PicassoImageHelper.kt

class PicassoImageHelper: IImageProcess {

    private val mPicassoInstance = Picasso.get()

    override fun loadUrl(url: String, targetView: ImageView) {
        mPicassoInstance.load(url).into(targetView)
    }

    override fun loadUri(uri: Uri, targetView: ImageView) {
        mPicassoInstance.load(uri).into(targetView)
    }

    override fun loadUrlWithPlaceHolder(url: String, 
                                        targetView: ImageView, 
                                        placeHolderRes: Int) {
        mPicassoInstance.load(url).placeholder(placeHolderRes).into(targetView)
    }

    override fun loadUrlWithError(url: String, 
                                  targetView: ImageView, 
                                  errorImageRes: Int) {
        mPicassoInstance.load(url).error(errorImageRes).into(targetView)
    }
}