列表视图像按钮

Question

我在我的应用程序中使用Listview，现在我想添加一个类似按钮。

  public void likeButton(View view)

    {

        new PostComment().execute();

         }

PostComment课程

 class PostComment extends AsyncTask<String, String, String> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(MainActivity.this);
        pDialog.setMessage("Posting Comment...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
        pDialog.show();
    }

    @Override
    protected String doInBackground(String... args) {
        // TODO Auto-generated method stub
        // Check for success tag
       int success;



        // Just random dummy data
        // I need to get the real values
        String user = "44";
        String post = "12";




        try {
            // Building Parameters
            ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("user_id", user));
            params.add(new BasicNameValuePair("post_id", post));


            Log.d("request!", "starting");

            //Posting user data to script
            JSONObject json = jsonParser.makeHttpRequest(
                    POST_COMMENT_URL, "POST", params);

            // full json response
            Log.d("Post Comment attempt", json.toString());

            // json success element
            success = json.getInt(TAG_SUCCESS);
            if (success == 1) {

                return json.getString(TAG_MESSAGE);
            }else{
                Log.d("Comment Failure!", json.getString(TAG_MESSAGE));
                return json.getString(TAG_MESSAGE);

            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

        return null;

    }

    protected void onPostExecute(String file_url) {
        // dismiss the dialog once product deleted
        pDialog.dismiss();
        if (file_url != null){
            Toast.makeText(MainActivity.this, file_url, Toast.LENGTH_LONG).show();
        }

    }

}

到目前为止，虚拟数据被添加到我的mysql数据库中。但不是虚拟数据：

        // Just random dummy data
        // I need to get the real values here
        String user = "44";
        String post = "12";

我希望得到特定帖子的真实post_id，点击按钮。目前，我在列表视图中显示post_id，并在帖子中显示textview。但是如何将这个post_id传递给String post =“”;？