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      1 package com.example.android.leanback;
      2 
      3 import android.content.Intent;
      4 import android.os.Bundle;
      5 import android.os.Handler;
      6 import android.support.v4.app.ActivityOptionsCompat;
      7 import android.support.v17.leanback.widget.ArrayObjectAdapter;
      8 import android.support.v17.leanback.widget.HeaderItem;
      9 import android.support.v17.leanback.widget.ImageCardView;
     10 import android.support.v17.leanback.widget.ListRow;
     11 import android.support.v17.leanback.widget.ListRowPresenter;
     12 import android.support.v17.leanback.widget.ObjectAdapter;
     13 import android.support.v17.leanback.widget.OnItemViewClickedListener;
     14 import android.support.v17.leanback.widget.Presenter;
     15 import android.support.v17.leanback.widget.Row;
     16 import android.support.v17.leanback.widget.RowPresenter;
     17 import android.text.TextUtils;
     18 import android.util.Log;
     19 
     20 public class SearchFragment extends android.support.v17.leanback.app.SearchFragment
     21     implements android.support.v17.leanback.app.SearchFragment.SearchResultProvider {
     22     private static final String TAG = "leanback.SearchFragment";
     23     private static final int NUM_ROWS = 3;
     24     private static final int SEARCH_DELAY_MS = 1000;
     25 
     26     private ArrayObjectAdapter mRowsAdapter;
     27     private Handler mHandler = new Handler();
     28     private String mQuery;
     29 
     30     @Override
     31     public void onCreate(Bundle savedInstanceState) {
     32         super.onCreate(savedInstanceState);
     33 
     34         mRowsAdapter = new ArrayObjectAdapter(new ListRowPresenter());
     35 
     36         setBadgeDrawable(getActivity().getResources().getDrawable(R.drawable.ic_title));
     37         setTitle("Leanback Sample App");
     38         setSearchResultProvider(this);
     39         setOnItemViewClickedListener(new ItemViewClickedListener());
     40     }
     41 
     42     @Override
     43     public ObjectAdapter getResultsAdapter() {
     44         return mRowsAdapter;
     45     }
     46 
     47     @Override
     48     public boolean onQueryTextChange(String newQuery) {
     49         Log.i(TAG, String.format("Search Query Text Change %s", newQuery));
     50         mRowsAdapter.clear();
     51         loadQuery(newQuery);
     52         return true;
     53     }
     54 
     55     @Override
     56     public boolean onQueryTextSubmit(String query) {
     57         Log.i(TAG, String.format("Search Query Text Submit %s", query));
     58         mRowsAdapter.clear();
     59         loadQuery(query);
     60         return true;
     61     }
     62 
     63     private void loadQuery(String query) {
     64         mQuery = query;
     65         mHandler.removeCallbacks(mDelayedLoad);
     66         if (!TextUtils.isEmpty(query) && !query.equals("nil")) {
     67             mHandler.postDelayed(mDelayedLoad, SEARCH_DELAY_MS);
     68         }
     69     }
     70 
     71     private void loadRows() {
     72         for (int i = 0; i < NUM_ROWS; ++i) {
     73             ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(new CardPresenter());
     74             listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_1));
     75             listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_2));
     76             HeaderItem header = new HeaderItem(i, mQuery + " results row " + i);
     77             mRowsAdapter.add(new ListRow(header, listRowAdapter));
     78         }
     79     }
     80 
     81     private Runnable mDelayedLoad = new Runnable() {
     82         @Override
     83         public void run() {
     84             loadRows();
     85         }
     86     };
     87 
     88     private final class ItemViewClickedListener implements OnItemViewClickedListener {
     89         @Override
     90         public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
     91                 RowPresenter.ViewHolder rowViewHolder, Row row) {
     92             Intent intent = new Intent(getActivity(), DetailsActivity.class);
     93             intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
     94 
     95             Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
     96                     getActivity(),
     97                     ((ImageCardView)itemViewHolder.view).getMainImageView(),
     98                     DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
     99             getActivity().startActivity(intent, bundle);
    100         }
    101     }
    102 }
    103