我正在尝试使用buildozer生成APK。下面显示了我的buildozer.spec文件中的规格以及我的计算机规格：
python 2.7,
Buildozer 0.35
kivy 1.10.1
buildozer.spec file
# (int) Android API to use
android.api = 28
# (int) Minimum API required
android.minapi = 24
# (int) Android SDK version to use
android.sdk = 20
# (str) Android NDK version to use
android.ndk = 18b
# (bool) Use --private data storage (True) or --dir public storage (False)
#android.private_storage = True
# (str) Android NDK directory (if empty, it will be automatically downloaded.)
#android.ndk_path = ~/.buildozer/android/platform/android-ndk-r18b
# (str) Android SDK directory (if empty, it will be automatically downloaded.)
#android.sdk_path =
起初，我使用android.minapi = 21，但是我意识到没有安装API 23，所以我将API 24用作我的android.minapi，因为我已经安装了API 24-29，并且所有Android SDK构建工具也都已安装。但是我不断收到以下有关NDK的错误消息。有人可以指导我该怎么做吗？
[INFO]: Will compile for the following archs: armeabi-v7a
[INFO]: Found Android API target in $ANDROIDAPI: 28
[INFO]: Available Android APIs are (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
[INFO]: Requested API target 28 is available, continuing.
[INFO]: Found NDK dir in $ANDROIDNDK: /home/bunmalik/.buildozer/android/platform/android-ndk-r18b
[INFO]: Got NDK version from $ANDROIDNDKVER: r18b
[WARNING]: NDK API target was not set manually, using the default of 21 = min(android-api=28, default ndk-api=21)
[INFO]: Using Google NDK r18b
[INFO]: Found virtualenv at /usr/local/bin/virtualenv
[INFO]: Found the following toolchain versions: ['4.9']
[INFO]: Picking the latest gcc toolchain, here 4.9
[INFO]: No existing dists meet the given requirements!
[ERROR]: Asked for dist with name myapp with recipes (kivy, python2) and NDK API 0, but a dist with this name already exists and has either incompatible recipes (hostpython2, sdl2_image, sdl2_mixer, sdl2_ttf, python2, sdl2, six, pyjnius, kivy) or NDK API 19
[ERROR]: No compatible dist found, so exiting.