The Guide shows you Step-by-Step How to Install and Getting-Started with Android SDK Tools Latest Revision for Ubuntu 12.04 Precise Pangolin i386 Desktop.
And this Visual Guide includes the Basic Screenshots of All GUI Steps involved.
The content of the Guides give Focus only to the Essentials Instructions and Commands for an easier understanding ;)

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Here Download Latest Android SDK rN:
Android SDK Tools Linux .tgzLink to Download Latest Android SDK Tools -
Double-Click on Archive and Extract into /tmp
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Open Terminal Window
(Press “Enter” to Execute Commands)In case first see: Terminal QuickStart Guide.
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Relocate Android SDK.
Copysudo su
If Got “User is Not in Sudoers file” then see: How to Enable sudo
Copymv /tmp/android-sdk-linux /opt
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Installing Android SDK for Linux.
- Access Target Copy
cd /opt/android-sdk-linux/tools
- Start Android SDK Manager Copy
./android sdk
- Select Android SDK Features
Select Accept All to Install All Default Checked Features.
- Installing Android SDK
- Access Target
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Insert Android Tools into User PATH
Copysu <username>
Copynano ~/.bashrc
Copyexport PATH=/opt/android-sdk-linux/tools:/opt/android-sdk-linux/platform-tools:$PATH
Ctrl+Shift+v to Paste Content on nano
Ctrl+x to Save and Exit.Load New Settings.
Copybash
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How Add Android Integration to Eclipse Platform:
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Getting-Started Coding Hello-World Android App on Eclipse: