Unable to add window exception when using Asynctask in button click event in getView Method of BaseAdapter?

Question

I'm unable to display the progress dialog in preexecute method of asynctask class when a button is clicked in getView method of my baseadapter. When pDialog.show() method id called I'm getting "Unable to add window exception" exception. When I removed preexecute method it is working fine. Can someone explain why this is happening.

here is my code:

    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(context);
        pDialog.setMessage("Please wait..");
        pDialog.setCancelable(false);
        pDialog.show();  
    }

This is my button click event code:

 holder.buttonid.setOnClickListener(new OnClickListener() 
    {
        @Override
        public void onClick(View v) 
        {
            try 
            {
                new MyAsyncTask().execute();                        
            } catch (Exception e)
            {
                e.printStackTrace();
            }               
        }
    });

This is my BadeAdapter class

public class FriendListAdapter extends BaseAdapter {

private Context context;
private LayoutInflater inflater=null;

private ArrayList<MyObject> mDisplayedValues;


static class ViewHolder 
{  
    ImageView img_friend; 
    TextView  tvname_friend;
    Button  btnstatus_friend;  
}

public FriendListAdapter(Context context, ArrayList<MyObject> arrayList) {
     inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     this.context = context;

     this.mDisplayedValues = arrayList; 

 }

@Override
public int getCount() {
    // TODO Auto-generated method stub
    return mDisplayedValues.size();
}

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return position;
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    View view =convertView;
    ViewHolder holder = null;


    if(convertView==null) 
    {
         view = inflater.inflate(R.layout.inflate_view,parent,false);
         holder = new ViewHolder();


         holder.buttonid= (Button)view.findViewById(R.id.btnid);

         view.setTag(holder);
    }
    else
    {
        holder = (ViewHolder)view.getTag();
    }
        try   
{



    holder.buttonid.setOnClickListener(new OnClickListener() 
{
    @Override
    public void onClick(View v) 
    {
        try 
        {
            new MyAsyncTask().execute();                        
        } catch (Exception e)
        {
            e.printStackTrace();
        }               
    }
});

} catch (Exception e) 
{
       e.printStackTrace(); 
}   

    return view;
}




private class MyAsyncTask extends AsyncTask<String, Void, Void> {

    private ProgressDialog pDialog = null;

    private boolean hasExceptionOccured = false;


    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(context);  
        pDialog.setMessage("Please wait..");
        pDialog.setCancelable(false);
        pDialog.show();

    } 

    @Override
    protected Void doInBackground(String... params) {
        // TODO Auto-generated method stub
        //Intent to next activity

        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        super.onPostExecute(result);
        if (pDialog.isShowing())
            pDialog.dismiss();


    }


} 



}

But why are you calling in that method. Show your BaseAdapter class here — Piyush, Mar 05 '14 at 08:55
Did you see the first question? what is context? the application context? or the activity context? — Merlevede, Mar 05 '14 at 09:00
@anirudhmaddy Means Context context = getApplicationContext(). Something like this? — Piyush, Mar 05 '14 at 09:05

score 0 · Accepted Answer · edited May 23 '17 at 12:06

0

You need to use the context of the activity to show a Dialog

pDialog = new ProgressDialog(YourActivity.this);

Here some more information.

edited May 23 '17 at 12:06

Community

1
1

answered Mar 05 '14 at 09:12

Merlevede

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Unable to add window exception when using Asynctask in button click event in getView Method of BaseAdapter?

1 Answers1