Fix bug where "end of stream" event was being triggered too early

app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt

@@ -418,17 +418,21 @@ class DitDahSoundStream : AudioTrack.OnPlaybackPositionUpdateListener {
                 SoundTypes.WORD_SPACE -> mWordSpacingSound
             }
 
-            mSoundPlayer.write(soundToWrite, 0, soundToWrite.size)
-
             // Keep track of the number of samples we wrote to fire our "finished" listener
+            // This is done before the write(), since a blocking call might erroneously cause
+            // us to detect the end of the lesson to early.
             // (Seems "frames" and "samples" are interchangeable in the API?)
             mNumberFramesWritten += soundToWrite.size
             mSoundPlayer.setNotificationMarkerPosition(mNumberFramesWritten)
 
+            mSoundPlayer.write(soundToWrite, 0, soundToWrite.size)
+
             // If this is the first symbol, we'll need to start playing.
             if (mSoundPlayer.playState != AudioTrack.PLAYSTATE_PLAYING)
                 mSoundPlayer.play()
         }
+
+
     }
 
     // Optional listener for stream finished event
@@ -470,7 +474,8 @@ class DitDahSoundStream : AudioTrack.OnPlaybackPositionUpdateListener {
         .build();
 
     override fun onMarkerReached(track: AudioTrack?) {
-        streamNotificationListener?.streamFinished(this)
+        if(track!!.notificationMarkerPosition >= mNumberFramesWritten)
+            streamNotificationListener?.streamFinished(this)
     }
 
     override fun onPeriodicNotification(track: AudioTrack?) {

app/src/main/java/es/eoinrul/ecwt/TrainingResultsActivity.kt

@@ -0,0 +1,12 @@
+package es.eoinrul.ecwt
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class TrainingResultsActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_training_results)
+    }
+}

app/src/main/res/layout/activity_training_results.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".TrainingResultsActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>