I have a class that reads from an input file fine
but when I add it to an Async thread it errors on openFileInput with
the method being undefined even though I
have imported exactly the same classes
Am I not allowed to use this method in the background?

code snippet is:
public class buildcustomer extends AsyncTask<TextView ,Integer ,String
> {
                @Override
                protected String doInBackground(TextView... tv) {
                  try {
                                  FileInputStream         inFile  =
openFileInput("customer.csv");
                                  InputStreamReader       isr     = new
InputStreamReader(inFile);
                                  BufferedReader          in      = new 
BufferedReader(isr);

                                  while(!end){
                                    String l_line = in.readLine();
....

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