如何为Android应用程序生成二维码?

I need to create a qrcode in my android application, and I need a library or source code that lets me create a QR Code in an Android app.

我需要在我的android应用程序中创建一个qrcode，我需要一个库或源代码，让我在android应用程序中创建二维码。

The library I need must:

我需要的图书馆必须:

not leave a watermark (like onbarcode library)
不留下水印(如onbarcode库)
not use web service API to create the qrcode (like Google's library zxing)
不使用web服务API创建qrcode(如谷歌的库zxing)
not need 3rd party installers (like QR Droid)
不需要第三方安装程序(比如QR Droid)

I already created such code for iPhone (Objective-C) but I need a quick fix for Android until I have time to make a QR Code generator of my own. It's my first android project so any help will be appreciated.

我已经为iPhone (Objective-C)创建了这样的代码，但我需要对Android进行快速修复，直到我有时间制作自己的二维码生成器。这是我的第一个android项目，所以任何帮助都会受到感激。

6 个解决方案

#1

Have you looked into ZXING? I've been using it successfully to create barcodes. You can see a full working example in the bitcoin application src

你调查过ZXING吗?我已经成功地使用它来创建条形码。您可以在比特币应用程序src中看到完整的工作示例。

// this is a small sample use of the QRCodeEncoder class from zxing
try {
    // generate a 150x150 QR code
    Bitmap bm = encodeAsBitmap(barcode_content, BarcodeFormat.QR_CODE, 150, 150);

    if(bm != null) {
        image_view.setImageBitmap(bm);
    }
} catch (WriterException e) { //eek }

#2

with zxing this is my code for create QR

zxing这是我的二维码

 QRCodeWriter writer = new QRCodeWriter();
    try {
        BitMatrix bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, 512, 512);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                bmp.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);
            }
        }
        ((ImageView) findViewById(R.id.img_result_qr)).setImageBitmap(bmp);

    } catch (WriterException e) {
        e.printStackTrace();
    }

#3

Maybe this old topic but i found this library is very helpful and easy to use

也许这个老话题，但是我发现这个库很有用，很容易使用

QRGen

example for using it in android

在android中使用它的例子

 Bitmap myBitmap = QRCode.from("www.example.org").bitmap();
ImageView myImage = (ImageView) findViewById(R.id.imageView);
myImage.setImageBitmap(myBitmap);

#4

Here is my simple and working function to generate a Bitmap! I Use ZXing1.3.jar only! I've also set Correction Level to High!

这是我生成位图的简单而有效的函数!我使用ZXing1.3。罐子!我也把校正水平设置到高!

PS: x and y are reversed, it's normal, because bitMatrix reverse x and y. This code works perfectly with a square image.

x和y是反向的，这是正常的，因为位矩阵反向x和y。这段代码非常适合方形图像。

public static Bitmap generateQrCode(String myCodeText) throws WriterException {
    Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
    hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // H = 30% damage

    QRCodeWriter qrCodeWriter = new QRCodeWriter();

    int size = 256;

    ByteMatrix bitMatrix = qrCodeWriter.encode(myCodeText,BarcodeFormat.QR_CODE, size, size, hintMap);
    int width = bitMatrix.width();
    Bitmap bmp = Bitmap.createBitmap(width, width, Bitmap.Config.RGB_565);
    for (int x = 0; x < width; x++) {
        for (int y = 0; y < width; y++) {
            bmp.setPixel(y, x, bitMatrix.get(x, y)==0 ? Color.BLACK : Color.WHITE);
        }
    }
    return bmp;
}

EDIT

编辑

It's faster to use bitmap.setPixels(...) with a pixel int array instead of bitmap.setPixel one by one:

使用位图. setpixels(…)使用像素int数组而不是位图会更快。setPixel一个接一个:

        BitMatrix bitMatrix = writer.encode(inputValue, BarcodeFormat.QR_CODE, size, size);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            int offset = y * width;
            for (int x = 0; x < width; x++) {
                pixels[offset + x] = bitMatrix.get(x, y) ? BLACK : WHITE;
            }
        }

        bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);

#5

I used zxing-1.3 jar and I had to make some changes implementing code from other answers, so I will leave my solution for others. I did the following:

我使用了zxt -1.3 jar，并且必须对实现其他答案的代码做一些更改，所以我将把我的解决方案留给其他人。我做了以下几点:

1) find zxing-1.3.jar, download it and add in properties (add external jar).

1)找到zx - 1.3。jar，下载并添加属性(添加外部jar)。

2) in my activity layout add ImageView and name it (in my example it was tnsd_iv_qr).

2)在我的活动布局中添加ImageView并命名它(在我的示例中是tnsd_iv_qr)。

3) include code in my activity to create qr image (in this example I was creating QR for bitcoin payments):

3)在我创建二维码的活动中包含代码(在本例中，我为比特币支付创建二维码):

    QRCodeWriter writer = new QRCodeWriter();
    ImageView tnsd_iv_qr = (ImageView)findViewById(R.id.tnsd_iv_qr);
    try {
        ByteMatrix bitMatrix = writer.encode("bitcoin:"+btc_acc_adress+"?amount="+amountBTC, BarcodeFormat.QR_CODE, 512, 512);
        int width = 512;
        int height = 512;
        Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                if (bitMatrix.get(x, y)==0)
                    bmp.setPixel(x, y, Color.BLACK);
                else
                    bmp.setPixel(x, y, Color.WHITE);
            }
        }
        tnsd_iv_qr.setImageBitmap(bmp);
    } catch (WriterException e) {
        //Log.e("QR ERROR", ""+e);

    }

If someone is wondering, variable "btc_acc_adress" is a String (with BTC adress), amountBTC is a double, with, of course, transaction amount.

如果有人想知道，变量“btc_acc_adress”是一个字符串(带有BTC adress)， amountBTC是一个双精度的，当然，还有事务量。

#6

zxing does not (only) provide a web API; really, that is Google providing the API, from source code that was later open-sourced in the project.

zxing(仅)不提供web API;实际上，这是谷歌提供的API，来自后来项目中开放源代码的源代码。

As Rob says here you can use the Java source code for the QR code encoder to create a raw barcode and then render it as a Bitmap.

正如Rob所说，您可以使用二维码编码器的Java源代码来创建原始条形码，然后将其呈现为位图。

I can offer an easier way still. You can call Barcode Scanner by Intent to encode a barcode. You need just a few lines of code, and two classes from the project, under android-integration. The main one is IntentIntegrator. Just call shareText().

我可以提供更简单的方法。您可以调用条形码扫描器来编码条形码。在android-integration下，您只需要几行代码，以及来自项目的两个类。最主要的是集成电路。就叫shareText()。

#1