CODEWITHSUNDEEP
androidandroid-layoutandroid-fragments
kavuru
kavuru

Reputation: 379

NullPointerException while adding view in a fragment dynamically

I am trying to dynamically add a TableLayout into a LinearLayout inside a fragment.

Code below:

public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState){
        View rootview = inflater.inflate(R.layout.dashboard_fragment, container, false);
        dash_board = (LinearLayout) rootview.findViewById(R.layout.dashboard_fragment);
        table = new TableLayout(getActivity());
        TableRow tr_header = new TableRow(getActivity());
        TextView Name = new TextView(getActivity());

        Name.setText("Name");
        LayoutParams Name_params =  new LayoutParams();
        Name_params.width= 100;

        Name.setLayoutParams(Name_params);
        Name.setPadding(2, 0, 2, 2);

        tr_header.addView(Name);

        TextView Points = new TextView(getActivity());

        Points.setText("Points");
        LayoutParams point_params =  new LayoutParams();
        point_params.width= 100;

        Points.setLayoutParams(point_params);
        Points.setPadding(2, 0, 2, 2);

        tr_header.addView(Points);

        table.addView(tr_header);

        dash_board.addView(table);

        return rootview;
    }

But while adding table to the dash board layout (dash_board.addView(table);) I am getting a NullPointerException.

What could the issue be?

Upvotes: 0

Views: 171

Answers (2)

Babak-Na
Babak-Na

Reputation: 104

Actually there is no dashboard_fragment as a ViewGroup in rootView because the rootView is exacly the dashboard_fragment as a ViewGroup.So these two lines of code are the cause of exception:

View rootview = inflater.inflate(R.layout.dashboard_fragment,container, false);

dash_board = (LinearLayout)rootview.findViewById(R.layout.dashboard_fragment);

Actually the logic will be correct if you do like this:

View rootview = inflater.inflate(R.layout.dashboard_fragment,container, false);

dash_board = (LinearLayout) rootView;

And this is the simplest form for this process:

dash_board =(LinearLayout)inflater.inflate(R.layout.dashboard_fragment,container, false);

Upvotes: 1

Ajit Pratap Singh
Ajit Pratap Singh

Reputation: 1289

Instead of this

View rootview = inflater.inflate(R.layout.dashboard_fragment, container, false);
    dash_board = (LinearLayout) rootview.findViewById(R.layout.dashboard_fragment);

it should be

LinearLayout dash_board = (LinearLayout)inflater.inflate(R.layout.dashboard_fragment,              container, false);

Upvotes: 0

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