How to remove listview all items

Question

In my app, if you click on a button then i want to remove all the listview items. Here, i am using the base adapter for adding the items to the list view.

How can i

Answer 1

if you used List object and passed to the adapter you can remove the value from the List object and than call the notifyDataSetChanged() using adapter object.

for e.g.

List<String> list = new ArrayList<String>();
ArrayAdapter adapter;


adapter = new ArrayAdapter<String>(DeleteManyTask.this, 
            android.R.layout.simple_list_item_1,
            (String[])list.toArray(new String[0]));

listview = (ListView) findViewById(R.id.list);
listview.setAdapter(adapter);

listview.setAdapter(listAdapter);

for remove do this way

list.remove(index); //or
list.clear();
adpater.notifyDataSetChanged();

or without list object remove item from list.

adapter.clear();
adpater.notifyDataSetChanged();

Answer 2

You can only use

 lv.setAdapter(null);

Answer 3

I used this statement and it worked for me:

   setListAdapter(null)

This one calls a default constructor that does nothing in a class extends BaseAdapter.

Answer 4

use any one of the bellow options which suites your requirement

listview.removeViews(1,listview.getChildCount());

or

listview.removeViewInLayout(your view);

Answer 5

An other approach after trying the solutions below. When you need it clear, just initialise your list to new clear new list.

List<ModelData> dataLists = new ArrayList<>();
                RaporAdapter adapter = new RaporAdapter(AyrintiliRapor.this, dataLists);
                listview.setAdapter(adapter);

Or set visibility to Gone / Invisible up to need

img_pdf.setVisibility(View.INVISIBLE);