Hi i am currently working on an android application in it has list view inside the main activity. What i want is disable the scrolling of list and allow the whole page to scroll only,is there any way for that please do help..... I tried with below methods but throwing "java.lang.NullPointerException: i'm using this in Android studio IDE

Method 1 used by me ::

ViewGroup.LayoutParams listViewParams = (ViewGroup.LayoutParams)listView.getLayoutParams();
         listViewParams.height = 400 + (listView.getDividerHeight()* (listView.getCount() - 1));
int height = 0;
for (int i = 0; i < listView.getChildCount(); i++) {
 height += listView.getChildAt(i).getMeasuredHeight();
  height += listView.getDividerHeight();
    }
Log.w("Height",""+ listView.getHeight()+ height);
listViewParams.height = listView.getHeight()+ height;
  listView.requestLayout();

Exception trowing :

ava.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportantForAccessibility()' on a null object reference

Method 2 used by me :

ListAdapter myListAdapter = myListView.getAdapter();if (myListAdapter == null) {    //do nothing return null    return;
}
//set listAdapter in loop for getting final sizeint 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 adapterViewGroup.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));

Exception trowing :

'void android.view.View.measure(int, int)' on a null object reference