content: package com.google.zxing.encoding;
  
  import android.graphics.Bitmap;
  
  import com.google.zxing.BarcodeFormat;
  import com.google.zxing.EncodeHintType;
  import com.google.zxing.MultiFormatWriter;
  import com.google.zxing.WriterException;
  import com.google.zxing.common.BitMatrix;
  
  import java.util.Hashtable;
  
  /**
   * @author Ryan Tang
   *
   */
  public final class EncodingHandler {
  	private static final int BLACK = 0xff000000; //色块可以改变二维码的颜色
  	private static final int BACKGROUNDCOLRO = 0xfff9f9f9;//生成的Bitmap的背景色
  
  	public static Bitmap createQRCode(String str,int widthAndHeight) throws WriterException {
  		Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
          hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
  
  		BitMatrix matrix = new MultiFormatWriter().encode(str,
  				BarcodeFormat.QR_CODE, widthAndHeight, widthAndHeight);
  		int width = matrix.getWidth();
  		int height = matrix.getHeight();
  		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] = BLACK;
  				}else{
  					pixels[y * width + x] = BACKGROUNDCOLRO; //解决此Bitmap保存到本地图片变黑色的bug
  				}
  			}
  		}
  		Bitmap bitmap = Bitmap.createBitmap(width, height,
  				Bitmap.Config.ARGB_8888);
  		bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
  		return bitmap;
  	}
  }
  