HTML5

Use Mediaplayer of Android for playing audio. You need to call function of Android from JavaScript that you have written in HTML file.

WebView wv = (WebView) findViewById(R.id.webview);
wv.addJavascriptInterface(new WebAppInterface(this), "Android");

public class WebAppInterface {
   Context mContext;
   WebAppInterface(Context c) {
      mContext = c;
   }

   @JavascriptInterface
   public void showToast(String toast) {
      Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
   }
}

The following is my JavaScript:

<input type = "button" value = "Demo" onClick = "showAndroidToast('Hello Android!')" />
<script>
   function showAndroidToast(toast) {
      Android.showToast(toast);
   }
</script>