问二维码-如何操作？

EN

protected void  onActivityResult(int requestCode,int resultCode,Intent data){
     IntentResult result = IntentIntegrator.parseActivityResult(requestCode,resultCode,data);
     if(result != null){
         if(result.getContents()==null){
             Toast.makeText(this,"cancelled", Toast.LENGTH_LONG).show();
         }
        else{
             resultado.setText(result.getContents());
         }
     }
     else {
         super.onActivityResult(requestCode,resultCode,data);
      }
     }