[Solved] Why data from server is not coming in the form of listview?

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You are getting data from server in async task and immediately after calling async task yor are assigning data to your adapter which is wrong.

Your code:

new GetData().execute();
//  Collections.addAll(lst, "abc","bc");
//  Collections.addAll(sublst,"pass","v");

    cd=new CustomAdapter(Data.this, lst, sublst);//you will not get data here...
    lv.setAdapter(cd);

make sure that you create your adapter object in post exeute of aysnc task.

@Override
        protected void onPostExecute(String result) {
            // TODO Auto-generated method stub

            super.onPostExecute(result);
cd=new CustomAdapter(Data.this, lst, sublst);//add this line
    lv.setAdapter(cd);//add this line
            Toast.makeText(Data.this,"Progress",Toast.LENGTH_LONG).show();  
            tv.setText(z+"ab");

        }

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solved Why data from server is not coming in the form of listview?