The Dalvik folder consists of Dalvik virtual machine related code.
Even though art was introduced long back and it still uses the tax code in this folder.
There are modules supporting that code generator and dalvik exchange under the Dalvik folder.
You can find the next gen.
So this module is basically responsible for generating that x files.
So this is basically the code generator project and here you can find the Dalvik exchange.
This basically takes in the class files and converts it into the VM format.
And there are some docs related to Dalvik which you can find here.
There are some tools and OP code.
Next we have the developers folder inside developers directory.
You can find some demo and sample Android project provided by Google with each new version of Android
under the developers folder, we can find some demos and samples.
There are many samples related to TV sensors, render script notification and many more.
Next, we have the development folder.
Under the development folder, you can find application development related modules or tools.
There you can find the development ID like Eclipse Intelligence C line.
Loads of sample implementations are available under the sample folder and many other folders to support
app development like Python V and Decay, etc. So the developers and development folder are mainly for
reference and it also contains some of the tools which could be used for development.
These folders contains a lot of reference projects for the application developers, which are really
helpful.
Whenever there's a new Android version, so under the development folder we have a lot of sample apps
here.
So whenever there is a new feature in Android, you can look at these folders to find a sample sample
implementation directly from Google.
And under this there is a tools folder that can see a lot of tools like wind scope, report, ID, an
emulator and under the ID folder you can find these these IDs like in eclipse and sea lion.
Next is the device folder.
Under the device folder, you can find device specific files and components.
Here we can find the supporting configuration and driver files required for development boats like Leonardo.
Leonardo High Key II Board Amlogic Port under the device you have different directories for different
ports.
Here it is the Leonardo High keyboard.
You can find high key related modules here or supporting drivers and the high key kernel is available
here.
Similarly for the Dragon Boat and the Dragon Boat Kernel and there are some Google related drivers and
dependent modules that are available here.
This is for Google Car and the Amlogic amlogic consists of the kernel and the drivers basically for
the VIM three board.
So for Aosp development, we mainly use either hi keyboard, dragon boat or Vim three board so you can
find all the drivers for them here.
The external folder consists of the open source project imported into Aosp.
This folder contains a lot of dependent projects used by Aosp like Dagger to Excel, Player, Flat,
Perverse, ICU, Jaxson, Rust and many, many more.
There are around 347 dependent modules as in Aosp 12 external.
You can find numerous number of folders.
These are all open source projects which are used by Aosp.
So you can find all of them here like Python, rust, tensorflow, tiny XML SQLite you can find here.
So there are plenty of open source projects imported into aosp.