Question

I want to show the progress dialog while loading the images in grid view.
The problem i’m facing was the current thread and Progress Dialog thread running simultaniously.

 public String Method1(){
        String output="";
        final ProgressDialog aProgDialogL = ProgressDialog.show(this, "", "Loading...");
        Thread thread = new Thread() {
            public void run () {
                //My codes
                aHandlerL.post(new Runnable() {
                    @Override
                    public void run() {
                        //Post Runnable codes
                        aProgDialogL.dismiss();
                    }
                });
            }
        };
        thread.start();

        /*
         * 
         * 
         * OTHER CODES
         * 
         * 
         */
        return output;
 }  

In the above example I need to run the code inside Progress Dialog Thread. After it finish executing i need to run my “OTHER CODES”. How to do it?
.
I tried using Async task. Before async task completes method1 gets extcuted and reurning the string.

    public String Method1(){
    String result="";
    new GetImages().execute();
    return result;

}
public class GetData extends AsyncTask<Void, Void, Integer>{

    @Override
    protected void onPreExecute() {
        aProgDialogL = ProgressDialog.show(Main.this, "", "Loading...");
    }

    @Override
    protected Integer doInBackground(Void... params) {
        //Progress Dialig Code
        return null;
    }

    @Override
    protected void onPostExecute(Integer result) {
        aProgDialogL.dismiss();
        //OTHER CODES
        super.onPostExecute(result);
    }

}

Answer 1

You can use Async task. http://developer.android.com/reference/android/os/AsyncTask.html. There is a good tutorial here. http://www.vogella.com/articles/AndroidPerformance/article.html.Also have a look at this link
http://developer.android.com/guide/components/processes-and-threads.html. Use asynctask modify it according to your needs.

     doInBackground()- For long running operations. Don't update ui here.
     onPreExecute()- update ui before running the operatio nin background.
     onPostExecute()- update ui after running the operation.