java - Load online images in <img> tag with itext -


i'm using xmlworker in itextpdf library convert xhtml pdf.

in xhtml content there tag local storage images , images internet.

eg:

<img src="https://www.w3schools.com/images/w3schools_green.jpg" alt="w3schools.com" style="width:104px;height:142px;"/>

with local images, have implemented imageprovider provide resource root path. these images internet, cannot loaded.

i tried override image retrieve(string src) method of abstractimageprovider load images internet, got networkonmainthread exception. don't know how use asynctask or other wars load online images , return inside image retrieve(string src).

i've searched in internet , people use imageprovider local images. ideas me?

i don't understand question without context. may fit question.

create callback inside imageprovider. every time asynctask (or helps make request) gives response, trigger it.

public class imageprovider { private onimageprovidercallback callback;  public imageprovider(onimageprovidercallback callback) {     this.callback = callback; }  public onimageprovidercallback getcallback() {     return callback; }  public void setcallback(onimageprovidercallback callback) {     this.callback = callback; }  public interface onimageprovidercallback {     void onretrievedimage(image image); }  public void retrive() {     new asynctask<void, void, image>() {         @override         protected image doinbackground(void... voids) {             // request image here             if(request.success()) {                 return request.getimage();             }else{                 // handle error                 return null;             }         }          @override         protected void onpostexecute(image image) {             super.onpostexecute(image);             callback.onretrievedimage(image);         }     }.execute(); } }

then in activity , make done calling this

new imageprovider(new imageprovider.onimageprovidercallback() {         @override         public void onretrievedimage(image image) {             // image         }     });

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