Save reader progress when activity is paused

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -493,6 +493,11 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>(),
         please_wait.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in_long))
     }
 
+    override fun onPause() {
+        presenter.saveProgress()
+        super.onPause()
+    }
+
     /**
      * Called from the presenter whenever a new [viewerChapters] have been set. It delegates the
      * method to the current viewer, but also set the subtitle on the toolbar.

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt

@@ -391,6 +391,8 @@ class ReaderPresenter(
         saveChapterHistory(fromChapter)
     }
 
+    fun saveProgress() = getCurrentChapter()?.let { onChapterChanged(it) }
+
     /**
      * Saves this [chapter] progress (last read page and whether it's read).
      */