Ask AsyncTask to call other activity by value problems

I ask you in an activity using the AsyncTask in the onPostExecute call and returns the value of the other activity codes are as follows :
Intent intent = new Intent ();
Bundle bundle = new Bundle ();
bundle.putString ("op_flag", "P");
bundle.putString ("cate_id", cate_id);
intent.setClass (Product.this, ProductList.class);
Product.this.startActivity (intent);
then
ProductList used
Bundle bundle = this.getIntent (). getExtras ();
find bundle is empty
I ask this question is what ? Is not so in the thread can not write ?
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seemingly did not see you go on the intent Bundle definition , ah ,
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Well, I 2 of the
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