android音乐播放器开发在线加载歌词

转载请注明出处: http://blog.csdn.net/u014608640/article/details/51899239

如果没有本地歌词怎么办？现在来将一下加载在线歌词。好了，还是用那张图。

在实现这个功能的时候，lz尝试过baidu api，歌词迷api，后来选用了歌词迷api，虽然还是资源不全，而且还有很多错误。特别头疼的是有时候歌词居然不分行，解析起来简直难受。

歌词迷api歌词查询地址：http://geci.me/api/lyric/

比如我要查询： http://geci.me/api/lyric/安静/周杰伦

会得到一下json串：

{"count": 2, "code": 0, "result": [{"aid": 2223011, "artist_id": 30796, "song": "\u5b89\u9759", "lrc": "http://s.geci.me/lrc/257/25700/2570058.lrc", "sid": 2570058}, {"aid": 2336033, "artist_id": 30796, "song": "\u5b89\u9759", "lrc": "http://s.geci.me/lrc/272/27282/2728244.lrc", "sid": 2728244}]}

很容易发现里面的歌词文件，然后缓冲到本地（SweetMusicPlayer/Lryics）下，再按本地加载的方式就行了。

捋一捋，我们加载歌词文件要经过以下步骤。

1）通过地址查询出歌词的地址。（这里楼主用URLConnection）

2）通过歌词地址缓冲歌词文件。（这里楼主用URLConnection）

3）加载缓冲好的歌词文件。

上面说的看起来还是比较容易，楼主自己写了个demo,是一个Java工程，发现没啥问题，正常加载歌词文件。

等到Android上，第一步就跪了。发现URLConnection的getInputStream()抛出一个io异常，简直要命，折腾了半天才发现是因为带了http://geci.me/api/lyric/安静/周杰伦中文路径。由于默认是gbk，网络传输为utf-8,所以要把中文转码，URLEncoder.encode(str,"utf-8")；即可。

到了第2步，问题又出现了，歌词乱码。解决办法，用字符流操作比较合适，还要注意同一编码。

[java] view plain copy

package com.huwei.sweetmusicplayer.util;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.Random;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.Environment;
import android.util.Log;
public class OnlineLrcUtil {
private static String TAG = "OnlineLrcUtil";
private static OnlineLrcUtil instance;
public static final String lrcRootPath = Environment
.getExternalStorageDirectory().toString()
+ "/SweetMusicPlayer/Lyrics/";
public static final String queryLrcURLRoot = "http://geci.me/api/lyric/";
public static OnlineLrcUtil getInstance() {
if (null == instance) {
instance = new OnlineLrcUtil();
}
return instance;
}
public String getQueryLrcURL(String title, String artist) {
return queryLrcURLRoot + Encode(title) + "/" + Encode(artist);
}
public String getLrcURL(String title, String artist) {
String queryLrcURLStr = getQueryLrcURL(title, artist);
try {
URL url = new URL(queryLrcURLStr);
URLConnection urlConnection = url.openConnection();
urlConnection.connect();
BufferedReader in = new BufferedReader(new InputStreamReader(
urlConnection.getInputStream()));
StringBuffer sb = new StringBuffer();
String temp;
while ((temp = in.readLine()) != null) {
sb.append(temp);
}
JSONObject jObject = new JSONObject(sb.toString());
int count = jObject.getInt("count");
int index = count == 0 ? 0 : new Random().nextInt() % count;
JSONArray jArray = jObject.getJSONArray("result");
JSONObject obj = jArray.getJSONObject(index);
return obj.getString("lrc");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
// 歌手，歌曲名中的空格进行转码
public String Encode(String str) {
try {
return URLEncoder.encode(str.trim(), "utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return str;
}
// 歌词文件网络地址，歌词文件本地缓冲地址
public boolean wrtieContentFromUrl(String urlPath, String lrcPath) {
Log.i(TAG, "lrcURL" + urlPath);
try {
URL url = new URL(urlPath);
URLConnection urlConnection = url.openConnection();
urlConnection.connect();
HttpURLConnection httpConn = (HttpURLConnection) urlConnection;
if (httpConn.getResponseCode() == HttpURLConnection.HTTP_OK) {
File file = new File(lrcRootPath);
if (!file.exists()) {
file.mkdirs();
}
BufferedReader bf = new BufferedReader(new InputStreamReader(
urlConnection.getInputStream(), "utf-8"));
PrintWriter out = new PrintWriter(new BufferedWriter(
new OutputStreamWriter(new FileOutputStream(lrcPath),
"utf-8")));
char c[] = new char[256];
int temp = -1;
while ((temp = bf.read()) != -1) {
bf.read(c);
out.write(c);
}
bf.close();
out.close();
return true;
}
// System.out.println("getFile:"+str);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return false;
}
public String getLrcPath(String title, String artist) {
return lrcRootPath + title + " - " + artist + ".lrc";
}
}

LrcProcess 类，用来保存处理下载后的文件

public class LrcProcess {private List lrcList;//List集合存放歌词内容对象private LrcContent mLrcContent;//声明一个歌词内容对象/** * 无参构造函数用来实例化对象 */public LrcProcess() {mLrcContent = new LrcContent();lrcList = new ArrayList();}/** * 读取歌词 * @param path * @return */public String readLRC(String path) {//定义一个StringBuilder对象，用来存放歌词内容StringBuilder stringBuilder = new StringBuilder();File f = new File(path.replace(".mp3", ".lrc"));try {//创建一个文件输入流对象FileInputStream fis = new FileInputStream(f);InputStreamReader isr = new InputStreamReader(fis, "utf-8");BufferedReader br = new BufferedReader(isr);String s = "";while((s = br.readLine()) != null) {//替换字符s = s.replace("[", "");s = s.replace("]", "@");//分离“@”字符String splitLrcData[] = s.split("@");if(splitLrcData.length > 1) {Log.i("INFO", splitLrcData[1]+"歌词");mLrcContent.setLrcStr(splitLrcData[1]);Log.i("INFO", splitLrcData[0]+"时间");//处理歌词取得歌曲的时间int lrcTime = time2Str(splitLrcData[0]);mLrcContent.setLrcTime(lrcTime);//添加进列表数组lrcList.add(mLrcContent);//新创建歌词内容对象mLrcContent = new LrcContent();}}} catch (FileNotFoundException e) {e.printStackTrace();stringBuilder.append("木有歌词文件，赶紧去下载！...");} catch (IOException e) {e.printStackTrace();stringBuilder.append("木有读取到歌词哦！");}return stringBuilder.toString();}/** * 解析歌词时间 * 歌词内容格式如下： * [00:02.32]陈奕迅 * [00:03.43]好久不见 * [00:05.22]歌词制作  王涛 * @param timeStr * @return */public int time2Str(String timeStr) {timeStr = timeStr.replace(":", ".");timeStr = timeStr.replace(".", "@");String timeData[] = timeStr.split("@");//将时间分隔成字符串数组//分离出分、秒并转换为整型int minute = Integer.parseInt(timeData[0]);int second = Integer.parseInt(timeData[1]);int millisecond = Integer.parseInt(timeData[2]);//计算上一行与下一行的时间转换为毫秒数int currentTime = (minute * 60 + second) * 1000 + millisecond * 10;return currentTime;}public List getLrcList() {return lrcList;}

Mainactivity 大概调用方法

public class MainActivity extends Activity {      //好久不见    青花    private String mMusicName="夜曲";    //陈奕迅  周传雄    private String mMusicAutor="周杰伦";    @SuppressLint("SdCardPath")    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);               new Thread(){        public void run() {          String lrcURL = OnlineLrcUtil.getLrcURL(mMusicName, mMusicAutor);                          Log.i("INFO", lrcURL+"lrcURL");                 //开始缓存歌词                 boolean b = OnlineLrcUtil.wrtieContentFromUrl(lrcURL, OnlineLrcUtil.getLrcPath(mMusicName, mMusicAutor));                 Log.i("INFO", "缓存歌词"+b);                 Log.i("INFO", OnlineLrcUtil.getLrcPath(mMusicName, mMusicAutor)+"地址");                                  LrcProcess lrcP=new LrcProcess();                 lrcP.readLRC(OnlineLrcUtil.getLrcPath(mMusicName, mMusicAutor));                 Log.i("INFO", "歌词"+lrcP.getLrcList().size());        };        }.start();           }

最后附上源码下载地址：

http://download.csdn.net/detail/u014608640/9575221

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