chrome/android/java/src/org/chromium/chrome/browser/media/ui/NotificationMediaPlaybackControls.java - chromium/src - Git at Google

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 package org.chromium.chrome.browser.media.ui;

 import android.app.PendingIntent;
 import android.app.Service;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.os.IBinder;
 import android.provider.Browser;
 import android.support.v4.app.NotificationCompat;
 import android.widget.RemoteViews;

 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.IntentHandler.TabOpenType;
 import org.chromium.chrome.browser.metrics.MediaSessionUMA;

 /**
  * A class for notifications that provide information and optional media controls for a given media.
  * Internally implements a Service for transforming notification Intents into
  * {@link MediaPlaybackListener} calls for all registered listeners.
  */
 public class NotificationMediaPlaybackControls {
     private static final Object LOCK = new Object();
     private static NotificationMediaPlaybackControls sInstance;

     /**
      * Service used to transform intent requests triggered from the notification into
      * {@code Listener} callbacks. Ideally this class should be private, but public is required to
      * create as a service.
      */
     public static class ListenerService extends Service {
         private static final String ACTION_PLAY =
                 "NotificationMediaPlaybackControls.ListenerService.PLAY";
         private static final String ACTION_PAUSE =
                 "NotificationMediaPlaybackControls.ListenerService.PAUSE";

         private PendingIntent getPendingIntent(String action) {
             Intent intent = new Intent(this, ListenerService.class);
             intent.setAction(action);
             return PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
         }

         @Override
         public IBinder onBind(Intent intent) {
             return null;
         }

         @Override
         public void onCreate() {
             super.onCreate();

             // This would only happen if we have been recreated by the OS after Chrome has died.
             // In this case, there can be no media playback happening so we don't have to show
             // the notification.
             if (sInstance == null) return;

             onServiceStarted(this);
         }

         @Override
         public void onDestroy() {
             super.onDestroy();

             if (sInstance == null) return;

             onServiceDestroyed();
         }

         @Override
         public int onStartCommand(Intent intent, int flags, int startId) {
             if (intent == null
                     || sInstance == null
                     || sInstance.mMediaNotificationInfo == null
                     || sInstance.mMediaNotificationInfo.listener == null) {
                 stopSelf();
                 return START_NOT_STICKY;
             }

             String action = intent.getAction();
             if (ACTION_PLAY.equals(action)) {
                 sInstance.mMediaNotificationInfo.listener.onPlay();
                 sInstance.onPlaybackStateChanged(false);

                 MediaSessionUMA.recordPlay(
                         MediaSessionUMA.MEDIA_SESSION_ACTION_SOURCE_MEDIA_NOTIFICATION);
             } else if (ACTION_PAUSE.equals(action)) {
                 sInstance.mMediaNotificationInfo.listener.onPause();
                 sInstance.onPlaybackStateChanged(true);

                 MediaSessionUMA.recordPause(
                         MediaSessionUMA.MEDIA_SESSION_ACTION_SOURCE_MEDIA_NOTIFICATION);
             }

             return START_NOT_STICKY;
         }
     }

     /**
      * Shows the notification with media controls with the specified media info. Replaces/updates
      * the current notification if already showing. Does nothing if |mediaNotificationInfo| hasn't
      * changed from the last one.
      *
      * @param applicationContext context to create the notification with
      * @param mediaNotificationInfo information to show in the notification
      */
     public static void show(Context applicationContext,
                             MediaNotificationInfo mediaNotificationInfo) {
         synchronized (LOCK) {
             if (sInstance == null) {
                 sInstance = new NotificationMediaPlaybackControls(applicationContext);
             }
         }
         sInstance.showNotification(mediaNotificationInfo);
     }

     /**
      * Hides the notification for the specified tabId.
      *
      * @param tabId the id of the tab that showed the notification or invalid tab id.
      */
     public static void hide(int tabId) {
         if (sInstance == null) return;
         sInstance.hideNotification(tabId);
     }

     /**
      * Hides any notification if shown by this service.
      */
     public static void clear() {
         if (sInstance == null) return;
         sInstance.clearNotification();
     }

     /**
      * Registers the started {@link Service} with the singleton and creates the notification.
      *
      * @param service the service that was started
      */
     private static void onServiceStarted(ListenerService service) {
         assert sInstance != null;
         assert sInstance.mService == null;
         sInstance.mService = service;
         sInstance.updateNotification();
     }

     /**
      * Handles the destruction
      */
     private static void onServiceDestroyed() {
         assert sInstance != null;
         assert sInstance.mService != null;
         sInstance.mNotificationBuilder = null;
         sInstance.mService = null;
     }

     private final Context mContext;

     // ListenerService running for the notification. Only non-null when showing.
     private ListenerService mService;

     private final String mPlayDescription;

     private final String mPauseDescription;

     private NotificationCompat.Builder mNotificationBuilder;

     private Bitmap mNotificationIconBitmap;

     private MediaNotificationInfo mMediaNotificationInfo;

     private NotificationMediaPlaybackControls(Context context) {
         mContext = context;
         mPlayDescription = context.getResources().getString(R.string.accessibility_play);
         mPauseDescription = context.getResources().getString(R.string.accessibility_pause);
     }

     private void showNotification(MediaNotificationInfo mediaNotificationInfo) {
         mContext.startService(new Intent(mContext, ListenerService.class));

         assert mediaNotificationInfo != null;

         if (mediaNotificationInfo.equals(mMediaNotificationInfo)) return;

         mMediaNotificationInfo = mediaNotificationInfo;
         updateNotification();
     }

     private void clearNotification() {
         mMediaNotificationInfo = null;
         mContext.stopService(new Intent(mContext, ListenerService.class));
     }

     private void hideNotification(int tabId) {
         if (mMediaNotificationInfo == null || tabId != mMediaNotificationInfo.tabId) return;
         clearNotification();
     }

     private void onPlaybackStateChanged(boolean isPaused) {
         assert mMediaNotificationInfo != null;
         mMediaNotificationInfo = new MediaNotificationInfo(
                 mMediaNotificationInfo.title,
                 isPaused,
                 mMediaNotificationInfo.origin,
                 mMediaNotificationInfo.tabId,
                 mMediaNotificationInfo.isPrivate,
                 mMediaNotificationInfo.listener);
         updateNotification();
     }

     private RemoteViews createContentView() {
         RemoteViews contentView =
                 new RemoteViews(mContext.getPackageName(), R.layout.playback_notification_bar);
         return contentView;
     }

     private String getStatus() {
         if (mMediaNotificationInfo.origin != null) {
             return mContext.getString(R.string.media_notification_link_text,
                                       mMediaNotificationInfo.origin);
         }
         return mContext.getString(R.string.media_notification_text_no_link);
     }

     private String getTitle() {
         String mediaTitle = mMediaNotificationInfo.title;
         if (mMediaNotificationInfo.isPaused) {
             return mContext.getString(
                     R.string.media_playback_notification_paused_for_media, mediaTitle);
         }
         return mContext.getString(
                 R.string.media_playback_notification_playing_for_media, mediaTitle);
     }

     private PendingIntent createContentIntent() {
         int tabId = mMediaNotificationInfo.tabId;
         Intent intent = new Intent(Intent.ACTION_MAIN);
         intent.putExtra(Browser.EXTRA_APPLICATION_ID, mContext.getPackageName());
         intent.putExtra(TabOpenType.BRING_TAB_TO_FRONT.name(), tabId);
         intent.setPackage(mContext.getPackageName());
         return PendingIntent.getActivity(mContext, tabId, intent, 0);
     }

     private void updateNotification() {
         if (mService == null) return;

         if (mMediaNotificationInfo == null) {
             // Notification was hidden before we could update it.
             assert mNotificationBuilder == null;
             return;
         }

         // Android doesn't badge the icons for RemoteViews automatically when
         // running the app under the Work profile.
         if (mNotificationIconBitmap == null) {
             Drawable notificationIconDrawable = ApiCompatibilityUtils.getUserBadgedIcon(
                     mContext, R.drawable.audio_playing);
             mNotificationIconBitmap = drawableToBitmap(notificationIconDrawable);
         }

         if (mNotificationBuilder == null) {
             mNotificationBuilder = new NotificationCompat.Builder(mContext)
                 .setSmallIcon(R.drawable.audio_playing)
                 .setAutoCancel(false)
                 .setOngoing(true);
         }
         mNotificationBuilder.setContentIntent(createContentIntent());

         RemoteViews contentView = createContentView();

         contentView.setTextViewText(R.id.title, getTitle());
         contentView.setTextViewText(R.id.status, getStatus());
         if (mNotificationIconBitmap != null) {
             contentView.setImageViewBitmap(R.id.icon, mNotificationIconBitmap);
         } else {
             contentView.setImageViewResource(R.id.icon, R.drawable.audio_playing);
         }

         if (mMediaNotificationInfo.isPaused) {
             contentView.setImageViewResource(R.id.playpause, R.drawable.ic_vidcontrol_play);
             contentView.setContentDescription(R.id.playpause, mPlayDescription);
             contentView.setOnClickPendingIntent(R.id.playpause,
                     mService.getPendingIntent(ListenerService.ACTION_PLAY));
         } else {
             contentView.setImageViewResource(R.id.playpause, R.drawable.ic_vidcontrol_pause);
             contentView.setContentDescription(R.id.playpause, mPauseDescription);
             contentView.setOnClickPendingIntent(R.id.playpause,
                     mService.getPendingIntent(ListenerService.ACTION_PAUSE));
         }

         mNotificationBuilder.setContent(contentView);
         mNotificationBuilder.setVisibility(
                 mMediaNotificationInfo.isPrivate ? NotificationCompat.VISIBILITY_PRIVATE
                                                  : NotificationCompat.VISIBILITY_PUBLIC);

         mService.startForeground(R.id.media_playback_notification, mNotificationBuilder.build());
     }

     private Bitmap drawableToBitmap(Drawable drawable) {
         if (!(drawable instanceof BitmapDrawable)) return null;

         BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
         return bitmapDrawable.getBitmap();
     }
 }
	// Copyright 2015 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	package org.chromium.chrome.browser.media.ui;

	import android.app.PendingIntent;
	import android.app.Service;
	import android.content.Context;
	import android.content.Intent;
	import android.graphics.Bitmap;
	import android.graphics.drawable.BitmapDrawable;
	import android.graphics.drawable.Drawable;
	import android.os.IBinder;
	import android.provider.Browser;
	import android.support.v4.app.NotificationCompat;
	import android.widget.RemoteViews;

	import org.chromium.base.ApiCompatibilityUtils;
	import org.chromium.chrome.R;
	import org.chromium.chrome.browser.IntentHandler.TabOpenType;
	import org.chromium.chrome.browser.metrics.MediaSessionUMA;

	/**
	* A class for notifications that provide information and optional media controls for a given media.
	* Internally implements a Service for transforming notification Intents into
	* {@link MediaPlaybackListener} calls for all registered listeners.
	*/
	public class NotificationMediaPlaybackControls {
	private static final Object LOCK = new Object();
	private static NotificationMediaPlaybackControls sInstance;

	/**
	* Service used to transform intent requests triggered from the notification into
	* {@code Listener} callbacks. Ideally this class should be private, but public is required to
	* create as a service.
	*/
	public static class ListenerService extends Service {
	private static final String ACTION_PLAY =
	"NotificationMediaPlaybackControls.ListenerService.PLAY";
	private static final String ACTION_PAUSE =
	"NotificationMediaPlaybackControls.ListenerService.PAUSE";

	private PendingIntent getPendingIntent(String action) {
	Intent intent = new Intent(this, ListenerService.class);
	intent.setAction(action);
	return PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
	}

	@Override
	public IBinder onBind(Intent intent) {
	return null;
	}

	@Override
	public void onCreate() {
	super.onCreate();

	// This would only happen if we have been recreated by the OS after Chrome has died.
	// In this case, there can be no media playback happening so we don't have to show
	// the notification.
	if (sInstance == null) return;

	onServiceStarted(this);
	}

	@Override
	public void onDestroy() {
	super.onDestroy();

	if (sInstance == null) return;

	onServiceDestroyed();
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
	if (intent == null
	\|\| sInstance == null
	\|\| sInstance.mMediaNotificationInfo == null
	\|\| sInstance.mMediaNotificationInfo.listener == null) {
	stopSelf();
	return START_NOT_STICKY;
	}

	String action = intent.getAction();
	if (ACTION_PLAY.equals(action)) {
	sInstance.mMediaNotificationInfo.listener.onPlay();
	sInstance.onPlaybackStateChanged(false);

	MediaSessionUMA.recordPlay(
	MediaSessionUMA.MEDIA_SESSION_ACTION_SOURCE_MEDIA_NOTIFICATION);
	} else if (ACTION_PAUSE.equals(action)) {
	sInstance.mMediaNotificationInfo.listener.onPause();
	sInstance.onPlaybackStateChanged(true);

	MediaSessionUMA.recordPause(
	MediaSessionUMA.MEDIA_SESSION_ACTION_SOURCE_MEDIA_NOTIFICATION);
	}

	return START_NOT_STICKY;
	}
	}

	/**
	* Shows the notification with media controls with the specified media info. Replaces/updates
	* the current notification if already showing. Does nothing if \|mediaNotificationInfo\| hasn't
	* changed from the last one.
	*
	* @param applicationContext context to create the notification with
	* @param mediaNotificationInfo information to show in the notification
	*/
	public static void show(Context applicationContext,
	MediaNotificationInfo mediaNotificationInfo) {
	synchronized (LOCK) {
	if (sInstance == null) {
	sInstance = new NotificationMediaPlaybackControls(applicationContext);
	}
	}
	sInstance.showNotification(mediaNotificationInfo);
	}

	/**
	* Hides the notification for the specified tabId.
	*
	* @param tabId the id of the tab that showed the notification or invalid tab id.
	*/
	public static void hide(int tabId) {
	if (sInstance == null) return;
	sInstance.hideNotification(tabId);
	}

	/**
	* Hides any notification if shown by this service.
	*/
	public static void clear() {
	if (sInstance == null) return;
	sInstance.clearNotification();
	}

	/**
	* Registers the started {@link Service} with the singleton and creates the notification.
	*
	* @param service the service that was started
	*/
	private static void onServiceStarted(ListenerService service) {
	assert sInstance != null;
	assert sInstance.mService == null;
	sInstance.mService = service;
	sInstance.updateNotification();
	}

	/**
	* Handles the destruction
	*/
	private static void onServiceDestroyed() {
	assert sInstance != null;
	assert sInstance.mService != null;
	sInstance.mNotificationBuilder = null;
	sInstance.mService = null;
	}

	private final Context mContext;

	// ListenerService running for the notification. Only non-null when showing.
	private ListenerService mService;

	private final String mPlayDescription;

	private final String mPauseDescription;

	private NotificationCompat.Builder mNotificationBuilder;

	private Bitmap mNotificationIconBitmap;

	private MediaNotificationInfo mMediaNotificationInfo;

	private NotificationMediaPlaybackControls(Context context) {
	mContext = context;
	mPlayDescription = context.getResources().getString(R.string.accessibility_play);
	mPauseDescription = context.getResources().getString(R.string.accessibility_pause);
	}

	private void showNotification(MediaNotificationInfo mediaNotificationInfo) {
	mContext.startService(new Intent(mContext, ListenerService.class));

	assert mediaNotificationInfo != null;

	if (mediaNotificationInfo.equals(mMediaNotificationInfo)) return;

	mMediaNotificationInfo = mediaNotificationInfo;
	updateNotification();
	}

	private void clearNotification() {
	mMediaNotificationInfo = null;
	mContext.stopService(new Intent(mContext, ListenerService.class));
	}

	private void hideNotification(int tabId) {
	if (mMediaNotificationInfo == null \|\| tabId != mMediaNotificationInfo.tabId) return;
	clearNotification();
	}

	private void onPlaybackStateChanged(boolean isPaused) {
	assert mMediaNotificationInfo != null;
	mMediaNotificationInfo = new MediaNotificationInfo(
	mMediaNotificationInfo.title,
	isPaused,
	mMediaNotificationInfo.origin,
	mMediaNotificationInfo.tabId,
	mMediaNotificationInfo.isPrivate,
	mMediaNotificationInfo.listener);
	updateNotification();
	}

	private RemoteViews createContentView() {
	RemoteViews contentView =
	new RemoteViews(mContext.getPackageName(), R.layout.playback_notification_bar);
	return contentView;
	}

	private String getStatus() {
	if (mMediaNotificationInfo.origin != null) {
	return mContext.getString(R.string.media_notification_link_text,
	mMediaNotificationInfo.origin);
	}
	return mContext.getString(R.string.media_notification_text_no_link);
	}

	private String getTitle() {
	String mediaTitle = mMediaNotificationInfo.title;
	if (mMediaNotificationInfo.isPaused) {
	return mContext.getString(
	R.string.media_playback_notification_paused_for_media, mediaTitle);
	}
	return mContext.getString(
	R.string.media_playback_notification_playing_for_media, mediaTitle);
	}

	private PendingIntent createContentIntent() {
	int tabId = mMediaNotificationInfo.tabId;
	Intent intent = new Intent(Intent.ACTION_MAIN);
	intent.putExtra(Browser.EXTRA_APPLICATION_ID, mContext.getPackageName());
	intent.putExtra(TabOpenType.BRING_TAB_TO_FRONT.name(), tabId);
	intent.setPackage(mContext.getPackageName());
	return PendingIntent.getActivity(mContext, tabId, intent, 0);
	}

	private void updateNotification() {
	if (mService == null) return;

	if (mMediaNotificationInfo == null) {
	// Notification was hidden before we could update it.
	assert mNotificationBuilder == null;
	return;
	}

	// Android doesn't badge the icons for RemoteViews automatically when
	// running the app under the Work profile.
	if (mNotificationIconBitmap == null) {
	Drawable notificationIconDrawable = ApiCompatibilityUtils.getUserBadgedIcon(
	mContext, R.drawable.audio_playing);
	mNotificationIconBitmap = drawableToBitmap(notificationIconDrawable);
	}

	if (mNotificationBuilder == null) {
	mNotificationBuilder = new NotificationCompat.Builder(mContext)
	.setSmallIcon(R.drawable.audio_playing)
	.setAutoCancel(false)
	.setOngoing(true);
	}
	mNotificationBuilder.setContentIntent(createContentIntent());

	RemoteViews contentView = createContentView();

	contentView.setTextViewText(R.id.title, getTitle());
	contentView.setTextViewText(R.id.status, getStatus());
	if (mNotificationIconBitmap != null) {
	contentView.setImageViewBitmap(R.id.icon, mNotificationIconBitmap);
	} else {
	contentView.setImageViewResource(R.id.icon, R.drawable.audio_playing);
	}

	if (mMediaNotificationInfo.isPaused) {
	contentView.setImageViewResource(R.id.playpause, R.drawable.ic_vidcontrol_play);
	contentView.setContentDescription(R.id.playpause, mPlayDescription);
	contentView.setOnClickPendingIntent(R.id.playpause,
	mService.getPendingIntent(ListenerService.ACTION_PLAY));
	} else {
	contentView.setImageViewResource(R.id.playpause, R.drawable.ic_vidcontrol_pause);
	contentView.setContentDescription(R.id.playpause, mPauseDescription);
	contentView.setOnClickPendingIntent(R.id.playpause,
	mService.getPendingIntent(ListenerService.ACTION_PAUSE));
	}

	mNotificationBuilder.setContent(contentView);
	mNotificationBuilder.setVisibility(
	mMediaNotificationInfo.isPrivate ? NotificationCompat.VISIBILITY_PRIVATE
	: NotificationCompat.VISIBILITY_PUBLIC);

	mService.startForeground(R.id.media_playback_notification, mNotificationBuilder.build());
	}

	private Bitmap drawableToBitmap(Drawable drawable) {
	if (!(drawable instanceof BitmapDrawable)) return null;

	BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
	return bitmapDrawable.getBitmap();
	}
	}