SearchFragment.java revision 27cab4ef89f8f6081fe66e9302236befd6842a8f 
1package com.example.android.leanback;
2
3import android.content.Intent;
4import android.os.Bundle;
5import android.os.Handler;
6import android.support.v17.leanback.widget.ArrayObjectAdapter;
7import android.support.v17.leanback.widget.HeaderItem;
8import android.support.v17.leanback.widget.ListRow;
9import android.support.v17.leanback.widget.ListRowPresenter;
10import android.support.v17.leanback.widget.ObjectAdapter;
11import android.support.v17.leanback.widget.OnItemClickedListener;
12import android.support.v17.leanback.widget.Row;
13import android.text.TextUtils;
14import android.util.Log;
15
16public class SearchFragment extends android.support.v17.leanback.app.SearchFragment
17    implements android.support.v17.leanback.app.SearchFragment.SearchResultProvider {
18    private static final String TAG = "leanback.SearchFragment";
19    private static final int NUM_ROWS = 3;
20    private static final int SEARCH_DELAY_MS = 1000;
21
22    private ArrayObjectAdapter mRowsAdapter;
23    private Handler mHandler = new Handler();
24    private String mQuery;
25
26    @Override
27    public void onCreate(Bundle savedInstanceState) {
28        super.onCreate(savedInstanceState);
29
30        mRowsAdapter = new ArrayObjectAdapter(new ListRowPresenter());
31
32        setBadgeDrawable(getActivity().getResources().getDrawable(R.drawable.ic_title));
33        setTitle("Leanback Sample App");
34        setSearchResultProvider(this);
35        setOnItemClickedListener(new ItemClickedListener());
36    }
37
38    @Override
39    public ObjectAdapter getResultsAdapter() {
40        return mRowsAdapter;
41    }
42
43    @Override
44    public boolean onQueryTextChange(String newQuery) {
45        Log.i(TAG, String.format("Search Query Text Change %s", newQuery));
46        mRowsAdapter.clear();
47        loadQuery(newQuery);
48        return true;
49    }
50
51    @Override
52    public boolean onQueryTextSubmit(String query) {
53        Log.i(TAG, String.format("Search Query Text Submit %s", query));
54        mRowsAdapter.clear();
55        loadQuery(query);
56        return true;
57    }
58
59    private void loadQuery(String query) {
60        mQuery = query;
61        mHandler.removeCallbacks(mDelayedLoad);
62        if (!TextUtils.isEmpty(query) && !query.equals("nil")) {
63            mHandler.postDelayed(mDelayedLoad, SEARCH_DELAY_MS);
64        }
65    }
66
67    private void loadRows() {
68        for (int i = 0; i < NUM_ROWS; ++i) {
69            ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(new StringPresenter());
70            listRowAdapter.add("Hello world");
71            listRowAdapter.add("This is a test");
72            HeaderItem header = new HeaderItem(i, mQuery + " results row " + i, null);
73            mRowsAdapter.add(new ListRow(header, listRowAdapter));
74        }
75    }
76
77    private Runnable mDelayedLoad = new Runnable() {
78        @Override
79        public void run() {
80            loadRows();
81        }
82    };
83    private final class ItemClickedListener implements OnItemClickedListener {
84        public void onItemClicked(Object item, Row row) {
85            // TODO: use a fragment transaction instead of launching a new
86            // activity
87            Intent intent = new Intent(getActivity(), DetailsActivity.class);
88            startActivity(intent);
89        }
90    }
91}
92