Android - ActionBar SearchView suggestions with a

问题:

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

回答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);
        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) {
                // Your code here
                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);
    }

}

回答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;
}

回答3:

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


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