手把手教你使用Python打造移动应用

# 安装 Kivy（Python 3.7+ 环境）
pip install kivy
# 安装打包工具（Android 专用）
pip install buildozer
# 注意：Linux 系统需额外安装依赖（Mac/Win 推荐用 Docker 避坑）

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.label import Label
import requests  # 用于调用天气 API

class WeatherApp(App):
    def build(self):
        # 创建垂直布局
        layout = BoxLayout(orientation='vertical', padding=20)
        
        # 添加标题
        self.title_label = Label(text="Python 天气查询", font_size=24)
        layout.add_widget(self.title_label)
        
        # 添加结果标签
        self.result_label = Label(text="点击按钮获取天气", font_size=18)
        layout.add_widget(self.result_label)
        
        # 添加查询按钮
        btn = Button(text="查询北京天气", size_hint=(1, 0.3))
        btn.bind(on_press=self.get_weather)
        layout.add_widget(btn)
        
        return layout

    def get_weather(self, instance):
        try:
            # 调用免费天气 API（替换你的 API key）
            api_url = "https://api.openweathermap.org/data/2.5/weather?q=Beijing&appid=YOUR_API_KEY&units=metric"
            response = requests.get(api_url).json()
            temp = response['main']['temp']
            self.result_label.text = f"北京当前温度: {temp}°C"
        except Exception as e:
            self.result_label.text = "查询失败: " + str(e)

if __name__ == '__main__':
    WeatherApp().run()

python app.py  # 会弹出桌面窗口，点击按钮测试功能

buildozer init

title = Python天气APP
package.name = weatherapp
package.domain = org.example
source.dir = .  # 当前目录
requirements = python3,kivy,requests  # 依赖库
android.permissions = INTERNET  # 必须添加网络权限

buildozer -v android debug

# 安装
pip install briefcase
# 创建项目
briefcase new
# 按提示填写项目信息（选择 iOS/Android）
# 编写代码（src/helloworld/app.py）
from toga import App, Label, Box
class HelloWorld(App):
    def startup(self):
        box = Box()
        box.add(Label('Hello from Python!', style=Pack(text_align='center')))
        self.main_window = toga.MainWindow(title=self.formal_name)
        self.main_window.content = box
        self.main_window.show()
# 打包 Android
briefcase build android
briefcase run android