Create individual stream notifications for convenience on Android 7.0 and later.

Author: Isira-Seneviratne

app/src/main/java/org/schabi/newpipe/local/feed/notifications/NotificationHelper.kt

@@ -1,6 +1,8 @@
 package org.schabi.newpipe.local.feed.notifications
 
+import android.app.Notification
 import android.app.NotificationManager
+import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
 import android.graphics.Bitmap
@@ -12,6 +14,7 @@ import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import androidx.core.app.PendingIntentCompat
 import androidx.core.content.ContextCompat
+import androidx.core.content.getSystemService
 import androidx.preference.PreferenceManager
 import com.squareup.picasso.Picasso
 import com.squareup.picasso.Target
@@ -26,31 +29,30 @@ import org.schabi.newpipe.util.PicassoHelper
  * Helper for everything related to show notifications about new streams to the user.
  */
 class NotificationHelper(val context: Context) {
-
-    private val manager = context.getSystemService(
-        Context.NOTIFICATION_SERVICE
-    ) as NotificationManager
-
+    private val manager = context.getSystemService<NotificationManager>()!!
     private val iconLoadingTargets = ArrayList<Target>()
 
     /**
-     * Show a notification about new streams from a single channel.
-     * Opening the notification will open the corresponding channel page.
+     * Show notifications for new streams from a single channel. The individual notifications are
+     * expandable on Android 7.0 and later.
+     *
+     * Opening the summary notification will open the corresponding channel page. Opening the
+     * individual notifications will open the corresponding video.
      */
-    fun displayNewStreamsNotification(data: FeedUpdateInfo) {
-        val newStreams: List<StreamInfoItem> = data.newStreams
+    fun displayNewStreamsNotifications(data: FeedUpdateInfo) {
+        val newStreams = data.newStreams
         val summary = context.resources.getQuantityString(
             R.plurals.new_streams, newStreams.size, newStreams.size
         )
-        val builder = NotificationCompat.Builder(
+        val summaryBuilder = NotificationCompat.Builder(
             context,
             context.getString(R.string.streams_notification_channel_id)
         )
             .setContentTitle(Localization.concatenateStrings(data.name, summary))
             .setContentText(
                 data.listInfo.relatedItems.joinToString(
                     context.getString(R.string.enumeration_comma)
-                ) { x -> x.name }
+                ) { it.name }
             )
             .setNumber(newStreams.size)
             .setBadgeIconType(NotificationCompat.BADGE_ICON_LARGE)
@@ -60,16 +62,19 @@ class NotificationHelper(val context: Context) {
             .setColorized(true)
             .setAutoCancel(true)
             .setCategory(NotificationCompat.CATEGORY_SOCIAL)
+            .setGroupSummary(true)
+            .setGroup(data.listInfo.url)
+            .setGroupAlertBehavior(NotificationCompat.GROUP_ALERT_SUMMARY)
 
-        // Build style
+        // Build a summary notification for Android versions < 7.0
         val style = NotificationCompat.InboxStyle()
+            .setSummaryText(summary)
+            .setBigContentTitle(data.name)
         newStreams.forEach { style.addLine(it.name) }
-        style.setSummaryText(summary)
-        style.setBigContentTitle(data.name)
-        builder.setStyle(style)
+        summaryBuilder.setStyle(style)
 
-        // open the channel page when clicking on the notification
-        builder.setContentIntent(
+        // open the channel page when clicking on the summary notification
+        summaryBuilder.setContentIntent(
             PendingIntentCompat.getActivity(
                 context,
                 data.pseudoId,
@@ -84,13 +89,21 @@ class NotificationHelper(val context: Context) {
         // a Target is like a listener for image loading events
         val target = object : Target {
             override fun onBitmapLoaded(bitmap: Bitmap, from: Picasso.LoadedFrom) {
-                builder.setLargeIcon(bitmap) // set only if there is actually one
-                manager.notify(data.pseudoId, builder.build())
+                summaryBuilder.setLargeIcon(bitmap) // set only if there is actually one
+
+                // Show individual stream notifications
+                showStreamNotifications(newStreams, data.listInfo.serviceId)
+                // Show summary notification
+                manager.notify(data.pseudoId, summaryBuilder.build())
+
                 iconLoadingTargets.remove(this) // allow it to be garbage-collected
             }
 
             override fun onBitmapFailed(e: Exception, errorDrawable: Drawable) {
-                manager.notify(data.pseudoId, builder.build())
+                // Show individual stream notifications
+                showStreamNotifications(newStreams, data.listInfo.serviceId)
+                // Show summary notification
+                manager.notify(data.pseudoId, summaryBuilder.build())
                 iconLoadingTargets.remove(this) // allow it to be garbage-collected
             }
 
@@ -106,6 +119,41 @@ class NotificationHelper(val context: Context) {
         PicassoHelper.loadNotificationIcon(data.avatarUrl).into(target)
     }
 
+    private fun showStreamNotifications(newStreams: List<StreamInfoItem>, serviceId: Int) {
+        newStreams.asSequence()
+            .map { it to createStreamNotification(it, serviceId) }
+            .forEach { (stream, notification) ->
+                manager.notify(stream.url.hashCode(), notification)
+            }
+    }
+
+    private fun createStreamNotification(item: StreamInfoItem, serviceId: Int): Notification {
+        return NotificationCompat.Builder(
+            context,
+            context.getString(R.string.streams_notification_channel_id)
+        )
+            .setSmallIcon(R.drawable.ic_newpipe_triangle_white)
+            .setContentTitle(item.name)
+            .setContentText(item.uploaderName)
+            .setGroup(item.uploaderUrl)
+            .setColor(ContextCompat.getColor(context, R.color.ic_launcher_background))
+            .setColorized(true)
+            .setAutoCancel(true)
+            .setCategory(NotificationCompat.CATEGORY_SOCIAL)
+            .setContentIntent(
+                // Open the stream link in the player when clicking on the notification.
+                PendingIntentCompat.getActivity(
+                    context,
+                    item.url.hashCode(),
+                    NavigationHelper.getStreamIntent(context, serviceId, item.url, item.name),
+                    PendingIntent.FLAG_UPDATE_CURRENT,
+                    false
+                )
+            )
+            .setSilent(true) // Avoid creating noise for individual stream notifications.
+            .build()
+    }
+
     companion object {
         /**
          * Check whether notifications are enabled on the device.
@@ -124,9 +172,7 @@ class NotificationHelper(val context: Context) {
         fun areNotificationsEnabledOnDevice(context: Context): Boolean {
             return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                 val channelId = context.getString(R.string.streams_notification_channel_id)
-                val manager = context.getSystemService(
-                    Context.NOTIFICATION_SERVICE
-                ) as NotificationManager
+                val manager = context.getSystemService<NotificationManager>()!!
                 val enabled = manager.areNotificationsEnabled()
                 val channel = manager.getNotificationChannel(channelId)
                 val importance = channel?.importance

app/src/main/java/org/schabi/newpipe/local/feed/notifications/NotificationWorker.kt

@@ -55,7 +55,7 @@ class NotificationWorker(
             .map { feedUpdateInfoList ->
                 // display notifications for each feedUpdateInfo (i.e. channel)
                 feedUpdateInfoList.forEach { feedUpdateInfo ->
-                    notificationHelper.displayNewStreamsNotification(feedUpdateInfo)
+                    notificationHelper.displayNewStreamsNotifications(feedUpdateInfo)
                 }
                 return@map Result.success()
             }

app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java

@@ -563,11 +563,8 @@ public static void openVideoDetail(final Context context,
                                        @Nullable final PlayQueue playQueue,
                                        final boolean switchingPlayers) {
 
-        final Intent intent = getOpenIntent(context, url, serviceId,
-                StreamingService.LinkType.STREAM);
-        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-        intent.putExtra(Constants.KEY_TITLE, title);
-        intent.putExtra(VideoDetailFragment.KEY_SWITCHING_PLAYERS, switchingPlayers);
+        final Intent intent = getStreamIntent(context, serviceId, url, title)
+                .putExtra(VideoDetailFragment.KEY_SWITCHING_PLAYERS, switchingPlayers);
 
         if (playQueue != null) {
             final String cacheKey = SerializedCache.getInstance().put(playQueue, PlayQueue.class);
@@ -680,6 +677,15 @@ public static Intent getChannelIntent(final Context context,
         return getOpenIntent(context, url, serviceId, StreamingService.LinkType.CHANNEL);
     }
 
+    public static Intent getStreamIntent(final Context context,
+                                         final int serviceId,
+                                         final String url,
+                                         @Nullable final String title) {
+        return getOpenIntent(context, url, serviceId, StreamingService.LinkType.STREAM)
+                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                .putExtra(Constants.KEY_TITLE, title);
+    }
+
     /**
      * Finish this <code>Activity</code> as well as all <code>Activities</code> running below it
      * and then start <code>MainActivity</code>.