Android ListView highly dynamic access

 

today about how to obtain a dynamic listview height. Look at the code:

 

;

 

  

public static void setListViewHeightBasedOnChildren(ListView listView) { 
        ListAdapter listAdapter = listView.getAdapter(); 
        if (listAdapter == null) { 
            // pre-condition 
            return; 
        } 
 
        int totalHeight = 0; 
        for (int i = 0; i < listAdapter.getCount(); i++) { 
            View listItem = listAdapter.getView(i, null, listView); 
            // listItem.measure(0, 0); 
            listItem.measure( 
                    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
                    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); 
            totalHeight += listItem.getMeasuredHeight(); 
        } 
 
        ViewGroup.LayoutParams params = listView.getLayoutParams(); 
        params.height = totalHeight 
                + (listView.getDividerHeight() * (listAdapter.getCount() - 1)); 
        listView.setLayoutParams(params); 
    }

 

 

 

Use this code to get listview height, you need to pay attention to several issues:

 

1, listview the item's root layout must be a LinearLayout;

 

2, calling this method requires the data loaded in the adapter after the update; codes are as follows:

 

mAdapter.notifyDataSetChanged (); ; Function.getTotalHeightofListView (mListView);

 

3, get item highly commented code can also be used, the effect is the same.