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<li> <h2>Setup and Building</h2>
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     <div><a href="<?cs var:toroot ?>porting/build_system.html">Build System</a></div>
     <ul>  
       <li><a href="<?cs var:toroot ?>porting/build_new_device.html">Configuring a New Product</a></li>
       <li><a href="<?cs var:toroot ?>porting/build_cookbook.html">Build Cookbook</a></li>
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     <li><a href="<?cs var:toroot ?>porting/release_keys.html">Release Keys and Signing Builds</a></li> 
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<li> <h2>Customization</h2>
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    <li><a href="<?cs var:toroot ?>porting/customization.html">Customization</a></li>
    <li><a href="<?cs var:toroot ?>porting/usersguide.html">Android User's Guide</a></li>
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<li> <h2>System</h2>

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  <li><a href="<?cs var:toroot ?>porting/bring_up.html">Bring up</a></li>
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    <div><a href="javascript:nothing()">Connectivity</a></div>
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      <li><a href="<?cs var:toroot ?>porting/bluetooth.html">Bluetooth</a></li>
      <li><a href="<?cs var:toroot ?>porting/gps.html">GPS</a></li>
      <li><a href="<?cs var:toroot ?>porting/wifi.html">Wi-Fi</a></li>
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  <li><a href="<?cs var:toroot ?>porting/display_drivers.html">Display Drivers</a></li>
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      <li><a href="<?cs var:toroot ?>porting/keymaps_keyboard_input.html">Keymaps and Keyboard</a></li>
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  <li><a href="<?cs var:toroot ?>porting/lights.html">Lights</a></li>
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    <div><a href="javascript:nothing()">Multimedia</a></div>
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      <li><a href="<?cs var:toroot ?>porting/audio.html">Audio</a></li>
      <li><a href="<?cs var:toroot ?>porting/camera.html">Camera/Video</a></li>
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  <li><a href="<?cs var:toroot ?>porting/power_management.html">Power Management</a></li>
  <li><a href="<?cs var:toroot ?>porting/sensors.html">Sensors</a></li>
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    <div><a href="javascript:nothing()">Telephony</a></div>
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      <li><a href="<?cs var:toroot ?>porting/telephony.html">Radio Interface Layer</a></li>
      <li><a href="<?cs var:toroot ?>porting/stk.html">SIM Toolkit Application (STK)</a></li>
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</ul>
</li>

<li> <h2>Dalvik Virtual Machine</h2>
  <ul>
    <li><a href="<?cs var:toroot ?>porting/dalvik.html">Porting Dalvik</a></li>
  </ul>
</li>
<li> <h2>Testing and Debugging</h2>
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    <li><a href="<?cs var:toroot ?>porting/instrumentation_testing.html">Instrumentation Testing</a></li>
    <li><a href="<?cs var:toroot ?>porting/debugging_gdb.html">Debugging with GDB</a></li>
    <li><a href="<?cs var:toroot ?>porting/debugging_native.html">Debugging Native Code</a></li>
    <li><a href="<?cs var:toroot ?>porting/tcpdump.html">Debugging with tcpdump</a></li>
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