用字符串生成二维码

需要导入Zxing.jar包import android.graphics.Bitmap;import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;public class ZxingCode {/** * 用字符串生成二维码 * @param str*/  public static Bitmap Create2DCode(String str){  //生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败  BitMatrix matrix = null;try {matrix = new MultiFormatWriter().encode(str,BarcodeFormat.QR_CODE, 500, 500);} catch (WriterException e) {e.printStackTrace();return null;}  int width = matrix.getWidth();  int height = matrix.getHeight();  //二维矩阵转为一维像素数组,也就是一直横着排了  int[] pixels = new int[width * height];  for (int y = 0; y < height; y++) {  for (int x = 0; x < width; x++) {  if(matrix.get(x, y)){  pixels[y * width + x] = 0xff000000;  }  }  }  Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);  //通过像素数组生成bitmap,具体参考api  bitmap.setPixels(pixels, 0, width, 0, 0, width, height);  return bitmap;  }  }

 

需要导入Zxing.jar包