如何使用Android移动应用程序单击网页上的按钮

Question

For this site

What i am trying to simulate is clicking the button "7" using HttpClient POST and then retrieving the value of the Input screen of the calculator using JSoup and setting it in an edit text box on the android app. The code is running fine with no errors, but i am getting a blank entry.

I utilized HttpClient of Apache library. Here is the code

    // Title AsyncTask
private class Title extends AsyncTask<Void, Void, Void> {
    String title, response1;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();

    }

    @Override
    protected Void doInBackground(Void... params) {
        try {
            makePostRequest();
            //postData("");
            // Connect to the web site
            Document document = Jsoup.connect(url).get();
            // Get the html document title

            title = document.title();
            Elements E1 = document.select("input[name=Input]");
            Element E2 = E1.first();
            title = E2.val();

        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        // Set title into TextView
        EditText txttitle = (EditText) findViewById(R.id.editText);
        txttitle.setText(title);
        mProgressDialog.dismiss();
    }

    private void makePostRequest() {


        HttpClient httpClient = new DefaultHttpClient();
        // replace with your url
        HttpPost httpPost = new HttpPost(url);


        //Post Data
        List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(1);

        nameValuePair.add(new BasicNameValuePair("seven",""));


        //Encoding POST data
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
        } catch (UnsupportedEncodingException e) {
            // log exception
            e.printStackTrace();
        }

        //making POST request.
        try {
            HttpResponse response = httpClient.execute(httpPost);
            // write response to log
            Log.d("Http Post Response:", response.toString());
        } catch (ClientProtocolException e) {
            // Log exception
            e.printStackTrace();
        } catch (IOException e) {
            // Log exception
            e.printStackTrace();
        }

    }


}

Does anyone have any idea what i am doing wrong here? The website is not mine and therefore i cannot add JavaScript. Am new to Android and Java Programming.

Please let me know if i can provide any other information i may have missed here.

Thank you.

Answer 1

You can monitor network using your browser. On chrome shortcut is ctrl+shift+i . Select the network tab, do the action you want and watch what http requests is being sent. In your case no requests is send because that calculator works purely in browser and making no connections to server. That means you need to interpret javascript. Such work is excellently carried by library called Selenium webdriver . It's a headless web browser that you can control from your code. Try it.

EDIT: Selenium do not work on Android. Android has built in view that you can use as browser - WebView. And it can run javascript functions. You can do javascript calls. Look here and here . Good luck