Android progress dialog while getting data from sqlite

I tried to implement threads, asynctask from examples on the we开发者_运维技巧b but none of them run the way I want.

I have a class to send data to a web server. It contains 3 tasks: -grab an id -get data from sql and build a json file -send the json file

I'd like to implement a progress dialog or progressbar to show progress to the user waiting.

The progressdialog I last tested to show data grabbing from sqlite was based on Progress Bar Example. Trouble is that when I try to generate my file more than 2 times, the thread is not starting...

So whats's the best to be done in my case ? I have a spinner to select what to send and a button to send.

When button is clicked, basically I have:

HttpResponse response = GetChantier(commentaire);
    //Checking response 
    if( response != null)
    {
        String _response=EntityUtils.toString(response.getEntity());
        int chantier_serveur = Integer.parseInt(_response.replaceAll("[\n\r]", ""))
        String fichier = DonneesToJson(db,chantier, chantier_serveur);
        HttpResponse response = SendJson ( chantier, fichier);
    }

I'd need to implement a progress for DonneesToJson and SendJson.

DonnesToJson grabs a cursor then build a json file while iterating the cursor. SendJson is an HttpPost that sends a file and 2 fields.

I'm really new to java programming and threads. Any help appreciated.

Regards.

Use Async task for doing Background task as follows.

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);  
    new Asyn_Task().execute("name","title");
}


class Asyn_Task extends AsyncTask<Void, Void, Void> {
    private final ProgressDialog dialog = new ProgressDialog(Facebook_Post_View.this);
    // can use UI thread here
    protected void onPreExecute() {
        this.dialog.setMessage("Loading...");
        this.dialog.setCancelable(false);
        this.dialog.show();
    }
    @Override
    protected Void doInBackground(String... param) {
        // TODO Auto-generated method stub
                    name=params[0]; //Like
                    title=params[1];

         // Do your all Stuffs
       return null;
    }

    @Override
    protected void onPostExecute(Void result) {

        if (this.dialog.isShowing()) {
            this.dialog.dismiss();
        }
    }
}

In these at position 0 name will available and at position 1 title will available.Similarly you can pass values as you like..

For further reference check this Async Task