html - Android simple mp3 playback -

i'm building android app using dreamweaver , want have audio.

i made index.html , put script in head:

<script type="text/javascript">   function init() {     var button = document.getelementbyid("a");     if (button.addeventlistener) {       button.addeventlistener("click", function () {         mp.create(getapplicationcontext(), r.raw.hound).start();       }, false);     }   } </script> 

i put hound.mp3 in /res/raw/

and put button on page:

<button id="a" value="click">play</button> 

then exported .apk , installed on phone, music doesn't play when push button. missing something?

thanks comments. switched java/xml because i'm finding out eclipse better way develop app. sound problem did fix, this:

mainactivity.java:

final mediaplayer mp = mediaplayer.create(this, r.raw.something);          button play_button = (button)this.findviewbyid(r.id.play_button);          play_button.setonclicklistener(new view.onclicklistener() {          public void onclick(view v) {          mp.start();                 }             }); 

activity_main.xml:

<button         android:id="@+id/play_button"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/play_button" /> 

strings.xml:

   <string name="button_send">play</string>    <string name="play_button">play</string>