Android - ActionBar SearchView suggestions with a simple String array

Question

I want to implement an ActionBar Search Widget with suggestions ability.
I already have a string array stored in my ORMLite database that I want to use for the suggestions.
How can I do this without creating loads of classes (Provider, Searchable...!)?

Answer 1

It's a sample, I hope it can help you.

To implements more features in this cursor, eg. open activity when press in suggestion item, take a look on this http://developer.android.com/guide/topics/search/adding-custom-suggestions.html

 package com.roberto.android.thetracker.app;

 import android.database.MatrixCursor;
 import android.os.Bundle;
 import android.provider.BaseColumns;
 import android.support.v4.app.Fragment;
 import android.support.v4.view.MenuItemCompat;
 import android.support.v4.widget.CursorAdapter;
 import android.support.v4.widget.SimpleCursorAdapter;
 import android.support.v7.widget.SearchView;
 import android.view.Menu;
 import android.view.MenuInflater;

 public class CustomSearchFragment extends Fragment {

     private static final String[] SUGGESTIONS = {
             "Bauru", "Sao Paulo", "Rio de Janeiro",
             "Bahia", "Mato Grosso", "Minas Gerais",
             "Tocantins", "Rio Grande do Sul"
     };
     private SimpleCursorAdapter mAdapter;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         final String[] from = new String[] {"cityName"};
         final int[] to = new int[] {android.R.id.text1};
         mAdapter = new SimpleCursorAdapter(getActivity(),
                 android.R.layout.simple_list_item_1,
                 null,
                 from,
                 to,
                 CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
     }

     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
         setHasOptionsMenu(true);
     }

     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         super.onCreateOptionsMenu(menu, inflater);
         inflater.inflate(R.menu.main, menu);
     }

     @Override
     public void onPrepareOptionsMenu(Menu menu) {
         super.onPrepareOptionsMenu(menu);
         final SearchView searchView = (SearchView) MenuItemCompat
                 .getActionView(menu.findItem(R.id.action_search));
         searchView.setSuggestionsAdapter(mAdapter);
         searchView.setIconifiedByDefault(false);

         // Getting selected (clicked) item suggestion
         searchView.setOnSuggestionListener(new SearchView.OnSuggestionListener() {
             @Override
             public boolean onSuggestionClick(int position) {
                 Cursor cursor = (Cursor) mAdapter.getItem(position);
                 String txt = cursor.getString(cursor.getColumnIndex("cityName"));
                 searchView.setQuery(txt, true);
                 return true;
             }

             @Override
             public boolean onSuggestionSelect(int position) {
                 // Your code here
                 return true;
             }
         });

         searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
             @Override
             public boolean onQueryTextSubmit(String s) {
                 return false;
             }

             @Override
             public boolean onQueryTextChange(String s) {
                 populateAdapter(s);
                 return false;
             }
         });
     }

     // You must implements your logic to get data using OrmLite
     private void populateAdapter(String query) {
         final MatrixCursor c = new MatrixCursor(new String[]{ BaseColumns._ID, "cityName" });
         for (int i=0; i<SUGGESTIONS.length; i++) {
             if (SUGGESTIONS[i].toLowerCase().startsWith(query.toLowerCase()))
                 c.addRow(new Object[] {i, SUGGESTIONS[i]});
         }
         mAdapter.changeCursor(c);
     }

 }

Answer 2

Base on betorcs's answer :

you don't need to have

searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {...});

you can use this, instead of that

mAdapter.setFilterQueryProvider(new FilterQueryProvider() {
    @Override
    public Cursor runQuery(CharSequence constraint) {
        return populateAdapter((String) constraint);
    }
});

and on populateAdapter, Replace "return c;" with "mAdapter.changeCursor(c);"

private Cursor populateAdapter(String query) {
    .
    .
    .
    return c;
}

Answer 3

 private String getSuggestion(int position) {
        MatrixCursor cursor = (MatrixCursor) searchView.getSuggestionsAdapter().getCursor();
        String suggest1 = cursor.getString(position);


        return SUGGESTIONS[Integer.valueOf(suggest1)];
    }