Android编程实现二维码的生成与解析

// 生成QR图private void createImage() {  try {   // 需要引入core包   QRCodeWriter writer = new QRCodeWriter();   String text = qr_text.getText().toString();   Log.i(TAG, "生成的文本：" + text);   if (text == null || "".equals(text) || text.length() < 1) {    return;   }   // 把输入的文本转为二维码   BitMatrix martix = writer.encode(text, BarcodeFormat.QR_CODE,     QR_WIDTH, QR_HEIGHT);   System.out.println("w:" + martix.getWidth() + "h:"     + martix.getHeight());   Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();   hints.put(EncodeHintType.CHARACTER_SET, "utf-8");   BitMatrix bitMatrix = new QRCodeWriter().encode(text,     BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);   int[] pixels = new int[QR_WIDTH * QR_HEIGHT];   for (int y = 0; y < QR_HEIGHT; y++) {    for (int x = 0; x < QR_WIDTH; x++) {     if (bitMatrix.get(x, y)) {      pixels[y * QR_WIDTH + x] = 0xff000000;     } else {      pixels[y * QR_WIDTH + x] = 0xffffffff;     }    }   }   Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT,     Bitmap.Config.ARGB_8888);   bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);   qr_image.setImageBitmap(bitmap);  } catch (WriterException e) {   e.printStackTrace();  }}

// 解析QR图片private void scanningImage() {  Map<DecodeHintType, String> hints = new HashMap<DecodeHintType, String>();  hints.put(DecodeHintType.CHARACTER_SET, "utf-8");  // 获得待解析的图片  Bitmap bitmap = ((BitmapDrawable) qr_image.getDrawable()).getBitmap();  RGBLuminanceSource source = new RGBLuminanceSource(bitmap);  BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source));  QRCodeReader reader = new QRCodeReader();  Result result;  try {   result = reader.decode(bitmap1, hints);   // 得到解析后的文字   qr_result.setText(result.getText());  } catch (NotFoundException e) {   e.printStackTrace();  } catch (ChecksumException e) {   e.printStackTrace();  } catch (FormatException e) {   e.printStackTrace();  }}