/**
     * 掃碼槍掃碼處理
     */
    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            int keyCode = event.getKeyCode();
            char aChar = (char) event.getUnicodeChar();
            if (aChar != 0) {
                mStringBufferResult.append(aChar);
            }
            mHandler.removeCallbacks(mScanningFishedRunnable);
            //若為回車(chē)鍵，直接返回
            if (keyCode == KeyEvent.KEYCODE_ENTER) {
                mHandler.post(mScanningFishedRunnable);
            } else {
                //延遲post，若500ms內(nèi)，有其他事件
                mHandler.postDelayed(mScanningFishedRunnable, 500L);
            }
            return true;
        }
        return super.dispatchKeyEvent(event);
    }

 /**
 * 二維碼信息對(duì)象
 */
   private QRCode qrCodeBean;
   /**
   * 二維碼信息原始數(shù)據(jù)容器
   */
   private StringBuilder mStringBufferResult = new StringBuilder();
   private Handler mHandler = new Handler();
   
   private Runnable mScanningFishedRunnable = new Runnable() {
        @Override
        public void run() {
            scanOk = false;
            String qrcode = mStringBufferResult.toString();
            if (!TextUtils.isEmpty(qrcode)) {
                // 掃碼確定參數(shù)
                Gson gson = new Gson();
                try {
                    qrCodeBean = gson.fromJson(qrcode, QRCode.class);
                    // 你的代碼...
                    // 如果要支持中文，數(shù)據(jù)用可以URLEncoder/URLDecoder編解碼
                } catch (JsonSyntaxException e) {
                    // 解析失敗...
                } catch (UnsupportedEncodingException e) {
                    // 解碼失敗...
                } finally {
                    mStringBufferResult.setLength(0);
                }
            }
        }
    };