Change Height of a Listview dynamicallyAndroid

Question

The format of my XML file is as following:

 LinearLayout 

     ScrollView

         RelativeLayout

             LinearLayout

             

        

Answer 1

this class can be use to expand the height of listview or gridview at runtime ,please put it in your package and use by passing listview

public class CustomView {

        public static void getListViewSize(ListView myListView) {
            ListAdapter myListAdapter = myListView.getAdapter();
            if (myListAdapter == null) {
                //do nothing return null
                return;
            }
            //set listAdapter in loop for getting final size
            int totalHeight = 0;
            for (int size = 0; size < myListAdapter.getCount(); size++) {
                View listItem = myListAdapter.getView(size, null, myListView);
                listItem.measure(0, 0);
                totalHeight += listItem.getMeasuredHeight();
            }
            //setting listview item in adapter
            ViewGroup.LayoutParams params = myListView.getLayoutParams();
            params.height = totalHeight + (myListView.getDividerHeight() * (myListAdapter.getCount() - 1));
            myListView.setLayoutParams(params);
            // print height of adapter on log
            Log.i("height of listItem:", String.valueOf(totalHeight));
        }



        public static void getGridViewSize(GridView myGridView) {
            ListAdapter myListAdapter = myGridView.getAdapter();
            if (myListAdapter == null) {
                //do nothing return null
                return;
            }
            //set listAdapter in loop for getting final size
            int totalHeight = 0;
            int maxHeight = 0;//implement new 
            for (int size = 0; size < myListAdapter.getCount(); size++) {
                View listItem = myListAdapter.getView(size, null, myGridView);

                listItem.measure(0, 0);

                totalHeight += listItem.getMeasuredHeight()+8;

                if(maxHeight < listItem.getMeasuredHeight()){//implement new 

                    maxHeight = listItem.getMeasuredHeight()+8;
                    System.out.println(" max height of gridview item<11>  "+size+"  ==  "+maxHeight);
                }

                System.out.println(myListAdapter.getCount()+"  height of gridview item<22>  "+size+"  ==  "+listItem.getMeasuredHeight());
            }

            //setting listview item in adapter
             ViewGroup.LayoutParams params = myGridView.getLayoutParams();

            if(myListAdapter.getCount() > 1)
                params.height = maxHeight * ((myListAdapter.getCount()+1)/2);//implement new
            else
                params.height = maxHeight;//implement new

             myGridView.setLayoutParams(params);

        }


    }