我最近开始使用我已经在我的电脑上用 kivy 编写的一些程序来定位 android，但是在我的手机上构建和安装之后，我发现 urllib 似乎不接受我提供给它的任何 url，尽管事实上它在我的电脑上完美运行。此外，任何使用 urllib 连接到互联网的 kivy 小部件都以完全相同的方式失败。
下面是一些示例代码:
from kivy.app import App
from kivy.uix.image import AsyncImage
class TestApp(App):
def build(self):
return AsyncImage(source="http://kivy.org/logos/kivy-logo-black-64.png")
TestApp().run()
当应用程序运行时，这会出现在 logcat 中:
11-07 15:50:10.400 3741 4686 I python : [INFO ] [GL ]
Using the "OpenGL ES 2" graphics system
11-07 15:50:10.400 3741 4686 I python : [INFO ] [GL ]
Backend used <gl>
11-07 15:50:10.410 3741 4686 I python : [INFO ] [GL ]
OpenGL version <b'OpenGL ES 3.1 V@140.0 (GIT@Ifd751822f5)'>
11-07 15:50:10.410 3741 4686 I python : [INFO ] [GL ]
OpenGL vendor <b'Qualcomm'>
11-07 15:50:10.410 3741 4686 I python : [INFO ] [GL ]
OpenGL renderer <b'Adreno (TM) 420'>
11-07 15:50:10.410 3741 4686 I python : [INFO ] [GL ]
OpenGL parsed version: 3, 1
11-07 15:50:10.410 3741 4686 I python : [INFO ] [GL ]
Texture max size <16384>
11-07 15:50:10.410 3741 4686 I python : [INFO ] [GL ]
Texture max units <16>
11-07 15:50:10.470 3741 4686 I python : [INFO ] [Window ]
auto add sdl2 input provider
11-07 15:50:10.470 3741 4686 I python : [INFO ] [Window ]
virtual keyboard not allowed, single mode, not docked
11-07 15:50:10.550 3741 4686 I python : [INFO ] [Loader ]
using a thread pool of 2 workers
11-07 15:50:10.720 3741 4686 I python : [WARNING] [Base ]
Unknown <android> provider
11-07 15:50:10.720 3741 4686 I python : [INFO ] [Base ] Start application main loop
11-07 15:50:10.740 3741 4686 I python : [ERROR ] [Base ] Failed to import "android" module. Could not remove android presplash.
11-07 15:50:12.130 3741 4943 I python : [ERROR ] [Loader ] Failed to load image <http://kivy.org/logos/kivy-logo-black-64.png>
11-07 15:50:12.130 3741 4943 I python : Traceback (most recent call last):
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/site-packages/kivy/loader.py", line 317, in _load_urllib
11-07 15:50:12.130 3741 4943 I python : fd = urllib_request.urlopen(filename)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 162, in urlopen
11-07 15:50:12.130 3741 4943 I python : return opener.open(url, data, timeout)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 471, in open
11-07 15:50:12.130 3741 4943 I python : response = meth(req, response)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 581, in http_response
11-07 15:50:12.130 3741 4943 I python : 'http', request, response, code, msg, hdrs)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 503, in error
11-07 15:50:12.130 3741 4943 I python : result = self._call_chain(*args)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 443, in _call_chain
11-07 15:50:12.130 3741 4943 I python : result = func(*args)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 686, in http_error_302
11-07 15:50:12.130 3741 4943 I python : return self.parent.open(new, timeout=req.timeout)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 465, in open
11-07 15:50:12.130 3741 4943 I python : response = self._open(req, data)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 488, in _open
11-07 15:50:12.130 3741 4943 I python : 'unknown_open', req)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 443, in _call_chain
11-07 15:50:12.130 3741 4943 I python : result = func(*args)
11-07 15:50:12.130 3741 4943 I python : File "/data/user/0/org.lgt.lgt/files/app/crystax_python/stdlib.zip/urllib/request.py", line 1310, in unknown_open
11-07 15:50:12.130 3741 4943 I python : raise URLError('unknown url type: %s' % type)
11-07 15:50:12.130 3741 4943 I python : urllib.error.URLError: <urlopen error unknown url type: https>
这对我来说是一个非常奇怪的错误，因为我提交的 url 是 http 而不是 https
这是我的 buildozer 规范文件 link
请您参考如下方法:
您尝试加载的网址 (http://kivy.org/logos/kivy-logo-black-64.png) 使用 https 协议(protocol) (只需将其加载到浏览器中即可查看)。
要在 Android 上使用 https 加载 url，您应该构建支持 OpenSSL 的 apk。
在 Python 2 上，可以通过在 buildozer 的要求中添加 openssl 来实现。
我不确定它是否适用于 python3crystax。
