Android中的二维码生成与扫描功能

/* 
* content：二维码内容 
* widthPix：二维码宽度 
* heightPix：二维码高度 
* logoBm：二维码中间的logo对应的Bitmap 
*/ 
public static Bitmap createQRCode(String content,int widthPix,int heightPix,Bitmap logoBm)

/** 
 * 创建、展示二维码并将bitmap保存在本地 
 */ 
 private void create() { 
 int width = DensityUtil.dip2px(this,200); 
 Bitmap bitmap = EncodingUtils.createQRCode("http://www.baidu.com",width,BitmapFactory.decoderesource(getresources(),R.drawable.ic_launcher)); 
 iv_zxing.setImageBitmap(bitmap); 
 saveBitmap(bitmap); 
 } 
 /** 
 * 将Bitmap保存在本地 
 * 
 * @param bitmap 
 */ 
 public void saveBitmap(Bitmap bitmap) { 
 // 首先保存图片 
 File appdir = new File(Environment.getExternalStorageDirectory(),"zxing_image"); 
 if (!appdir.exists()) { 
  appdir.mkdir(); 
 } 
 String filename = "zxing_image" + ".jpg"; 
 File file = new File(appdir,fileName); 
 try { 
  FiLeoutputStream fos = new FiLeoutputStream(filE); 
  bitmap.compress(CompressFormat.JPEG,100,fos); 
  fos.flush(); 
  fos.close(); 
 } catch (Exception E) { 
  e.printStackTrace(); 
 } 
 // 把文件插入到系统图库 
 try { 
  MediaStore.Images.Media.insertImage(this.getContentResolver(),file.getAbsolutePath(),filename,null); 
 } catch (FileNotFoundException E) { 
  e.printStackTrace(); 
 } 
 // 通知图库更新 
 sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCAnnER_SCAN_FILE,Uri.parse("file://" + "/sdcard/namecard/"))); 
} 

 /** 
 * 打开二维码扫描 
 */ 
private void open() { 
 config(); 
 startActivityForResult(new Intent(MainActivity.this,CaptureActivity.class),0); 
} 
/** 
 * 提高屏幕亮度 
 */ 
private void config() { 
 WindowManager.LayoutParams lp = getWindow().getAttributes(); 
 lp.screenBrightness = 1.0f; 
 getWindow().setAttributes(lp); 
} 
@Override 
protected void onActivityResult(int requestCode,int resultCode,Intent data) { 
 super.onActivityResult(requestCode,resultCode,data); 
 if (resultCode == RESULT_OK) { 
 Bundle bundle = data.getExtras(); 
 String result = bundle.getString("result"); 
 tv_result.setText(result); 
 } 

/** 
* 打开本地图片 
*/ 
private void openLocalImage() { 
 // 打开手机中的相册 
 Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT); 
 innerIntent.setType("image/*"); 
 Intent wrapperIntent = Intent.createChooser(innerIntent,"选择二维码图片"); 
 this.startActivityForResult(wrapperIntent,0x01); 
} 

@Override 
 protected void onActivityResult(int requestCode,data); 
 if (resultCode == RESULT_OK) { 
  switch (requestCodE) { 
  case 0x01: 
  // 获取选中图片的路径 
  cursor cursor = getContentResolver().query(data.getData(),null,null); 
  if (cursor.moveToFirst()) { 
   photo_path = cursor.getString(cursor.getcolumnIndex(MediaStore.Images.Media.DATA)); 
  } 
  cursor.close(); 
  new Thread(new Runnable() { 
   @Override 
   public void run() { 
   Result result = scAnningImage(photo_path); 
   if (result != null) { 
    handleDecode(result,new Bundle()); 
   } 
   } 
  }).start(); 
  break; 
  } 
 } 
} 

/** 
 * A valid barcode has been found,so give an inDication of success and show 
 * the results. 
 * 
 * @param rawResult 
 *  The contents of the barcode. 
 * @param bundle 
 *  The extras 
 */ 
 public void handleDecode(Result rawResult,Bundle bundlE) { 
 inactivityTimer.onActivity(); 
 beepManager.playBeepSoundAndVibrate(); 
 Intent resulTintent = new Intent(); 
 bundle.puTint("width",mCropRect.width()); 
 bundle.puTint("height",mCropRect.height()); 
 bundle.putString("result",rawResult.getText()); 
 resulTintent.putExtras(bundlE); 
 this.setResult(RESULT_OK,resulTintent); 
 CaptureActivity.this.finish(); 
}

/** 
 * 扫描二维码图片的方法 
 * 
 * @param path 
 * @return 
 */ 
 public Result scAnningImage(String path) { 
 if (TextUtils.isEmpty(path)) { 
  return null; 
 } 
 Hashtable<DecodeHintType,String> hints = new Hashtable<DecodeHintType,String>(); 
 hints.put(DecodeHintType.CHARACTER_SET,"UTF8"); // 设置二维码内容的编码 
 BitmapFactory.options options = new BitmapFactory.options(); 
 options.inJustDecodeBounds = true; // 先获取原大小 
 scanBitmap = BitmapFactory.decodeFile(path,options); 
 options.inJustDecodeBounds = false; // 获取新的大小 
 int sampleSize = (int) (options.outHeight / (float) 200); 
 if (sampleSize <= 0) 
  sampleSize = 1; 
 options.inSampleSize = sampleSize; 
 scanBitmap = BitmapFactory.decodeFile(path,options); 
 int width = scanBitmap.getWidth(); 
 int height = scanBitmap.getHeight(); 
 int[] pixels = new int[width * height]; 
 scanBitmap.getPixels(pixels,height); 
 /** 
 * 第三个参数是图片的像素 
 */ 
 RGBLuminancesource source = new RGBLuminancesource(width,height,pixels); 
 BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(sourcE)); 
 QRCodeReader reader = new QRCodeReader(); 
 try { 
  return reader.decode(bitmap1,hints); 
 } catch (NotFoundException E) { 
  e.printStackTrace(); 
 } catch (checksumException E) { 
  e.printStackTrace(); 
 } catch (FormatException E) { 
  e.printStackTrace(); 
 } 
 return null; 
 } 

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYstemS"/> 
<uses-permission android:name="android.permission.CAMERA"/> 
<uses-permission android:name="android.permission.VIBRATE"/> 
<activity android:name="com.example.zxingtest.zxing.activity.CaptureActivity"/>