Question

我在Ubuntu上使用kivy v1.10.1，buildozer 0.39和python 3.5.2。

我有一个非常基本的kivy应用程序

Future getImage(ImageSource imageSource) async {
// using your method of getting an image
final File image = await ImagePicker.pickImage(source: imageSource);

// getting a directory path for saving
final String path = await getApplicationDocumentsDirectory().path;

// copy the file to a new path
final File newImage = await image.copy('$path/image1.png');

setState(() {
  _image = newImage;
});}

buildozer规范包括：

from kivy.app import App
from kivy.uix.screenmanager import Screen
from kivy.uix.button import Label
from kivy.lang import Builder

root = Builder.load_string('''
<MainFrame>:
    Label:
        text: 'Hello world'
''')

class MainFrame(Screen):
    def __init__(self, **kwargs):
        super(MainFrame, self).__init__(**kwargs)

class BasicApp(App):
    def build(self):
        return MainFrame()

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

我可以使用buildozer构建APK，但是当我在android设备上运行它时，它似乎已加载，但随后停止了。

这似乎是logcat输出的相关部分

requirements = python3, kivy

完整的logcat文本位于：

https://justpaste.it/7hge7

有人可以指出问题的可能根源吗？

Answer 1

logcat中的实际回溯是这一部分：

08-31 14:29:28.636 29017 29035 I python  :  Traceback (most recent call last):
08-31 14:29:28.636 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/app/main.py", line 21, in <module>
08-31 14:29:28.637 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/app.py", line 829, in run
08-31 14:29:28.637 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/app/main.py", line 18, in build
08-31 14:29:28.638 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/app/main.py", line 14, in __init__
08-31 14:29:28.638 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/uix/relativelayout.py", line 265, in __init__
08-31 14:29:28.639 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/uix/floatlayout.py", line 65, in __init__
08-31 14:29:28.639 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/uix/layout.py", line 76, in __init__
08-31 14:29:28.639 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/uix/widget.py", line 361, in __init__
08-31 14:29:28.640 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/uix/widget.py", line 469, in apply_class_lang_rules
08-31 14:29:28.640 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/lang/builder.py", line 538, in apply
08-31 14:29:28.641 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/lang/builder.py", line 654, in _apply_rule
08-31 14:29:28.641 29017 29035 I python  :    File "kivy/_event.pyx", line 188, in kivy._event.EventDispatcher.__cinit__
08-31 14:29:28.641 29017 29035 I python  :    File "kivy/properties.pyx", line 447, in kivy.properties.Property.link
08-31 14:29:28.642 29017 29035 I python  :    File "kivy/properties.pyx", line 632, in kivy.properties.NumericProperty.init_storage
08-31 14:29:28.642 29017 29035 I python  :    File "kivy/properties.pyx", line 418, in kivy.properties.Property.init_storage
08-31 14:29:28.642 29017 29035 I python  :    File "kivy/properties.pyx", line 655, in kivy.properties.NumericProperty.convert
08-31 14:29:28.643 29017 29035 I python  :    File "kivy/properties.pyx", line 663, in kivy.properties.NumericProperty.parse_str
08-31 14:29:28.643 29017 29035 I python  :    File "kivy/properties.pyx", line 670, in kivy.properties.NumericProperty.parse_list
08-31 14:29:28.643 29017 29035 I python  :    File "kivy/properties.pyx", line 296, in kivy.properties.dpi2px
08-31 14:29:28.644 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/utils.py", line 505, in __get__
08-31 14:29:28.645 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/kivy/metrics.py", line 162, in dpi
08-31 14:29:28.645 29017 29035 I python  :    File "/home/jeff/projects/basic_kivy_app/.buildozer/android/platform/build/build/python-installs/myapp/jnius/__init__.py", line 12, in <module>
08-31 14:29:28.646 29017 29035 I python  :  ImportError: dlopen failed: library "libpython2.7.so" not found
08-31 14:29:28.646 29017 29035 I python  : Python for android ended.

我不知道是什么原因造成的。看起来pyjnius与python2.7链接在一起，但我不知道为什么会这样（并且p4a应该特别注意不会发生这种情况）。这是您尝试的第一个版本吗？如果您清理所有内容并再次运行，会发生同样的事情吗？

Answer 2

通过删除.buildozer文件夹并重新启动，解决了该问题。

我想我以前是这样的：

requirements = python2, kivy

在buildozer.spec中，当我遇到问题时，将其更改为：

 requirements = python3, kivy

但未删除.buildozer文件夹。

这大概引起了问题中涉及的问题。

我提供了这个答案，以鼓励可能遇到类似问题的其他人删除.buildozer文件夹，并从干净的构建开始，然后再寻求帮助。我本来应该想到的。

当Kivy应用在Android上停止时，logcat输出无用

2 个答案: