Android GridView implements merged cell effects

Package com.example.test;import android.app.activity;import android.content.context;import  android.graphics.Color;import android.os.Bundle;import android.view.Gravity;import  android.view.view;import android.view.viewgroup;import android.widget.abslistview;import  Android.widget.baseadapter;import android.widget.gridview;import android.widget.linearlayout;import  android.widget.textview;public class mainactivity extends activity {private  static GridView mGridView; @Overrideprotected  void oncreate (bundle  savedinstancestate)  {super.oncreate (savedinstancestate); Mgridview = new gridview ( Getapplicationcontext ()); Madapter adapter = new madapter (Mgridview.getcontext (),  new string[]{"Hello 1", "Hello 2" , "Hello 3", "Hello 4", "Hello 5", "Hello 6", "Hello 7", "Hello 8", "Hello 9", "Hello 10", "Hello 11", "Hello 12", "Hello 13", "Hello 14", "Hello 15", "Hello 16", "Hello 17", "Hello 18", " Hello 19 "," Hello 20 "," Hello 21 "," Hello 22 "," Hello 23"Hello 24", "Hello 25", "Hello 26", "Hello 27", "Hello 28", "Hello 29", "Hello 30"}); Linearlayout headlayout = new linearlayout (Getapplicationcontext ()); Linearlayout.layoutparams params = new linearlayout.layoutparams ( linearlayout.layoutparams.fill_parent, 300); Headlayout.setlayoutparams (params); Headlayout.setbackgroundcolor (color.red); Mgridview.setadapter (adapter); Mgridview.setnumcolumns (2); Setcontentview (Mgridview);} static class madapter extends baseadapter{private string[] items;private  Context context;public madapter (Context context, string[] items)  {this.items  = items;this.context = context;} @Overridepublic  int getcount ()  {return items.length;} @Overridepublic  object getitem (int position)  {return position;} @Overridepublic  long getitemid (int position)  {return position;} @Overridepublic  int getitemviewtype (int position)  {return super.getitemviewtype (position);} @Overridepublic  view getview (int position, view convertview, viewgroup  Parent)  {TextView textView = null;if  (position %4 == 0)  {textview  = new mytext (context); Abslistview.layoutparams params = new abslistview.layoutparams ( ABSLISTVIEW.LAYOUTPARAMS.FILL_PARENT, 100); Textview.setlayoutparams (params); Textview.settextcolor ( Textview.settextsize (Color.Black); Textview.settext (Items[position]); Textview.setbackgroundcolor (0x88FF0000 ); textview.setgravity (gravity.left | gravity.center_vertical);}  else {textview = new textview (context); Abslistview.layoutparams params = new abslistview.layoutparams ( abslistview.layoutparams.fill_parent, 200); Textview.setlayoutparams (params); Textview.settextcolor ( Color.Black); textview.settextsize, Textview.settext (itemS[position]); Textview.setvisibility (view.visible);if  (position %4 == 1)  {//  The row height of the GridView is determined by the height of the last element of the row abslistview.layoutparams params2 = new abslistview.layoutparams ( ABSLISTVIEW.LAYOUTPARAMS.FILL_PARENT, 100); Textview.setlayoutparams (PARAMS2); Textview.setvisibility ( view.invisible);} Textview.setgravity (Gravity.center);} Return textview;} Class mytext extends textview {public mytext (Context context)  {super ( context);} @Overrideprotected  void onmeasure (Int widthmeasurespec, int heightmeasurespec)  { Super.onmeasure (Widthmeasurespec, heightmeasurespec);int targetwidth =  Mgridview.getmeasuredwidth ()                      - mgridview.getpaddingleft ()                      - mgridview.getpaddingright ();             widthmeasurespec = measurespec.makemeasurespec (targetwidth,                      Measurespec.getmode (WIDTHMEASURESPEC));             super.onmeasure (Widthmeasurespec, heightmeasurespec);}}}