java 使用Zxing从手机上存储的图像中解码二维码（在Android手机上）
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Decoding qr code from image stored on the phone with Zxing (on Android phone)
提问by DixieFlatline
I have an app that receives qr code from the server. I want to decode it (not with intent and camera) and display the text it contains in my app. I have alredy done this in Java SE with jars from zxing with this code:
我有一个从服务器接收二维码的应用程序。我想解码它（不是用意图和相机）并在我的应用程序中显示它包含的文本。我已经在 Java SE 中使用 zxing 的 jars 使用以下代码完成了此操作：
private class QRCodeDecoder {
public String decode(File imageFile) {
BufferedImage image;
try {
image = ImageIO.read(imageFile);
} catch (IOException e1) {
return "io outch";
}
// creating luminance source
LuminanceSource lumSource = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(lumSource));
// barcode decoding
QRCodeReader reader = new QRCodeReader();
Result result = null;
try {
result = reader.decode(bitmap);
} catch (ReaderException e) {
return "reader error";
}
return result.getText();
}
}
But on Android, BufferedImage is not found. Has anyone decoded qr code on android from image stored on the phone? Tnx.
但是在 Android 上，找不到 BufferedImage。有没有人从存储在手机上的图像解码 android 上的二维码？恩克斯。
回答by nut
In android,you can do it this way:
在android中，你可以这样做：
@Override
protected Result doInBackground(Void... params)
{
try
{
InputStream inputStream = activity.getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
if (bitmap == null)
{
Log.e(TAG, "uri is not a bitmap," + uri.toString());
return null;
}
int width = bitmap.getWidth(), height = bitmap.getHeight();
int[] pixels = new int[width * height];
bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
bitmap.recycle();
bitmap = null;
RGBLuminanceSource source = new RGBLuminanceSource(width, height, pixels);
BinaryBitmap bBitmap = new BinaryBitmap(new HybridBinarizer(source));
MultiFormatReader reader = new MultiFormatReader();
try
{
Result result = reader.decode(bBitmap);
return result;
}
catch (NotFoundException e)
{
Log.e(TAG, "decode exception", e);
return null;
}
}
catch (FileNotFoundException e)
{
Log.e(TAG, "can not open file" + uri.toString(), e);
return null;
}
}
回答by soxunyi
Download ZXing from google code, and this class file: ZXing-1.6/zxing-1.6/androidtest/src/com/google/zxing/client/androidtest/RGBLuminanceSource.javacan help you.
从谷歌代码下载ZXing，这个类文件：ZXing-1.6/zxing-1.6/androidtest/src/com/google/zxing/client/androidtest/RGBLuminanceSource.java可以帮助你。
回答by jon
Quickmark and qr droid actually reads out what the code says, and you can decode barcodes saved on your phone. Hit the menu button when your load the image and select share, find decode qr droid or decode quickmark, and the'll do the magic. I prefer quickmark for reading codes, because it tells me what is typed in the code.
Quickmark 和 qr droid 实际上会读出代码的内容，您可以解码保存在手机上的条形码。加载图像时点击菜单按钮并选择共享，找到解码 qr droid 或解码快速标记，然后就可以了。我更喜欢使用 quickmark 阅读代码，因为它告诉我代码中输入了什么。
