zxing-android中Reader的reset()

如果您一步一步地调试ZXing源代码,您将看到reset()对所有读取器都没有任何作用,除了 RSS14读取器 和 RSS扩展读取器 .

什么都不做:

@Override
  public void reset() {
    // do nothing
  }

RSS14Reader.reset():

@Override
  public void reset() {
    possibleLeftPairs.clear();
    possibleRightPairs.clear();
  }

RSSExpandedReader.reset()

@Override
  public void reset() {
    this.pairs.clear();
    this.rows.clear();
  }

如果你只想读二维码,那没什么区别。例如:

String[] fileNames = new String[]{"qrcode-1.jpg", "qrcode-2.jpg"};
File file = null;
BufferedImage image = null;
RGBLuminanceSource source = null;
BinaryBitmap bitmap = null;
Result result = null;
MultiFormatReader reader = new MultiFormatReader();

try {
    for (String fileName : fileNames) {
        file = new File(fileName);
        image = ImageIO.read(file);
        System.out.println(image.getWidth() + ", " + image.getHeight());
        int[] pixels = image.getRGB(0, 0, image.getWidth(), image.getHeight(), null, 0, image.getWidth());
        source = new RGBLuminanceSource(image.getWidth(), image.getHeight(), pixels);
        bitmap = new BinaryBitmap(new HybridBinarizer(source));
        result = reader.decode(bitmap);
        System.out.println(result.getText());
        //reader.reset();
    }
}
catch (Exception exception) {
    System.out.println(exception);
}