Loading spinner not showing correctly - spinner

Question

I am trying to put a spinner while my data is loaded and UI updated so for this task I do this:
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_road_details);
setTitle("Details");
startButt = (Button)findViewById(R.id.BeginJourney);
Map = (Button)findViewById(R.id.map_btn1);
boolean GreenButtState = getIntent().getBooleanExtra("GreenButtState", false);
boolean FastButtonState = getIntent().getBooleanExtra("FastButtonState", false);
AsyncTask<Void, Void, Void> LoadingTask = new AsyncTask<Void, Void, Void>()
{
ProgressDialog dialog = new ProgressDialog(RoadDetails.this);
#Override
protected void onPreExecute()
{
this.dialog.setMessage("Message");
this.dialog.show();
}
#Override
protected Void doInBackground(Void... params)
{
final HashMap<String, Object> trip1;
Intent intent = getIntent();
mXmlRpcUrl = intent.getStringExtra("XmlRpcUrl");
mSessionID = intent.getStringExtra("SessionID");
mGetSavedTripFunc = intent.getStringExtra("GetSavedTripFunc");
newTripID = intent.getIntExtra("newTripID", 0);
variantID = intent.getIntExtra("VariantID", 0);
Week = intent.getIntExtra("WeekState", 0);
CityName = intent.getStringExtra("NameOfCity");
Flag = intent.getIntExtra("Flag", 0);
startLatitude = intent.getDoubleExtra("startLatitude", 0.0);
startLongitude = intent.getDoubleExtra("startLongitude", 0.0);
endLatitude = intent.getDoubleExtra("endLatitude", 0.0);
endLongitude = intent.getDoubleExtra("endLongitude", 0.0);
trip1 = (HashMap<String, Object>) intent.getSerializableExtra("Variant");
variant = new Variant();
variant.Read(trip1);
startButt.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
Intent intent = new Intent(RoadDetails.this, Localisation.class);
intent.putExtra("SessionID", mSessionID);
intent.putExtra("XmlRpcUrl", mXmlRpcUrl);
intent.putExtra("NewTripID", newTripID);
intent.putExtra("VariantID", variantID);
intent.putExtra("WeekState", Week);
intent.putExtra("NameOfCity", CityName);
intent.putExtra("Variant", (Serializable)trip1);
intent.putExtra("Flag", Flag);
intent.putExtra("startLatitude", startLatitude);
intent.putExtra("startLongitude", startLongitude);
intent.putExtra("endLatitude", endLatitude);
intent.putExtra("endLongitude",endLongitude);
startActivity(intent);
}
});
Map.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
//Intent intent1 = new Intent (RoadDetails.this, MapDraw.class);
Intent intent1 = new Intent (RoadDetails.this, OSMActivity.class);
intent1.putExtra("SessionID",mSessionID);
intent1.putExtra("endLatitude", endLatitude);
intent1.putExtra("endLongitude",endLongitude);
intent1.putExtra("startLatitude", startLatitude);
intent1.putExtra("startLongitude", startLongitude);
intent1.putExtra("Variant", (Serializable)trip1);
startActivity(intent1);
}
});
return null;
}
#Override
protected void onPostExecute(Void result)
{
GettingData();
this.dialog.dismiss();
}
};
LoadingTask.execute((Void[])null);
}
However when I do this there is a delay before opening the the activity that contains this code (I want the spinner to be there while the data is loaded) the spinner is not showing. There is just a delay (for the data to be loaded - lets also call it screen freeze for a 1 - 3 seconds) and thats it. What am I doing wrong? I want the spinner to show while the data is loaded and after that to be dismissed. I also what to mention that in the method GettingData(); I am changing the UI - adding Layouts dynamically, adding images etc.

Answer 1

try this...this will work
ProgressDialog dialog = new ProgressDialog(RoadDetails.this);
this.dialog.setMessage("Message");
this.dialog.show();
//start your asynchronous task here
load your data here
//end asynchronous task
this.dialog.dismiss();

Answer 2

write ProgressDialog dialog; outside AsyncTask then
call
dialog = new ProgressDialog(RoadDetails.this);
dialog.setMessage("Message");
dialog.show();
inside onPreExecute().
Hope it will help you..