java - Error when set an ImageAdapter in Inflate Layout? -

i trying make gridview on layoutinflater, when test app, crashes. here code :

public class level1 extends fragment { public static fragment newinstance(context context) { level1 f = new level1();     return f; }    public view oncreateview(layoutinflater inflater, viewgroup container,bundle savedinstancestate) { viewgroup root = (viewgroup) inflater.inflate(r.layout.grid_layout, null);   gridview gridview = (gridview) root.findviewbyid(r.id.grid_view);  gridview.setadapter(new imageadapter(root.getcontext())); } 

i think, problem in "setadapter". can't use context "xxx.this". i've try change setadapter context "getcontext" , "getapplicationcontext" still crashes. when delete "setadapter" app working without gridview.

my imageadapter :

public class imageadapter extends baseadapter { private context mcontext;  public integer[] mthumbids = {         r.drawable.pic_1, r.drawable.pic_2,         r.drawable.pic_3, r.drawable.pic_4,         r.drawable.pic_5, r.drawable.pic_6,         r.drawable.pic_7, r.drawable.pic_8,         r.drawable.pic_9, r.drawable.pic_10,         r.drawable.pic_11, r.drawable.pic_12,         r.drawable.pic_13, r.drawable.pic_14,         r.drawable.pic_15 };  // constructor public imageadapter(context c){     mcontext = c; }  @override public int getcount() {     return mthumbids.length; }  @override public object getitem(int position) {     return mthumbids[position]; }  @override public long getitemid(int position) {     return 0; }  @override public view getview(int position, view convertview, viewgroup parent) {              imageview imageview = new imageview(mcontext);     imageview.setimageresource(mthumbids[position]);     imageview.setscaletype(imageview.scaletype.center_crop);     imageview.setlayoutparams(new gridview.layoutparams(70, 70));     return imageview; }      } 

please me..

please set breakpoint on line gridview gridview = (gridview) root.findviewbyid(r.id.grid_view); , start debugging app (in eclipse it's button on left side of button use start application). when breakpoint reached please step on 1 step , see if gridview null. me looks reasonable source of error. without detailled error message it's hard say, please update post.