Java tutorial
/* Viewer for Khan Academy Copyright (C) 2012 Concentric Sky, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.concentricsky.android.khanacademy.app; import static com.concentricsky.android.khanacademy.Constants.ACTION_BADGE_EARNED; import static com.concentricsky.android.khanacademy.Constants.ACTION_DOWNLOAD_PROGRESS_UPDATE; import static com.concentricsky.android.khanacademy.Constants.ACTION_OFFLINE_VIDEO_SET_CHANGED; import static com.concentricsky.android.khanacademy.Constants.ACTION_TOAST; import static com.concentricsky.android.khanacademy.Constants.DEFAULT_VIDEO_ID; import static com.concentricsky.android.khanacademy.Constants.EXTRA_BADGE; import static com.concentricsky.android.khanacademy.Constants.EXTRA_MESSAGE; import static com.concentricsky.android.khanacademy.Constants.EXTRA_STATUS; import static com.concentricsky.android.khanacademy.Constants.PARAM_PROGRESS_DONE; import static com.concentricsky.android.khanacademy.Constants.PARAM_PROGRESS_UNKNOWN; import static com.concentricsky.android.khanacademy.Constants.PARAM_TOPIC_ID; import static com.concentricsky.android.khanacademy.Constants.PARAM_USERVIDEO_POINTS; import static com.concentricsky.android.khanacademy.Constants.PARAM_VIDEO_ID; import static com.concentricsky.android.khanacademy.Constants.PARAM_VIDEO_PLAY_STATE; import static com.concentricsky.android.khanacademy.Constants.PARAM_VIDEO_POSITION; import static com.concentricsky.android.khanacademy.Constants.TAG_CAPTION_FRAGMENT; import static com.concentricsky.android.khanacademy.Constants.TAG_VIDEO_FRAGMENT; import java.sql.SQLException; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Locale; import java.util.Map; import java.util.Set; import android.app.AlertDialog; import android.app.FragmentTransaction; import android.content.BroadcastReceiver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.ActivityInfo; import android.content.res.Configuration; import android.os.Bundle; import android.os.Handler; import android.support.v4.content.LocalBroadcastManager; import android.text.format.Time; import android.text.method.ScrollingMovementMethod; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.view.ViewTreeObserver; import android.view.WindowManager; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.ShareActionProvider; import android.widget.TextView; import android.widget.Toast; import com.concentricsky.android.khan.R; import com.concentricsky.android.khanacademy.Constants; import com.concentricsky.android.khanacademy.MainMenuDelegate; import com.concentricsky.android.khanacademy.data.KADataService; import com.concentricsky.android.khanacademy.data.KADataService.ServiceUnavailableException; import com.concentricsky.android.khanacademy.data.db.Badge; import com.concentricsky.android.khanacademy.data.db.User; import com.concentricsky.android.khanacademy.data.db.UserVideo; import com.concentricsky.android.khanacademy.data.db.Video; import com.concentricsky.android.khanacademy.data.remote.KAAPIAdapter; import com.concentricsky.android.khanacademy.util.Log; import com.concentricsky.android.khanacademy.util.ObjectCallback; import com.concentricsky.android.khanacademy.util.OfflineVideoManager; import com.concentricsky.android.khanacademy.views.ThumbnailWrapper; import com.concentricsky.android.khanacademy.views.VideoController; import com.j256.ormlite.dao.Dao; import com.j256.ormlite.dao.GenericRawResults; import com.j256.ormlite.dao.RawRowMapper; import com.j256.ormlite.stmt.PreparedQuery; import com.j256.ormlite.stmt.QueryBuilder; public class VideoDetailActivity extends KADataServiceProviderActivityBase implements VideoFragment.Callbacks, CaptionFragment.Callbacks { public static final String LOG_TAG = VideoDetailActivity.class.getSimpleName(); private static final int POINTS_GONE = -1; private static final int NAV_HIDE_DELAY = 3000; // ms private String videoId; private String topicId; private Video video; private UserVideo userVideo; private View headerView; private TextView pointsView; private VideoFragment videoFragment; private CaptionFragment captionFragment; private MainMenuDelegate mainMenuDelegate; private Menu mainMenu; private KADataService dataService; private ShareActionProvider shareActionProvider; private int currentOrientation; private boolean navVis = true; private boolean videoIsDownloaded = false; private boolean isFullscreen; private long downTime; private String nextVideoId; private boolean shouldShowVideoControls; private boolean isBigScreen; private Time rightNow = new Time(); // As of 12/17/12, looks like most of these values are unnecessary. Point gain appears to be limited server side, // so even if the user skips ahead they will not be granted too many points. private int lastPost; // in seconds private float percentLastSaved; private boolean saving = false; private int desiredSeekPosition; private boolean isVideoPlayerPrepared; private Handler handler = new Handler(); private BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (ACTION_BADGE_EARNED.equals(intent.getAction()) && dataService != null) { Badge badge = (Badge) intent.getSerializableExtra(EXTRA_BADGE); dataService.getAPIAdapter().toastBadge(badge); } else if (ACTION_DOWNLOAD_PROGRESS_UPDATE.equals(intent.getAction())) { @SuppressWarnings("unchecked") final Map<String, Integer> youtubeIdToPct = (Map<String, Integer>) intent .getSerializableExtra(EXTRA_STATUS); if (video != null) { Integer pct = youtubeIdToPct.get(video.getYoutube_id()); if (pct != null) { VideoDetailActivity.this.prepareDownloadActionItem(mainMenu.findItem(R.id.menu_download), pct); } } } else if (ACTION_OFFLINE_VIDEO_SET_CHANGED.equals(intent.getAction())) { prepareDownloadActionItem(mainMenu.findItem(R.id.menu_download), PARAM_PROGRESS_UNKNOWN); } else if (ACTION_TOAST.equals(intent.getAction())) { Toast.makeText(VideoDetailActivity.this, intent.getStringExtra(EXTRA_MESSAGE), Toast.LENGTH_SHORT) .show(); } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getActionBar().setDisplayHomeAsUpEnabled(true); setContentView(R.layout.activity_video_detail); Intent intent = getIntent(); videoId = savedInstanceState != null && savedInstanceState.containsKey(PARAM_VIDEO_ID) ? savedInstanceState.getString(PARAM_VIDEO_ID) : intent != null && intent.hasExtra(PARAM_VIDEO_ID) ? intent.getStringExtra(PARAM_VIDEO_ID) : DEFAULT_VIDEO_ID; topicId = savedInstanceState != null && savedInstanceState.containsKey(PARAM_TOPIC_ID) ? savedInstanceState.getString(PARAM_TOPIC_ID) : intent != null && intent.hasExtra(PARAM_TOPIC_ID) ? intent.getStringExtra(PARAM_TOPIC_ID) : null; requestDataService(new ObjectCallback<KADataService>() { @Override public void call(final KADataService dataService) { VideoDetailActivity.this.dataService = dataService; dataService.getAPIAdapter().registerUserUpdateListener(userUpdateListener); setCurrentVideo(videoId, false); if (shareActionProvider != null) { shareActionProvider.setShareIntent(prepareShareIntent(video)); } User user = getCurrentUser(); setUserVideo(user, video); setupUIForCurrentVideo(); restoreVideoProgress(); } }); } @Override protected void onStart() { super.onStart(); if (dataService != null) { setupUIForCurrentVideo(); } View rightPane = findViewById(R.id.detail_right_container); isBigScreen = rightPane != null; if (mainMenu != null) { // If mainMenu is null, this activity is being created and this will happen in onCreateOptionsMenu instead. MenuItem dlItem = mainMenu.findItem(R.id.menu_download); prepareDownloadActionItem(dlItem, PARAM_PROGRESS_UNKNOWN); } IntentFilter filter = new IntentFilter(); filter.addAction(ACTION_BADGE_EARNED); filter.addAction(ACTION_OFFLINE_VIDEO_SET_CHANGED); filter.addAction(ACTION_DOWNLOAD_PROGRESS_UPDATE); filter.addAction(ACTION_TOAST); LocalBroadcastManager.getInstance(this).registerReceiver(receiver, filter); } @Override protected void onResume() { super.onResume(); findViewById(R.id.video_fragment_container).setOnTouchListener(videoTouchListener); if (dataService != null) { restoreVideoProgress(); } } @Override protected void onSaveInstanceState(Bundle outState) { // super.onSaveInstanceState(outState); // Video id, position, and whether it was playing is enough to restore state. if (video != null) { // Use actual video id here, not readable_id. We want this specific video back so it has the correct parent. outState.putString(PARAM_VIDEO_ID, video.getId()); outState.putString(PARAM_TOPIC_ID, topicId); } if (videoFragment != null) { outState.putInt(PARAM_VIDEO_POSITION, videoFragment.getVideoPosition()); outState.putBoolean(PARAM_VIDEO_PLAY_STATE, videoFragment.isPlaying()); } } @Override protected void onPause() { saveVideoProgress(); isVideoPlayerPrepared = false; if (videoFragment != null) { videoFragment.dispose(); videoFragment = null; } View container = findViewById(R.id.video_fragment_container); if (container != null) { container.setOnTouchListener(null); } super.onPause(); } @Override protected void onStop() { LocalBroadcastManager.getInstance(this).unregisterReceiver(receiver); View video = findViewById(R.id.video_fragment_container); if (video != null) { video.setOnTouchListener(null); } super.onStop(); } @Override protected void onDestroy() { super.onDestroy(); if (dataService != null) { dataService.getAPIAdapter().unregisterUserUpdateListener(userUpdateListener); dataService = null; } if (shareActionProvider != null) { shareActionProvider.setOnShareTargetSelectedListener(null); shareActionProvider = null; } } @Override public void onBackPressed() { if (isFullscreen() && isBigScreen) { if (isPortrait()) { goPortrait(); } else { goLandscape(); } } else { super.onBackPressed(); } } private View.OnTouchListener videoTouchListener = new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent e) { if (getNavVisibility() && e.getAction() == MotionEvent.ACTION_UP && downTime != e.getDownTime()) { toggleNavVisibility(); // this also removes navHider callbacks. } else if (!getNavVisibility() && e.getAction() == MotionEvent.ACTION_DOWN) { downTime = e.getDownTime(); toggleNavVisibility(); // this also removes navHider callbacks. if (videoFragment != null && videoFragment.isPlaying()) { handler.postDelayed(navHider, NAV_HIDE_DELAY); } } return false; } }; private KAAPIAdapter.UserUpdateListener userUpdateListener = new KAAPIAdapter.UserUpdateListener() { @Override public void onUserUpdate(User user) { Log.d(LOG_TAG, "onUserUpdate"); boolean loggedIn = user != null; // Look up or refresh the UserVideo. if (loggedIn && dataService != null) { try { Dao<UserVideo, Integer> userVideoDao = dataService.getHelper().getUserVideoDao(); if (userVideo == null || userVideo.getUser() == null) { Map<String, Object> values = new HashMap<String, Object>(); values.put("user_id", user.getNickname()); values.put("video_id", video.getReadable_id()); List<UserVideo> results = userVideoDao.queryForFieldValues(values); if (results.size() > 0) { Log.d(LOG_TAG, String.format("found %d results. setting first", results.size())); userVideo = results.get(0); } } else { userVideoDao.refresh(userVideo); } // Show the points badge. setPoints(userVideo.getPoints()); } catch (SQLException e) { e.printStackTrace(); } } else { Log.d(LOG_TAG, String.format("user: %s, dataService: %s", loggedIn ? user.getNickname() : "null", dataService)); // User just logged out (or we strangely lost db connectivity since the last update). userVideo = null; } } }; private void setUserVideo(User user, Video video) { Log.d(LOG_TAG, String.format("setUserVideo: %s, %s", user == null ? "null" : user.getNickname(), video == null ? "null" : video.getReadable_id())); if (user != null && video != null) { Dao<UserVideo, Integer> userVideoDao = null; try { userVideoDao = getDataService().getHelper().getUserVideoDao(); QueryBuilder<UserVideo, Integer> q = userVideoDao.queryBuilder(); q.orderBy("points", false); // In case any duplicates have slipped in, use highest point total. q.where().eq("user_id", user.getNickname()).and().eq("video_id", video.getReadable_id()); PreparedQuery<UserVideo> pq = q.prepare(); userVideo = userVideoDao.queryForFirst(pq); if (userVideo == null) { // This is possible if the user is watching this video for the first time. userVideo = new UserVideo(); userVideo.setUser(user); userVideo.setVideo_id(video.getReadable_id()); // Better save here, as we need the UserVideo to have an id before we post a progress update. userVideoDao.create(userVideo); } else { Log.d(LOG_TAG, "userVideo exists (" + userVideo.getPoints() + ") last watched: " + userVideo.getLast_watched()); } } catch (SQLException e) { // Fail silently if we can't find the UserVideo. e.printStackTrace(); } catch (ServiceUnavailableException e) { e.printStackTrace(); } // Show the points badge. setPoints(userVideo.getPoints()); } else if (video != null) { userVideo = new UserVideo(); userVideo.setVideo_id(video.getReadable_id()); } } private void setCurrentVideo(String readableId, boolean replace) { try { Dao<Video, String> videoDao = getDataService().getHelper().getVideoDao(); QueryBuilder<Video, String> q = videoDao.queryBuilder(); q.where().eq("readable_id", readableId); video = videoDao.queryForFirst(q.prepare()); if (topicId == null) { // This *should* never be the case. topicId = video.getParentTopic().getId(); } // Grab next video id. Log.d(LOG_TAG, "looking up next video"); RawRowMapper<Video> mapper = videoDao.getRawRowMapper(); GenericRawResults<Video> results = videoDao.queryRaw( "select video.* from video,topicvideo where topicvideo.topic_id=? and topicvideo.video_id=video.readable_id and video.seq>? order by video.seq limit 1", mapper, new String[] { topicId, "" + video.getSeq() }); final Video v = results.getFirstResult(); if (v != null) { nextVideoId = v.getId(); Log.d(LOG_TAG, " -> " + nextVideoId); if (mainMenu != null) { mainMenu.findItem(R.id.menu_next).setEnabled(true).setVisible(true); } } else { Log.d(LOG_TAG, " -> oops"); } } catch (SQLException e) { e.printStackTrace(); } catch (ServiceUnavailableException e) { e.printStackTrace(); } rightNow.setToNow(); lastPost = (int) (rightNow.toMillis(true) / 1000); percentLastSaved = 0; saving = false; } private void setupUIForCurrentVideo() { if (videoFragment != null) { videoFragment.dispose(); } Bundle args = new Bundle(); args.putString(Constants.PARAM_VIDEO_ID, videoId); videoFragment = new VideoFragment(); videoFragment.registerCallbacks(this); videoFragment.setArguments(args); FragmentTransaction tx = getFragmentManager().beginTransaction().replace(R.id.video_fragment_container, videoFragment, TAG_VIDEO_FRAGMENT); currentOrientation = getResources().getConfiguration().orientation; onOrientationChanged(currentOrientation); if (isPortrait()) { captionFragment = new CaptionFragment(); captionFragment.registerCallbacks(this); if (userVideo != null && userVideo.getUser() != null) { args.putInt(PARAM_USERVIDEO_POINTS, userVideo.getPoints()); } captionFragment.setArguments(args); tx.replace(R.id.detail_bottom_container, captionFragment, TAG_CAPTION_FRAGMENT); } tx.commit(); } @Override public void onVideoPrepared() { Log.d(LOG_TAG, "onVideoPrepared"); isVideoPlayerPrepared = true; shouldShowVideoControls = true; setControlsVisible(getNavVisibility()); videoFragment.seekTo(desiredSeekPosition); } @Override public void onVideoStarted() { Log.d(LOG_TAG, "onVideoStarted"); rightNow.setToNow(); lastPost = (int) (rightNow.toMillis(true) / 1000); saveVideoProgress(); handler.removeCallbacks(navHider); handler.postDelayed(navHider, NAV_HIDE_DELAY); } @Override public void onVideoStopped() { Log.d(LOG_TAG, "onVideoStopped"); setNavVisibility(true); saveVideoProgress(); } @Override public void onVideoCompleted() { Log.d(LOG_TAG, "onVideoCompleted"); isVideoPlayerPrepared = false; } @Override public void onPositionUpdate(int ms) { if (captionFragment != null) { captionFragment.onPositionUpdate(ms); } if (getCurrentUserId() == null) { return; } rightNow.setToNow(); int secondsNow = (int) (rightNow.toMillis(true) / 1000); boolean enoughTimeHasPassed = secondsNow - lastPost > Constants.LOG_INTERVAL_SECONDS; float percent = videoFragment.getPercentWatched(); boolean enoughVideoHasPlayed = percent > percentLastSaved + Constants.LOG_INTERVAL_PERCENT; if (enoughTimeHasPassed && enoughVideoHasPlayed) { // TODO : respect me boolean offline = false; if (!offline) { postVideoProgress(); } } } @Override public void onFullscreenToggleRequested() { if (isFullscreen()) { if (isPortrait()) { goPortrait(); } else { goLandscape(); } } else { goFullscreen(); } } /** * Seek video to last watched position. */ private void restoreVideoProgress() { Log.d(LOG_TAG, "restoreVideoProgress"); desiredSeekPosition = 0; if (userVideo != null) { int sec = userVideo.getLast_second_watched(); if (video.getDuration() - sec > 1) { desiredSeekPosition = sec * 1000; if (isVideoPlayerPrepared) { videoFragment.seekTo(desiredSeekPosition); } } } } /** * Update userVideo with latest data and save it. */ private void saveVideoProgress() { Log.d(LOG_TAG, "saveVideoProgress"); if (videoFragment != null && userVideo != null && userVideo.getUser() != null) { int secondsWatched = videoFragment.getClampedSecondsWatchedSince(lastPost); int lastSecondWatched = videoFragment.getSecondsWatched(); Log.d(LOG_TAG, String.format("last: %d, total: %d", lastSecondWatched, secondsWatched)); desiredSeekPosition = 1000 * lastSecondWatched; // Update the UserVideo object and save it to the db. userVideo.setLast_second_watched(lastSecondWatched); userVideo.setSeconds_watched(secondsWatched); try { dataService.getHelper().getUserVideoDao().update(userVideo); } catch (SQLException e) { e.printStackTrace(); } } } /** * Post relevant userVideo data to khan servers. */ private void postVideoProgress() { if (!saving) { Log.d(LOG_TAG, "postVideoProgress"); saving = true; final float percent = videoFragment.getPercentWatched(); Log.d(LOG_TAG, String.format("%%: %f", percent)); Runnable success = new Runnable() { public void run() { rightNow.setToNow(); lastPost = (int) (rightNow.toMillis(true) / 1000); finishVideoProgressSave(percent); } }; Runnable error = new Runnable() { public void run() { finishVideoProgressSave(percentLastSaved); } }; // Save progress to ensure correct values are on the userVideo before posting. saveVideoProgress(); // The api adapter causes a user update after posting this. dataService.getAPIAdapter().postVideoProgress(userVideo, success, error); } } private void finishVideoProgressSave(float percent) { percentLastSaved = percent; saving = false; } @Override public void onPositionRequested(int ms) { if (videoFragment != null) { videoFragment.seekTo(ms); } } @Override public void onCaptionsUnavailable() { Log.d(LOG_TAG, "onCaptionsUnavailable"); if (isBigScreen) { findViewById(R.id.detail_right_header).setVisibility(View.GONE); } } @Override public void onCaptionsLoaded() { if (isBigScreen) { findViewById(R.id.detail_right_header).setVisibility(View.VISIBLE); } } @Override public void onDownloadRequested(Video video) { OfflineVideoManager ovm; try { ovm = getDataService().getOfflineVideoManager(); ovm.downloadVideo(video); } catch (ServiceUnavailableException e) { e.printStackTrace(); } } private String getCurrentUserId() { return getSharedPreferences(Constants.SETTINGS_NAME, Context.MODE_PRIVATE) .getString(Constants.SETTING_USERID, null); } /** * Get the current user. * * @return the user or null. */ private User getCurrentUser() { Log.v(LOG_TAG, "getCurrentUser"); String userid = getCurrentUserId(); if (userid == null) { // no user saved Log.v(LOG_TAG, " --> null (no id)"); return null; } User user = null; try { user = getDataService().getHelper().getUserDao().queryForId(userid); } catch (SQLException e) { // That's fine; pretend no user was logged in. e.printStackTrace(); } catch (ServiceUnavailableException e) { // That's fine; pretend no user was logged in. e.printStackTrace(); } Log.v(LOG_TAG, String.format(" --> %s", user == null ? "null" : user.getNickname())); return user; } private boolean isPortrait() { return getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT; } private boolean isFullscreen() { return isFullscreen; } private void launchVideoDetailActivity(String videoId, String topicId) { // TODO : animate the transition Intent intent = new Intent(this, VideoDetailActivity.class); intent.putExtra(PARAM_VIDEO_ID, videoId); intent.putExtra(PARAM_TOPIC_ID, topicId); startActivity(intent); } private void launchListActivity(String topicId, Class<?> activityClass) { Intent intent = new Intent(this, activityClass); intent.putExtra(PARAM_TOPIC_ID, topicId); // ALWAYS goes to this video's parent topic. If this assumption breaks, then we must rethink the clear_top flag. intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); } private Intent prepareShareIntent(Video video) { Intent intent = new Intent(Intent.ACTION_SEND); String url = video.getKa_url(); intent.putExtra("title", video.getTitle()); intent.putExtra("url", url); intent.putExtra("desc", video.getDescription()); intent.setType("text/plain"); return intent; } private void prepareDownloadActionItem(MenuItem item, int downloadPercent) { item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); int dlRes = R.drawable.av_download; int removeRes = R.drawable.content_discard; switch (downloadPercent) { case PARAM_PROGRESS_DONE: videoIsDownloaded = true; item.setEnabled(true).setTitle("Downloaded").setIcon(getResources().getDrawable(removeRes)); break; case PARAM_PROGRESS_UNKNOWN: if (video != null) { try { dataService.getHelper().getVideoDao().refresh(video); } catch (SQLException e) { e.printStackTrace(); } switch (video.getDownload_status()) { case Video.DL_STATUS_COMPLETE: videoIsDownloaded = true; item.setEnabled(true).setTitle("Downloaded").setIcon(getResources().getDrawable(removeRes)); break; case Video.DL_STATUS_IN_PROGRESS: videoIsDownloaded = false; item.setEnabled(false).setTitle("Downloading").setIcon(getResources().getDrawable(dlRes)); break; case Video.DL_STATUS_NOT_STARTED: default: videoIsDownloaded = false; item.setEnabled(true).setTitle("Download").setIcon(getResources().getDrawable(dlRes)); } } break; default: videoIsDownloaded = false; item.setEnabled(false).setTitle(downloadPercent + "%").setIcon(null); } } private void prepareShareActionItem(MenuItem shareItem) { shareActionProvider = (ShareActionProvider) shareItem.getActionProvider(); shareActionProvider.setShareHistoryFileName(ShareActionProvider.DEFAULT_SHARE_HISTORY_FILE_NAME); shareActionProvider.setOnShareTargetSelectedListener(shareTargetSelectedListener); shareActionProvider.setShareIntent(prepareShareIntent(video)); } ShareActionProvider.OnShareTargetSelectedListener shareTargetSelectedListener = new ShareActionProvider.OnShareTargetSelectedListener() { @Override public boolean onShareTargetSelected(ShareActionProvider source, Intent intent) { Log.d(LOG_TAG, "onShareTargetSelected: " + intent.getStringExtra(Intent.EXTRA_TEXT)); String lowerFqn = intent.getComponent().getClassName().toLowerCase(Locale.US); // Twitter if (lowerFqn.contains("twitter") || lowerFqn.contains("tweet")) { // Twitter clients use the EXTRA_TEXT only, with 140c limit. int tweetLength = 140; String tweetFormat = "just learned about \"%s\" (%s) via @khanacademy"; // As an example, the following tweet is 127 characters. // just learned about 'Lebron Asks: What are the chances of making 10 free throws in a row?' (20 char link is here) via @khanacademy // Links in tweets take exactly 20 characters (https://support.twitter.com/articles/78124-how-to-post-links-urls-in-tweets). int linkLength = 20; int usedLength = tweetFormat.length() - "%s".length() + linkLength; // We know the length the link will take. usedLength -= "%s".length(); // The title will replace an instance of this string. // Truncate the title to fit the tweet. int remainingSpace = tweetLength - usedLength; String title = intent.getStringExtra("title"); if (title.length() > remainingSpace) { title = title.substring(0, remainingSpace - 3) + "..."; } String tweet = String.format(tweetFormat, title, intent.getStringExtra("url")); intent.putExtra(Intent.EXTRA_TEXT, tweet); } else { String subject = "just learned about " + intent.getStringExtra("title"); intent.putExtra(Intent.EXTRA_SUBJECT, subject); String bodyFormat = "\"%s\" (%s) is one of nearly 4,000 great educational videos at http://www.khanacademy.org/."; String body = String.format(bodyFormat, intent.getStringExtra("title"), intent.getStringExtra("url")); String desc = intent.getStringExtra("desc"); if (desc != null && desc.length() > 0) { body += "\n\nVideo description: " + desc; } intent.putExtra(Intent.EXTRA_TEXT, body); } // In docs for this method: "NOTE: Modifying the intent is not permitted and any changes to the latter will be ignored." // Since we need to modify the intent (that's the whole point of this callback, isn't it?!), we launch the activity ourselves. // Launch in new task, hopefully avoiding the case where the user already has facebook open to another activity and we don't see the share activity. intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); return true; } }; @Override public boolean onCreateOptionsMenu(Menu menu) { mainMenuDelegate = new MainMenuDelegate(this); mainMenu = menu; MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.video_detail, menu); MenuItem dlItem = menu.findItem(R.id.menu_download); prepareDownloadActionItem(dlItem, PARAM_PROGRESS_UNKNOWN); MenuItem shareItem = menu.findItem(R.id.menu_share); prepareShareActionItem(shareItem); if (nextVideoId == null) { mainMenu.findItem(R.id.menu_next).setVisible(false).setEnabled(false); } return true; } @Override public boolean onPrepareOptionsMenu(Menu menu) { Log.d(LOG_TAG, "onPrepareOptionsMenu"); requestDataService(new ObjectCallback<KADataService>() { @Override public void call(KADataService dataService) { User user = dataService.getAPIAdapter().getCurrentUser(); boolean show = user != null; mainMenu.findItem(R.id.menu_logout).setEnabled(show).setVisible(show); } }); return true; } private void promptAndDeleteDownloadedVideo(final Video video) { new AlertDialog.Builder(this).setMessage(getString(R.string.msg_delete_video)) .setPositiveButton(getString(R.string.button_confirm_delete), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { deleteDownloadedVideo(video); VideoDetailActivity.this.prepareDownloadActionItem( mainMenu.findItem(R.id.menu_download), PARAM_PROGRESS_UNKNOWN); } }) .setNegativeButton(getString(R.string.button_cancel), null).show(); } private void deleteDownloadedVideo(Video video) { final Set<Video> toDelete = new HashSet<Video>(1); toDelete.add(video); requestDataService(new ObjectCallback<KADataService>() { @Override public void call(KADataService dataService) { dataService.getOfflineVideoManager().deleteOfflineVideos(toDelete); Toast.makeText(VideoDetailActivity.this, getString(R.string.msg_deleted), Toast.LENGTH_SHORT) .show(); } }); } @Override public boolean onOptionsItemSelected(MenuItem item) { android.util.Log.w(LOG_TAG, "onOptionsItemSelected"); Log.d(LOG_TAG, "onOptionsItemSelected"); if (mainMenuDelegate.onOptionsItemSelected(item)) { return true; } switch (item.getItemId()) { case R.id.menu_next: if (nextVideoId != null && topicId != null) { launchVideoDetailActivity(nextVideoId, topicId); } return true; case R.id.menu_logout: dataService.getAPIAdapter().logout(); return true; case R.id.menu_download: if (!videoIsDownloaded) { onDownloadRequested(video); } else { promptAndDeleteDownloadedVideo(video); } return true; case android.R.id.home: // VideoList for this video's parent topic. if (isFullscreen() && isBigScreen) { if (isPortrait()) { goPortrait(); } else { goLandscape(); } } else { launchListActivity(topicId, VideoListActivity.class); } return true; default: return super.onOptionsItemSelected(item); } } @Override public void onConfigurationChanged(Configuration config) { super.onConfigurationChanged(config); if (config.orientation != currentOrientation) onOrientationChanged(config.orientation); } private void onOrientationChanged(final int orientation) { currentOrientation = orientation; if (!isFullscreen || !isBigScreen) { switch (orientation) { case Configuration.ORIENTATION_LANDSCAPE: goLandscape(); break; case Configuration.ORIENTATION_PORTRAIT: goPortrait(); break; default: } } } private void createAndAttachCaptionFragment(int containerId) { FragmentTransaction tx = getFragmentManager().beginTransaction(); if (captionFragment != null) { tx.remove(captionFragment); } captionFragment = new CaptionFragment(); Bundle args = new Bundle(); if (video != null) { args.putString(Constants.PARAM_VIDEO_ID, video.getId()); if (videoFragment != null) { args.putInt(PARAM_VIDEO_POSITION, videoFragment.getVideoPosition()); } } // Set args even if empty to avoid possible NPE inside CaptionFragment. captionFragment.setArguments(args); captionFragment.registerCallbacks(this); tx.replace(containerId, captionFragment); tx.commit(); // Force execute, so we can populateHeader afterward. getFragmentManager().executePendingTransactions(); } private void createAndAttachHeader() { FrameLayout container = (FrameLayout) findViewById(R.id.detail_header_container); if (headerView == null) { headerView = getLayoutInflater().inflate(R.layout.video_header, container, true); populateHeader(); pointsView = (TextView) findViewById(R.id.video_points); if (userVideo != null && userVideo.getUser() != null) { setPoints(userVideo.getPoints()); } } } private void populateHeader() { View headerView = findViewById(R.id.video_header); Log.d(LOG_TAG, "populateHeader: header is " + (headerView == null ? "null" : "not null")); if (video != null && headerView != null) { ((TextView) headerView.findViewById(R.id.video_title)).setText(video.getTitle()); String desc = video.getDescription(); TextView descView = (TextView) headerView.findViewById(R.id.video_description); if (desc != null && desc.length() > 0) { descView.setText(desc); descView.setVisibility(View.VISIBLE); descView.setMovementMethod(new ScrollingMovementMethod()); } else { descView.setVisibility(View.GONE); } } } private void goFullscreen() { goFullscreen(true); } private void goFullscreen(boolean force) { isFullscreen = true; setRequestedOrientation(force ? ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE : ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED); VideoController videoControls = (VideoController) findViewById(R.id.controller); if (videoControls != null) { videoControls.setFullscreen(true); } ThumbnailWrapper videoContainer = (ThumbnailWrapper) findViewById(R.id.video_fragment_container); videoContainer.setMaintainAspectRatio(false); if (captionFragment != null) { FragmentTransaction tx = getFragmentManager().beginTransaction(); tx.remove(captionFragment); tx.commit(); } findViewById(R.id.detail_bottom_container).setVisibility(View.GONE); if (isBigScreen) { findViewById(R.id.detail_right_container).setVisibility(View.GONE); findViewById(R.id.detail_center_divider).setVisibility(View.GONE); } setNavVisibility(videoFragment == null || !videoFragment.isPlaying()); getDecorViewTreeObserver().addOnGlobalLayoutListener(layoutFixer); } private void goLandscape() { if (isBigScreen) { goLargeLandscape(); } else { goFullscreen(false); } } private void goLargeLandscape() { isFullscreen = false; setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED); VideoController videoControls = (VideoController) findViewById(R.id.controller); if (videoControls != null) { videoControls.setFullscreen(false); } ThumbnailWrapper videoContainer = (ThumbnailWrapper) findViewById(R.id.video_fragment_container); videoContainer.setMaintainAspectRatio(true); FrameLayout headerContainer = (FrameLayout) findViewById(R.id.detail_header_container); LinearLayout.LayoutParams p = (LinearLayout.LayoutParams) headerContainer.getLayoutParams(); p.weight = 1; headerContainer.setLayoutParams(p); headerContainer.setVisibility(View.VISIBLE); FrameLayout emptyContainer = (FrameLayout) findViewById(R.id.detail_bottom_container); p = (LinearLayout.LayoutParams) emptyContainer.getLayoutParams(); p.weight = 0; emptyContainer.setLayoutParams(p); emptyContainer.setVisibility(View.GONE); findViewById(R.id.detail_right_container).setVisibility(View.VISIBLE); createAndAttachCaptionFragment(R.id.detail_right_caption_container); createAndAttachHeader(); findViewById(R.id.detail_center_divider).setVisibility(View.VISIBLE); getDecorViewTreeObserver().addOnGlobalLayoutListener(layoutFixer); } private void goPortrait() { isFullscreen = false; setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED); VideoController videoControls = (VideoController) findViewById(R.id.controller); if (videoControls != null) { videoControls.setFullscreen(false); } ThumbnailWrapper videoContainer = (ThumbnailWrapper) findViewById(R.id.video_fragment_container); videoContainer.setMaintainAspectRatio(true); FrameLayout headerContainer = (FrameLayout) findViewById(R.id.detail_header_container); LinearLayout.LayoutParams p = (LinearLayout.LayoutParams) headerContainer.getLayoutParams(); p.weight = 0; headerContainer.setLayoutParams(p); createAndAttachCaptionFragment(R.id.detail_bottom_container); FrameLayout captionContainer = (FrameLayout) findViewById(R.id.detail_bottom_container); captionContainer.setVisibility(View.VISIBLE); p = (LinearLayout.LayoutParams) captionContainer.getLayoutParams(); p.weight = 1; captionContainer.setLayoutParams(p); if (isBigScreen) { findViewById(R.id.detail_right_container).setVisibility(View.GONE); findViewById(R.id.detail_center_divider).setVisibility(View.GONE); } setNavVisibility(true); createAndAttachHeader(); getDecorViewTreeObserver().addOnGlobalLayoutListener(layoutFixer); } public void setPoints(int points) { Log.d(LOG_TAG, "setPoints (" + points + ")"); if (pointsView == null) { return; } if (points == POINTS_GONE) { pointsView.setVisibility(View.GONE); } else { pointsView.setText(String.format("%d", points)); pointsView.setVisibility(View.VISIBLE); } } private ViewTreeObserver getDecorViewTreeObserver() { ViewTreeObserver decorViewTreeObserver = getWindow().getDecorView().getViewTreeObserver(); return decorViewTreeObserver; } int previousActionBarHeight = -1; // Runs after orientation changes to push the portrait views down below the overlaid actionbar. Running this code // directly in onOrientationChanged caused it to fail the first time we entered portrait orientation. private ViewTreeObserver.OnGlobalLayoutListener layoutFixer = new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { if (isFullscreen()) { final View containerView = findViewById(R.id.detail_pane_container); final FrameLayout.LayoutParams p = (FrameLayout.LayoutParams) containerView.getLayoutParams(); p.setMargins(0, 0, 0, 0); containerView.setLayoutParams(p); previousActionBarHeight = 0; } else { getActionBar().show(); int actionBarHeight = getActionBar().getHeight(); // Action bar height changes between landscape and portrait on Fire HD (!) if (actionBarHeight != previousActionBarHeight) { // First one fails, second one works. (4.2.1) // p.topMargin = getActionBar().getHeight(); // p.setMargins(0, getActionBar().getHeight(), 0, 0); final View containerView = findViewById(R.id.detail_pane_container); final FrameLayout.LayoutParams p = (FrameLayout.LayoutParams) containerView.getLayoutParams(); p.setMargins(0, actionBarHeight, 0, 0); containerView.setLayoutParams(p); previousActionBarHeight = actionBarHeight; } } getDecorViewTreeObserver().removeGlobalOnLayoutListener(this); } }; private void toggleNavVisibility() { setNavVisibility(!getNavVisibility()); } private boolean getNavVisibility() { return navVis; } private void setNavVisibility(boolean visible) { Log.d(LOG_TAG, "setNavVisibility: " + visible); // Fire HD: // View.SYSTEM_UI_FLAG_LOW_PROFILE | View.SYSTEM_UI_FLAG_FULLSCREEN : These do nothing. // View.SYSTEM_UI_FLAG_HIDE_NAVIGATION : This works as expected, but isn't good enough. // WindowManager.LayoutParams.FLAG_FULLSCREEN : This is great, but // a) can't keep stable layout (video grows when added, shrinks when removed), // b) No way to hook the event where the user touches the handle, so that behavior differs from a touch on the rest of the screen. handler.removeCallbacks(navHider); navVis = visible; if (visible) { // Flags, menu items, and action bar should already be correct in portrait, but it won't hurt. findViewById(R.id.detail_pane_container).setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE); getWindow().setFlags(0, WindowManager.LayoutParams.FLAG_FULLSCREEN); getActionBar().show(); if (mainMenu != null) { for (int i = 0; i < mainMenu.size(); ++i) { mainMenu.getItem(i).setVisible(true); } } setControlsVisible(shouldShowVideoControls); if (videoFragment != null && videoFragment.isPlaying()) { handler.postDelayed(navHider, NAV_HIDE_DELAY); } } else { if (isFullscreen()) { findViewById(R.id.detail_pane_container).setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE); getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN); getActionBar().hide(); // Hide menu items in landscape to prevent the action overflow menu / share menu from // disappearing on nav hide when the user is trying to interact with them. // The right solution would be to force the nav to stay open while the menus are open, // but there doesn't appear to be a way to check (?!). We get NO call to onOptionsMenuClosed // when that is overridden, so we cannot track it ourselves either. In fact, if the options menu // is open it consumes the first touch event outside itself to close itself, so we can't even // do it by listening to touches and assuming they close the menu. if (mainMenu != null) { for (int i = 0; i < mainMenu.size(); ++i) { mainMenu.getItem(i).setVisible(false); } } } setControlsVisible(false); } } private void setControlsVisible(boolean visible) { VideoController videoControls = (VideoController) findViewById(R.id.controller); if (videoControls != null) { if (visible) { videoControls.show(); } else { videoControls.hide(); } } } private Runnable navHider = new Runnable() { @Override public void run() { if (!isFinishing()) { setNavVisibility(false); } } }; }