字符串 转换成 二维码

/**将字符串  转换成  二维码   调用 generateQRCode(string)
* Created by tangzheng on 2016/8/4.
*/
public class StringToQRCode {
private Bitmap bitMatrix2Bitmap(BitMatrix matrix) {
int w = matrix.getWidth();
int h = matrix.getHeight();
int[] rawData = new int[w * h];
for (int i = 0; i < w; i++) {
for (int j = 0; j < h; j++) {
int color = Color.WHITE;
if (matrix.get(i, j)) {
color = Color.BLACK;
}
rawData[i + (j * w)] = color;
}
}

Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.RGB_565);
bitmap.setPixels(rawData, 0, w, 0, 0, w, h);
return bitmap;
}

public   Bitmap generateQRCode(String content) {
try {
QRCodeWriter writer = new QRCodeWriter();
BitMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, 500, 500);
return bitMatrix2Bitmap(matrix);
} catch (WriterException e) {
e.printStackTrace();
}
return null;
}
}