PlaybackControlHelper.java revision 8f2df00092bacbb31c883023b242bc5738bea36f 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License
15 */
16
17package com.example.android.leanback;
18
19import android.content.Context;
20import android.graphics.drawable.Drawable;
21import android.os.Handler;
22import android.support.v17.leanback.app.PlaybackControlGlue;
23import android.support.v17.leanback.widget.Action;
24import android.support.v17.leanback.widget.ArrayObjectAdapter;
25import android.support.v17.leanback.widget.ControlButtonPresenterSelector;
26import android.support.v17.leanback.widget.PlaybackControlsRow;
27import android.support.v17.leanback.widget.PlaybackControlsRowPresenter;
28import android.support.v17.leanback.widget.PresenterSelector;
29import android.support.v17.leanback.widget.SparseArrayObjectAdapter;
30import android.view.KeyEvent;
31import android.view.View;
32import android.widget.Toast;
33
34abstract class PlaybackControlHelper extends PlaybackControlGlue {
35    /**
36     * Change the location of the thumbs up/down controls
37     */
38    private static final boolean THUMBS_PRIMARY = true;
39
40    private static final String FAUX_TITLE = "A short song of silence";
41    private static final String FAUX_SUBTITLE = "2014";
42    private static final int FAUX_DURATION = 33 * 1000;
43
44    // These should match the playback service FF behavior
45    private static int[] sFastForwardSpeeds = { 2, 3, 4, 5 };
46
47    private boolean mIsPlaying;
48    private int mSpeed = PlaybackControlGlue.PLAYBACK_SPEED_PAUSED;
49    private long mStartTime;
50    private long mStartPosition = 0;
51
52    private PlaybackControlsRow.RepeatAction mRepeatAction;
53    private PlaybackControlsRow.ThumbsUpAction mThumbsUpAction;
54    private PlaybackControlsRow.ThumbsDownAction mThumbsDownAction;
55    private PlaybackControlsRow.PictureInPictureAction mPipAction;
56
57    private Handler mHandler = new Handler();
58    // simulating whether the media is yet prepared and ready to play
59    private boolean mInitialized = true;
60
61    private final Runnable mUpdateProgressRunnable = new Runnable() {
62        @Override
63        public void run() {
64            updateProgress();
65            mHandler.postDelayed(this, getUpdatePeriod());
66        }
67    };
68
69    PlaybackControlHelper(Context context, PlaybackOverlayFragment fragment) {
70        super(context, fragment, sFastForwardSpeeds);
71        mThumbsUpAction = new PlaybackControlsRow.ThumbsUpAction(context);
72        mThumbsUpAction.setIndex(PlaybackControlsRow.ThumbsUpAction.OUTLINE);
73        mThumbsDownAction = new PlaybackControlsRow.ThumbsDownAction(context);
74        mThumbsDownAction.setIndex(PlaybackControlsRow.ThumbsDownAction.OUTLINE);
75        mRepeatAction = new PlaybackControlsRow.RepeatAction(context);
76        mPipAction = new PlaybackControlsRow.PictureInPictureAction(context);
77    }
78
79    @Override
80    public PlaybackControlsRowPresenter createControlsRowAndPresenter() {
81        PlaybackControlsRowPresenter presenter = super.createControlsRowAndPresenter();
82
83        ArrayObjectAdapter adapter = new ArrayObjectAdapter(new ControlButtonPresenterSelector());
84        getControlsRow().setSecondaryActionsAdapter(adapter);
85        if (!THUMBS_PRIMARY) {
86            adapter.add(mThumbsDownAction);
87        }
88        if (android.os.Build.VERSION.SDK_INT > 23) {
89            adapter.add(mPipAction);
90        }
91        adapter.add(mRepeatAction);
92        if (!THUMBS_PRIMARY) {
93            adapter.add(mThumbsUpAction);
94        }
95
96        return presenter;
97    }
98
99    @Override
100    protected SparseArrayObjectAdapter createPrimaryActionsAdapter(
101            PresenterSelector presenterSelector) {
102        SparseArrayObjectAdapter adapter = new SparseArrayObjectAdapter(presenterSelector);
103        if (THUMBS_PRIMARY) {
104            adapter.set(PlaybackControlGlue.ACTION_CUSTOM_LEFT_FIRST, mThumbsUpAction);
105            adapter.set(PlaybackControlGlue.ACTION_CUSTOM_RIGHT_FIRST, mThumbsDownAction);
106        }
107        return adapter;
108    }
109
110    @Override
111    public void onActionClicked(Action action) {
112        if (shouldDispatchAction(action)) {
113            dispatchAction(action);
114            return;
115        }
116        super.onActionClicked(action);
117    }
118
119    @Override
120    public boolean onKey(View view, int keyCode, KeyEvent keyEvent) {
121        if (keyEvent.getAction() == KeyEvent.ACTION_DOWN) {
122            Action action = getControlsRow().getActionForKeyCode(keyEvent.getKeyCode());
123            if (shouldDispatchAction(action)) {
124                dispatchAction(action);
125                return true;
126            }
127        }
128        return super.onKey(view, keyCode, keyEvent);
129    }
130
131    private boolean shouldDispatchAction(Action action) {
132        return action == mRepeatAction || action == mThumbsUpAction || action == mThumbsDownAction;
133    }
134
135    private void dispatchAction(Action action) {
136        Toast.makeText(getContext(), action.toString(), Toast.LENGTH_SHORT).show();
137        PlaybackControlsRow.MultiAction multiAction = (PlaybackControlsRow.MultiAction) action;
138        multiAction.nextIndex();
139        notifyActionChanged(multiAction);
140    }
141
142    private void notifyActionChanged(PlaybackControlsRow.MultiAction action) {
143        int index;
144        index = getPrimaryActionsAdapter().indexOf(action);
145        if (index >= 0) {
146            getPrimaryActionsAdapter().notifyArrayItemRangeChanged(index, 1);
147        } else {
148            index = getSecondaryActionsAdapter().indexOf(action);
149            if (index >= 0) {
150                getSecondaryActionsAdapter().notifyArrayItemRangeChanged(index, 1);
151            }
152        }
153    }
154
155    private SparseArrayObjectAdapter getPrimaryActionsAdapter() {
156        return (SparseArrayObjectAdapter) getControlsRow().getPrimaryActionsAdapter();
157    }
158
159    private ArrayObjectAdapter getSecondaryActionsAdapter() {
160        return (ArrayObjectAdapter) getControlsRow().getSecondaryActionsAdapter();
161    }
162
163    @Override
164    public boolean hasValidMedia() {
165        return mInitialized;
166    }
167
168    @Override
169    public boolean isMediaPlaying() {
170        return mIsPlaying;
171    }
172
173    @Override
174    public CharSequence getMediaTitle() {
175        return FAUX_TITLE;
176    }
177
178    @Override
179    public CharSequence getMediaSubtitle() {
180        return FAUX_SUBTITLE;
181    }
182
183    @Override
184    public int getMediaDuration() {
185        return mInitialized ? FAUX_DURATION : 0;
186    }
187
188    @Override
189    public Drawable getMediaArt() {
190        return null;
191    }
192
193    @Override
194    public long getSupportedActions() {
195        return PlaybackControlGlue.ACTION_PLAY_PAUSE |
196                PlaybackControlGlue.ACTION_FAST_FORWARD |
197                PlaybackControlGlue.ACTION_REWIND;
198    }
199
200    @Override
201    public int getCurrentSpeedId() {
202        return mSpeed;
203    }
204
205    @Override
206    public int getCurrentPosition() {
207        int speed;
208        if (mSpeed == PlaybackControlGlue.PLAYBACK_SPEED_PAUSED) {
209            speed = 0;
210        } else if (mSpeed == PlaybackControlGlue.PLAYBACK_SPEED_NORMAL) {
211            speed = 1;
212        } else if (mSpeed >= PlaybackControlGlue.PLAYBACK_SPEED_FAST_L0) {
213            int index = mSpeed - PlaybackControlGlue.PLAYBACK_SPEED_FAST_L0;
214            speed = getFastForwardSpeeds()[index];
215        } else if (mSpeed <= -PlaybackControlGlue.PLAYBACK_SPEED_FAST_L0) {
216            int index = -mSpeed - PlaybackControlGlue.PLAYBACK_SPEED_FAST_L0;
217            speed = -getRewindSpeeds()[index];
218        } else {
219            return -1;
220        }
221        long position = mStartPosition +
222                (System.currentTimeMillis() - mStartTime) * speed;
223        if (position > getMediaDuration()) {
224            position = getMediaDuration();
225            onPlaybackComplete(true);
226        } else if (position < 0) {
227            position = 0;
228            onPlaybackComplete(false);
229        }
230        return (int) position;
231    }
232
233    void onPlaybackComplete(final boolean ended) {
234        mHandler.post(new Runnable() {
235            @Override
236            public void run() {
237                if (mRepeatAction.getIndex() == PlaybackControlsRow.RepeatAction.NONE) {
238                    pausePlayback();
239                } else {
240                    startPlayback(PlaybackControlGlue.PLAYBACK_SPEED_NORMAL);
241                }
242                mStartPosition = 0;
243                onStateChanged();
244            }
245        });
246    }
247
248    @Override
249    protected void startPlayback(int speed) {
250        if (speed == mSpeed) {
251            return;
252        }
253        mStartPosition = getCurrentPosition();
254        mSpeed = speed;
255        mIsPlaying = true;
256        mStartTime = System.currentTimeMillis();
257    }
258
259    @Override
260    protected void pausePlayback() {
261        if (mSpeed == PlaybackControlGlue.PLAYBACK_SPEED_PAUSED) {
262            return;
263        }
264        mStartPosition = getCurrentPosition();
265        mSpeed = PlaybackControlGlue.PLAYBACK_SPEED_PAUSED;
266        mIsPlaying = false;
267    }
268
269    @Override
270    protected void skipToNext() {
271        // Not supported
272    }
273
274    @Override
275    protected void skipToPrevious() {
276        // Not supported
277    }
278
279    @Override
280    public void enableProgressUpdating(boolean enable) {
281        mHandler.removeCallbacks(mUpdateProgressRunnable);
282        if (enable) {
283            mUpdateProgressRunnable.run();
284        }
285    }
286
287    public boolean isInitialized() {
288        return mInitialized;
289    }
290
291    public void setInitialized(boolean initialized) {
292        if (mInitialized != initialized) {
293            mInitialized = initialized;
294            onMetadataChanged();
295            onStateChanged();
296        }
297    }
298};
299