• 使用react native制作的款网络音乐播放器 http://www.cnblogs.com/shaoting/p/6705307.html 基于第三方库 react-native-video 设计 "react-native-video": "^1.0.0"   播放/暂停  快进/快退  ...

    使用react native制作的一款网络音乐播放器 http://www.cnblogs.com/shaoting/p/6705307.html

    基于第三方库 react-native-video 设计
    "react-native-video": "^1.0.0" 

     播放/暂停

     快进/快退

     循环模式(单曲,随机,列表)

     歌词同步

     进度条显示

     播放时间

     基本旋转动画

     动画bug

     安卓歌词解析失败

     其他

    使用的数据是百度音乐

     http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.billboard.billList&type=2&size=10&offset=0 //总列表
     http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.song.lry&songid=213508 //歌词文件
     http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.song.play&songid=877578 //播放

    更多:http://67zixue.com/home/article/detail/id/22.html

    主要代码
    把秒数转换为时间类型:
    
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    //把秒数转换为时间类型
    formatTime(time) {
        // 71s -> 01:11
        let min = Math.floor(time / 60)
        let second = time - min * 60
        min = min >= 10 ? min : '0' + min
        second = second >= 10 ? second : '0' + second
        return min + ':' + second
    } 
    
    
     歌词:
    
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    [ti:阳光总在风雨后] [ar:许美静] [al:都是夜归人] [00:05.97]阳光总在风雨后 [00:14.31]演唱:许美静......
    
    

     拿到当前歌曲的歌词后,如上,把这段字符截成一个这样的数组

     

     其算法如下:

     

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    let lry = responseJson.lrcContent
    let lryAry = lry.split('\n')   //按照换行符切数组
    lryAry.forEach(function (val, index) {
        var obj = {}   //用于存放时间
        val = val.replace(/(^\s*)|(\s*$)/g, '')    //正则,去除前后空格
        let indeofLastTime = val.indexOf(']')  // ]的下标
        let timeStr = val.substring(1, indeofLastTime) //把时间切出来 0:04.19
        let minSec = ''
        let timeMsIndex = timeStr.indexOf('.')  // .的下标
        if (timeMsIndex !== -1) {
            //存在毫秒 0:04.19
            minSec = timeStr.substring(1, val.indexOf('.'))  // 0:04.
            obj.ms = parseInt(timeStr.substring(timeMsIndex + 1, indeofLastTime))  //毫秒值 19
        else {
            //不存在毫秒 0:04
            minSec = timeStr
            obj.ms = 0
        }
        let curTime = minSec.split(':')  // [0,04]
        obj.min = parseInt(curTime[0])   //分钟 0
        obj.sec = parseInt(curTime[1])   //秒钟 04
        obj.txt = val.substring(indeofLastTime + 1, val.length) //歌词文本: 留下唇印的嘴
        obj.txt = obj.txt.replace(/(^\s*)|(\s*$)/g, '')
        obj.dis = false
        obj.total = obj.min * 60 + obj.sec + obj.ms / 100   //总时间
        if (obj.txt.length > 0) {
            lyrObj.push(obj)
        }
    })

      

    歌词显示:

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    // 歌词
       renderItem() {
           // 数组
           var itemAry = [];
           for (var i = 0; i < lyrObj.length; i++) {
               var item = lyrObj[i].txt
               if (this.state.currentTime.toFixed(2) > lyrObj[i].total) {
                   //正在唱的歌词
                   itemAry.push(
                       <View key={i} style={styles.itemStyle}>
                           <Text style={{ color: 'blue' }}> {item} </Text>
                       </View>
                   );
                   _scrollView.scrollTo({x: 0,y:(25 * i),animated:false});
               }
               else {
                   //所有歌词
                   itemAry.push(
                       <View key={i} style={styles.itemStyle}>
                           <Text style={{ color: 'red' }}> {item} </Text>
                       </View>
                   )
               }
           }
     
           return itemAry;
       }

      

    其余什么播放/暂停.时间显示,快进/快退,进度条都是根据react-native-video 而来.

    完整代码:

     

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    /**
     * Created by shaotingzhou on 2017/4/13.
     */
     
    import React, { Component } from 'react'
    import {
        AppRegistry,
        StyleSheet,
        Dimensions,
        Text,
        Image,
        View,
        Slider,
        TouchableOpacity,
        ScrollView,
        ActivityIndicator,
        Animated,
        Easing
    } from 'react-native'
    var {width,height} = Dimensions.get('window');
    import Video from 'react-native-video'
    var lyrObj = []   // 存放歌词
    var myAnimate;
    //       http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.billboard.billList&type=2&size=10&offset=0    //总列表
    //       http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.song.lry&songid=213508   //歌词文件
    //       http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.song.play&songid=877578   //播放
     
     
    export default class Main extends Component {
     
        constructor(props) {
            super(props);
            this.spinValue = new Animated.Value(0)
            this.state = {
                songs: [],   //歌曲id数据源
                playModel:1,  // 播放模式  1:列表循环    2:随机    3:单曲循环
                btnModel:require('./image/列表循环.png'), //播放模式按钮背景图
                pic_small:'',    //小图
                pic_big:'',      //大图
                file_duration:0,    //歌曲长度
                song_id:'',     //歌曲id
                title:'',       //歌曲名字
                author:'',      //歌曲作者
                file_link:'',   //歌曲播放链接
                songLyr:[],     //当前歌词
                sliderValue: 0,    //Slide的value
                pause:false,       //歌曲播放/暂停
                currentTime: 0.0,   //当前时间
                duration: 0.0,     //歌曲时间
                currentIndex:0,    //当前第几首
                isplayBtn:require('./image/播放.png')  //播放/暂停按钮背景图
            }
        }
        //上一曲
        prevAction = (index) =>{
            this.recover()
            lyrObj = [];
            if(index == -1){
                index = this.state.songs.length - 1 // 如果是第一首就回到最后一首歌
            }
            this.setState({
                currentIndex:index  //更新数据
            })
            this.loadSongInfo(index)  //加载数据
        }
        //下一曲
        nextAction = (index) =>{
            this.recover()
            lyrObj = [];
            if(index == 10){
                index = 0 //如果是最后一首就回到第一首
            }
            this.setState({
                currentIndex:index,  //更新数据
            })
            this.loadSongInfo(index)   //加载数据
        }
        //换歌时恢复进度条 和起始时间
        recover = () =>{
            this.setState({
                sliderValue:0,
                currentTime: 0.0
            })
        }
        //播放模式 接收传过来的当前播放模式 this.state.playModel
        playModel = (playModel) =>{
            playModel++;
            playModel = playModel == 4 ? 1 : playModel
            //重新设置
            this.setState({
                playModel:playModel
            })
            //根据设置后的模式重新设置背景图片
            if(playModel == 1){
                this.setState({
                    btnModel:require('./image/列表循环.png'),
                })
            }else if(playModel ==  2){
                this.setState({
                    btnModel:require('./image/随机.png'),
                })
            }else{
                this.setState({
                    btnModel:require('./image/单曲循环.png'),
                })
            }
        }
        //播放/暂停
        playAction =() => {
            this.setState({
                pause: !this.state.pause
            })
            //判断按钮显示什么
            if(this.state.pause == true){
                this.setState({
                    isplayBtn:require('./image/播放.png')
                })
            }else {
                this.setState({
                    isplayBtn:require('./image/暂停.png')
                })
            }
     
        }
        //播放器每隔250ms调用一次
        onProgress =(data) => {
            let val = parseInt(data.currentTime)
            this.setState({
                sliderValue: val,
                currentTime: data.currentTime
            })
     
            //如果当前歌曲播放完毕,需要开始下一首
            if(val == this.state.file_duration){
                if(this.state.playModel == 1){
                    //列表 就播放下一首
                    this.nextAction(this.state.currentIndex + 1)
                }else if(this.state.playModel == 2){
                    let  last =  this.state.songs.length //json 中共有几首歌
                    let random = Math.floor(Math.random() * last)  //取 0~last之间的随机整数
                    this.nextAction(random) //播放
                }else{
                    //单曲 就再次播放当前这首歌曲
                    this.refs.video.seek(0) //让video 重新播放
                    _scrollView.scrollTo({x: 0,y:0,animated:false});
                }
            }
     
        }
        //把秒数转换为时间类型
        formatTime(time) {
            // 71s -> 01:11
            let min = Math.floor(time / 60)
            let second = time - min * 60
            min = min >= 10 ? min : '0' + min
            second = second >= 10 ? second : '0' + second
            return min + ':' + second
        }
        // 歌词
        renderItem() {
            // 数组
            var itemAry = [];
            for (var i = 0; i < lyrObj.length; i++) {
                var item = lyrObj[i].txt
                if (this.state.currentTime.toFixed(2) > lyrObj[i].total) {
                    //正在唱的歌词
                    itemAry.push(
                        <View key={i} style={styles.itemStyle}>
                            <Text style={{ color: 'blue' }}> {item} </Text>
                        </View>
                    );
                    _scrollView.scrollTo({x: 0,y:(25 * i),animated:false});
                }
                else {
                    //所有歌词
                    itemAry.push(
                        <View key={i} style={styles.itemStyle}>
                            <Text style={{ color: 'red' }}> {item} </Text>
                        </View>
                    )
                }
            }
     
            return itemAry;
        }
        // 播放器加载好时调用,其中有一些信息带过来
        onLoad = (data) => {
            this.setState({ duration: data.duration });
        }
     
        loadSongInfo = (index) => {
            //加载歌曲
            let songid =  this.state.songs[index]
            let url = 'http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.song.play&songid=' + songid
            fetch(url)
                .then((response) => response.json())
                .then((responseJson) => {
                    let songinfo = responseJson.songinfo
                    let bitrate = responseJson.bitrate
                    this.setState({
                        pic_small:songinfo.pic_small, //小图
                        pic_big:songinfo.pic_big,  //大图
                        title:songinfo.title,     //歌曲名
                        author:songinfo.author,   //歌手
                        file_link:bitrate.file_link,   //播放链接
                        file_duration:bitrate.file_duration //歌曲长度
                    })
     
                    //加载歌词
                    let url = 'http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.song.lry&songid=' + songid
                    fetch(url)
                        .then((response) => response.json())
                        .then((responseJson) => {
     
                            let lry = responseJson.lrcContent
                            let lryAry = lry.split('\n')   //按照换行符切数组
                            lryAry.forEach(function (val, index) {
                                var obj = {}   //用于存放时间
                                val = val.replace(/(^\s*)|(\s*$)/g, '')    //正则,去除前后空格
                                let indeofLastTime = val.indexOf(']')  // ]的下标
                                let timeStr = val.substring(1, indeofLastTime) //把时间切出来 0:04.19
                                let minSec = ''
                                let timeMsIndex = timeStr.indexOf('.')  // .的下标
                                if (timeMsIndex !== -1) {
                                    //存在毫秒 0:04.19
                                    minSec = timeStr.substring(1, val.indexOf('.'))  // 0:04.
                                    obj.ms = parseInt(timeStr.substring(timeMsIndex + 1, indeofLastTime))  //毫秒值 19
                                else {
                                    //不存在毫秒 0:04
                                    minSec = timeStr
                                    obj.ms = 0
                                }
                                let curTime = minSec.split(':')  // [0,04]
                                obj.min = parseInt(curTime[0])   //分钟 0
                                obj.sec = parseInt(curTime[1])   //秒钟 04
                                obj.txt = val.substring(indeofLastTime + 1, val.length) //歌词文本: 留下唇印的嘴
                                obj.txt = obj.txt.replace(/(^\s*)|(\s*$)/g, '')
                                obj.dis = false
                                obj.total = obj.min * 60 + obj.sec + obj.ms / 100   //总时间
                                if (obj.txt.length > 0) {
                                    lyrObj.push(obj)
                                }
                            })
                        })