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Android: ProgressDialog not showing in AsyncTask called in onCreate()

I have a AsyncTask which will be executed in the onCreate method. However, my ProgressDialog isn't showing up. And from debugging, it is confirmed that the AsyncTask is being executed.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lifestyle);
context = getApplicationContext();
new testAsync().execute();
}
private class testAsync extends AsyncTask<Void,Void,Void> {
private ProgressDialog pDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this); // tried with context, no difference
pDialog.setTitle("Inserting sample data");
pDialog.setMessage("Please wait. This dialog will be dismissed upon completion.");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
// TableControllerReadings TCR = new TableControllerReadings(context);
// TCR.insertSampleData(getApplicationContext());
new Timer().schedule(new TimerTask() {
#Override
public void run() {
//delay for 5 seconds
}
}, 5000);
return null;
}
#Override
protected void onPostExecute(Void v) {
pDialog.dismiss();
}
}

Take your pDialog.dismiss(); into the your timer thread.
Reason: onPostExecute() immediately call because on background task is finished.
Its seprate thread which is on delay so cursor move to the onPostExecute()
private class testAsync extends AsyncTask<Void, Void, Void> {
private ProgressDialog pDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this); // tried with context, no difference
pDialog.setTitle("Inserting sample data");
pDialog.setMessage("Please wait. This dialog will be dismissed upon completion.");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
// TableControllerReadings TCR = new TableControllerReadings(context);
// TCR.insertSampleData(getApplicationContext());
new Timer().schedule(new TimerTask() {
#Override
public void run() {
//delay for 5 seconds
pDialog.dismiss();
}
}, 5000);
return null;
}
#Override
protected void onPostExecute(Void v) {
// pDialog.dismiss();
}
}

Activity will not show any view until onResume method is called. If your AsyncTask execution completes before onResume call then you will never see the ProgressDialog.
So better call new testAsync().execute(); in onResume

add pDialog.show(); in doInBackground and add new testAsync().execute(); in onResume

Your code is working fine with Thread.sleep(5000); if you want to add delay then use Thread.Sleep(/time in milisec/) instead of Timer.Schedule. Because of Timer.Schedule async task is executing so quickly before showing any dialog.

ProgressDialog sometimes get error in asyncTask

it's something weird , sometimes when I come to my activiity , it calls a asyncTask , this is the code where i use ProgressDialog
ProgressDialog ringProgressDialog ;
#Override
protected void onPreExecute()
{
super.onPreExecute();
ringProgressDialog= ProgressDialog.show(Myactivity.this, null,"message", true);
}
#Override
protected void onPostExecute(String result)
{
super.onPostExecute(result);
ringProgressDialog.dismiss();
}
somedays the asynctask get error ,I wanted to post the error but somehow I don't have the error .
What is the problem of this ?Why it sometimes get error and sometimes it works fine ?
I'm sure the problem is from progressDialog .
Thanks

ProgressDialog ringProgressDialog ;
#Override
protected void onPreExecute() {
super.onPreExecute();
ringProgressDialog= ProgressDialog.show(getApplicationContext(), null,"message", true);
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if(ringProgressDialog.isShowing())
ringProgressDialog.dismiss();
}

try it the other way
ProgressDialog pDialog;
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(Activity.this);
pDialog.setMessage("Fetching News...");
pDialog.setCancelable(false);
pDialog.show();
}

Try this way,hope this will help you to solve your problem.
public void getDataFromServer(final Context context){
new AsyncTask<Void,Void,Void>(){
ProgressDialog ringProgressDialog ;
#Override
protected void onPreExecute() {
super.onPreExecute();
ringProgressDialog= ProgressDialog.show(context, null,"message", true);
}
#Override
protected Void doInBackground(Void... params) {
// write your service call code here
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
ringProgressDialog.dismiss();
}
}.execute();
}

ProgressDialog pDialog;
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog("Your Activity");
pDialog.setMessage("Your message");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
pDialog.dismiss();
}

WindowManager$BadTokenException near dialog.show in AsyncTask android

How to show a dialog box in AsyncTask. Getting BadToketException in dialog.show();
I tried many ways but I could not solve it.
Also tried to pass context to the dialog box in different ways, but it is giving me the same result.
public class RetriveStock extends AsyncTask<Void, Void, Void> {
#Override
protected Void doInBackground(Void... params) {
message = client.clientReceive(1); // I get data here.
return null;
}
#Override
protected void onCancelled() {
super.onCancelled();
}
#Override
protected void onPostExecute(Void result) {
if (message.contains("AlertExecuted:")) {
final Dialog dialog = new Dialog(CreateAlert.this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.display_dialog);// Dialog layout
TextView dialogText = (TextView) dialog.findViewById(R.id.digMsg);
dialogText.setText("Alert Executed!");
Button ok = (Button) dialog.findViewById(R.id.ok);
ok.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
try {
dialog.show(); //WindowManager$BadTokenException
} catch (Exception e) {
e.printStackTrace();
}
}
super.onPostExecute(result);
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
Please help.

protected void onPreExecute() {
// TODO Auto-generated method stub
// progressDialog = ProgressDialog.show(this, "", "loading news content");
progressDialog = new ProgressDialog(context , AlertDialog.THEME_HOLO_LIGHT);
progressDialog.setMessage(""+getString(R.string.laodnews));
progressDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.animate));
progressDialog.setCancelable(false);
progressDialog.show();
}
start dailoge in pre execute and stop in onpostexecute..

is CreateAlert registered activity in manifest..if not then you have to pass registered activity context

Show progressDialog in Android

I want to show a progressDialog on my page when the user clicks on the button.On click of button i am sorting my results that is a List.Now how can we show a progressDialog on click of a button.Please suggest me
This function i am using to sort that data :
public void sortByDate(View v) {
Collections.sort(tripParseData.getDetails());
setData(tripParseData);
}
After #Monica Suggestion
public void sortByDate(View v) {
new LoadData().execute();
}
class LoadData extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
Collections.sort(tripParseData.getCoroprateBookingDetails());
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
progressDialog.dismiss();
setApprovalDetailsData(tripParseData);
}
}

you have to call progressdiolog.show before the long calculation starts and then the calculation has to run in a separate thread. A soon as this thread is finished, you have to call pd.dismiss() to close the prgoress dialog.
here you can see an example:
the progressdialog is created and displayed and a thread is called to run a heavy calculation:
Override
public void onClick(View v) {
pd = ProgressDialog.show(lexs, "Search", "Searching...", true, false);
Search search = new Search( ... );
SearchThread searchThread = new SearchThread(search);
searchThread.start();
}
and here the thread:
private class SearchThread extends Thread {
private Search search;
public SearchThread(Search search) {
this.search = search;
}
#Override
public void run() {
search.search();
handler.sendEmptyMessage(0);
}
private Handler handler = new Handler() {
#Override
public void handleMessage(Message msg) {
displaySearchResults(search);
pd.dismiss();
}
};
}
Don't forget to vote me up :)

Paste This Class in ur activity and call new LoadData().execute to start the prgress dialog :
class LoadData extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
ProgressDialog pg=new ProgressDialog(ChartsActivity.this);
pg=pg.show(ChartsActivity.this, "Loding", "Plz Wait...");
}
#Override
protected Void doInBackground(Void... params) {
sortByDate();
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
pg.dismiss();
}
}

I have not tested it but I think it can help you.
Declare these two objects in your class and member variables.
Thread thread = null;
ProgressDialog bar = null;
Use this logic on your button click listener it can work in your case. I have not tested it but It will give you Idea how things should work. you can also use handlemessage in place of runonuithread
if (thread == null
|| (thread != null && !thread.isAlive())) {
thread = new Thread(new Runnable() {
#Override
public void run() {
runOnUiThread(new Runnable() {
#Override
public void run() {
//DISPLAY YOUR PROGRESS BAR HERE.
bar = ProgressDialog.show(getApplicationContext(), "LOADING..", "PLEASE WAIT..");
}
});
// SORT COLLECTION HERE
runOnUiThread(new Runnable() {
#Override
public void run() {
//CLOSE YOUR PROGRESS BAR HERE.
bar.dismiss();
}
});
}
});
thread.start();
}
Hope this will help you.

try to use AsyncTask http://developer.android.com/reference/android/os/AsyncTask.html
Sample code:
AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() {
#Override
protected void onPreExecute() {
//Show UI
//Start your progress bar
showProgress();
}
#Override
protected Void doInBackground(Void... arg0) {
// do your sorting process
return null;
}
#Override
protected void onPostExecute(Void result) {
//Show UI
//dismiss your progress bar
hideProgress();
}
};
task.execute((Void[])null);
Show and hide progress code
public void showProgress() {
progressDialog = ProgressDialog.show(this, "",
"Loading. Please wait...");
progressDialog.setCancelable(false);
}
public void hideProgress() {
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
}

Dismiss a dialog when a thread is done

I'm creating a thread in android for a time consuming operation. I want the main screen to show a progress dialog with a message informing that the operation is in progress, but I want that dialog to dismiss once the thread is done. I've tried with join but it locks the thread and doesn't show the dialog. I tried using:
dialog.show();
mythread.start();
dialog.dismiss();
but then the dialog doesn't show. How can I make that sequence but wait for the thread to end without locking the main thread?
This is as far as I got:
public class syncDataElcanPos extends AsyncTask<String, Integer, Void> {
ProgressDialog pDialog;
Context cont;
public syncDataElcanPos(Context ctx) {
cont=ctx;
}
protected void onPreExecute() {
pDialog = ProgressDialog.show(cont,cont.getString(R.string.sync), cont.getString(R.string.sync_complete), true);
}
protected Void doInBackground(String... parts) {
// blablabla...
return null;
}
protected void onProgressUpdate(Integer... item) {
pDialog.setProgress(item[0]); // just for possible bar in a future.
}
protected void onPostExecute(Void unused) {
pDialog.dismiss();
}
But when I try to execute it, it gives me an exception: "Unable to add window".

When your thread is done, use the runOnUIThread method to dismiss the dialog.
runOnUiThread(new Runnable() {
public void run() {
dialog.dismiss();
}
});

To do that there is two ways to do it , ( and i prefer the first second one : AsyncTask ) :
First : you display your alertDialog , and then on the method run() you should do like this
#override
public void run(){
//the code of your method run
//....
.
.
.
//at the end of your method run() , dismiss the dialog
YourActivity.this.runOnUiThread(new Runnable() {
public void run() {
dialog.dismiss();
}
});
}
Second : Using an AsyncTask like this :
class AddTask extends AsyncTask<Void, Item, Void> {
protected void onPreExecute() {
//create and display your alert here
pDialog = ProgressDialog.show(MyActivity.this,"Please wait...", "Downloading data ...", true);
}
protected Void doInBackground(Void... unused) {
// here is the thread's work ( what is on your method run()
items = parser.getItems();
for (Item it : items) {
publishProgress(it);
}
return(null);
}
protected void onProgressUpdate(Item... item) {
adapter.add(item[0]);
}
protected void onPostExecute(Void unused) {
//dismiss the alert here where the thread has finished his work
pDialog.dismiss();
}
}

well in AsyncTask in the on postexecute you can call dismiss
here is an example from other thread
class AddTask extends AsyncTask<Void, Item, Void> {
protected void onPreExecute() {
pDialog = ProgressDialog.show(MyActivity.this,"Please wait...", "Retrieving data ...", true);
}
protected Void doInBackground(Void... unused) {
items = parser.getItems();
for (Item it : items) {
publishProgress(it);
}
return(null);
}
protected void onProgressUpdate(Item... item) {
adapter.add(item[0]);
}
protected void onPostExecute(Void unused) {
pDialog.dismiss();
}
}