This is PL2303HXD multi port APK on Android. It can support 4 * PL2303HXD (RA / EA).

You can download the source code from Prolific web-site, and then develop your own android application

Requirements:
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– USB Device with PL2303HXD, PL2303EA or PL2303RA controller chip
NOTE: PL2303HXA and PL2303XA are not supported (Discontinued Products)
– Android-Powered Device (Tablet/Phones) with USB Host Mode Support
– Android 3.2 and above OS versions

Click to Download