Android歌词秀设计思路（6）运用Proxy设计模式简化歌词播放服务(5)

    }else{ 
        return 0; 
    } 
} 
 
public long seekToLyric(int index){ 
    if(mPlaybackService != null){ 
        return mPlaybackService.seekToLyric(index); 
    }else{ 
        return 0; 
    } 
} 
 
public void seekToNextLyric(){ 
    if(mPlaybackService != null){ 
        mPlaybackService.seekToNextLyric(); 
    } 
} 
 
public void seekToPrevLyric(){ 
    if(mPlaybackService != null){ 
        mPlaybackService.seekToPrevLyric(); 
    } 
} 
 
public long seek(long whereto) { 
    if(mPlaybackService != null){ 
        return mPlaybackService.seek(whereto); 
    }else{ 
        return 0; 
    } 
}    
 
public void setLyricPlayerListener(LyricPlayerService.LyricPlayerListener listener){ 
    mLyricListener = listener; 
    if(mPlaybackService != null){ 
        mPlaybackService.setLyricPlayerListener(mLyricListener); 
    } 
}
 
 软件的功能介绍，源码下载：原创：Android应用开发-Andorid歌词秀,含源码
作者 “来自大连”