This PR fixes some issues with connections and threading. Specifically, the change in #618 introduced threading in `HostConnection`, which had some issues. To fix them, the following changes were made:
- A specific TCP listener thread is used and manually started, instead of using one of the threads in the pool. The TCP listener thread is a long lived thread that should always be running (as long as the connection is through TCP), blocked listening on the TCP socket, so it shouldn't be managed in a pool, where, theoretically, it can be paused and reused.
- Changed the number of threads to 5. We shouldn't need more than this, otherwise we can overwhelm some Kodi hardware.
- Had to sprinkle some `synchronized` to avoid race conditions. For instance, through a TCP connection, as soon as Kore is opened (on the remote screen) it will call at least `GetActivePlayers`, `GetProperties`, `Ping`. If the TCP socket isn't set up yet, each of these calls would create a socket (and a TCP listener thread), so we would open 3 or more sockets when we should just open 1. A `synchronized` in `executeThroughTcp` prevents this. The others prevent similar issues.
Aditionally:
- Tweaked the playlist fetching code, so that it happens exclusively in `HostConnectionObserver` and when PlaylistFragment is notified of changes, it already gets the playlist data. This somewhat simplifies the code, and makes it more consistent with the Player Observer code;
- Change `EventServerConnection` to accept a Handler on which to post the result of the connection, so that the caller can control on which thread the result is called;
- Calls to the various `RegisterObserver` loose the reply immediately parameter, as it was always true.
Added support for handling multiple playlists in the Mock TCP server.
Refactored SlideUpPanelTests to support the new playlist handler.
Some code cleanup and enhancements
- Removed throw exception declarations from methods that never throw the exception.
- Changed deleting the test database on the test device to delete all databases.
The former method of only deleting the test database resulted in many old databases
that were not removed when the test run crashed.
- Enhanced robustness of testing async code by explicitly waiting for a view
to reach a certain state.
Some ANRs are reported on Google Play. This is an atempt to remove them, by making sure that `startForeground` is always called when the service starts.
Implemented showing a music/video/picture playlist in PlaylistFragment even
when playback has stopped but the playlist is still available on Kodi.
The playlist is now only cleared if the Playlist.OnClear event is received
from Kodi.
As the pictures playlist does not support moving/removing items this has
been disabled for the pictures playlist only.
Added a new package org.xbmc.kore.host.actions to hold all Callable's that
we use to handle complex interactions with Kodi that use multiple JSON RPC
calls.
Fixed issue in HostConnectionObserver in method notifySomethingIsPlaying
where hostState.lastGetItemResult.label might not be set.
Reduced calling (force)refreshPlaylist considerably as it should now be
handled by the playlist observer.
Registering observers would cause the runnables to be
posted multiple times to the checkerHandler. This resulted
in callbacks being called more than once when a result was
received.
* The slideup panel is only displayed when something is
playing. It starts collapsed showing the media poster
and title of what is currently playing.
* Media controls implemented are volume, progress, shuffle,
repeat and play/pause for all items. Next and previous are only
available when a music item is playing.
* In collapsed mode the panel will display the mute button only
if Kodi is muted. The mute button in expanded mode is always
visible.
* Panel is enabled by default. Users can disable the panel
in Settings
* Implemented listening to Player.OnPropertyChanged notifications
to update shuffle and repeat button states.
Tweaked the Now Playing and Playlist screens to better support YouTube videos
Changed HostConnectionObserver to notify clients not only when the id of what's playing changes but also when the label changes (YouTube videos and pictures for instance don't have ids, so the remote wasn't getting notified of a change in what's playing)
Martijn Brekhof
Synced Synapse
George Kankava
DanhDroid