Kivy在Android中启动时崩溃

Question

当我在我的安卓手机（三星GSIII）上启动Kivy应用时，启动画面出现后就崩溃了，然后返回到之前的界面。经过反复尝试，我发现是我导入的ws4py导致了这个错误。

我在buildozer.spec文件的需求部分添加了ws4py，内容是 requirements = kivy,ws4py，在运行 $>buildozer android debug 时，它似乎下载得很正常。查看ws4py的源代码和文档后，发现除了标准库中的模块外没有其他导入，所以看起来不是依赖问题（但也可能是？）。

DDMS日志在这里：

05-02 09:17:29.677: D/dalvikvm(22120): Trying to load lib /data/app-lib/com.shufudesign.drmb-2/libsdl.so 0x422833c8
05-02 09:17:29.687: D/dalvikvm(22120): Added shared lib /data/app-lib/com.shufudesign.drmb-2/libsdl.so 0x422833c8
05-02 09:17:29.687: D/dalvikvm(22120): Trying to load lib /data/app-lib/com.shufudesign.drmb-2/libsdl_image.so 0x422833c8
05-02 09:17:29.697: D/dalvikvm(22120): Added shared lib /data/app-lib/com.shufudesign.drmb-2/libsdl_image.so 0x422833c8
05-02 09:17:29.697: D/dalvikvm(22120): No JNI_OnLoad found in /data/app-lib/com.shufudesign.drmb-2/libsdl_image.so 0x422833c8, skipping init
05-02 09:17:29.697: D/dalvikvm(22120): Trying to load lib /data/app-lib/com.shufudesign.drmb-2/libsdl_ttf.so 0x422833c8
05-02 09:17:29.697: D/dalvikvm(22120): Added shared lib /data/app-lib/com.shufudesign.drmb-2/libsdl_ttf.so 0x422833c8
05-02 09:17:29.697: D/dalvikvm(22120): No JNI_OnLoad found in /data/app-lib/com.shufudesign.drmb-2/libsdl_ttf.so 0x422833c8, skipping init
05-02 09:17:29.697: D/dalvikvm(22120): Trying to load lib /data/app-lib/com.shufudesign.drmb-2/libsdl_mixer.so 0x422833c8
05-02 09:17:29.707: D/dalvikvm(22120): Added shared lib /data/app-lib/com.shufudesign.drmb-2/libsdl_mixer.so 0x422833c8
05-02 09:17:29.707: D/dalvikvm(22120): No JNI_OnLoad found in /data/app-lib/com.shufudesign.drmb-2/libsdl_mixer.so 0x422833c8, skipping init
05-02 09:17:29.707: D/dalvikvm(22120): Trying to load lib /data/app-lib/com.shufudesign.drmb-2/libpython2.7.so 0x422833c8
05-02 09:17:29.727: D/dalvikvm(22120): Added shared lib /data/app-lib/com.shufudesign.drmb-2/libpython2.7.so 0x422833c8
05-02 09:17:29.727: D/dalvikvm(22120): No JNI_OnLoad found in /data/app-lib/com.shufudesign.drmb-2/libpython2.7.so 0x422833c8, skipping init
05-02 09:17:29.727: D/dalvikvm(22120): Trying to load lib /data/app-lib/com.shufudesign.drmb-2/libapplication.so 0x422833c8
05-02 09:17:29.727: D/dalvikvm(22120): Added shared lib /data/app-lib/com.shufudesign.drmb-2/libapplication.so 0x422833c8
05-02 09:17:29.727: D/dalvikvm(22120): No JNI_OnLoad found in /data/app-lib/com.shufudesign.drmb-2/libapplication.so 0x422833c8, skipping init
05-02 09:17:29.727: D/dalvikvm(22120): Trying to load lib /data/app-lib/com.shufudesign.drmb-2/libsdl_main.so 0x422833c8
05-02 09:17:29.727: D/dalvikvm(22120): Added shared lib /data/app-lib/com.shufudesign.drmb-2/libsdl_main.so 0x422833c8
05-02 09:17:29.737: D/dalvikvm(22120): No JNI_OnLoad found in /data/app-lib/com.shufudesign.drmb-2/libsdl_main.so 0x422833c8, skipping init
05-02 09:17:29.737: D/dalvikvm(22120): Trying to load lib /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_io.so 0x422833c8
05-02 09:17:29.737: D/dalvikvm(22120): Added shared lib /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_io.so 0x422833c8
05-02 09:17:29.737: D/dalvikvm(22120): No JNI_OnLoad found in /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_io.so 0x422833c8, skipping init
05-02 09:17:29.737: D/dalvikvm(22120): Trying to load lib /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/unicodedata.so 0x422833c8
05-02 09:17:29.747: D/dalvikvm(22120): Added shared lib /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/unicodedata.so 0x422833c8
05-02 09:17:29.747: D/dalvikvm(22120): No JNI_OnLoad found in /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/unicodedata.so 0x422833c8, skipping init
05-02 09:17:29.747: D/dalvikvm(22120): Trying to load lib /data/app-lib/com.shufudesign.drmb-2/libsqlite3.so 0x422833c8
05-02 09:17:29.757: D/dalvikvm(22120): Added shared lib /data/app-lib/com.shufudesign.drmb-2/libsqlite3.so 0x422833c8
05-02 09:17:29.757: D/dalvikvm(22120): No JNI_OnLoad found in /data/app-lib/com.shufudesign.drmb-2/libsqlite3.so 0x422833c8, skipping init
05-02 09:17:29.757: D/dalvikvm(22120): Trying to load lib /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_sqlite3.so 0x422833c8
05-02 09:17:29.757: D/dalvikvm(22120): Added shared lib /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_sqlite3.so 0x422833c8
05-02 09:17:29.757: D/dalvikvm(22120): No JNI_OnLoad found in /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_sqlite3.so 0x422833c8, skipping init
05-02 09:17:29.767: D/dalvikvm(22120): Trying to load lib /data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_imaging.so 0x422833c8
05-02 09:17:29.767: E/dalvikvm(22120): dlopen("/data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_imaging.so") failed: dlopen failed: library "/data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload/_imaging.so" not found
05-02 09:17:30.488: I/python(22120): ['/data/data/com.shufudesign.drmb/files/lib/python2.7/site-packages', '/data/data/com.shufudesign.drmb/files/lib/site-python']
05-02 09:17:30.488: I/python(22120): Android path ['/data/data/com.shufudesign.drmb/files/lib/python27.zip', '/data/data/com.shufudesign.drmb/files/lib/python2.7', '/data/data/com.shufudesign.drmb/files/lib/python2.7/lib-dynload', '/data/data/com.shufudesign.drmb/files/lib/python2.7/site-packages', '/data/data/com.shufudesign.drmb/files', '/data/data/com.shufudesign.drmb/files/lib/python2.7/site-packages/PIL', '/data/data/com.shufudesign.drmb/files/_applibs']
05-02 09:17:30.908: I/python(22120): [INFO              ] [Logger      ] Record log in /data/data/com.shufudesign.drmb/files/.kivy/logs/kivy_14-05-02_0.txt
05-02 09:17:31.990: I/python(22120):  /data/data/com.shufudesign.drmb/files/lib/python2.7/site-packages/kivy/core/image/img_pygame.py:12: RuntimeWarning: import cdrom: No module named cdrom
05-02 09:17:32.250: I/ActivityManager(610): Process com.shufudesign.drmb:python (pid 22120) (adj 0) has died.
05-02 09:17:32.250: W/ActivityManager(610): Force removing ActivityRecord{42ed13d0 u0 com.shufudesign.drmb/org.renpy.android.PythonActivity}: app died, no saved state

我查看了一些关于kivy和python-for-android的Google小组，发现有些人也遇到了相同的_imaging.so错误。大家的反馈似乎是这个错误并不是导致问题的原因。我把应用中的所有内容都去掉，只留下绘制一个圆的功能（这个是可以正常工作的），然后再添加ws4py的导入（这就导致崩溃）。

在添加第三方库时，除了把它们加到spec文件里，还有什么我遗漏的吗？在Ubuntu上运行一切都很好。任何帮助都将非常感谢，因为我的应用依赖于web sockets来连接后端。

Answer 1

你有没有开启安卓的INTERNET权限？

另外，ws4py这个库有很多依赖项，你可能需要手动添加。我特别看到在使用tornado、gevent和cython时可能会遇到问题。你可以查看这个链接了解更多依赖信息：https://github.com/Lawouach/WebSocket-for-Python/blob/master/requirements/py2kreqs.txt

Answer 2

我也遇到了同样的问题。把openssl加到需要的模块列表里就解决了这个问题（也就是说，在buildozer.spec文件里写上'requirements = openssl, ws4py, kivy'）。

使用snakefood来列出一个Python脚本加载的每个模块也很有帮助。想了解更多细节，可以查看这个链接：如何在不加载的情况下列出Python包的依赖关系？