Use replaceCurrentItem to allow playing different audio files

README.md

@@ -8,6 +8,7 @@ A Flutter audio plugin.
   - [x] play (remote and local file)
   - [x] stop
   - [x] pause
+  - [x] seek
   - [x] onComplete
   - [x] onDuration / onCurrentPosition
 
@@ -40,7 +41,7 @@ AudioPlayer audioPlayer = new AudioPlayer();
 //...
 ```
 
-### play, pause , stop
+### play, pause , stop, seek
 
 ```dart
 play() async {
@@ -65,6 +66,9 @@ stop() async {
   if (result == 1) setState(() => playerState = PlayerState.stopped);
 }
 
+// seek 5 seconds from the beginning
+audioPlayer.seek(5.0);
+
 ```
 
 ### duration, position, complete, error (temporary api) 

android/src/main/java/bz/rxla/audioplayer/AudioplayerPlugin.java

@@ -49,16 +49,26 @@ public void onMethodCall(MethodCall call, MethodChannel.Result response) {
     } else if (call.method.equals("stop")) {
       stop();
       response.success(1);
+    } else if (call.method.equals("seek")) {
+      double position = call.arguments();
+      seek(position);
+      response.success(1);
     } else {
       response.notImplemented();
     }
   }
 
+  private void seek(double position) {
+    mediaPlayer.seekTo((int) (position * 1000));
+  }
+
   private void stop() {
     handler.removeCallbacks(sendData);
-    mediaPlayer.stop();
-    mediaPlayer.release();
-    mediaPlayer = null;
+    if (mediaPlayer != null) {
+      mediaPlayer.stop();
+      mediaPlayer.release();
+      mediaPlayer = null;
+    }
   }
 
   private void pause() {

ios/Classes/SwiftAudioplayerPlugin.swift

@@ -48,6 +48,12 @@ public class SwiftAudioplayerPlugin: NSObject, FlutterPlugin {
         pause()
     case "stop":
         stop()
+    case "seek":
+        guard let sec:Double = call.arguments as? Double else {
+            result(0)
+            return
+        }
+        seek(sec)
     default:
         result(FlutterMethodNotImplemented)
     }
@@ -56,25 +62,30 @@ public class SwiftAudioplayerPlugin: NSObject, FlutterPlugin {
 
     fileprivate func togglePlay(_ url: String, isLocal:Bool) {
         print( "togglePlay \(url)" )
-        if player == nil {
-            if url != lastUrl {
-                playerItem = AVPlayerItem(url: isLocal ? URL(fileURLWithPath:url): URL(string: url)!)
-                lastUrl = url
-
-                // soundComplete handler
-                NotificationCenter.default.addObserver(
-                    forName: Notification.Name.AVPlayerItemDidPlayToEndTime,
-                    object: playerItem,
-                    queue: nil, using: onSoundComplete)
-
+        if url != lastUrl {
+            playerItem?.removeObserver(self, forKeyPath: #keyPath(player.currentItem.status))
+            NotificationCenter.default.removeObserver(onSoundComplete)
+
+            playerItem = AVPlayerItem(url: isLocal ? URL(fileURLWithPath:url): URL(string: url)!)
+            lastUrl = url
+
+            // soundComplete handler
+            NotificationCenter.default.addObserver(
+                forName: Notification.Name.AVPlayerItemDidPlayToEndTime,
+                object: playerItem,
+                queue: nil, using: onSoundComplete)
+
+            if let p = player{
+                p.replaceCurrentItem(with: playerItem)
+            } else {
                 player = AVPlayer(playerItem: playerItem)
-
-                // is sound ready
-                player!.currentItem?.addObserver(self, forKeyPath: #keyPath(player.currentItem.status), context: nil)
-
+
                 // stream player position
                 player!.addPeriodicTimeObserver(forInterval: CMTime(seconds: 0.2, preferredTimescale: CMTimeScale(NSEC_PER_SEC)), queue: nil, using: onTimeInterval)
             }
+
+            // is sound ready
+            player!.currentItem?.addObserver(self, forKeyPath: #keyPath(player.currentItem.status), context: nil)
         }
 
         if isPlaying == true {
@@ -119,6 +130,11 @@ public class SwiftAudioplayerPlugin: NSObject, FlutterPlugin {
             print("stop")
         }
     }
+
+    func seek(_ seconds: Double) {
+        let time = CMTime.init(seconds: seconds, preferredTimescale: 1);
+        playerItem?.seek(to: time);
+    }
 
     func onSoundComplete(note: Notification) {
         print("ios -> onSoundComplete...")

lib/audioplayer.dart

@@ -30,6 +30,8 @@ class AudioPlayer {
 
   Future<int> stop() => _channel.invokeMethod('stop');
 
+  Future<int> seek(double seconds) => _channel.invokeMethod('seek', seconds);
+
   void setDurationHandler(TimeChangeHandler handler) {
     durationHandler = handler;
   }