Android Loading Dialog Freez

I have this code in android. But when the Thread begging the loading in freezing. How can I prevent this freezing happens. Here is the code related the issue:

private void reload(final String criteria) {
        try {
myProgressDialog = ProgressDialog.show(myfiles.this,
     "Please wait...", "Loading Your Photos... Please Wait",
     false);

   new Thread() {
    public void run() {
     try {

      Thread.sleep(2000);
     } catch (Exception e) {
     }

     runOnUiThread(new Runnable() {
      @Override
      public void run() {
       // Fetch the fact

       try {
        /* here my code开发者_如何学Go  */

       } catch (Exception e) {
        myProgressDialog.dismiss();
        // TODO Auto-generated catch block
        e.printStackTrace();
       }

      }
     });
     // Dismiss the Dialog

     myProgressDialog.dismiss();
    }
   }.start();
} catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

}

It would be great if someone can check

By using runOnUiThread you are doing your intensive load task on the UI thread which will freeze the UI. You want to run your task in a background thread, and then on task completion update the ui.

Thread task = new Thread(new Runnable() {
    void run() {
       //load some data.
       // notify UI thread using Handler
    }
});
task.start();