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Android Studio如何运行Python代码?

Of course! Using Python in Android Studio is a very popular and powerful combination, especially for machine learning, data processing, and scripting. It's not about building a traditional Android app with Python, but rather about using Python's strengths within the Android development ecosystem.

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Here’s a complete guide covering the main ways to integrate Python into Android Studio, from the most common and recommended to more advanced methods.


Summary of Methods

Method How it Works Best For Pros Cons
Kivy A Python framework that uses its own engine to build native UIs. Building a complete, cross-platform mobile app (Android & iOS) using only Python. True Python-native app, cross-platform, mature framework. UI might not look "native" to Android, larger app size, less integration with Android OS features.
BeeWare Uses a Python runtime and a "native" widget toolkit to create UIs that look like the OS. Building a complete, cross-platform app that looks and feels native. UIs look native, Python-first, great tooling. Smaller community than Kivy, still evolving.
ML Kit / TensorFlow Lite The most common and practical method. You train a model in Python (using TensorFlow, PyTorch, etc.), convert it to a mobile-friendly format (TFLite), and run inference in a standard Android app (built with Kotlin/Java). Machine Learning and AI features in a native Android app (e.g., image recognition, text analysis, object detection). High performance, uses GPU/Neural Processing Unit (NPU), seamless integration with Android, leverages Python's ML ecosystem. Not for general-purpose scripting; the core app logic is still in Kotlin/Java.
Chaquopy A plugin for Android Studio that lets you embed a Python interpreter directly into your Android app. Running Python scripts, data analysis, or small libraries inside a standard Android app. True Python integration within Android Studio, use any Python library (NumPy, Pandas, etc.), easy to debug. Can increase app size, potential performance overhead for heavy tasks, requires managing two runtimes.
Termux A terminal emulator and Linux environment for Android that includes Python. Power users, developers, and system administrators who want to run Python scripts, servers, or CLI tools directly on their Android device. Full Linux environment, install any Python package via pip, no need for a traditional app. Not an integration with Android Studio. The user runs it as a separate app. No UI for your app.

Method 1: Building a Native App with Kivy (Recommended for Full Python Apps)

Kivy is an open-source Python library for developing multitouch applications. It runs on Windows, macOS, Linux, Android, and iOS.

How it Works:

  1. You write your entire application logic and UI in Python.
  2. Kivy uses its own rendering engine to draw the UI on the screen.
  3. You use a special build tool (e.g., buildozer) to package your Python code into an standard Android APK.

Step-by-Step Guide:

Android Studio如何运行Python代码?-图2
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  1. Install Prerequisites:

    • Install Python on your system.
    • Install Kivy: pip install kivy
    • Install the build tool for Android: pip install --upgrade buildozer
  2. Create a Kivy App (main.py):

    from kivy.app import App
    from kivy.uix.button import Button
    class TestApp(App):
        def build(self):
            return Button(text='Hello from Kivy on Android!')
    if __name__ == '__main__':
        TestApp().run()
  3. Initialize Buildozer:

    • Create a project folder and place your main.py file inside.
    • Open a terminal in that folder and run: buildozer init
    • This creates a buildozer.spec file. You'll need to edit this file to configure your app (name, permissions, orientation, etc.). For a simple start, you can mostly leave it as is.
  4. Build the APK:

    Android Studio如何运行Python代码?-图3
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    • Connect an Android device or start an emulator.
    • Run the build command: buildozer android debug deploy run
    • buildozer will download the Android SDK/NDK, compile your app, install it on the device, and run it. This first run will take a very long time!

Method 2: Using Python for Machine Learning with ML Kit (Most Practical Method)

This is the industry-standard approach for adding AI features to an app. Your app's UI and core logic are built with Kotlin or Java, but the "brains" are a Python-trained model.

How it Works:

  1. Train in Python: Use TensorFlow, PyTorch, or Scikit-learn in Python to create your machine learning model.
  2. Convert to TFLite: Convert your trained model into the TensorFlow Lite (.tflite) format, which is optimized for mobile devices.
  3. Integrate in Android Studio: Add the .tflite file to your Android project. Use the ML Kit or TFLite APIs in your Kotlin/Java code to load the model and run inference (make predictions).

High-Level Steps in Android Studio:

  1. Create a new Android Project (using Kotlin or Java).

  2. Add ML Kit/TFLite Dependency: In your build.gradle (Module: app) file, add the necessary dependencies.

    // For ML Kit
    implementation 'com.google.mlkit:object-detection:16.0.0' // Example for object detection
    // For TensorFlow Lite
    implementation 'org.tensorflow:tensorflow-lite:2.14.0'
    implementation 'org.tensorflow:tensorflow-lite-gpu:2.14.0' // For GPU acceleration
  3. Add Your Model: Place your converted .tflite file in the app/src/main/assets directory.

  4. Write Inference Code: In your Activity or Fragment, load the model and pass input data (e.g., an image bitmap) to get a result.

This method combines the best of both worlds: the power and ecosystem of Python for AI, and the performance and native feel of Kotlin/Java for the app itself.


Method 3: Embedding Python with Chaquopy (Best for Scripting & Libraries)

Chaquopy is a commercial plugin (with a free version) that embeds a Python interpreter directly into your Android app. This allows you to run Python code and call Python libraries from your Kotlin/Java app.

How it Works:

  1. You create a standard Android project in Android Studio using Kotlin or Java.
  2. You add the Chaquopy plugin to your project.
  3. You place your Python scripts (.py files) in the src/main/python directory.
  4. You can call Python functions directly from your Kotlin code.

Step-by-Step Guide:

  1. Install the Plugin: In Android Studio, go to File > Settings > Plugins, search for "Chaquopy", and install it. Restart Android Studio.

  2. Configure build.gradle:

    • In your build.gradle (Module: app) file, add the Chaquopy plugin and repositories at the top.
      plugins {
      id 'com.android.application'
      id 'org.chaquopy.android' version '15.0.0' // Check for the latest version
      }

    android { // ... }

    repositories { // ... maven { url 'https://chaquo.com/maven' } }

  3. Add Python Dependencies: In the same build.gradle file, declare the Python packages you need.

    chaquopy {
        python {
            // The default version is 3.8.
            // pypi {
            //     "Pillow": "9.5.0" // Example: Add a specific version of a library
            // }
        }
    }

    You can also install packages via the command line: python -m pip install numpy.

  4. Create Python Code: Create a directory src/main/python in your project and add a file my_module.py.

    # src/main/python/my_module.py
    def greet(name):
        return f"Hello, {name} from Python!"
    def add_numbers(a, b):
        return a + b
  5. Call Python from Kotlin:

    // In your MainActivity.kt
    import com.chaquo.python.Python
    import com.chaquo.python.android.AndroidPlatform
    class MainActivity : AppCompatActivity() {
        override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
            setContentView(R.layout.activity_main)
            // Initialize Python
            if (!Python.isStarted()) {
                Python.start(AndroidPlatform(this))
            }
            // Get the Python instance
            val py = Python.getInstance()
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