Export database into csv

• add permission in manifest

public void exportCsv() {

        File folder = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS).toString() + "/" + "SQLiteBackup");
        boolean isFolderCreated = false;

        if (!folder.exists()) {
            isFolderCreated = folder.mkdir();
        }

        String filePathAndName = folder.toString() + "/" + "SQLite_Backup.csv";

        try {
            //write csv file
            FileWriter fw = new FileWriter(filePathAndName);
            for (int i = 0; i < itemList.size(); i++) {
                fw.append("").append(String.valueOf(itemList.get(i).getFoodID()));
                fw.append(",");
                fw.append("").append(itemList.get(i).getFoodName());
                fw.append(",");
                fw.append("").append(String.valueOf(itemList.get(i).getImageId()));
                fw.append("\n");
            }
            fw.flush();
            fw.close();
        } catch (Exception e) {
            Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
            Log.e("====", Objects.requireNonNull(e.getMessage()));
        }
    }