Export a Python Script to an Android Executable (.Apk) with Python-For-Android

Export a Python script to an Android executable (.apk) with Python-For-Android

So, basically, you're using buildozer and it's working now. Look in the buildozer.spec file again. There should be the lines:

# (str) Application versioning (method 1)
version.regex = __version__ = '(.*)'
version.filename = %(source.dir)s/main.py

# (str) Application versioning (method 2)
# version = 1.2.0

what you want to do, I believe( because I had to do this ), is change them to this:

# (str) Application versioning (method 1)
# version.regex = __version__ = '(.*)'
# version.filename = %(source.dir)s/main.py

# (str) Application versioning (method 2)
version = 1.2.0

see I have commented out two lines at the top, and uncommented the bottom line. (I haven't bothered changing the '1.2.0' yet myself, so don't know if that makes a difference. It shouldn't.) The problem seems to be that buildozer looks for a line in your py file, __version__ = something, and there is an error when it doesn't find it. I tried adding this line to my python, but it still didn't work. This change however, did work.

Also, try running your build with verbose on, so you can see exactly what's causing any errors, for example:

sudo buildozer --verbose android debug deploy run

Is there a way to run Python on Android?

One way is to use Kivy:

Open source Python library for rapid development of applications
that make use of innovative user interfaces, such as multi-touch apps.

Kivy runs on Linux, Windows, OS X, Android and iOS. You can run the same [python] code on all supported platforms.

Kivy Showcase app

How to develop Android app completely using python?

To answer your first question: yes it is feasible to develop an android application in pure python, in order to achieve this I suggest you use BeeWare, which is just a suite of python tools, that work together very well and they enable you to develop platform native applications in python.

checkout this video by the creator of BeeWare that perfectly explains and demonstrates it's application

How it works

Android's preferred language of implementation is Java - so if you want to write an Android application in Python, you need to have a way to run your Python code on a Java Virtual Machine. This is what VOC does. VOC is a transpiler - it takes Python source code, compiles it to CPython Bytecode, and then transpiles that bytecode into Java-compatible bytecode. The end result is that your Python source code files are compiled directly to a Java .class file, which can be packaged into an Android application.

VOC also allows you to access native Java objects as if they were Python objects, implement Java interfaces with Python classes, and subclass Java classes with Python classes. Using this, you can write an Android application directly against the native Android APIs.

Once you've written your native Android application, you can use Briefcase to package your Python code as an Android application.

Briefcase is a tool for converting a Python project into a standalone native application. You can package projects for:

• Mac
• Windows
• Linux
• iPhone/iPad
• Android
• AppleTV
• tvOS.

You can check This native Android Tic Tac Toe app written in Python, using the BeeWare suite. on GitHub

in addition to the BeeWare tools, you'll need to have a JDK and Android SDK installed to test run your application.

and to answer your second question: a good environment can be anything you are comfortable with be it a text editor and a command line, or an IDE, if you're looking for a good python IDE I would suggest you try Pycharm, it has a community edition which is free, and it has a similar environment as android studio, due to to the fact that were made by the same company.

I hope this has been helpful

Is there a way to get the source code from an APK file?

Simplest way: use the online tool Decompiler, upload the apk and get the source code.

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Procedure for decoding .apk files, step-by-step method:

Step 1:

1. Make a new folder and copy over the .apk file that you want to decode.

2. Now rename the extension of this .apk file to .zip (rename from filename.apk to filename.zip) and save it. Now you can access the classes.dex files. At this stage, you are able to see drawables, but not the .xml and .java files.

Step 2:

1. Now extract this .zip file in the same folder or a new folder.

2. Download dex2jar (Don't download the code, click on the releases button that's on the right, then download that) and extract it to the same folder or a new folder.

3. Move the classes.dex file into the dex2jar folder.

4. Now open Command Prompt and change the directory to that folder. Then write d2j-dex2jar classes.dex (for Mac or Ubuntu write ./d2j-dex2jar.sh classes.dex) and press enter. You now have the classes.dex.dex2jar file in the same folder.

5. Download java decompiler, Right click on jd-gui, click on Open File, and open classes.dex.dex2jar file from that folder: Now you get the class files.

6. Save all of these class files (In jd-gui, click File -> Save All Sources) by src name. At this stage, you get the Java code but the .xml files are still unreadable.

Step 3:

Now open another new folder

1. Put in the .apk file which you want to decode

2. Download the latest version of apktool AND apktool install window (both can be downloaded from the same link) and place them in the same folder

3. Open the Command Prompt

4. Now run command apktool if framework-res.apk (if you don't have it get it here)and next

5. apktool d myApp.apk (myApp.apk denotes the filename that you want to decode)

Now you get a file folder in that folder and can easily read the .xml files.

Step 4:

It's not any step, just copy the contents of both folders (both new folders) to the single one

AND ENJOY THE SOURCE CODE!

How do I get an apk file from an Android device?

Use adb. With adb pull you can copy files from your device to your system, when the device is attached with USB.

Of course you also need the right permissions to access the directory your file is in. If not, you will need to root the device first.

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If you find that many of the APKs are named "base.apk" you can also use this one line command to pull all the APKs off a phone you can access while renaming any "base.apk" names to the package name. This also fixes the directory not found issue for APK paths with seemingly random characters after the name:

for i in $(adb shell pm list packages | awk -F':' '{print $2}'); do 
  adb pull "$(adb shell pm path $i | awk -F':' '{print $2}')"
  mv base.apk $i.apk &> /dev/null 
done

If you get "adb: error: failed to stat remote object" that indicates you don't have the needed permissions. I ran this on a NON-rooted Moto Z2 and was able to download ALL the APKs I did not uninstall (see below) except youtube.

adb shell pm uninstall --user 0 com.android.cellbroadcastreceiver   <--- kills presidential alert app!

(to view users run adb shell pm list users)
This is a way to remove/uninstall (not from the phone as it comes back with factory reset) almost ANY app WITHOUT root INCLUDING system apps (hint the annoying update app that updates your phone line it or not can be found by grepping for "ccc")

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