Implemented native call to the android MediaSession.

android/AndroidManifest.xml

@@ -7,7 +7,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="org.kde.kasts"
           android:versionName="0.0.1"
-          android:versionCode="1628121202"
+          android:versionCode="1628239323"
           android:installLocation="auto">
 
     <supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>

android/src/org/kde/kasts/MediaService.java

@@ -18,7 +18,33 @@ import android.util.Log;
 
 public class MediaService extends Service {
     public static final String TAG = "MediaService";
+
     private MediaSessionCompat mSession;
+    private PlaybackStateCompat.Builder mPBuilder;
+
+    public void setSessionState(int state)
+    {
+        switch(state) {
+            case 0: {
+                mPBuilder.setActions(PlaybackStateCompat.ACTION_PAUSE | PlaybackStateCompat.ACTION_STOP);
+                mPBuilder.setState(PlaybackStateCompat.STATE_PLAYING,
+                        0, 1.0f);
+                mSession.setPlaybackState(mPBuilder.build());
+            }
+            case 1: {
+                mPBuilder.setActions(PlaybackStateCompat.ACTION_PLAY | PlaybackStateCompat.ACTION_STOP);
+                mPBuilder.setState(PlaybackStateCompat.STATE_PAUSED,
+                        0, 1.0f);
+                mSession.setPlaybackState(mPBuilder.build());
+            }
+            case 2: {
+                mPBuilder.setActions(PlaybackStateCompat.ACTION_PAUSE | PlaybackStateCompat.ACTION_STOP);
+                mPBuilder.setState(PlaybackStateCompat.STATE_STOPPED,
+                        0, 1.0f);
+                mSession.setPlaybackState(mPBuilder.build());
+            }
+        }
+    }
 
     private class MediaSessionCallback extends MediaSessionCompat.Callback {
         private Context mContext;
@@ -66,6 +92,7 @@ public class MediaService extends Service {
                 MediaSessionCompat.FLAG_HANDLES_QUEUE_COMMANDS |
                 MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
         mSession.setCallback(new MediaSessionCallback(this));
+        mPBuilder = new PlaybackStateCompat.Builder();
     }
 
     @Override

src/CMakeLists.txt

@@ -30,6 +30,7 @@ set(SRCS_base
     models/downloadmodel.cpp
     models/errorlogmodel.cpp
     models/podcastsearchmodel.cpp
+    mediasessionclient.cpp
     mpris2/mpris2.cpp
     powermanagementinterface.cpp
     resources.qrc

src/audiomanager.cpp

@@ -23,6 +23,7 @@
 #include "models/errorlogmodel.h"
 #include "powermanagementinterface.h"
 #include "settingsmanager.h"
+#include "mediasessionclient.h"
 
 static const double MAX_RATE = 1.0;
 static const double MIN_RATE = 2.5;
@@ -78,6 +79,8 @@ AudioManager::AudioManager(QObject *parent)
 
     connect(this, &AudioManager::logError, &ErrorLogModel::instance(), &ErrorLogModel::monitorErrorMessages);
 
+    MediaSessionClient mClient(this);
+
     // Check if an entry was playing when the program was shut down and restore it
     if (DataManager::instance().lastPlayingEntry() != QStringLiteral("none")) {
         setEntry(DataManager::instance().getEntry(DataManager::instance().lastPlayingEntry()));

src/mediasessionclient.cpp

@@ -8,9 +8,36 @@
 #include "audiomanager.h"
 
 #include <QtAndroid>
+#include <qDebug>
 
-MediaSessionClient::MediaSessionClient(QObject *parent)
+MediaSessionClient::MediaSessionClient(AudioManager *audioPlayer, QObject *parent)
     : QObject(parent)
+    , m_audioPlayer(audioPlayer)
 {
-    //connections to be added here.
+    connect(m_audioPlayer, &AudioManager::playbackStateChanged, this, &MediaSessionClient::setState);
+}
+
+void MediaSessionClient::setState()
+{
+    QDebug() << m_audioPlayer->playbackState();
+    switch(m_audioPlayer->playbackState()) {
+        case QMediaPlayer::StoppedState :
+            QAndroidJniObject::callStaticMethod<jint>
+                                ("org/kde/kasts/MediaService"
+                                , "setSessionState"
+                                , "(I)I"
+                                , 2);
+        case QMediaPlayer::PausedState :
+            QAndroidJniObject::callStaticMethod<jint>
+                                ("org/kde/kasts/MediaService"
+                                , "setSessionState"
+                                , "(I)I"
+                                , 1);
+        case QMediaPlayer::PlayingState :
+            QAndroidJniObject::callStaticMethod<jint>
+                                ("org/kde/kasts/MediaService"
+                                , "setSessionState"
+                                , "(I)I"
+                                , 0);
+    }
 }

src/mediasessionclient.h

@@ -6,8 +6,18 @@
 
 #pragma once
 
-class MediaSessionClient
+#include <QObject>
+
+class AudioManager;
+
+class MediaSessionClient : public QObject
 {
 public:
-    explicit MediaSessionClient(QObject *parent = nullptr);
+    explicit MediaSessionClient(AudioManager *audioPlayer, QObject *parent = nullptr);
+
+private Q_SLOTS:
+    void setState();
+
+private:
+    AudioManager *m_audioPlayer = nullptr;
 };