I want to use this (https://github.com/ArthurHub/Android-Image-Cropper/blob/master/README.md) in my ionic v1 project for image cropping. I know we have plugins in Angular for cropping but I want to use this native plugin for smooth function.
You can access an external Java file from Ionic1 . You can access a method and get your response.
But if you really want to import the code as a plugin, then you need to create a custom Cordova plugin using plugman plugin. Refer to this link to access Java method.