cordova plugin add https://github.com/SimarSima/CordovaAndroidShowPDFPlugin.git 

Or

cordova plugin add git://github.com/SimarSima/CordovaAndroidShowPDFPlugin.git 

Or Install from local

1. git clone https://github.com/SimarSima/CordovaAndroidShowPDFPlugin.git
2. cordova plugin add "your patch"

The path of PDF must not be a absolute path.Like “/stroage/XXXXXXX”