how to show dialog after background task of asynctask finishes

[Suzzane Pinto]

HI;

iam trying to do upload thing iun background of my asynctask task...i want to show a message dialog telling the user that he has uploaded successfully which shud appear after my uploading...
i tried this in postexecute()

protected void onPostExecute(Void result) {
	        if (this.dialog.isShowing()) {
	            this.dialog.dismiss();
	             Intent myIntent  = new Intent(context,FinishDialog.class);
	            myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
	           context.startActivity(myIntent);
	          
	          
	        } 

and the log cat says:

04-12 09:58:25.273: E/AndroidRuntime(222): java.lang.NullPointerException
04-12 09:58:25.273: E/AndroidRuntime(222): 	at android.content.ComponentName.<init>(ComponentName.java:75)
04-12 09:58:25.273: E/AndroidRuntime(222): 	at android.content.Intent.<init>(Intent.java:2551)
04-12 09:58:25.273: E/AndroidRuntime(222): 	at com.carouseldemo.main.AndroidCustomGalleryActivity$LoginTask.onPostExecute(AndroidCustomGalleryActivity.java:314)
04-12 09:58:25.273: E/AndroidRuntime(222): 	at com.carouseldemo.main.AndroidCustomGalleryActivity$LoginTask.onPostExecute(AndroidCustomGalleryActivity.java:1)
04-12 09:58:25.273: E/AndroidRuntime(222): 	at android.os.AsyncTask.finish(AsyncTask.java:417)
04-12 09:58:25.273: E/AndroidRuntime(222): 	at android.os.AsyncTask.access$300(AsyncTask.java:127)
04-12 09:58:25.273: E/AndroidRuntime(222): 	at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)

please help

[Hussein Baghdadi]

Apparently there is a method call on a null reference, locate that line.

[Suzzane Pinto]

I just want to know how to call a new activity after background task. and the way i did is correct???

[Mohan Prasath]

I think you have to check the "context" try using getApplicationContext() instead.

[Suzzane Pinto]

no that is not possible getApplicationContext() doest wrk here......please some one help

[Tim Moores]

What is the result of you doing this:

Hussein Baghdadi wrote:Apparently there is a method call on a null reference, locate that line.

[Mohan Prasath]

Suzzane Pinto wrote:no that is not possible getApplicationContext() doest wrk here......please some one help

If you are writing the above mentioned code in your question is within an activity then you can access the get Application Context method using the this keyword.
try this.getApplicationContext(). If the onPostExecute method is not within an Activity then you have to pass the context explicitly to your function.

[Suzzane Pinto]

thankyou mohan!!

[Mohan Prasath]

You're welcome.