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 * Album art * Common playback controls (Play/Pause, Next/Previous song, Shuffle ON/OFF) * Control time with progress bar * Playlist function * Play from file * 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!