BrowseFragment.java revision b31c3281d870e9abb673db239234d580dcc4feff 
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 androidx.leanback.app.GuidedStepFragment;
21import androidx.leanback.app.RowsFragment;
22import androidx.leanback.widget.ArrayObjectAdapter;
23import androidx.leanback.widget.DividerRow;
24import androidx.leanback.widget.HeaderItem;
25import androidx.leanback.widget.ImageCardView;
26import androidx.leanback.widget.ListRow;
27import androidx.leanback.widget.ListRowPresenter;
28import androidx.leanback.widget.OnItemViewClickedListener;
29import androidx.leanback.widget.OnItemViewSelectedListener;
30import androidx.leanback.widget.PageRow;
31import androidx.leanback.widget.Presenter;
32import androidx.leanback.widget.Row;
33import androidx.leanback.widget.RowPresenter;
34import androidx.leanback.widget.SectionRow;
35import androidx.core.app.ActivityOptionsCompat;
36import androidx.core.content.res.ResourcesCompat;
37import android.util.Log;
38import android.view.LayoutInflater;
39import android.view.View;
40import android.view.ViewGroup;
41
42public class BrowseFragment extends androidx.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    private static final long HEADER_ID3 = 1003;
50
51    private ArrayObjectAdapter mRowsAdapter;
52    private BackgroundHelper mBackgroundHelper;
53
54    // For good performance, it's important to use a single instance of
55    // a card presenter for all rows using that presenter.
56    final CardPresenter mCardPresenter = new CardPresenter();
57    final CardPresenter mCardPresenter2 = new CardPresenter(R.style.MyImageCardViewTheme);
58
59    public BrowseFragment() {
60        getMainFragmentRegistry().registerFragment(PageRow.class, new PageRowFragmentFactory());
61    }
62
63    @Override
64    public void onCreate(Bundle savedInstanceState) {
65        Log.i(TAG, "onCreate");
66        super.onCreate(savedInstanceState);
67
68        mBackgroundHelper = new BackgroundHelper(getActivity());
69        mBackgroundHelper.attachToWindow();
70
71        setBadgeDrawable(ResourcesCompat.getDrawable(getActivity().getResources(),
72                R.drawable.ic_title, getActivity().getTheme()));
73        setTitle("Leanback Sample App");
74        setHeadersState(HEADERS_ENABLED);
75        setOnSearchClickedListener(new View.OnClickListener() {
76            @Override
77            public void onClick(View view) {
78                Intent intent = new Intent(getActivity(), SearchActivity.class);
79                startActivity(intent);
80            }
81        });
82
83        setOnItemViewClickedListener(new ItemViewClickedListener());
84        setOnItemViewSelectedListener(new OnItemViewSelectedListener() {
85            @Override
86            public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item,
87                    RowPresenter.ViewHolder rowViewHolder, Row row) {
88                Log.i(TAG, "onItemSelected: " + item + " row " + row);
89
90                updateBackgroundToSelection();
91            }
92        });
93        setBrowseTransitionListener(new BrowseTransitionListener() {
94            @Override
95            public void onHeadersTransitionStop(boolean withHeaders) {
96                updateBackgroundToSelection();
97            }
98        });
99        if (TEST_ENTRANCE_TRANSITION) {
100            // don't run entrance transition if fragment is restored.
101            if (savedInstanceState == null) {
102                prepareEntranceTransition();
103            }
104        }
105
106        // simulates in a real world use case  data being loaded two seconds later
107        new Handler().postDelayed(new Runnable() {
108            @Override
109            public void run() {
110                setupRows();
111                loadData();
112                startEntranceTransition();
113            }
114        }, 2000);
115    }
116
117    @Override
118    public void onStart() {
119        super.onStart();
120        updateBackgroundToSelection();
121    }
122
123    void updateBackgroundToSelection() {
124        if (!isShowingHeaders()) {
125            RowPresenter.ViewHolder rowViewHolder = getSelectedRowViewHolder();
126            Object item = rowViewHolder == null ? null : rowViewHolder.getSelectedItem();
127            if (item != null) {
128                mBackgroundHelper.setBackground(((PhotoItem) item).getImageResourceId());
129            } else {
130                mBackgroundHelper.clearDrawable();
131            }
132        } else {
133            mBackgroundHelper.clearDrawable();
134        }
135    }
136
137    @Override
138    public View onCreateView(
139            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
140        return super.onCreateView(inflater, container, savedInstanceState);
141    }
142
143    private void setupRows() {
144        ListRowPresenter listRowPresenter = new ListRowPresenter();
145        listRowPresenter.setNumRows(1);
146        mRowsAdapter = new ArrayObjectAdapter(listRowPresenter);
147    }
148
149    private void loadData() {
150        int i = 0;
151
152        mRowsAdapter.add(new PageRow(new HeaderItem(HEADER_ID1, "Page Row 0")));
153        mRowsAdapter.add(new DividerRow());
154
155        mRowsAdapter.add(new SectionRow(new HeaderItem("section 0")));
156        for (; i < NUM_ROWS; ++i) {
157            HeaderItem headerItem = new HeaderItem(i, "Row " + i);
158            headerItem.setDescription("Description for Row "+i);
159            mRowsAdapter.add(new ListRow(headerItem, createListRowAdapter(i)));
160        }
161
162        mRowsAdapter.add(new DividerRow());
163        mRowsAdapter.add(new PageRow(new HeaderItem(HEADER_ID2, "Page Row 1")));
164
165        mRowsAdapter.add(new PageRow(new HeaderItem(HEADER_ID3, "Page Row 2")));
166        setAdapter(mRowsAdapter);
167    }
168
169    private ArrayObjectAdapter createListRowAdapter(int i) {
170        ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter((i & 1) == 0 ?
171                mCardPresenter : mCardPresenter2);
172        listRowAdapter.add(new PhotoItem(
173                "Hello world",
174                R.drawable.gallery_photo_1));
175        listRowAdapter.add(new PhotoItem(
176                "This is a test",
177                "Only a test",
178                R.drawable.gallery_photo_2));
179        listRowAdapter.add(new PhotoItem(
180                "Android TV",
181                "by Google",
182                R.drawable.gallery_photo_3));
183        listRowAdapter.add(new PhotoItem(
184                "Leanback",
185                R.drawable.gallery_photo_4));
186        listRowAdapter.add(new PhotoItem(
187                "GuidedStep (Slide left/right)",
188                R.drawable.gallery_photo_5));
189        listRowAdapter.add(new PhotoItem(
190                "GuidedStep (Slide bottom up)",
191                "Open GuidedStepFragment",
192                R.drawable.gallery_photo_6));
193        listRowAdapter.add(new PhotoItem(
194                "Android TV",
195                "open RowsActivity",
196                R.drawable.gallery_photo_7));
197        listRowAdapter.add(new PhotoItem(
198                "Leanback",
199                "open BrowseActivity",
200                R.drawable.gallery_photo_8));
201        listRowAdapter.add(new PhotoItem(
202                "Hello world",
203                R.drawable.gallery_photo_1));
204        listRowAdapter.add(new PhotoItem(
205                "This is a test",
206                "Only a test",
207                R.drawable.gallery_photo_2));
208        listRowAdapter.add(new PhotoItem(
209                "Android TV",
210                "by Google",
211                R.drawable.gallery_photo_3));
212        listRowAdapter.add(new PhotoItem(
213                "Leanback",
214                R.drawable.gallery_photo_4));
215        return listRowAdapter;
216    }
217
218    private final class ItemViewClickedListener implements OnItemViewClickedListener {
219        @Override
220        public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
221                RowPresenter.ViewHolder rowViewHolder, Row row) {
222
223            Intent intent;
224            Bundle bundle;
225            if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_6) {
226                GuidedStepFragment.add(getFragmentManager(),
227                        new GuidedStepHalfScreenActivity.FirstStepFragment(),
228                        R.id.lb_guidedstep_host);
229                return;
230            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_5) {
231                GuidedStepFragment.add(getFragmentManager(),
232                        new GuidedStepActivity.FirstStepFragment(), R.id.lb_guidedstep_host);
233                return;
234            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_8) {
235                intent = new Intent(getActivity(), BrowseActivity.class);
236                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
237                        .toBundle();
238            } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_7) {
239                intent = new Intent(getActivity(), RowsActivity.class);
240                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
241                        .toBundle();
242            } else {
243                intent = new Intent(getActivity(), DetailsActivity.class);
244                intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
245                bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
246                        getActivity(),
247                        ((ImageCardView) itemViewHolder.view).getMainImageView(),
248                        DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
249            }
250            getActivity().startActivity(intent, bundle);
251        }
252    }
253
254    public static class PageRowFragmentFactory extends FragmentFactory {
255
256        @Override
257        public Fragment createFragment(Object rowObj) {
258            Row row = (Row) rowObj;
259            if (row.getHeaderItem().getId() == HEADER_ID1) {
260                return new SampleRowsFragment();
261            } else if (row.getHeaderItem().getId() == HEADER_ID2) {
262                return new SampleRowsFragment();
263            } else if (row.getHeaderItem().getId() == HEADER_ID3) {
264                return new SampleFragment();
265            }
266
267            return null;
268        }
269    }
270
271    public static class SampleRowsFragment extends RowsFragment {
272        final CardPresenter mCardPresenter = new CardPresenter();
273        final CardPresenter mCardPresenter2 = new CardPresenter(R.style.MyImageCardViewTheme);
274
275        void loadFragmentData() {
276            ArrayObjectAdapter adapter = new ArrayObjectAdapter(new ListRowPresenter());
277            for (int i = 0; i < 4; i++) {
278                ListRow row = new ListRow(new HeaderItem("Row " + i), createListRowAdapter(i));
279                adapter.add(row);
280            }
281            if (getMainFragmentAdapter() != null) {
282                getMainFragmentAdapter().getFragmentHost()
283                        .notifyDataReady(getMainFragmentAdapter());
284            }
285            setAdapter(adapter);
286        }
287
288        public SampleRowsFragment() {
289            // simulates late data loading:
290            new Handler().postDelayed(new Runnable() {
291                @Override
292                public void run() {
293                    loadFragmentData();
294                }
295            }, 500);
296
297            setOnItemViewClickedListener(new OnItemViewClickedListener() {
298                @Override
299                public void onItemClicked(
300                        Presenter.ViewHolder itemViewHolder,
301                        Object item,
302                        RowPresenter.ViewHolder rowViewHolder,
303                        Row row) {
304                    Intent intent;
305                    Bundle bundle;
306                    if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_6) {
307                        GuidedStepFragment.add(getActivity().getFragmentManager(),
308                                new GuidedStepHalfScreenActivity.FirstStepFragment(),
309                                R.id.lb_guidedstep_host);
310                        return;
311                    } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_5) {
312                        GuidedStepFragment.add(getActivity().getFragmentManager(),
313                                new GuidedStepActivity.FirstStepFragment(), R.id.lb_guidedstep_host);
314                        return;
315                    } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_8) {
316                        intent = new Intent(getActivity(), BrowseActivity.class);
317                        bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
318                                .toBundle();
319                    } else if (((PhotoItem) item).getImageResourceId() == R.drawable.gallery_photo_7) {
320                        intent = new Intent(getActivity(), RowsActivity.class);
321                        bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity())
322                                .toBundle();
323                    } else {
324                        intent = new Intent(getActivity(), DetailsActivity.class);
325                        intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
326                        bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
327                                getActivity(),
328                                ((ImageCardView) itemViewHolder.view).getMainImageView(),
329                                DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
330                    }
331                    getActivity().startActivity(intent, bundle);
332                }
333            });
334        }
335
336        private ArrayObjectAdapter createListRowAdapter(int i) {
337            ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter((i & 1) == 0 ?
338                    mCardPresenter : mCardPresenter2);
339            listRowAdapter.add(new PhotoItem(
340                    "Hello world",
341                    R.drawable.gallery_photo_1));
342            listRowAdapter.add(new PhotoItem(
343                    "This is a test",
344                    "Only a test",
345                    R.drawable.gallery_photo_2));
346            listRowAdapter.add(new PhotoItem(
347                    "Android TV",
348                    "by Google",
349                    R.drawable.gallery_photo_3));
350            listRowAdapter.add(new PhotoItem(
351                    "Leanback",
352                    R.drawable.gallery_photo_4));
353            listRowAdapter.add(new PhotoItem(
354                    "GuidedStep (Slide left/right)",
355                    R.drawable.gallery_photo_5));
356            listRowAdapter.add(new PhotoItem(
357                    "GuidedStep (Slide bottom up)",
358                    "Open GuidedStepFragment",
359                    R.drawable.gallery_photo_6));
360            listRowAdapter.add(new PhotoItem(
361                    "Android TV",
362                    "open RowsActivity",
363                    R.drawable.gallery_photo_7));
364            listRowAdapter.add(new PhotoItem(
365                    "Leanback",
366                    "open BrowseActivity",
367                    R.drawable.gallery_photo_8));
368            return listRowAdapter;
369        }
370    }
371
372    public static class PageFragmentAdapterImpl extends MainFragmentAdapter<SampleFragment> {
373
374        public PageFragmentAdapterImpl(SampleFragment fragment) {
375            super(fragment);
376            setScalingEnabled(true);
377        }
378
379        @Override
380        public void setEntranceTransitionState(boolean state) {
381            getFragment().setEntranceTransitionState(state);
382        }
383    }
384
385    public static class SampleFragment extends Fragment implements MainFragmentAdapterProvider {
386
387        final PageFragmentAdapterImpl mMainFragmentAdapter = new PageFragmentAdapterImpl(this);
388
389        public void setEntranceTransitionState(boolean state) {
390            final View view = getView();
391            int visibility = state ? View.VISIBLE : View.INVISIBLE;
392            view.findViewById(R.id.tv1).setVisibility(visibility);
393            view.findViewById(R.id.tv2).setVisibility(visibility);
394            view.findViewById(R.id.tv3).setVisibility(visibility);
395        }
396
397        @Override
398        public View onCreateView(
399                final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
400            View view = inflater.inflate(R.layout.page_fragment, container, false);
401            view.findViewById(R.id.tv1).setOnClickListener(new View.OnClickListener() {
402                @Override
403                public void onClick(View view) {
404                    Intent intent = new Intent(inflater.getContext(), GuidedStepActivity.class);
405                    startActivity(intent);
406                }
407            });
408
409            return view;
410        }
411
412        @Override
413        public void onViewCreated(View view, Bundle savedInstanceState) {
414            // static layout has view and data ready immediately
415            mMainFragmentAdapter.getFragmentHost().notifyViewCreated(mMainFragmentAdapter);
416            mMainFragmentAdapter.getFragmentHost().notifyDataReady(mMainFragmentAdapter);
417        }
418
419        @Override
420        public MainFragmentAdapter getMainFragmentAdapter() {
421            return mMainFragmentAdapter;
422        }
423    }
424}
425