Added callbacks to stop and pause, because the RN bridge is asynchron…

…ous (#167)

README.md

@@ -178,7 +178,11 @@ whoosh.getCurrentTime((seconds) => console.log('at ' + seconds));
 whoosh.pause();
 
 // Stop the sound and rewind to the beginning
-whoosh.stop();
+whoosh.stop(() => {
+  // Note: If you want to play a sound after stopping and rewinding it,
+  // it is important to call play() in a callback.
+  whoosh.play();
+});
 
 // Release the audio player resource
 whoosh.release();
@@ -196,13 +200,17 @@ whoosh.release();
 Return `true` if the sound has been loaded.
 
 ### `play(onEnd)`
-`onEnd` {?function(successfully)} Optinoal callback function that gets called when the playback finishes successfully or an audio decoding error interrupts it.
+`onEnd` {?function(successfully)} Optional callback function that gets called when the playback finishes successfully or an audio decoding error interrupts it.
+
+### `pause(callback)`
+`callback` {?function()} Optional callback function that gets called when the sound has been paused.
 
-### `pause()`
 Pause the sound.
 
-### `stop()`
-Stop the playback.
+### `stop(callback)`
+`callback` {?function()} Optional callback function that gets called when the sound has been stopped.
+
+Stop playback and set the seek position to 0.
 
 ### `release()`
 Release the audio player resource associated with the instance.

RNSound/RNSound.m

@@ -151,18 +151,20 @@ -(NSDictionary *)constantsToExport {
   }
 }
 
-RCT_EXPORT_METHOD(pause:(nonnull NSNumber*)key) {
+RCT_EXPORT_METHOD(pause:(nonnull NSNumber*)key withCallback:(RCTResponseSenderBlock)callback) {
   AVAudioPlayer* player = [self playerForKey:key];
   if (player) {
     [player pause];
+    callback(@[]);
   }
 }
 
-RCT_EXPORT_METHOD(stop:(nonnull NSNumber*)key) {
+RCT_EXPORT_METHOD(stop:(nonnull NSNumber*)key withCallback:(RCTResponseSenderBlock)callback) {
   AVAudioPlayer* player = [self playerForKey:key];
   if (player) {
     [player stop];
     player.currentTime = 0;
+    callback(@[]);
   }
 }
 

android/src/main/java/com/zmxv/RNSound/RNSoundModule.java

@@ -113,20 +113,22 @@ public synchronized boolean onError(MediaPlayer mp, int what, int extra) {
   }
 
   @ReactMethod
-  public void pause(final Integer key) {
+  public void pause(final Integer key, final Callback callback) {
     MediaPlayer player = this.playerPool.get(key);
     if (player != null && player.isPlaying()) {
       player.pause();
     }
+    callback.invoke();
   }
 
   @ReactMethod
-  public void stop(final Integer key) {
+  public void stop(final Integer key, final Callback callback) {
     MediaPlayer player = this.playerPool.get(key);
     if (player != null && player.isPlaying()) {
       player.pause();
       player.seekTo(0);
     }
+    callback.invoke();
   }
 
   @ReactMethod

sound.js

@@ -60,16 +60,16 @@ Sound.prototype.play = function(onEnd) {
   return this;
 };
 
-Sound.prototype.pause = function() {
+Sound.prototype.pause = function(callback) {
   if (this._loaded) {
-    RNSound.pause(this._key);
+    RNSound.pause(this._key, () => { callback && callback() });
   }
   return this;
 };
 
-Sound.prototype.stop = function() {
+Sound.prototype.stop = function(callback) {
   if (this._loaded) {
-    RNSound.stop(this._key);
+    RNSound.stop(this._key, () => { callback && callback() });
   }
   return this;
 };

windows/RNSoundModule/RNSoundModule/RNSound.cs

@@ -178,7 +178,7 @@ public void play(int key, ICallback callback)
         }
 
         [ReactMethod]
-        public void pause(int key)
+        public void pause(int key, ICallback callback)
         {
             MediaPlayer player = null;
 
@@ -190,10 +190,11 @@ public void pause(int key)
             {
                 player.Pause();
             }
+            callback.Invoke();
         }
 
         [ReactMethod]
-        public void stop(int key)
+        public void stop(int key, ICallback callback)
         {
             MediaPlayer player = null;
 
@@ -204,6 +205,7 @@ public void stop(int key)
 
             player.Pause();
             player.PlaybackSession.Position = new TimeSpan(0);
+            callback.Invoke();
         }
 
         [ReactMethod]