CODEWITHSUNDEEP
androidgridview
user3839710
user3839710

Reputation: 125

Dynamic Grid View as Array

Hey guys I am building an app to show data as grid View and Grid View may be multiple its depend on Web Service data so I am using Dynamic Grid View objects As array but When I am initializing Grid View objects.. it is showing me compile time error(NULL Pointer Exception) any one have answer for this question.

public class FoodLevelPageOne extends Activity {
private Button home;
private Button back;
private LinearLayout linearLayout;
private HttpResponse httpResponse;
.....
...
private ArrayList<JsonData> al1[];
private GridView gv[];
....
....
....
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);`
    ...
    ...
    gv[i] = new GridView(getApplicationContext());

Upvotes: 2

Views: 137

Answers (2)

Nadeem Iqbal
Nadeem Iqbal

Reputation: 2338

You have not initialized and specified the size of the array.

You should follow these steps:

  1. Get the size of the response of the webservice data, i.e. How many gridviews to be shown/filled.

    JSONArray arrayFromWebservice = new JSONArray(webServiceResponse);
int SIZE_OF_GRID = arrayFromWebservice.length;

  2. Now, initialize the grid array with the SIZE_OF_GRID variable.

    gv = new GridView[SIZE_OF_GRID];
// do some work with the array.

Upvotes: 1

Prashant Jajal
Prashant Jajal

Reputation: 3627

From your code, I think that you should miss to initialize array of grid view..

private GridView gv[] = new GridView[CONTSTANT_NUMBER];

or:

You must be use collection framework Arraylist<GridView> object to generate dynamic list.

Upvotes: 0

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