Java tutorial
package android.support.v4.media; public abstract class TransportController { public abstract int getBufferPercentage(); public abstract long getCurrentPosition(); public abstract long getDuration(); public abstract int getTransportControlFlags(); public abstract boolean isPlaying(); public abstract void pausePlaying(); public abstract void registerStateListener(TransportStateListener transportStateListener); public abstract void seekTo(long j); public abstract void startPlaying(); public abstract void stopPlaying(); public abstract void unregisterStateListener(TransportStateListener transportStateListener); }