public class tab1task extends Fragment {

ArrayList<String> tasks= new ArrayList<String>();
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    final View view1= inflater.inflate(R.layout.tasktab1,container,false);



    Button add_task = (Button) view1.findViewById(R.id.addtask);
    add_task.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            tasks.add("");
            ListView listView = (ListView) view1.findViewById(R.id.alltasks);

            customAdapter customAdapter = new customAdapter();

            listView.setAdapter(customAdapter);
        }
    });
    ListView listView = (ListView) view1.findViewById(R.id.alltasks);

    customAdapter customAdapter = new customAdapter();
    listView.setAdapter(customAdapter);
    return view1;

}





class customAdapter extends BaseAdapter {

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

        View view = getActivity().getLayoutInflater().inflate(R.layout.addtaskcustomlayout,null);
        EditText task = (EditText) view.findViewById(R.id.taskadd);
        task.setId(position);
        tasks.set(position,task.getText().toString());
        task.setText(tasks.get(position));



        return view;
    }



    @Override
public long getItemId(int position) {
    return position;
}

@Override
public Object getItem(int position) {
    return tasks.get(position);
}

@Override
public int getCount() {
    return tasks.size();
}
}

}