Only change the seekbar if it differs so that the volume sidebar does not show up on every open.

app/src/main/java/com/hyperling/apps/infinitetimer/MainActivity.java

@@ -695,7 +695,9 @@ public class MainActivity extends AppCompatActivity {
         if (DEBUG) Log.d(tag, "Starting");
 
         int currVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
-        seekBar.setProgress(currVolume);
+        if (currVolume != seekBar.getProgress()) {
+            seekBar.setProgress(currVolume);
+        }
 
         String volume = getString(R.string.tvSeekBar) + " " + seekBar.getProgress() + "/" + seekBar.getMax();
         tvSeekBar.setText(volume);