Question

Is it possible to pass a File to AsyncTask? Like this?

public class UploadImagesTask extends AsyncTask<String, String, File> {
    @Override
    protected File doInBackground(String... params) {

and would I access that file by doing this?

params[2]

Answer 1

Not like that, no.

If you want to pass in a String and a File, you’ll need to do something like this, and trust yourself not to screw up the arguments.

public class DoThing extends AsyncTask<Object, String, File> {
    @Override
    protected File doInBackground(Object... params) {
        String stringy = (String) params[0];
        File file = (File) params[1];
        // do hard work
        return file;
    }
}

Since all your arguments extend Object, when you call the thing, it’ll look like this:

String aString = stringGettingMethod();
File aFile = fileGettingMethod();
new DoThing().execute(aString, aFile);

Alternately, you can pass whatever you want in through constructor arguments.