主要思路

1.导入Zxing包，根据架包MultiFormatWriter类 ，将字符串宽高，计算出一定时间内x,y偏移量 生成对应的黑白图片。

1.客户端代码

Button generateQRCodeButton = (Button) this

.findViewById(R.id.btn_add_qrcode);

generateQRCodeButton.setOnClickListener(new OnClickListener(){

@Override

public void onClick(View view) {

String contentString = qrStrEditText.getText().toString();

if (!contentString.equals("")) {

// 根据字符串生成条形码图片并显示在界面上，第二个参数为图片的大小(350*350)

Bitmap qrCodeBitmap=null;

qrCodeBitmap= BarcodeCreater.creatBarcode(contentString, 120, 60);

bg.setImageBitmap(qrCodeBitmap);

} else {

Toast.makeText(MainActivity.this, "Text can not be empty", Toast.LENGTH_SHORT.show();

}

}

2.条形码生成代码

private static final int BLACK = 0xff000000;

private static final int WHITE = 0xFFFFFFFF;

private static BarcodeFormat barcodeFormat= BarcodeFormat.CODE_128;

public static Bitmap creatBarcode(String contents, int desiredWidth,int desiredHeight) {

MultiFormatWriter writer = new MultiFormatWriter();

BitMatrix result=null;

try {

result = writer.encode(contents, barcodeFormat, desiredWidth,

desiredHeight);

} catch (WriterException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

int width = result.getWidth();

int height = result.getHeight();

int[] pixels = new int[width * height];

// All are 0, or black, by default

for (int y = 0; y < height; y++) {

int offset = y * width;

for (int x = 0; x < width; x++) {

pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;

}

}

Bitmap bitmap = Bitmap.createBitmap(width, height,

Bitmap.Config.ARGB_8888);

bitmap.setPixels(pixels, 0, width, 0, 0, width, height);

return bitmap;

}