Follow the basic installation steps specified here:
http://foobar2000controller.blogspot.com.es/p/how-to-start.html

Control your remote foobar2000 with your Android device! This application needs foobar2000 working in the computer and 2 more components installed in foobar 2000.

Components needed:
- foo_httpcontrol
- foo_playcount (optional)


Features:
* Widget (PRO version)
* Album art
* Common playback controls (Play/Pause, Next/Previous song, Shuffle ON/OFF)
* Control time with progress bar
* Playlist function
* Manage playlist function (add new playlist, add/remove elements by browsing files)
* Search function
* Rate current-playing song and any song in the playlist
* Queue/Dequeue elements from playlist
* Advanced search method (More of the same…artist, album or rating)
* Switch between playlists
* Configurable shake actions
* Use your device volume keys to control foobar's volume
* Wake-on-LAN
* Multi-server
* Pause/Mute on incoming calls
* Fully compatible with WaveControl (https://play.google.com/store/apps/details?id=com.MarksThinkTank.WaveControl)
* Fully compatible with headset controls and media buttons




Enjoy it!