If you need to get/set values of AcroForm from your PDF file and you are using the RadaeePDF Cordova plugin this article is good for you.

With GetMarkupAnnotationDetails(int pageno) you can get a list of all the Markup annotations in a page as a JSON document.

pageno: page number

Android:

String markupAnnotations = mPdfManager.GetMarkupAnnotationDetails(int pageno);

iOS:

string json = plugin.GetMarkupAnnotationDetails(page);

JSON Example:

"[{
 "left": 128.6949462890625,
 "bottom": 277.17999267578125,
 "right": 303.6849365234375,
 "top": 299.47998046875,
 "type": 9
}]"

With AddMarkupAnnotation(int pageno, int type, int index1, int index2) you can get add a markup annotation

pageno: page number

type: markup annotation type as defined by

    0: Highlight
    1: Underline
    2: StrikeOut
    3: Highlight without round corner
    4: Squiggly underline.

index1: starting character index
index2: ending character index

Android:

mPdfManager.addMarkupAnnotation(int page, int type, int index1, int index2) 

iOS:

plugin.AddMarkupAnnotation(int page, int type, int index1, int index2)

To retrieve character index from PDF points, use getCharIndex(int page, float x, float y) 

Android:

int index = mPdfmanager.getCharIndex(int page, float x, float y)

iOS:

int index = plugin.GetCharIndex(page, x, y);