Java file read/write

            public void onClick(View v) {
                String hID = id.getText().toString();
                String hName = name.getText().toString();
                String hLocation =  location.getText().toString();
                String details = hID + " " + hName + " " + " " +hLocation+"\n";
                System.out.println(details);
                try {
                    FileOutputStream fos = openFileOutput("file.txt",MODE_APPEND);
                    fos.write(details.getBytes(StandardCharsets.UTF_8));
                    System.out.println("Success");
                    fos.close();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }


            public void onClick(View v) {
                try {
                    FileInputStream fis = openFileInput("file.txt");
                    InputStreamReader isr =  new InputStreamReader(fis);
                    BufferedReader br = new BufferedReader(isr);
                    StringBuilder sb = new StringBuilder();
                    String text;
                    while((text = br.readLine())!=null)
                    {
                        sb.append(text);
                        sb.append("\n");
                        System.out.println(text+"Asd");
                    }
                    op.setText(sb.toString());
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }