尝试使用ZXing,ZBar及其分叉等多个库,但没有找到扫描条形码的方法,而不是从相机而是从文件中扫描条形码。
有人能指出我正确的方向吗?我最好看看ZXing:如何从文件中扫描图像(而不是从相机中扫描)。
请
答案 0 :(得分:10)
最后,我找到了解决方案。代码是(源自here):
import com.google.zxing.*;
public static String scanQRImage(Bitmap bMap) {
String contents = null;
int[] intArray = new int[bMap.getWidth()*bMap.getHeight()];
//copy pixel data from the Bitmap into the 'intArray' array
bMap.getPixels(intArray, 0, bMap.getWidth(), 0, 0, bMap.getWidth(), bMap.getHeight());
LuminanceSource source = new RGBLuminanceSource(bMap.getWidth(), bMap.getHeight(), intArray);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Reader reader = new MultiFormatReader();
try {
Result result = reader.decode(bitmap);
contents = result.getText();
}
catch (Exception e) {
Log.e("QrTest", "Error decoding barcode", e);
}
return contents;
}
Gradle引用为:
dependencies {
compile 'com.google.zxing:core:3.2.1'
}
用法:
InputStream is = new BufferedInputStream(new FileInputStream(file));
Bitmap bitmap = BitmapFactory.decodeStream(is);
String decoded=scanQRImage(bitmap);
Log.i("QrTest", "Decoded string="+decoded);