Production Code of UsbPlayer.prev() implemented

3 years ago · ebd9395495
1 changed files with 6 additions and 1 deletions
--- a/src/main/java/device/usbPlayer/UsbPlayer.java
+++ b/src/main/java/device/usbPlayer/UsbPlayer.java
@ -118,7 +118,12 @@ public class UsbPlayer implements Device {

    @Override
    public void prev() {
-
+        int currentIdex = Playlist.indexOf(playTrack);
+        int nextIndex = Playlist.size() - 1;
+        if (currentIdex != 0) {
+            nextIndex = (currentIdex - 1);
+        }
+        playTrack = Playlist.get(nextIndex);
    }

    @Override