在Android上使用酷狗歌词API

参考自http://blog.csdn.net/u010752082/article/details/50810190

代码先贴出来：

 public void searchLyric(){
     final String name = musicName.getText().toString();
     final String duration = musicDuration.getText().toString();
     new Thread(new Runnable() {
         @Override
         public void run() {
             try {
                 //建立连接 -- 查找歌曲
                 String urlStr = "http://lyrics.kugou.com/search?ver=1&man=yes&client=pc&keyword=" + name + "&duration=" + duration + "&hash=";
                 URL url = new URL(encodeUrl(urlStr));  //字符串进行URL编码
                 HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                 conn.connect();

                 //读取流 -- JSON歌曲列表
                 InputStream input = conn.getInputStream();
                 String res = FileUtil.formatStreamToString(input);  //流转字符串

                 JSONObject json1 = new JSONObject(res);  //字符串读取为JSON
                 JSONArray json2 = json1.getJSONArray("candidates");
                 JSONObject json3 = json2.getJSONObject(0);

                 //建立连接 -- 查找歌词
                 urlStr = "http://lyrics.kugou.com/download?ver=1&client=pc&id=" + json3.get("id") + "&accesskey=" + json3.get("accesskey") + "&fmt=lrc&charset=utf8";
                 url = new URL(encodeUrl(urlStr));
                 conn = (HttpURLConnection) url.openConnection();
                 conn.connect();

                 //读取流 -- 歌词
                 input = conn.getInputStream();
                 res = FileUtil.formatStreamToString(input);
                 JSONObject json4 = new JSONObject(res);

                 //获取歌词base64，并进行解码
                 String base64 = json4.getString("content");
                 final String lyric = Base64.getFromBASE64(base64);

                 Log.i("lyric", lyric);

                 runOnUiThread(new Runnable() {
                     @Override
                     public void run() {
                         showLyric.setText(lyric);
                     }
                 });

             } catch (Exception e) {
                 e.printStackTrace();
             }
         }
     }).start();
 }

首先说明一下，要搜索到歌词，需要先搜索歌曲，得到歌曲对应的id和accesskey后才能进行歌词的获取。

那么我们先从搜索歌曲的URL开始说起：

String urlStr = "http://lyrics.kugou.com/search?ver=1&man=yes&client=pc&keyword=" + name + "&duration=" + duration + "&hash=";

其中的name为搜索条件，最好为文件名或者“歌手 - 标题”的形式，搜索比较准确。duration为歌曲时长，单位毫秒。

记得要先对字符串链接进行URL编码。

读取流并转换为字符串：

InputStream input = conn.getInputStream();
String res = FileUtil.formatStreamToString(input);  //流转字符串

接收到的数据res是这样的：

 {"ugccandidates":[],
         "ugc":0,
         "info":"OK",
         "status":200,
         "proposal":"22422076",
         "keyword":"Impossible",
         "candidates":[
             {
                 "soundname":"", "krctype":2, "nickname":"", "originame":"", "accesskey":
                 "C3D2BF9DD8A47A3FFB622B660D820B8D", "parinfo":[],"origiuid":"0", "score":60, "hitlayer":
                 7, "duration":227000, "sounduid":"0", "song":"Impossible", "uid":"410927974", "transuid":
                 "0", "transname":"", "adjust":0, "id":"22422076", "singer":"Måns Zelmerlöw", "language":""
             },

             {
                 "soundname":"", "krctype":2, "nickname":"", "originame":"", "accesskey":
                 "F92BD21B377150B8F3C67B2A034D6FE0", "parinfo":[],"origiuid":"0", "score":50, "hitlayer":
                 7, "duration":227000, "sounduid":"0", "song":"Impossible", "uid":"486959192", "transuid":
                 "0", "transname":"", "adjust":0, "id":"19445996", "singer":"The Top Hits Band", "language":
                 ""
             },

             {
                 "soundname":"", "krctype":2, "nickname":"", "originame":"", "accesskey":
                 "2B6A8E1CD4B59F475E28F2AF811F59E9", "parinfo":[],"origiuid":"0", "score":40, "hitlayer":
                 7, "duration":226750, "sounduid":"0", "song":"Impossible", "uid":"410927974", "transuid":
                 "0", "transname":"", "adjust":0, "id":"19201245", "singer":"Shontelle", "language":""
             },

             {
                 "soundname":"", "krctype":2, "nickname":"", "originame":"", "accesskey":
                 "D5B9AD83A10659CE2DAAD618C934F382", "parinfo":[],"origiuid":"0", "score":30, "hitlayer":
                 7, "duration":227000, "sounduid":"0", "song":"Impossible", "uid":"486958479", "transuid":
                 "0", "transname":"", "adjust":0, "id":"19160542", "singer":"The Top Hits Band", "language":
                 ""
             },

             {
                 "soundname":"", "krctype":2, "nickname":"", "originame":"", "accesskey":
                 "27C664BC593E1B60D486E34AE479EFE7", "parinfo":[],"origiuid":"0", "score":20, "hitlayer":
                 7, "duration":227000, "sounduid":"0", "song":"Impossible", "uid":"486953482", "transuid":
                 "0", "transname":"", "adjust":0, "id":"18918409", "singer":"Tiffany Evans", "language":""
             }
         ]
     }

我们可以用new JSONObject()将字符串转换为JSON对象，再取出candidates部分

JSONObject json1 = new JSONObject(res);  //字符串读取为JSON
JSONArray json2 = json1.getJSONArray("candidates");

现在json2就是一个搜索到的歌曲集合了，我们一般取第一个结果，是比较精确的：

JSONObject json3 = json2.getJSONObject(0);

好的，现在我们已经获取到了歌曲信息，接下来就是通过歌曲信息搜索歌词。

搜索歌词的URL需要两个参数，id和accesskey，都可以从刚刚取到的歌曲信息json3中得到：

urlStr = "http://lyrics.kugou.com/download?ver=1&client=pc&id=" + json3.get("id") + "&accesskey=" + json3.get("accesskey") + "&fmt=lrc&charset=utf8";

进行连接后，我们就能获取到歌词的相关数据了：

其中content就是歌词的内容，但是我们发现是经过base64编码过的，我们需要对其进行解码：

//读取流 -- 歌词
input = conn.getInputStream();
res = FileUtil.formatStreamToString(input);
JSONObject json4 = new JSONObject(res);

//获取歌词base64，并进行解码
String base64 = json4.getString("content");
String lyric = Base64.getFromBASE64(base64);

最后lyric就是我们解码后的歌词了：

到这里基本就结束了。

服务器返回的值有可能是空的，由于时间关系在这里就不写判断了。

流转String、字符串URL编码、base64解码都可以在网上找到，代码比较多这里就不贴出来了。

candidates