BrowseFragment.java revision a91086bb15b43b8b9184d3bc41dc8828d962cfef 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14package com.example.android.leanback;
15
16import android.app.Fragment;
17import android.content.Intent;
18import android.os.Bundle;
19import android.os.Handler;
20import android.support.v17.leanback.app.Adaptable;
21import android.support.v17.leanback.app.GuidedStepFragment;
22import android.support.v17.leanback.app.RowsFragment;
23import android.support.v17.leanback.widget.ArrayObjectAdapter;
24import android.support.v17.leanback.widget.HeaderItem;
25import android.support.v17.leanback.widget.ImageCardView;
26import android.support.v17.leanback.widget.ListRow;
27import android.support.v17.leanback.widget.ListRowPresenter;
28import android.support.v17.leanback.widget.OnItemViewClickedListener;
29import android.support.v17.leanback.widget.OnItemViewSelectedListener;
30import android.support.v17.leanback.widget.PageRow;
31import android.support.v17.leanback.widget.PageRowPresenter;
32import android.support.v17.leanback.widget.Presenter;
33import android.support.v17.leanback.widget.PresenterSelector;
34import android.support.v17.leanback.widget.Row;
35import android.support.v17.leanback.widget.RowPresenter;
36import android.support.v4.app.ActivityOptionsCompat;
37import android.util.Log;
38import android.view.LayoutInflater;
39import android.view.View;
40import android.view.ViewGroup;
41
42public class BrowseFragment extends android.support.v17.leanback.app.BrowseFragment {
43    private static final String TAG = "leanback.BrowseFragment";
44
45    private static final boolean TEST_ENTRANCE_TRANSITION = true;
46    private static final int NUM_ROWS = 8;
47    private static final long HEADER_ID1 = 1001;
48    private static final long HEADER_ID2 = 1002;
49
50    private ArrayObjectAdapter mRowsAdapter;
51    private BackgroundHelper mBackgroundHelper = new BackgroundHelper();
52
53    // For good performance, it's important to use a single instance of
54    // a card presenter for all rows using that presenter.
55    final CardPresenter mCardPresenter = new CardPresenter();
56    final CardPresenter mCardPresenter2 = new CardPresenter(R.style.MyImageCardViewTheme);
57
58    public BrowseFragment() {
59        getMainFragmentRegistry().registerFragment(PageRow.class, new PageRowFragmentFactory());
60    }
61
62    @Override
63    public void onCreate(Bundle savedInstanceState) {
64        Log.i(TAG, "onCreate");
65        super.onCreate(savedInstanceState);
66
67        setBadgeDrawable(getActivity().getResources().getDrawable(R.drawable.ic_title));
68        setTitle("Leanback Sample App");
69        setHeadersState(HEADERS_ENABLED);
70        setupRows();
71        setOnSearchClickedListener(new View.OnClickListener() {
72            @Override
73            public void onClick(View view) {
74                Intent intent = new Intent(getActivity(), SearchActivity.class);
75                startActivity(intent);
76            }
77        });
78
79        setOnItemViewClickedListener(new ItemViewClickedListener());
80        setOnItemViewSelectedListener(new OnItemViewSelectedListener() {
81            @Override
82            public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item,
83                    RowPresenter.ViewHolder rowViewHolder, Row row) {
84                Log.i(TAG, "onItemSelected: " + item + " row " + row);
85
86                if (isShowingHeaders()) {
87                    mBackgroundHelper.setBackground(getActivity(), null);
88                } else if (item instanceof PhotoItem) {
89                    mBackgroundHelper.setBackground(
90                            getActivity(), ((PhotoItem) item).getImageResourceId());
91                }
92            }
93        });
94        if (TEST_ENTRANCE_TRANSITION) {
95            // don't run entrance transition if fragment is restored.
96            if (savedInstanceState == null) {
97                prepareEntranceTransition();
98            }
99        }
100
101        // simulates in a real world use case  data being loaded two seconds later
102        new Handler().postDelayed(new Runnable() {
103            public void run() {
104                loadData();
105                startEntranceTransition();
106            }
107        }, 2000);
108    }
109
110    @Override
111    public View onCreateView(
112            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
113        return super.onCreateView(inflater, container, savedInstanceState);
114    }
115
116    private void setupRows() {
117        mRowsAdapter = new ArrayObjectAdapter(new MyPresenterSelector());
118        setAdapter(mRowsAdapter);
119    }
120
121    private void loadData() {
122        int i = 0;
123
124        HeaderItem header = new HeaderItem(HEADER_ID1, "Page Row " + 0);
125        mRowsAdapter.add(new PageRow(header));
126
127        for (; i < NUM_ROWS; ++i) {
128            header = new HeaderItem(i, "Row " + i);
129            mRowsAdapter.add(new ListRow(header, createListRowAdapter(i)));
130        }
131
132        header = new HeaderItem(HEADER_ID2, "Page Row " + 1);
133        mRowsAdapter.add(new PageRow(header));
134    }
135
136    private ArrayObjectAdapter createListRowAdapter(int i) {
137        ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter((i & 1) == 0 ?
138                mCardPresenter : mCardPresenter2);
139        listRowAdapter.add(new PhotoItem(
140                "Hello world",
141                R.drawable.gallery_photo_1));
142        listRowAdapter.add(new PhotoItem(
143                "This is a test",
144                "Only a test",
145                R.drawable.gallery_photo_2));
146        listRowAdapter.add(new PhotoItem(
147                "Android TV",
148                "by Google",
149                R.drawable.gallery_photo_3));
150        listRowAdapter.add(new PhotoItem(
151                "Leanback",
152                R.drawable.gallery_photo_4));
153        listRowAdapter.add(new PhotoItem(
154                "GuidedStep (Slide left/right)",
155                R.drawable.gallery_photo_5));
156        listRowAdapter.add(new PhotoItem(
157                "GuidedStep (Slide bottom up)",
158                "Open GuidedStepFragment",
159                R.drawable.gallery_photo_6));
160        listRowAdapter.add(new PhotoItem(
161                "Android TV",
162                "open RowsActivity",
163                R.drawable.gallery_photo_7));
164        listRowAdapter.add(new PhotoItem(
165                "Leanback",
166                "open BrowseActivity",
167                R.drawable.gallery_photo_8));
168        return listRowAdapter;
169    }
170
171    private final class ItemViewClickedListener implements OnItemViewClickedListener {
172        @Override
173        public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
174                RowPresenter.ViewHolder rowViewHolder, Row row) {
175
176            Intent intent;
177            Bundle bundle;
178            if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_6) {
179                GuidedStepFragment.add(getFragmentManager(),
180                        new GuidedStepHalfScreenActivity.FirstStepFragment(),
181                        R.id.lb_guidedstep_host);
182                return;
183            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_5) {
184                GuidedStepFragment.add(getFragmentManager(),
185                        new GuidedStepActivity.FirstStepFragment(), R.id.lb_guidedstep_host);
186                return;
187            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_8) {
188                intent = new Intent(getActivity(), BrowseActivity.class);
189                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
190                        .toBundle();
191            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_7) {
192                intent = new Intent(getActivity(), RowsActivity.class);
193                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
194                        .toBundle();
195            } else {
196                intent = new Intent(getActivity(), DetailsActivity.class);
197                intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
198                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
199                        getActivity(),
200                        ((ImageCardView) itemViewHolder.view).getMainImageView(),
201                        DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
202            }
203            getActivity().startActivity(intent, bundle);
204        }
205    }
206
207    public static class PageRowFragmentFactory extends FragmentFactory {
208
209        @Override
210        public Fragment createFragment(Object rowObj) {
211            Row row = (Row) rowObj;
212            if (row.getHeaderItem().getId() == HEADER_ID1) {
213                return new SampleFragment();
214            } else if (row.getHeaderItem().getId() == HEADER_ID2) {
215                return new SampleRowsFragment();
216            }
217
218            return null;
219        }
220    }
221
222    public static class PageFragmentAdapterImpl extends MainFragmentAdapter<SampleFragment> {
223
224        public PageFragmentAdapterImpl(SampleFragment fragment) {
225            super(fragment);
226            setScalingEnabled(true);
227        }
228
229        @Override
230        public void setEntranceTransitionState(boolean state) {
231            getFragment().setEntranceTransitionState(state);
232        }
233    }
234
235    public static class SampleRowsFragment extends RowsFragment {
236        final CardPresenter mCardPresenter = new CardPresenter();
237        final CardPresenter mCardPresenter2 = new CardPresenter(R.style.MyImageCardViewTheme);
238
239        public SampleRowsFragment() {
240            ArrayObjectAdapter adapter = new ArrayObjectAdapter(new ListRowPresenter());
241            for (int i = 0; i < 4; i++) {
242                ListRow row = new ListRow(new HeaderItem("Row " + i), createListRowAdapter(i));
243                adapter.add(row);
244            }
245            setAdapter(adapter);
246
247            setOnItemViewClickedListener(new OnItemViewClickedListener() {
248                @Override
249                public void onItemClicked(
250                        Presenter.ViewHolder itemViewHolder,
251                        Object item,
252                        RowPresenter.ViewHolder rowViewHolder, Row row) {
253                    Intent intent = new Intent(
254                            itemViewHolder.view.getContext(), GuidedStepActivity.class);
255                    startActivity(intent);
256                }
257            });
258        }
259
260        private ArrayObjectAdapter createListRowAdapter(int i) {
261            ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter((i & 1) == 0 ?
262                    mCardPresenter : mCardPresenter2);
263            listRowAdapter.add(new PhotoItem(
264                    "Hello world",
265                    R.drawable.gallery_photo_1));
266            listRowAdapter.add(new PhotoItem(
267                    "This is a test",
268                    "Only a test",
269                    R.drawable.gallery_photo_2));
270            listRowAdapter.add(new PhotoItem(
271                    "Android TV",
272                    "by Google",
273                    R.drawable.gallery_photo_3));
274            listRowAdapter.add(new PhotoItem(
275                    "Leanback",
276                    R.drawable.gallery_photo_4));
277            listRowAdapter.add(new PhotoItem(
278                    "GuidedStep (Slide left/right)",
279                    R.drawable.gallery_photo_5));
280            listRowAdapter.add(new PhotoItem(
281                    "GuidedStep (Slide bottom up)",
282                    "Open GuidedStepFragment",
283                    R.drawable.gallery_photo_6));
284            listRowAdapter.add(new PhotoItem(
285                    "Android TV",
286                    "open RowsActivity",
287                    R.drawable.gallery_photo_7));
288            listRowAdapter.add(new PhotoItem(
289                    "Leanback",
290                    "open BrowseActivity",
291                    R.drawable.gallery_photo_8));
292            return listRowAdapter;
293        }
294    }
295
296    public static class SampleFragment extends Fragment implements Adaptable {
297
298        final PageFragmentAdapterImpl mMainFragmentAdapter = new PageFragmentAdapterImpl(this);
299
300        boolean mEntranceTransitionState = true;
301
302        public void setEntranceTransitionState(boolean state) {
303            mEntranceTransitionState = state;
304            final View view = getView();
305            if (view == null) {
306                return;
307            }
308            int visibility = state ? View.VISIBLE : View.INVISIBLE;
309            view.findViewById(R.id.tv1).setVisibility(visibility);
310            view.findViewById(R.id.tv2).setVisibility(visibility);
311            view.findViewById(R.id.tv3).setVisibility(visibility);
312        }
313
314        @Override
315        public View onCreateView(
316                final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
317            View view = inflater.inflate(R.layout.page_fragment, container, false);
318            view.findViewById(R.id.tv1).setOnClickListener(new View.OnClickListener() {
319                @Override
320                public void onClick(View view) {
321                    Intent intent = new Intent(inflater.getContext(), GuidedStepActivity.class);
322                    startActivity(intent);
323                }
324            });
325
326            return view;
327        }
328
329        @Override
330        public void onStart() {
331            super.onStart();
332            mMainFragmentAdapter.getFragmentHost().notifyViewCreated(mMainFragmentAdapter);
333        }
334
335        @Override
336        public void onViewCreated(View view, Bundle savedInstanceState) {
337            setEntranceTransitionState(mEntranceTransitionState);
338        }
339
340        @Override
341        public PageFragmentAdapterImpl getAdapter(Class clazz) {
342            if (clazz == MainFragmentAdapter.class) {
343                return mMainFragmentAdapter;
344            }
345            return null;
346        }
347    }
348
349    private static class MyPresenterSelector extends PresenterSelector {
350        private Presenter[] presenters = {
351                new ListRowPresenter(),
352                new PageRowPresenter()
353        };
354
355        @Override
356        public Presenter getPresenter(Object item) {
357            if (item instanceof PageRow) {
358                return presenters[1];
359            }
360            return presenters[0];
361        }
362
363        @Override
364        public Presenter[] getPresenters() {
365            return presenters;
366        }
367    }
368}
369
370