android - cannot update listview on changing an EditText value

Question

I have an activity that retrieves data from a database that contains information (name, capital, population, flag image) for many countries. The main layout has an EditText

Answer 1

just open teh same page from your current page for the below code

enter cod  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_capital);

    private ArrayList<Country> items;
    private ArrayList<Country> items_all;

    private ArrayList<Country>  items_new;

    private EfficientAdapter adapter;
    private ListView listView;


    EditText searchInput=(EditText)findViewById(R.id.search_input_capital);

    items = new ArrayList<Country>();
    items_new = new ArrayList<Country>();
    listView = (ListView) findViewById(R.id.listView);
    listView.setDividerHeight(10);

    adapter = new EfficientAdapter(CapitalActivity.this);
    listView.setAdapter(adapter);

   setListItems("");

  searchInput.addTextChangedListener(new TextWatcher() {

           @Override
           public void afterTextChanged(Editable s) {

           }

           @Override    
           public void beforeTextChanged(CharSequence s, int start,
             int count, int after) {
           }

           @Override    
           public void onTextChanged(CharSequence s, int start,
             int before, int count) {


               String searchCapital = new String(s.toString()).trim();

             items_new.clear();

           for(Country myCountry  : items_all) {

           if( myCountry.getCapital() != null &&  
                 myCountry.getCapital().trim().toLowerCase().contains(searchCapital)) {

           items_new.add(myCountry);
             }
            }



         items.clear();

        items = (ArrayList<Country>) items_new.clone();

        if(searchCapital.trim().isEmpty()){

        items = items_all;
        }

        adapter.notifyDataSetChanged();


           }
          });

private void setListItems(String searchKey) {

items_all= DatabaseAccessor.getCountryList(CapitalActivity.this, type, typeValue, searchKey);
items=items_all;

adapter.notifyDataSetChanged();

}e here