.WIFI_SERVICE)
service.disconnect()
service.reconnect()
def info(self):
#if self.ids.boton.text != "":
self.msg = MDDialog(
type='custom',
size_hint=(.9, .1),
text=self.ids.boton.text +"\n\n"
+"Seguridad: \n"+self.Capa)
self.msg.open()
def info2(self):
# if self.ids.boton2.text != "":
self.msg = MDDialog(
type='custom',
size_hint=(.9, .1),
text=self.ids.boton2.text +"\n\n"
+"Seguridad: \n"+self.Capa2
)
self.msg.open()
def info3(self):
# if self.ids.boton3.text != "":
self.msg = MDDialog(
type='custom',
size_hint=(.9, .1),
text=self.ids.boton3.text +"\n\n"
+"Seguridad: \n"+self.Capa3
)
self.msg.open()
def info4(self):
# if self.ids.boton4.text != "":
self.msg = MDDialog(
type='custom',
size_hint=(.9, .1),
text=self.ids.boton4.text +"\n\n"
+"Seguridad: \n"+self.Capa4
)
self.msg.open()
def info5(self):
#if self.ids.boton5.text != "":
self.msg = MDDialog(
type='custom',
size_hint=(.9, .1),
text=self.ids.boton5.text +"\n\n"
+"Seguridad: \n"+self.Capa5
)
self.msg.open()
'''
def del_widget(self):
if self.ids.boton.text == self.ids.boton2.text or self.ids.boton =='':
self.remove_widget(self.ids.boton)
self.remove_widget(self.ids.boton2)
self.ids.label1.text = ""
self.ids.label2.text = ""
else:
pass
if self.ids.boton3.text ==self.ids.boton4.text or self.ids.boton3.text=='':
self.remove_widget(self.ids.boton3)
self.ids.label3.text = ""
self.remove_widget(self.ids.boton4)
self.ids.label4.text = ""
else:
pass
if self.ids.boton5.text ==self.ids.boton4.text or self.ids.boton5.text =="":
self.remove_widget(self.ids.boton5)
self.ids.label5.text = ""
else:
pass
'''
class Runnin(MDApp):
def build(self):
self.theme_cls.theme_style = 'Dark'
sm = ScreenManager ()
principal = Principal(name='principal')
sm.add_widget(principal)
return sm
Runnin().run()
【问题讨论】：