Android onPreExecute cannot show a ProgressDialog

Question

So, I have my AsyncTask as below:

private class AsyncRetriever extends AsyncTask<IotdHandler,Void,IotdHandler>{
        ProgressDialog pDialog;
        @Override
        protected void onPreExecute(){
            pDialog = new ProgressDialog(getApplicationContext());
            pDialog.setMessage(getResources().getString(R.string.toast_msg1));
            pDialog.show();
        }
//------------------------------------------------------------------------------

This is an inner class of the MainActivity. However, LogCat flags pDialog.show() as an error.
It says, Unable to start activity ComponentInfo.

How do I solve this?

I dont see any problem in this code dude.I have used this same piece of code so many times. — Spring Breaker, Jul 31 '13 at 07:54
use `pDialog = new ProgressDialog(MainActivity.this)`. and what is the error? — Raghunandan, Jul 31 '13 at 07:54
Try with `ProgressDialog pDialog = new ProgressDialog(MainActivity.this);`. — g00dy, Jul 31 '13 at 07:58

score 3 · Accepted Answer · answered Jul 31 '13 at 07:54

3

A ProgressDialog needs an Activity Context. Try this:

pDialog = new ProgressDialog(YourActivity.this);

answered Jul 31 '13 at 07:54

Steve Benett

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Tried, worked. Just for information `getApplicationContext()` should do the same as what u said, right ? – An SO User Jul 31 '13 at 07:55
@LittleChild check this for details http://stackoverflow.com/questions/7298731/when-to-call-activity-context-or-application-context – Raghunandan Jul 31 '13 at 07:57
I think this [post](http://stackoverflow.com/questions/7298731/when-to-call-activity-context-or-application-context) makes this question clear. – Steve Benett Jul 31 '13 at 07:57

score 1 · Answer 2 · answered Jul 31 '13 at 09:49

private class AsyncRetriever extends AsyncTask<IotdHandler,Void,IotdHandler>{
    ProgressDialog pDialog;
Context mcontext;
public AsyncRetriever(Context c){
   mcontext=c
}
    @Override
    protected void onPreExecute(){
        pDialog = new ProgressDialog(mcontext);
        pDialog.setMessage(getResources().getString(R.string.toast_msg1));
        pDialog.show();
    }

pass the context of calling class in this constructor

Android onPreExecute cannot show a ProgressDialog

2 Answers2