Вопрос: Есть ли способ запустить Python на Android? [закрыто]


Мы работаем над S60 версия, и на этой платформе есть хороший API Python.

Тем не менее, о Python на Android нет ничего официально, но поскольку Jython существует ли способ позволить змее и роботу работать вместе?


1858


источник


Ответы:


Один из способов - использовать Kivy :

Библиотека Python с открытым исходным кодом для быстрой разработки приложений   которые используют инновационные пользовательские интерфейсы, такие как приложения с несколькими касаниями.

Kivy работает на Linux, Windows, OS X, Android и iOS. Вы можете запустить такой же код [python] на всех поддерживаемых платформах.

Приложение Kivy Showcase


798



Существует также новый Сценарии для Android (ASE / SL4A). Он выглядит потрясающе, и он имеет некоторую интеграцию с родными компонентами Android.

Примечание: больше не происходит «активное развитие», но некоторые вилки могут быть.


298



ДА!

Пример через Мэтт Каттс через SL4A - «вот сканер штрих-кода, написанный в шести строках кода Python:

import android
droid = android.Android()
code = droid.scanBarcode()
isbn = int(code['result']['SCAN_RESULT'])
url = "http://books.google.com?q=%d" % isbn
droid.startActivity('android.intent.action.VIEW', url)

178



Есть также SL4A написанные сотрудниками Google.


73



"The Pygame Subset for Android is a port of a subset of Pygame functionality to the Android platform. The goal of the project is to allow the creation of Android-specific games, and to ease the porting of games from PC-like platforms to Android."

The examples include a complete game packaged in an APK, which is pretty interesting.


70



I've posted instructions and a patch for cross compiling Python 2.7.2 for Android, you can get it at my blog here: http://mdqinc.com/blog/2011/09/cross-compiling-python-for-android/

EDIT: I've open sourced Ignifuga, my 2D Game Engine, it's Python/SDL based and it cross compiles for Android. Even if you don't use it for games, you might get useful ideas from the code and the builder utility (named Schafer, after Tim...you know who).


63



Scripting Layer for Android

SL4A does what you want. You can easily install it directly onto your device from their site, and do not need root.

It supports a range of languages. Python is the most mature. By default, it uses Python 2.6, but there is a 3.2 port you can use instead. I have used that port for all kinds of things on a Galaxy S2 and it worked fine.

API

SL4A provides a port of their android library for each supported language. The library provides an interface to the underlying Android API through a single Android object.

from android import Android

droid = Android()
droid.ttsSpeak('hello world') # example using the text to speech facade

Each language has pretty much the same API. You can even use the JavaScript API inside webviews.

let droid = new Android();
droid.ttsSpeak("hello from js");

User Interfaces

For user interfaces, you have three options:

  • You can easily use the generic, native dialogues and menus through the API. This is good for confirmation dialogues and other basic user inputs.
  • You can also open a webview from inside a Python script, then use HTML5 for the user interface. When you use webviews from Python, you can pass messages back and forth, between the webview and the Python process that spawned it. The UI will not be native, but it is still a good option to have.
  • There is some support for native Android user interfaces, but I am not sure how well it works; I just haven't ever used it.

You can mix options, so you can have a webview for the main interface, and still use native dialogues.

QPython

There is a third party project named QPython. It builds on SL4A, and throws in some other useful stuff.

QPython gives you a nicer UI to manage your installation, and includes a little, touchscreen code editor, a Python shell, and a PIP shell for package management. They also have a Python 3 port. Both versions are available from the Play Store, free of charge. QPython also bundles libraries from a bunch of Python on Android projects, including Kivy, so it is not just SL4A.

Note that QPython still develop their fork of SL4A (though, not much to be honest). The main SL4A project itself is pretty much dead.

Useful Links


57



As a Python lover and Android programmer, I am sad to say this is not really a good way to go. There are two problems.

One problem is that there is a lot more than just a programming language to the Android development tools. A lot of the Android graphics involve XML files to configure the display, similar to HTML. The built-in java objects are really integrated with this XML layout, and it's a lot easier than writing your own code to go from logic to bitmap.

The other problem is that the G1 (and probably other Android devices for the near future) are really not that fast. 200 MHz processors, and RAM is very limited. Even in Java you have to do a decent amount of rewriting-to-avoid-more-object-creation if you want to make your app perfectly smooth. Python is going to be too slow for a while still on mobile devices.


55



Not at the moment and you would be lucky to get Jython to work soon. If you're planning to start your development now you would be better off with just sticking to Java for now on.


31



Using SL4A (which has already been mentioned by itself in other answers) you can run a full-blown web2py instance (other python web frameworks are likely candidates as well). SL4A doesn't allow you to do native UI components (buttons, scroll bars, and the like), but it does support WebViews. A WebView is basically nothing more than a striped down web browser pointed at a fixed address. I believe the native Gmail app uses a WebView instead of going the regular widget route.

This route would have some interesting features:

  • In the case of most python web frameworks, you could actually develop and test without using an android device or android emulator.
  • Whatever Python code you end up writing for the phone could also be put on a public webserver with very little (if any) modification.
  • You could take advantage of all of the crazy web stuff out there: query, HTML5, CSS3, etc.

28



Kivy


I want to post this as an extension of what @JohnMudd has already answered (but please bear with me as English isn't my first language)

It has been years since then, and Kivy has evolved to v1.9-dev. The biggest selling point of Kivy, in my opinion, is its cross-platform compatibility. You can code and test under your local environment (Windows/*nix etc.), you can also build, debug and package your app to run on your Android/iOS/Mac/Windows devices.

With Kivy's own KV language, you can code and build the GUI interface easily (it's just like Java XML, but rather than TextView etc., KV has its own ui.widgets for the similar translation), which is in my opinion quite easy to adopt.

Currently Buildozer and python-for-android are the most recommended tools to build/package your apps. I have tried them both and can firmly say that they make building Android apps with Python a breeze. Users who feel comfortable in their console/terminal/command prompt should have no problems using them, and their guides are well documented, too.

Furthermore, iOS is another big selling point of Kivy, provided that you can use the same code base with little changes required to test-run on your iOS device, via kivy-ios Homebrew tools, although Xcode is required for the build before running on their devices (AFAIK the iOS Simulator in Xcode currently doesn't work for the x86-architecture build). There are also some dependency issues which must be manually compiled and fiddled around with in Xcode to have a successful build, but they wouldn't be too difficult to resolve and people in Kivy Google Group are really helpful too.

With all being said, users with good Python knowledge should have no problem picking up the basics in weeks (if not days) to build some simple apps.

Also worth mentioning is that you can bundle (build recipes) your Python modules with the build so users can really make use of many existing libraries Python bring us, like Requests & PIL etc. through Kivy's extension support.

Sometimes your application requires functionality that is beyond the scope of what Kivy can deliver. In those cases, it is necessary to resort to external software libraries. Given the richness of the Python ecosystem, there is already a lot of software libraries that you can simply import and use right away.

The last but not the least, if you are going to use Kivy for more serious/commercial projects, you may find existing modules not satisfactory. There are some workable solutions though, with the "work in progress" of pyjnius for Android, and pyobjus. Users can now access Java/Objective-C classes through those modules to control some of the native APIs.

My experience in Kivy is that it will find its best fit with seasoned Python programmers and some serious programmers who want rapid development or simple code base maintenance. It runs well on multiple platforms, albeit not really with the native feeling.

I do hope some Python app programmers find this information useful and start taking a look at Kivy. It can only get better (with more support and as libraries/modules get ported) if there is great interest from the community.

P.S. I have no relationship with Kivy whatsoever, I'm merely a programmer who really likes the idea of bringing Python coding fun to mobile/cross-platform development.


26