Fix widget PendingIntents on Oreo+

Thanks to KBerstene daneren2005/Subsonic#957

Author: nvllsvm

Diff for: app/src/main/java/net/nullsum/audinaut/provider/AudinautWidgetProvider.java

@@ -34,6 +34,7 @@
 import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
 import android.graphics.RectF;
+import android.os.Build;
 import android.os.Environment;
 import android.util.Log;
 import android.view.View;
@@ -286,19 +287,28 @@ private void linkButtons(Context context, RemoteViews views) {
         intent = new Intent("Audinaut.PLAY_PAUSE");
         intent.setComponent(new ComponentName(context, DownloadService.class));
         intent.setAction(DownloadService.CMD_TOGGLEPAUSE);
-        pendingIntent = PendingIntent.getService(context, 0, intent, 0);
+        if (Build.VERSION.SDK_INT >= 26)
+            pendingIntent = PendingIntent.getForegroundService(context, 0, intent, 0);
+        else
+            pendingIntent = PendingIntent.getService(context, 0, intent, 0);
         views.setOnClickPendingIntent(R.id.control_play, pendingIntent);
 
         intent = new Intent("Audinaut.NEXT");  // Use a unique action name to ensure a different PendingIntent to be created.
         intent.setComponent(new ComponentName(context, DownloadService.class));
         intent.setAction(DownloadService.CMD_NEXT);
-        pendingIntent = PendingIntent.getService(context, 0, intent, 0);
+        if (Build.VERSION.SDK_INT >= 26)
+            pendingIntent = PendingIntent.getForegroundService(context, 0, intent, 0);
+        else
+            pendingIntent = PendingIntent.getService(context, 0, intent, 0);
         views.setOnClickPendingIntent(R.id.control_next, pendingIntent);
 
         intent = new Intent("Audinaut.PREVIOUS");  // Use a unique action name to ensure a different PendingIntent to be created.
         intent.setComponent(new ComponentName(context, DownloadService.class));
         intent.setAction(DownloadService.CMD_PREVIOUS);
-        pendingIntent = PendingIntent.getService(context, 0, intent, 0);
+        if (Build.VERSION.SDK_INT >= 26)
+            pendingIntent = PendingIntent.getForegroundService(context, 0, intent, 0);
+        else
+            pendingIntent = PendingIntent.getService(context, 0, intent, 0);
         views.setOnClickPendingIntent(R.id.control_previous, pendingIntent);
     }
 }