How to join explorer on android compile time

Compiled an Android source code, found that there is no resource management. Want to install the program via SD card, but no resource manager, can not see the contents of the internal memory and the content on the inserted SD.
Android has its own resource manager do? How can Android source code at compile time, adding native Explorer, or join and automatically install third-party resource manager?

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There are built-in explorer, if you do not, then,
There are two ways to solve
1 Locate the copy source code, compile the file explorer copied, or directly copy apk to the system / app folder, compiled
2 downloaded from the Internet such as es file explorer file browser apk or re copied to system / app folder, compiled

If you do not trust the compiler source browser, or directly copy the apk tricky point
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Setup can adb install command ah

Compile this module requires you to add the build under the Resource Manager module mk (provided there is the source)

As stated above the apk or copying system / app