Here’s everything you need to know to get and use the Android source code from the official open-source repository:

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📦 What is Android Source Code?

The Android Open Source Project (AOSP) is the official source code of the Android operating system, maintained by Google.

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📥 How to Download the Android Source Code

✅ Prerequisites

• A Linux-based OS (Ubuntu 20.04+ is recommended)

• 200–300 GB of free disk space

• At least 16 GB RAM

• Git, Python, JDK 11, and the repo tool

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🧰 Step-by-Step Setup

1. Install required packages:

   bash
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   sudo apt update
   sudo apt install openjdk-11-jdk git curl python3
   

2. Install the repo tool:

   bash
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   mkdir -p ~/bin
   curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
   chmod a+x ~/bin/repo
   export PATH=~/bin:$PATH
   

3. Create a working directory:

   bash
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   mkdir ~/aosp
   cd ~/aosp
   

4. Initialize the repo:

   bash
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   repo init -u https://android.googlesource.com/platform/manifest
   

5. Sync the source (this may take hours):

   bash
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   repo sync
   

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📁 What's Inside the Android Source?

• frameworks/base/ – Core Android APIs

• packages/apps/ – Default Android apps (like Dialer, Settings)

• system/core/ – Android's system services

• kernel/ – Kernel sources (if available)

• hardware/ – HAL (hardware abstraction layer)

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🔧 Optional: Build Android for Emulator