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65 lines
2.2 KiB
Markdown
65 lines
2.2 KiB
Markdown
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# Python for Android
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These instructions are only needed if you're planning to compile Python for
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Android yourself. Most users should *not* need to do this. If you're looking to
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use Python on Android, one of the following tools will provide a much more
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approachable user experience:
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* [Briefcase](https://briefcase.readthedocs.io), from the BeeWare project
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* [Buildozer](https://buildozer.readthedocs.io), from the Kivy project
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* [Chaquopy](https://chaquo.com/chaquopy/)
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## Prerequisites
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Export the `ANDROID_HOME` environment variable to point at your Android SDK. If
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you don't already have the SDK, here's how to install it:
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* Download the "Command line tools" from <https://developer.android.com/studio>.
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* Create a directory `android-sdk/cmdline-tools`, and unzip the command line
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tools package into it.
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* Rename `android-sdk/cmdline-tools/cmdline-tools` to
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`android-sdk/cmdline-tools/latest`.
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* `export ANDROID_HOME=/path/to/android-sdk`
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## Building
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Building for Android requires doing a cross-build where you have a "build"
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Python to help produce an Android build of CPython. This procedure has been
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tested on Linux and macOS.
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The easiest way to do a build is to use the `android.py` script. You can either
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have it perform the entire build process from start to finish in one step, or
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you can do it in discrete steps that mirror running `configure` and `make` for
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each of the two builds of Python you end up producing.
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The discrete steps for building via `android.py` are:
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```sh
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./android.py configure-build
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./android.py make-build
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./android.py configure-host HOST
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./android.py make-host HOST
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```
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To see the possible values of HOST, run `./android.py configure-host --help`.
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Or to do it all in a single command, run:
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```sh
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./android.py build HOST
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```
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In the end you should have a build Python in `cross-build/build`, and an Android
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build in `cross-build/HOST`.
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You can use `--` as a separator for any of the `configure`-related commands –
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including `build` itself – to pass arguments to the underlying `configure`
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call. For example, if you want a pydebug build that also caches the results from
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`configure`, you can do:
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```sh
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./android.py build HOST -- -C --with-pydebug
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```
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