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.util.Log;
21import android.view.LayoutInflater;
22import android.view.View;
23import android.view.ViewGroup;
24
25import androidx.core.app.ActivityOptionsCompat;
26import androidx.core.content.res.ResourcesCompat;
27import androidx.leanback.app.GuidedStepFragment;
28import androidx.leanback.app.RowsFragment;
29import androidx.leanback.widget.ArrayObjectAdapter;
30import androidx.leanback.widget.DividerRow;
31import androidx.leanback.widget.HeaderItem;
32import androidx.leanback.widget.ImageCardView;
33import androidx.leanback.widget.ListRow;
34import androidx.leanback.widget.ListRowPresenter;
35import androidx.leanback.widget.OnItemViewClickedListener;
36import androidx.leanback.widget.OnItemViewSelectedListener;
37import androidx.leanback.widget.PageRow;
38import androidx.leanback.widget.Presenter;
39import androidx.leanback.widget.Row;
40import androidx.leanback.widget.RowPresenter;
41import androidx.leanback.widget.SectionRow;
42
43public class BrowseFragment extends androidx.leanback.app.BrowseFragment {
44    private static final String TAG = "leanback.BrowseFragment";
45
46    private static final boolean TEST_ENTRANCE_TRANSITION = true;
47    private static final int NUM_ROWS = 8;
48    private static final long HEADER_ID1 = 1001;
49    private static final long HEADER_ID2 = 1002;
50    private static final long HEADER_ID3 = 1003;
51
52    private ArrayObjectAdapter mRowsAdapter;
53    private BackgroundHelper mBackgroundHelper;
54
55    // For good performance, it's important to use a single instance of
56    // a card presenter for all rows using that presenter.
57    final CardPresenter mCardPresenter = new CardPresenter();
58    final CardPresenter mCardPresenter2 = new CardPresenter(R.style.MyImageCardViewTheme);
59
60    public BrowseFragment() {
61        getMainFragmentRegistry().registerFragment(PageRow.class, new PageRowFragmentFactory());
62    }
63
64    @Override
65    public void onCreate(Bundle savedInstanceState) {
66        Log.i(TAG, "onCreate");
67        super.onCreate(savedInstanceState);
68
69        mBackgroundHelper = new BackgroundHelper(getActivity());
70        mBackgroundHelper.attachToWindow();
71
72        setBadgeDrawable(ResourcesCompat.getDrawable(getActivity().getResources(),
73                R.drawable.ic_title, getActivity().getTheme()));
74        setTitle("Leanback Sample App");
75        setHeadersState(HEADERS_ENABLED);
76        setOnSearchClickedListener(new View.OnClickListener() {
77            @Override
78            public void onClick(View view) {
79                Intent intent = new Intent(getActivity(), SearchActivity.class);
80                startActivity(intent);
81            }
82        });
83
84        setOnItemViewClickedListener(new ItemViewClickedListener());
85        setOnItemViewSelectedListener(new OnItemViewSelectedListener() {
86            @Override
87            public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item,
88                    RowPresenter.ViewHolder rowViewHolder, Row row) {
89                Log.i(TAG, "onItemSelected: " + item + " row " + row);
90
91                updateBackgroundToSelection();
92            }
93        });
94        setBrowseTransitionListener(new BrowseTransitionListener() {
95            @Override
96            public void onHeadersTransitionStop(boolean withHeaders) {
97                updateBackgroundToSelection();
98            }
99        });
100        if (TEST_ENTRANCE_TRANSITION) {
101            // don't run entrance transition if fragment is restored.
102            if (savedInstanceState == null) {
103                prepareEntranceTransition();
104            }
105        }
106
107        // simulates in a real world use case  data being loaded two seconds later
108        new Handler().postDelayed(new Runnable() {
109            @Override
110            public void run() {
111                setupRows();
112                loadData();
113                startEntranceTransition();
114            }
115        }, 2000);
116    }
117
118    @Override
119    public void onStart() {
120        super.onStart();
121        updateBackgroundToSelection();
122    }
123
124    void updateBackgroundToSelection() {
125        if (!isShowingHeaders()) {
126            RowPresenter.ViewHolder rowViewHolder = getSelectedRowViewHolder();
127            Object item = rowViewHolder == null ? null : rowViewHolder.getSelectedItem();
128            if (item != null) {
129                mBackgroundHelper.setBackground(((PhotoItem) item).getImageResourceId());
130            } else {
131                mBackgroundHelper.clearDrawable();
132            }
133        } else {
134            mBackgroundHelper.clearDrawable();
135        }
136    }
137
138    @Override
139    public View onCreateView(
140            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
141        return super.onCreateView(inflater, container, savedInstanceState);
142    }
143
144    private void setupRows() {
145        ListRowPresenter listRowPresenter = new ListRowPresenter();
146        listRowPresenter.setNumRows(1);
147        mRowsAdapter = new ArrayObjectAdapter(listRowPresenter);
148    }
149
150    private void loadData() {
151        int i = 0;
152
153        mRowsAdapter.add(new PageRow(new HeaderItem(HEADER_ID1, "Page Row 0")));
154        mRowsAdapter.add(new DividerRow());
155
156        mRowsAdapter.add(new SectionRow(new HeaderItem("section 0")));
157        for (; i < NUM_ROWS; ++i) {
158            HeaderItem headerItem = new HeaderItem(i, "Row " + i);
159            headerItem.setDescription("Description for Row "+i);
160            mRowsAdapter.add(new ListRow(headerItem, createListRowAdapter(i)));
161        }
162
163        mRowsAdapter.add(new DividerRow());
164        mRowsAdapter.add(new PageRow(new HeaderItem(HEADER_ID2, "Page Row 1")));
165
166        mRowsAdapter.add(new PageRow(new HeaderItem(HEADER_ID3, "Page Row 2")));
167        setAdapter(mRowsAdapter);
168    }
169
170    private ArrayObjectAdapter createListRowAdapter(int i) {
171        ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter((i & 1) == 0 ?
172                mCardPresenter : mCardPresenter2);
173        listRowAdapter.add(new PhotoItem(
174                "Hello world",
175                R.drawable.gallery_photo_1));
176        listRowAdapter.add(new PhotoItem(
177                "This is a test",
178                "Only a test",
179                R.drawable.gallery_photo_2));
180        listRowAdapter.add(new PhotoItem(
181                "Android TV",
182                "by Google",
183                R.drawable.gallery_photo_3));
184        listRowAdapter.add(new PhotoItem(
185                "Leanback",
186                R.drawable.gallery_photo_4));
187        listRowAdapter.add(new PhotoItem(
188                "GuidedStep (Slide left/right)",
189                R.drawable.gallery_photo_5));
190        listRowAdapter.add(new PhotoItem(
191                "GuidedStep (Slide bottom up)",
192                "Open GuidedStepFragment",
193                R.drawable.gallery_photo_6));
194        listRowAdapter.add(new PhotoItem(
195                "Android TV",
196                "open RowsActivity",
197                R.drawable.gallery_photo_7));
198        listRowAdapter.add(new PhotoItem(
199                "Leanback",
200                "open BrowseActivity",
201                R.drawable.gallery_photo_8));
202        listRowAdapter.add(new PhotoItem(
203                "Hello world",
204                R.drawable.gallery_photo_1));
205        listRowAdapter.add(new PhotoItem(
206                "This is a test",
207                "Only a test",
208                R.drawable.gallery_photo_2));
209        listRowAdapter.add(new PhotoItem(
210                "Android TV",
211                "by Google",
212                R.drawable.gallery_photo_3));
213        listRowAdapter.add(new PhotoItem(
214                "Leanback",
215                R.drawable.gallery_photo_4));
216        return listRowAdapter;
217    }
218
219    private final class ItemViewClickedListener implements OnItemViewClickedListener {
220        @Override
221        public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
222                RowPresenter.ViewHolder rowViewHolder, Row row) {
223
224            Intent intent;
225            Bundle bundle;
226            if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_6) {
227                GuidedStepFragment.add(getFragmentManager(),
228                        new GuidedStepHalfScreenActivity.FirstStepFragment(),
229                        R.id.lb_guidedstep_host);
230                return;
231            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_5) {
232                GuidedStepFragment.add(getFragmentManager(),
233                        new GuidedStepActivity.FirstStepFragment(), R.id.lb_guidedstep_host);
234                return;
235            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_8) {
236                intent = new Intent(getActivity(), BrowseActivity.class);
237                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
238                        .toBundle();
239            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_7) {
240                intent = new Intent(getActivity(), RowsActivity.class);
241                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
242                        .toBundle();
243            } else {
244                intent = new Intent(getActivity(), DetailsActivity.class);
245                intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
246                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
247                        getActivity(),
248                        ((ImageCardView) itemViewHolder.view).getMainImageView(),
249                        DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
250            }
251            getActivity().startActivity(intent, bundle);
252        }
253    }
254
255    public static class PageRowFragmentFactory extends FragmentFactory {
256
257        @Override
258        public Fragment createFragment(Object rowObj) {
259            Row row = (Row) rowObj;
260            if (row.getHeaderItem().getId() == HEADER_ID1) {
261                return new SampleRowsFragment();
262            } else if (row.getHeaderItem().getId() == HEADER_ID2) {
263                return new SampleRowsFragment();
264            } else if (row.getHeaderItem().getId() == HEADER_ID3) {
265                return new SampleFragment();
266            }
267
268            return null;
269        }
270    }
271
272    public static class SampleRowsFragment extends RowsFragment {
273        final CardPresenter mCardPresenter = new CardPresenter();
274        final CardPresenter mCardPresenter2 = new CardPresenter(R.style.MyImageCardViewTheme);
275
276        void loadFragmentData() {
277            ArrayObjectAdapter adapter = new ArrayObjectAdapter(new ListRowPresenter());
278            for (int i = 0; i < 4; i++) {
279                ListRow row = new ListRow(new HeaderItem("Row " + i), createListRowAdapter(i));
280                adapter.add(row);
281            }
282            if (getMainFragmentAdapter() != null) {
283                getMainFragmentAdapter().getFragmentHost()
284                        .notifyDataReady(getMainFragmentAdapter());
285            }
286            setAdapter(adapter);
287        }
288
289        public SampleRowsFragment() {
290            // simulates late data loading:
291            new Handler().postDelayed(new Runnable() {
292                @Override
293                public void run() {
294                    loadFragmentData();
295                }
296            }, 500);
297
298            setOnItemViewClickedListener(new OnItemViewClickedListener() {
299                @Override
300                public void onItemClicked(
301                        Presenter.ViewHolder itemViewHolder,
302                        Object item,
303                        RowPresenter.ViewHolder rowViewHolder,
304                        Row row) {
305                    Intent intent;
306                    Bundle bundle;
307                    if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_6) {
308                        GuidedStepFragment.add(getActivity().getFragmentManager(),
309                                new GuidedStepHalfScreenActivity.FirstStepFragment(),
310                                R.id.lb_guidedstep_host);
311                        return;
312                    } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_5) {
313                        GuidedStepFragment.add(getActivity().getFragmentManager(),
314                                new GuidedStepActivity.FirstStepFragment(), R.id.lb_guidedstep_host);
315                        return;
316                    } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_8) {
317                        intent = new Intent(getActivity(), BrowseActivity.class);
318                        bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
319                                .toBundle();
320                    } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_7) {
321                        intent = new Intent(getActivity(), RowsActivity.class);
322                        bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
323                                .toBundle();
324                    } else {
325                        intent = new Intent(getActivity(), DetailsActivity.class);
326                        intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
327                        bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
328                                getActivity(),
329                                ((ImageCardView) itemViewHolder.view).getMainImageView(),
330                                DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
331                    }
332                    getActivity().startActivity(intent, bundle);
333                }
334            });
335        }
336
337        private ArrayObjectAdapter createListRowAdapter(int i) {
338            ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter((i & 1) == 0 ?
339                    mCardPresenter : mCardPresenter2);
340            listRowAdapter.add(new PhotoItem(
341                    "Hello world",
342                    R.drawable.gallery_photo_1));
343            listRowAdapter.add(new PhotoItem(
344                    "This is a test",
345                    "Only a test",
346                    R.drawable.gallery_photo_2));
347            listRowAdapter.add(new PhotoItem(
348                    "Android TV",
349                    "by Google",
350                    R.drawable.gallery_photo_3));
351            listRowAdapter.add(new PhotoItem(
352                    "Leanback",
353                    R.drawable.gallery_photo_4));
354            listRowAdapter.add(new PhotoItem(
355                    "GuidedStep (Slide left/right)",
356                    R.drawable.gallery_photo_5));
357            listRowAdapter.add(new PhotoItem(
358                    "GuidedStep (Slide bottom up)",
359                    "Open GuidedStepFragment",
360                    R.drawable.gallery_photo_6));
361            listRowAdapter.add(new PhotoItem(
362                    "Android TV",
363                    "open RowsActivity",
364                    R.drawable.gallery_photo_7));
365            listRowAdapter.add(new PhotoItem(
366                    "Leanback",
367                    "open BrowseActivity",
368                    R.drawable.gallery_photo_8));
369            return listRowAdapter;
370        }
371    }
372
373    public static class PageFragmentAdapterImpl extends MainFragmentAdapter<SampleFragment> {
374
375        public PageFragmentAdapterImpl(SampleFragment fragment) {
376            super(fragment);
377            setScalingEnabled(true);
378        }
379
380        @Override
381        public void setEntranceTransitionState(boolean state) {
382            getFragment().setEntranceTransitionState(state);
383        }
384    }
385
386    public static class SampleFragment extends Fragment implements MainFragmentAdapterProvider {
387
388        final PageFragmentAdapterImpl mMainFragmentAdapter = new PageFragmentAdapterImpl(this);
389
390        public void setEntranceTransitionState(boolean state) {
391            final View view = getView();
392            int visibility = state ? View.VISIBLE : View.INVISIBLE;
393            view.findViewById(R.id.tv1).setVisibility(visibility);
394            view.findViewById(R.id.tv2).setVisibility(visibility);
395            view.findViewById(R.id.tv3).setVisibility(visibility);
396        }
397
398        @Override
399        public View onCreateView(
400                final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
401            View view = inflater.inflate(R.layout.page_fragment, container, false);
402            view.findViewById(R.id.tv1).setOnClickListener(new View.OnClickListener() {
403                @Override
404                public void onClick(View view) {
405                    Intent intent = new Intent(inflater.getContext(), GuidedStepActivity.class);
406                    startActivity(intent);
407                }
408            });
409
410            return view;
411        }
412
413        @Override
414        public void onViewCreated(View view, Bundle savedInstanceState) {
415            // static layout has view and data ready immediately
416            mMainFragmentAdapter.getFragmentHost().notifyViewCreated(mMainFragmentAdapter);
417            mMainFragmentAdapter.getFragmentHost().notifyDataReady(mMainFragmentAdapter);
418        }
419
420        @Override
421        public MainFragmentAdapter getMainFragmentAdapter() {
422            return mMainFragmentAdapter;
423        }
424    }
425}
426