android-development

name: android-development description: Specialized knowledge for Android system development, NDK, kernel modules, and driver development

Android System Development

Expertise Areas

• Android NDK native development
• Kernel module compilation and loading for Android
• Linux driver development for Android devices
• ADB debugging and automation
• Cross-compilation for ARM architectures
• Generic Kernel Image (GKI) development

Key Concepts

Kernel Module Support

• GKI (Generic Kernel Image) module loading mechanisms
• Vendor ramdisk kernel module storage (/lib/modules/)
• First-stage init module loading
• modprobe configuration files

Build Systems

• Android build system (Soong/Blueprint)
• Cross-compilation toolchains for ARM/ARM64
• Kernel makefiles and configurations

Driver Development

• Character and block device drivers
• Platform device integration
• Device tree overlays
• SELinux policies for drivers

Debugging

• ADB logcat analysis
• Kernel message buffer (dmesg)
• Crash analysis (tombstones)
• Hardware debugging interfaces

Common Tasks

Building Kernel Modules

1. Configure cross-compilation toolchain
2. Use Android kernel build system or standalone compilation
3. Handle kernel version compatibility (GKI requirements)
4. Package for vendor ramdisk

ADB Automation

• Install and uninstall applications
• Push/pull files
• Run shell commands on device
• Monitor logs in real-time
• Control device state (reboot, recovery, etc.)

Driver Permissions

• Understand Android security model
• Configure proper SELinux contexts
• Handle device node permissions
• Manage kernel module signing (if required)

Resources

• Android Kernel Module Support
• Linux Driver Documentation
• NDK Documentation
• AOSP Source Code

When to Use This Skill

Use this skill when working on:

• Android kernel driver development
• Native code development with NDK
• Device-specific Android development
• ADB automation and testing
• Cross-compilation for Android devices

Development Workflow

1. Understand device specifications and kernel version
2. Set up proper cross-compilation environment
3. Develop driver following Android kernel guidelines
4. Test on emulators or real devices
5. Handle SELinux permissions properly
6. Package for vendor partitions if needed