How to call a RESTful Method from Android?

Question

I\'ve tried two different ways to call a simple REST method from Android; said REST method - which works from other clients - simply returns an int val such as 17.

Both

Answer 1

I've got it working now. There's an article about it here.

This is the code from there without any explanation:

public class MainActivity extends ActionBarActivity {

    private GetDepartmentsCount _getDeptsCount;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button getDeptsCountBtn = (Button)findViewById(R.id.DeptsCountBtn);
        getDeptsCountBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                _getDeptsCount = new GetDepartmentsCount();
                _getDeptsCount.execute("http://10.0.2.2:28642/api/Departments/GetCount?serialNum=4242");
            }
        });
    }

    @Override
    public void onStop() {
        super.onStop();
        _getDeptsCount.cancel(true);
    }

    private class GetDepartmentsCount extends AsyncTask<String, String, String> {

        @Override
        protected String doInBackground(String... params) {

            String urlString = params[0]; // URL to call
            String result = "";

            // HTTP Get
            try {
                URL url = new URL(urlString);
                HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                InputStream inputStream = urlConnection.getInputStream();
                if (null != inputStream)
                    result = IOUtils.toString(inputStream);
            } catch (Exception e) {
                System.out.println(e.getMessage());
                return e.getMessage();
            }
            return result;
        }

        @Override
        protected void onPostExecute(String result) {
            EditText dynCount = (EditText)findViewById(R.id.dynamicCountEdit);
            dynCount.setText(result + " records were found");
            Log.i("FromOnPostExecute", result);
        }
    } 

}