package com.create.qrcode;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Handler;
import android.util.Base64;

public class CreateQRCodeActivity extends Activity { 
   
 private Bitmap bitmap;
 private Handler mHandler = new Handler();
 @Override
 public void onCreate(Bundle savedInstanceState) { 
   
 super.onCreate(savedInstanceState);
// String content = "E67";
 new Thread(new Runnable() { 
   
 
 public void run() { 
   
 // TODO Auto-generated method stub
// String content = GetImageStr("/mnt/sdcard/test.jpg");
// String str = hex2bin(content);
 String str = "testing...";
 System.out.println("str : " + str);
 long a = System.currentTimeMillis();
 bitmap = CreateQRCodeActivity.this.createBitmap(str);
 final long b = System.currentTimeMillis();
 System.out.println("bitmap 耗时：" + (b - a) + ",bitmap : " + bitmap);
 mHandler.post(new Runnable() { 
   
 
 public void run() { 
   
 setContentView(new BitmapView(CreateQRCodeActivity.this, bitmap));
 long c = System.currentTimeMillis();
 System.out.println("setContentview 耗时：" + (c - b));
 }
 });
 }
 }).start();
 }


 /
 * 十六进制转换字符串
 * @param hex String 十六进制
 * @return String 转换后的字符串
 */
 public static String hex2bin(String hex) { 
   
 String digital = "0ABCDEF";
 char[] hex2char = hex.toCharArray();
 byte[] bytes = new byte[hex.length() / 2];
 int temp;
 for (int i = 0; i < bytes.length; i++) { 
   
 temp = digital.indexOf(hex2char[2 * i]) * 16;
 temp += digital.indexOf(hex2char[2 * i + 1]);
 bytes[i] = (byte) (temp & 0xff);
 }
 return new String(bytes);
 }

 public static String GetImageStr(String imgFilePath) { 
   
 if (imgFilePath == null || imgFilePath == "") { 
   
 return "";
 }
 File file = new File(imgFilePath);
 if (!file.exists()) { 
   
 return "";
 }
 byte[] data = null;
 try { 
   
 InputStream in = new FileInputStream(imgFilePath);
 data = getByte(in);
 in.close();
 } catch (IOException e) { 
   
 e.printStackTrace();
 }
 String imageString = Base64.encodeToString(data, Base64.DEFAULT);
 return imageString;
 }

 public static byte[] getByte(InputStream in) { 
   
 if (in == null) { 
   
 return null;
 }
 int sumSize = 0;
 List<byte[]> totalBytes = new ArrayList<byte[]>();
 byte[] buffer = new byte[1024];
 int length = -1;
 try { 
   
 while ((length = in.read(buffer)) != -1) { 
   
 sumSize += length;
 byte[] tmp = new byte[length];
 System.arraycopy(buffer, 0, tmp, 0, length);
 totalBytes.add(tmp);
 }
 byte[] data = new byte[sumSize];
 int start = 0;
 for (byte[] tmp : totalBytes) { 
   
 System.arraycopy(tmp, 0, data, start, tmp.length);
 start += tmp.length;
 }
 return data;
 } catch (IOException e) { 
   
 e.printStackTrace();
 }
 return null;
 }

 public Bitmap createBitmap(String str) { 
   
 try { 
   
 BitMatrix matrix = new MultiFormatWriter().encode(str, BarcodeFormat.QR_CODE, 300, 300);
 int width = matrix.width;
 int height = matrix.height;
 int[] pixels = new int[width*height];
 for(int y = 0; y<width; ++y){ 
   
 for(int x = 0; x<height; ++x){ 
   
 if(matrix.get(x, y)){ 
   
 pixels[y*width+x] = 0xff000000; // black pixel
 } else { 
   
 pixels[y*width+x] = 0xffffffff; // white pixel
 }
 }
 }
 Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
 bmp.setPixels(pixels, 0, width, 0, 0, width, height);
 return bmp;
 } catch (WriterException e) { 
   
 e.printStackTrace();
 }
 return null;
 }


}

package com.create.qrcode;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.View;

public class BitmapView extends View { 
   
 Bitmap bitmap;

 public BitmapView(Context context, Bitmap bitmap) { 
   
 super(context);
 this.bitmap = bitmap;
 }
 
 @Override
 protected void onDraw(Canvas canvas) { 
   
 Paint paint = new Paint();
 paint.setFilterBitmap(true);
 
 double aspectRatio = ((double)bitmap.getWidth())/bitmap.getHeight();
 Rect dest = new Rect(0,0,this.getWidth(), (int)(this.getHeight()/aspectRatio));
 canvas.drawBitmap(bitmap, null, dest, paint);
 }
}