android：zxing条码扫描成功但不从活动返回

我成功地使用zxing来扫描代码,通过调用安装的条形码读取器的意图,但是当它发出哔声并表示良好的扫描时,我期望zxing活动会返回控制,@R_284_9447@处理结果,但是它坐在那里并尝试再次扫描.我必须按后退按钮,然后返回,我可以做下一步.当我打电话给扫描仪时,有没有一些明显的标志？

任何建议感激不尽.非常感谢.

这是我的代码：

public Boolean onTouchEvent(final MotionEvent event) {

    Intent intent = new Intent("com.google.zxing.client.android.SCAN");
    intent.putExtra("com.google.zxing.client.android.SCAN.SCAN_MODE","QR_CODE_MODE");
    startActivityForResult(intent,0);

    return true;
    }

public void onActivityResult(int requestCode,int resultCode,Intent intent) {

    super.onActivityResult(requestCode,resultCode,intent);

    if (requestCode == 0) {
        if (resultCode == RESULT_OK) {
            String contents = intent.getStringExtra("SCAN_RESULT");
            String format = intent.getStringExtra("SCAN_RESULT_FORMAT");

            // Handle successful scan

            String s = "http://www.google.com/search?q=";
            s += contents;
            Intent myIntent1 = new Intent(Intent.ACTION_VIEW,Uri.parse(s));
            startActivity(myIntent1);
            }
        else 
            if (resultCode == RESULT_CANCELED) {
                // Handle cancel
                }
            }
        }
    }