android - Dynamic Grid View as Array -

hey guys building app show data grid view , grid view may multiple depend on web service data using dynamic grid view objects array when initializing grid view objects.. showing me compile time error(null pointer exception) 1 have answer 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()); 

you have not initialized , specified size of array.

you should follow these steps:

1. get size of response of webservice data, i.e. how many gridviews shown/filled.

   jsonarray arrayfromwebservice = new jsonarray(webserviceresponse); int size_of_grid = arrayfromwebservice.length; 

2. now, initialize grid array size_of_grid variable.

   gv = new gridview[size_of_grid]; // work array.