经过10多个小时的搜索和尝试,我终于决定在这里问一下。我正在使用android.hardware.camera2
库从设备相机中获取图像。现在我想自动处理位图并解码数据矩阵代码,如果图片上有zxing库的话。有一个计时器每秒处理五次图像,一切运行良好,但它不识别任何数据矩阵代码。到目前为止,我有以下代码:
public String readDataMatrix(Bitmap bitmap) {
int width = bitmap.getWidth(),
height = bitmap.getHeight();
int[] pixels = new int[width * height];
bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
RGBLuminanceSource source = new RGBLuminanceSource(width, height, pixels);
BinaryBitmap bBitmap = new BinaryBitmap(new HybridBinarizer(source));
DataMatrixReader reader = new DataMatrixReader();
Result rawResult = null;
try {
rawResult = reader.decode(bBitmap);
String result = reader.decode(bBitmap).getText();
return result;
} catch (NotFoundException | ChecksumException | FormatException e) {
e.printStackTrace();
}
if (rawResult != null) {
Log.i(TAG, "==============================================");
Log.i(TAG, rawResult.getText());
Log.i(TAG, "==============================================");
}
return rawResult != null ? rawResult.getText() : null;
}
使用DataMatrixReader
替换QRCodeReader
并使用qr代码尝试或使用MultiFormatReader
进行尝试时,这甚至不起作用。
我尝试处理的每个图像都被zxing条形码扫描器应用程序正确解码,因此问题在于代码。
如果有人能告诉我这是如何工作的,我会很高兴,因为我相信在此之后我是创造性地诅咒的世界冠军 - java ^^
奔奔
P.S。:我在每一个关于zxing的线程中尝试过每一个解决方案,所以这真的是我的最后选择。
答案 0 :(得分:1)
public String readDataMatrix(Bitmap bitmap) {
int width = bitmap.getWidth();
height = bitmap.getHeight();
byte[] data = bitmap.getRowBytes();
Result rawResult = null;
Log.e("C2", data.length + " (" + width + "x" + height + ")");
PlanarYUVLuminanceSource source = new PlanarYUVLuminanceSource(data, width, height);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
try {
rawResult = mQrReader.decode(bitmap);
onQRCodeRead(rawResult.getText());
} catch (ReaderException ignored) {
/* Ignored */
} finally {
mQrReader.reset();
}
Result rawResult = null;
if (rawResult != null) {
Log.i(TAG, "==============================================");
Log.i(TAG, rawResult.getText());
Log.i(TAG, "==============================================");
}
return rawResult != null ? rawResult.getText() : null;
}
这对我有用,使用自定义PlanarYUVLuminanceSource:
final public class PlanarYUVLuminanceSource extends LuminanceSource {
private final byte[] mYuvData;
public PlanarYUVLuminanceSource(byte[] yuvData, int width, int height) {
super(width, height);
mYuvData = yuvData;
}
@Override
public byte[] getRow(int y, byte[] row) {
if (y < 0 || y >= getHeight()) {
throw new IllegalArgumentException("Requested row is outside the image: " + y);
}
final int width = getWidth();
if (row == null || row.length < width) {
row = new byte[width];
}
final int offset = y * width;
System.arraycopy(mYuvData, offset, row, 0, width);
return row;
}
@Override
public byte[] getMatrix() {
return mYuvData;
}
@Override
public boolean isCropSupported() {
return true;
}
}