Retrieve contents of file on SD card. Android

public void getFile(){
//Get the text file
        File file = new File(newFolder,"MyTest.txt");

//Read text from file
        StringBuilder text = new StringBuilder();

        try {
            BufferedReader br = new BufferedReader(new FileReader(file));
            String line;

            while ((line = br.readLine()) != null) {
                text.append(line);
                text.append('\n');
            }
            br.close();
        }
        catch (IOException e) {
            Log.i("TAG","ERROR." + e);
        }

//Find the view by its id
        TextView tv = (TextView)findViewById(R.id.showFile);

//Set the text
        tv.setText(text.toString());
    }