How to search within a file?

Question

Android

Actually, the task arose - to put a text file into the /assets folder, do a search on it and return the result. But IO Exception persists, I am attaching a piece of code that directly does this.

String str = null;


        try {




            LineNumberReader lnr = new LineNumberReader(new BufferedReader(
                   new InputStreamReader(getAssets().open("elements.txt"))));
                   
            String inp = comp.getText().toString();

            Pattern p1 = Pattern.compile(inp + " = (\\w+).*"); 
            while (((str = lnr.readLine()) != null)) {
                Matcher m = p1.matcher(str);
                if (m.find()) {
                    fin = m.group(1);
                    res.setText(fin);
                    //res.setText(m.group(1));
                }
                lnr.close();
            }
        } catch (IOException iо) {
            res.setText("Error!");
        }
    }

A huge request, kind people, if my code is completely dead, write a working version, I will be very grateful.

Answer 1

it is not clear from the code where the problem could be, apparently the Exception comes from the file system, for which reason it can only be determined by the Message and Trace of this Exception, which you did not write. I think you need to rewrite a piece

catch (IOException io) { res. setTex("Error!");

so that it prints an error rather than a meaningful "Error!"