How to display a progressbar while connecting with server in android?

Question

Here is my method to connect to server and get the response in MyUtilitiesActivity (timeout code based on this answer by kuester2000).

 private static response = "";
public static String send(final Activity act, final String url, final String keys[], final String values[]) 
{ 
    try{
        HttpParams httpParameters = new BasicHttpParams();
        // Set the timeout in milliseconds until a connection is established.

        HttpConnectionParams.setConnectionTimeout(httpParameters, 5000);
        // Set the default socket timeout (SO_TIMEOUT) 
        // in milliseconds which is the timeout for waiting for data.

        HttpConnectionParams.setSoTimeout(httpParameters, 5000);  

        HttpClient httpclient = new DefaultHttpClient(httpParameters);
        if(keys == null && values == null)
        {

            HttpGet get = new HttpGet(url);   
            // Execute HTTP Get Request 
            response = httpclient.execute(get, new BasicResponseHandler()).trim();  
             
        }
        else if(keys != null && values != null && keys.length == values.length)
        {
            // Add your data   
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();

            for (int i = 0; i < values.length; i++)
            {
                nameValuePairs.add(new BasicNameValuePair(keys[i], values[i])); 
            }

            HttpPost post = new HttpPost(url);
            post.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            response = httpclient.execute(post, new BasicResponseHandler()).trim();  

        } 

    }
    catch (Exception e) 
    {
        response = e + "";
        e.printStackTrace();
    }
    return response ;  

}

And i'am calling the above method on click of a button in MyTestActivity.

public onClick(View v)
{
String response =  MyUtilitiesActivity.send(MyTestActivity.this,    "http://www.google.com", null, null);

 //the code to be execute after getting the response from server
 }

Where do i display the progress bar? Inside onclick of a button or inside send() method? How to display it ? Please help me.

Answer 1

Use AsyncTask concept which is known as Painless Threading in Android.

1. Put your send() method in Async's doInBackGround()
2. Start progress dialog at onPreExecute
3. and dismisss on onPostExecute().