android 上的 Kivy 应用仅加载（3 秒）然后自行关闭
Kivy app on android only loads (3 seconds) and then closes itself
已解决问题：
I would like to ask about a Kivy-Python app just built using
buildozer on the Oracle virtual machine. The app is written in
Windows, python 3 using kivy and depends on numpy, and some
.png file.
Building the apk file :
On the virtual machine Linux terminal, I have set the project folder
that contains the main file main.py, and then run:
buildozer android debug
the process by this line took quite some time. The apk file has size
of 11MB. After I plug in the phone, I ran (on VM Linux terminal):
buildozer android deploy run
The app was installed on the phone.
The problem :
But when I open it : it only says "loading..." alongside with the
Kivy logo and then it closes itself. What causes this?
The python that I saw in the VM terminal is python 2.7.13 while my
code was written in python 3. Is this the problem? If it is, what
is the solution?
Hope to get feedbacks on this. Thanks.
解决方案：
The solution was to rewrite the code such that it works in python 2.7. Now the code works in Python2 and Python3. Then I build the apk using this edited main.py. Now, it does not crash.
您可以通过取消注释 buildozer.specs 中的 "android.logcat_filters = *:S python:D" 行来添加正则表达式来过滤某些 logcat 的输出（只需查看有关 python 的日志，但您可以添加一些信息以过滤更多信息。）。
我也遇到了与此配置类似的问题（python3 在计算机上，python2 在 android 上，是的，你必须使你的代码 "almost" 两者兼容）。
为此，需要记住一些简单的步骤（我可能会忘记一些）：
在定义静态方法之前添加“@static-method”行
在 python 个子文件夹
上添加一个空的“__init__.py”文件
我怀疑是 numpy 配方的问题，但它可以，所以你可以在 buildozer.specs 中添加你想使用的版本，或者只是清理 buildozer 再次测试。
希望这对你有帮助，让我知道:)
已解决问题：
I would like to ask about a Kivy-Python app just built using
buildozeron the Oracle virtual machine. The app is written in Windows, python 3 usingkivyand depends onnumpy, and some.pngfile.Building the apk file :
On the virtual machine Linux terminal, I have set the project folder that contains the main file
main.py, and then run:buildozer android debugthe process by this line took quite some time. The apk file has size of 11MB. After I plug in the phone, I ran (on VM Linux terminal):
buildozer android deploy runThe app was installed on the phone.
The problem :
But when I open it : it only says "loading..." alongside with the Kivy logo and then it closes itself. What causes this?
The python that I saw in the VM terminal is
python 2.7.13while my code was written inpython 3. Is this the problem? If it is, what is the solution?Hope to get feedbacks on this. Thanks.
解决方案：
The solution was to rewrite the code such that it works in
python 2.7. Now the code works in Python2 and Python3. Then I build the apk using this editedmain.py. Now, it does not crash.
您可以通过取消注释 buildozer.specs 中的 "android.logcat_filters = *:S python:D" 行来添加正则表达式来过滤某些 logcat 的输出（只需查看有关 python 的日志，但您可以添加一些信息以过滤更多信息。）。
我也遇到了与此配置类似的问题（python3 在计算机上，python2 在 android 上，是的，你必须使你的代码 "almost" 两者兼容）。
为此，需要记住一些简单的步骤（我可能会忘记一些）：
在定义静态方法之前添加“@static-method”行
在 python 个子文件夹
我怀疑是 numpy 配方的问题，但它可以，所以你可以在 buildozer.specs 中添加你想使用的版本，或者只是清理 buildozer 再次测试。
希望这对你有帮助，让我知道:)