QR코드 생성

ㅇ build.gradle
compile 'com.journeyapps:zxing-android-embedded:3.0.0@aar'
compile 'com.google.zxing:core:3.2.0'
compile 'com.google.zxing:javase:2.2'
 
public class CreateQRCode {

    private String account;
    private String name;
    private String amount;

    public CreateQRCode(){

    }

    public CreateQRCode(String account, String name, String amount){
        this.account = account;
        this.name    = name;
        this.amount  = amount;
    }

    public void create(){
        ArrayList<String> list = new ArrayList<String>();
            list.add(this.account);
            list.add(this.name);
            list.add(this.amount);

        String content = getContents(list).toString();

        // content UTF-8 변환
        Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

        MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
        BitMatrix bitMatrix = null;

        try {

            bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 200, 200, hints);

            File dirs = new File(Environment.getExternalStorageDirectory(), "/Pictures/QRCode");
            OutputStream outStream = null;

            try {

                if (!dirs.exists()) { // 원하는 경로에 폴더가 있는지 확인
                    dirs.mkdirs(); // 폴더 생성
                }

                /**
                 * 생성할 QR코드의 저장 경로 및 파일명(확장자 포함) 지정
                 */
                String ex_storage  = Environment.getExternalStorageDirectory().getAbsolutePath();// Get Absolute Path in External Sdcard
                String folder_name = "/Pictures/QRCode/"; // Set folder in absolute path
                String path        = ex_storage+folder_name;

                String fileName = String.valueOf(getDateTime())+".jpg";

                outStream = new FileOutputStream(path+fileName);

                int height = bitMatrix.getHeight();
                int width  = bitMatrix.getWidth();

                /**
                 * bitmap으로 QR코드 생성
                 */
                Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

                for (int x = 0; x < width; x++){
                    for (int y = 0; y < height; y++){
                        bitmap.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);
                    }
                }

                bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);

                outStream.close();

            } catch (IOException e) {
                e.printStackTrace();
            }

        } catch (WriterException e) {
            Log.d("WriterException ",e.getMessage());
            e.printStackTrace();
        } catch (Exception e){
            e.printStackTrace();
        }

    }

    /**
     * QR코드에 입력할 내용을 콤마로 구분
     * @param list
     * @return
     */
    private static StringBuilder getContents(ArrayList<String> list){
        StringBuilder sb = new StringBuilder();

        for(int i=0; i<list.size(); i++){
            sb.append(list.get(i));

            if(i != (list.size()-1))
                sb.append(",");
        }

        return sb;
    }

    /**
     * QR코드 bitmap 파일 이름
     * @return
     */
    private static StringBuilder getDateTime(){
        Calendar cal = Calendar.getInstance();

        int year  = cal.get(Calendar.YEAR);
        int month = cal.get(Calendar.MONTH)+1;
        int date = cal.get(Calendar.DATE);
//
//        String time = String.valueOf(System.currentTimeMillis()).substring(0,6);

        long sysTime = System.currentTimeMillis();

        SimpleDateFormat dayTime = new SimpleDateFormat("hhmmss");
        String time = dayTime.format(new Date(sysTime));

        StringBuilder sb = new StringBuilder();
            sb.append(year).append(month).append(date).append(time);

        return sb;
    }

}