title: Kivy app working on desktop but not on android
body: <p>I have tried to build a kivy text-to-speech pdf reader,which works perfectly on my Ubuntu 14.04 LTS,and there also no error upon compilation using buildozer.But the android app starts and closes without any display upon selection.Here is the apps main.py and buildozer.spec alongwith the error log using logcat.</p>
  
  <p>main.py-</p>
  
  <pre><code>from kivy.app import App
  from kivy.uix.boxlayout import BoxLayout
  import os
  from plyer import notification, tts
  #setup graphics
  from kivy.config import Config
  Config.set('graphics','resizable',0)
  from kivy.lang import Builder
  from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
  from pdfminer.converter import TextConverter
  from pdfminer.layout import LAParams
  from pdfminer.pdfpage import PDFPage
  from cStringIO import StringIO
  
  
  Builder.load_string("""
  &lt;MyWidget&gt;:
      id: my_widget
  
      FileChooserListView:
          id: filechooser
          on_selection: my_widget.talk(filechooser.selection)
  """)
  
  class MyWidget(BoxLayout):
      def open(self, path, filename):
  
          with open(os.path.join(path, filename[0])) as f:
              print f.read()
  
      def selected(self, filename):
          print "selected: %s" % filename[0]
  
      def notify(self):
          try:
              #this notification will pop up on ubuntu as well!'
              notification.notify(title="Kivy  Notification",message="Plyer Up and Running!",
          app_name="kivy_test",app_icon="icon.png",timeout=10)
          except:
              print 'error notifiying'
  
  
      def talk(self,file_path):
          try:
              tts.speak(message=self.convert_pdf_to_txt(file_path[0]))
          except:
              print 'cant talk'
  
  
      def convert_pdf_to_txt(self,path):
          rsrcmgr = PDFResourceManager()
          retstr = StringIO()
          codec = 'utf-8'
          laparams = LAParams()
          device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
          fp = file(path, 'rb')
          interpreter = PDFPageInterpreter(rsrcmgr, device)
          password = ""
          maxpages = 0
          caching = True
          pagenos=set()
  
          for page in PDFPage.get_pages(fp, pagenos, maxpages=maxpages,                                                                                         password=password,caching=caching, check_extractable=True):
              interpreter.process_page(page)
  
              text = retstr.getvalue()
  
          fp.close()
          device.close()
          retstr.close()
          return text
  
  
  
  class MyApp(App):
       def build(self):
          return MyWidget()
  
  if __name__ == '__main__':
      MyApp().run()
  </code></pre>
  
  <p>And here is the spec file</p>
  
  <p>buildozer.spec-</p>
  
  <pre><code>[app]
  
  # (str) Title of your application
  title = My First Application
  
  # (str) Package name
  package.name = MyApp
  
  # (str) Package domain (needed for android/ios packaging)
  package.domain = org.test
  
  # (str) Source code where the main.py live
  source.dir = .
  
  # (list) Source files to include (let empty to include all the files)
  source.include_exts = py,png,jpg,kv,atlas
  
  # (list) Source files to exclude (let empty to not exclude anything)
  #source.exclude_exts = spec
  
  # (list) List of directory to exclude (let empty to not exclude anything)
  #source.exclude_dirs = tests, bin
  
  # (list) List of exclusions using pattern matching
  #source.exclude_patterns = license,images/*/*.jpg
  
  # (str) Application versioning (method 1)
  #version.regex = __version__ = ['"](.*)['"]
  #version.filename = %(source.dir)s/main.py
  
  # (str) Application versioning (method 2)
  version = 1.2.0
  
  # (list) Application requirements
  # comma seperated e.g. requirements = sqlite3,kivy
  requirements = kivy,plyer,pdfminer
  
  # (str) Custom source folders for requirements
  # Sets custom source for any requirements with recipes
  # requirements.source.kivy = ../../kivy
  
  # (list) Garden requirements
  #garden_requirements =
  
  # (str) Presplash of the application
  #presplash.filename = %(source.dir)s/data/presplash.png
  
  # (str) Icon of the application
  #icon.filename = %(source.dir)s/data/icon.png
  
  # (str) Supported orientation (one of landscape, portrait or all)
  orientation = landscape
  
  # (bool) Indicate if the application should be fullscreen or not
  fullscreen = 1
  
  
  #
  # Android specific
  #
  
  # (list) Permissions
  #android.permissions = INTERNET
  
  # (int) Android API to use
  #android.api = 14
  
  # (int) Minimum API required (8 = Android 2.2 devices)
  #android.minapi = 8
  
  # (int) Android SDK version to use
  #android.sdk = 21
  
  # (str) Android NDK version to use
  #android.ndk = 9c
  
  # (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 =
  
  # (str) Android SDK directory (if empty, it will be automatically downloaded.)
  #android.sdk_path =
  
  # (str) python-for-android git clone directory (if empty, it will be automatically cloned from github)
  #android.p4a_dir =
  
  # (list) python-for-android whitelist
  #android.p4a_whitelist =
  
  # (str) Android entry point, default is ok for Kivy-based app
  #android.entrypoint = org.renpy.android.PythonActivity
  
  # (list) List of Java .jar files to add to the libs so that pyjnius         can access
  # their classes. Don't add jars that you do not need, since extra jars     can slow
  # down the build process. Allows wildcards matching, for example:
  # OUYA-ODK/libs/*.jar
  #android.add_jars = foo.jar,bar.jar,path/to/more/*.jar
  
  # (list) List of Java files to add to the android project (can be java         or a
  # directory containing the files)
  #android.add_src =
  
  # (str) python-for-android branch to use, if not master, useful to try
  # not yet merged features.
  #android.branch = master
  
  # (str) OUYA Console category. Should be one of GAME or APP
  # If you leave this blank, OUYA support will not be enabled
  #android.ouya.category = GAME
  
  # (str) Filename of OUYA Console icon. It must be a 732x412 png image.
  #android.ouya.icon.filename = %(source.dir)s/data/ouya_icon.png
  
  # (str) XML file to include as an intent filters in &lt;activity&gt; tag
  #android.manifest.intent_filters =
  
  # (list) Android additionnal libraries to copy into libs/armeabi
  #android.add_libs_armeabi = libs/android/*.so
  #android.add_libs_armeabi_v7a = libs/android-v7/*.so
  #android.add_libs_x86 = libs/android-x86/*.so
  #android.add_libs_mips = libs/android-mips/*.so
  
  # (bool) Indicate whether the screen should stay on
  # Don't forget to add the WAKE_LOCK permission if you set this to True
  #android.wakelock = False
  
  # (list) Android application meta-data to set (key=value format)
  #android.meta_data =
  
  # (list) Android library project to add (will be added in the
  # project.properties automatically.)
  #android.library_references =
  
  #
  # iOS specific
  #
  
  # (str) Name of the certificate to use for signing the debug version
  # Get a list of available identities: buildozer ios list_identities
  #ios.codesign.debug = "iPhone Developer: &lt;lastname&gt; &lt;firstname&gt;         (&lt;hexstring&gt;)"
  
  # (str) Name of the certificate to use for signing the release version
  #ios.codesign.release = %(ios.codesign.debug)s
  
  
  [buildozer]
  
  # (int) Log level (0 = error only, 1 = info, 2 = debug (with command         output))
  log_level = 2
  
  # (int) Display warning if buildozer is run as root (0 = False, 1 =         True)
  warn_on_root = 1
  
  
  #    -----------------------------------------------------------------    ------------
  #    List as sections
  #
  #    You can define all the "list" as [section:key].
  #    Each line will be considered as a option to the list.
  #    Let's take [app] / source.exclude_patterns.
  #    Instead of doing:
  #
  #[app]
  #source.exclude_patterns =     license,data/audio/*.wav,data/images/original/*
  #
  #    This can be translated into:
  #
  #[app:source.exclude_patterns]
  #license
  #data/audio/*.wav
  #data/images/original/*
  #
  
  
  #    ---------------------------------------------------------------------    --------
  #    Profiles
  #
  #    You can extend section / key with a profile
  #    For example, you want to deploy a demo version of your     application     without
  #    HD content. You could first change the title to add "(demo)" in the     name
  #    and extend the excluded directories to remove the HD content.
  #
  #[app@demo]
  #title = My Application (demo)
  #
  #[app:source.exclude_patterns@demo]
  #images/hd/*
  #
  #    Then, invoke the command line with the "demo" profile:
  
  #buildozer --profile demo android debug
  </code></pre>