Android开发本地及网络Mp3音乐播放器(十五)网络音乐及歌词下载功能实现

实现功能：

实现网络音乐歌词下载功能(下载音乐的同时，下载对应歌词)

下载好的歌词目前不在播放器内，可以通过文件浏览器查看。

后续将博文，将实现本地音乐歌词下载和已下载音乐扫描功能。

因为，没有自己的服务器，所以网络音乐所有相关功能(包含搜索音乐、下载音乐、下载歌词)均无法保证时效性，建议，尽快下载和练习；如果你下载时候，已经因为我采集的服务器更改规则，请给我留言，如果可以解决，我将在有空的时候献上新的源码。

截止到目前的源码下载：
http://download.csdn.net/album/detail/3105
(最新的，请下载最后一个，本博文对应版本2.0；歌词下载只修改了DownloadUtils，所以下载1.9，修改一下DownloadUtils，也是可以的；如果需要逐步实现的过程，请下载所有)

欢迎移动开发爱好者交流：我的微信是iwanghang

另外，我打算开始找工作，如果沈阳或周边城市公司有意，也请与我联系。

实现效果如图：







实现代码如下：

DownloadUtils如下：

package com.iwanghang.drmplayer.utils;

import android.os.Environment;
import android.os.Handler;
import android.os.Message;

import com.iwanghang.drmplayer.vo.SearchResult;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import javax.xml.parsers.ParserConfigurationException;

/**
* Created by iwanghang on 16/5/3.
* 网络音乐下载工具类
*/
public class DownloadUtils {

private static final String DOWNLOAD_URL = "/download?_o=%2Fsearch%2Fsong";
private static final int SUCCESS_LRC = 1;//下载歌词成功
private static final int FAILED_LRC = 2;//下载歌词失败
private static final int SUCCESS_MP3 = 3;//下载歌曲成功
private static final int FAILED_MP3 = 4;//下载歌曲失败
private static final int GET_MP3_URL = 5;//获取音乐下载地址成功
private static final int GET_FAILED_MP3_URL = 6;//获取音乐下载地址失败
private static final int MUSIC_EXISTS = 7;//下载时,音乐已存在

private static DownloadUtils sInstance;
private OnDownloadListener mListener;

private ExecutorService mThreadPool;

/**
*设置回调监听器对象
* @param mListener
* @return
*/
public DownloadUtils setListener(OnDownloadListener mListener){
this.mListener = mListener;
return this;
}

//获取下载工具的实例
public synchronized static DownloadUtils getsInstance(){
if (sInstance == null){
try {
sInstance = new DownloadUtils();
} catch (ParserConfigurationException e) {
e.printStackTrace();
}
}
return  sInstance;
}

/**
* 下载的具体业务方法
* @throws ParserConfigurationException
*/
private DownloadUtils() throws ParserConfigurationException{
mThreadPool = Executors.newSingleThreadExecutor();
}

public void download(final SearchResult searchResult){
final Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
switch (msg.what){
case SUCCESS_LRC:
if (mListener != null) mListener.onDowload("歌词下载成功");
break;
case FAILED_LRC:
if (mListener != null) mListener.onFailed("歌词下载失败");
break;
case GET_MP3_URL:
System.out.println("GET_MP3_URL:"+msg.obj);
downloadMusic(searchResult,(String)msg.obj,this);
break;
case GET_FAILED_MP3_URL:
if (mListener != null) mListener.onFailed("下载失败,该歌曲为收费或VIP类型");
break;
case SUCCESS_MP3:
if (mListener != null) mListener.onDowload(searchResult.getMusicName()+"已经下载");
String url = Constant.MIGU_URL + searchResult.getUrl();
System.out.println("download lrc:"+url);
downloadLRC(url,searchResult.getMusicName(),searchResult.getArtist(),this);
break;
case FAILED_MP3:
if (mListener != null) mListener.onFailed(searchResult.getMusicName()+"下载失败");
break;
case MUSIC_EXISTS:
if (mListener != null) mListener.onFailed("音乐已存在");
break;
}
}
};
getDownloadMusicURL(searchResult,handler);
}

//获取下载歌词的URL
private void getDownloadLrcURL(final SearchResult searchResult, final Handler handler) {
mThreadPool.execute(new Runnable() {
@Override
public void run() {
//http://music.baidu.com/search/lrc?key=%E6%9C%89%E5%BF%83%E4%BA%BA%20G.E.M.%E9%82%93%E7%B4%AB%E6%A3%8B
//"http://music.baidu.com/search/lrc?key=" + 歌名 + " " + 歌手
//System.out.println("searchResult.getUrl() = " + searchResult.getUrl());
//String[] aa = searchResult.getUrl().split("/");
//String sn = aa[5];
//System.out.println("歌曲编号 = " + sn);

//从浏览器复制出来的Url是这样的,"http://music.baidu.com/search?key=%E6%B2%A1%E6%9C%89";
//汉字经过utf8编码,比如 冰雨 == %E5%86%B0%E9%9B%A8;
//经过测试 获取页面 使用"http://music.baidu.com/search?key=冰雨";无法打开正确连接
//比如使用URLEncoder.encode转码,转为utf8
//实际使用 获取页面 使用"http://music.baidu.com/search?key=%E6%B2%A1%E6%9C%89";
try {
String musicName = URLEncoder.encode(searchResult.getMusicName(), "utf8");
String artistName = URLEncoder.encode(searchResult.getArtist(), "utf8");
//String url = Constant.BAIDU_LRC_SEARCH_HEAD + searchResult.getMusicName() + " " + searchResult.getArtist();
String url = Constant.BAIDU_LRC_SEARCH_HEAD + musicName + "+" + artistName;
System.out.println("歌词下载页面url = " + url);

Document doc = Jsoup.connect(url).userAgent(Constant.USER_AGENT).timeout(6000).get();
//System.out.println("歌词下载页面 doc : " + doc);

Elements lrcUrls = doc.select("span.lyric-action");
System.out.println(lrcUrls);

for (int i=0;i<lrcUrls.size();i++) {
Elements urlsa = lrcUrls.get(i).getElementsByTag("a");
System.out.println("tag a urlsa : " + urlsa);
for (int a=0;i<urlsa.size();a++) {
System.out.println("----" + urlsa.get(a).toString());
String urla = urlsa.get(a).toString();
System.out.println("-----" + urla);
//-----<a class="down-lrc-btn { 'href':'/data2/lrc/14488216/14488216.lrc' }" href="#">下载LRC歌词</a>
if (urla.indexOf("'href':'")>0){
String[] uu = urla.split("'href':'");
System.out.println("uu1 : " + uu[1]);
//uu1 : /data2/lrc/14488216/14488216.lrc' }" href="#">下载LRC歌词</a>
String[] uuu = uu[1].split(".lrc");
System.out.println("uuu0 : " + uuu[0]);
//uuu0 : /data2/lrc/14488216/14488216
String result = "http://music.baidu.com" + uuu[0] + ".lrc";
System.out.println("result : " + result);
//result :  http://music.baidu.com/data2/lrc/14488216/14488216.lrc Message msg = handler.obtainMessage(SUCCESS_LRC,result);
msg.sendToTarget();
break;
}
}
}
} catch (IOException e) {
e.printStackTrace();
handler.obtainMessage(FAILED_LRC).sendToTarget();
}

}
});
}

//获取下载音乐的URL
private void getDownloadMusicURL(final SearchResult searchResult, final Handler handler) {
mThreadPool.execute(new Runnable() {
@Override
public void run() {
//http://music.migu.cn/#/album/1003215276
//1003215279
//http://music.migu.cn/order/1003215279/down/self/P2Z3Y12L1N2/3/001002A/1003215279
System.out.println("searchResult.getUrl() = " + searchResult.getUrl());
String[] aa = searchResult.getUrl().split("/");
String sn = aa[5];
System.out.println("歌曲编号 = " + sn);
String url = Constant.MIGU_DOWN_HEAD + sn + Constant.MIGU_DOWN_FOOT;
System.out.println("歌曲下载页面url = " + url);

try {
Document doc = Jsoup.connect(url).userAgent(Constant.USER_AGENT).timeout(6000).get();
//System.out.println(doc);

System.out.println("doc.toString() = " + doc.toString());
String[] bb = doc.toString().split("song");//把 下载页面源码 按照"song"分割
for (int i=0;i<bb.length;i++){
System.out.println("bb[" + i + "] = " + bb[i]);
if (bb[i].indexOf("mp3?msisdn")>0){
System.out.println("mp3?msisdn = " + bb[i]);
String initMp3Url = bb[i];//initMp3Url 初始Mp3下载链接,如下
//mp3?msisdn = ":"http://tyst.migu.cn/public/ringmaker01/10月31日中文延期/文件/全套格式/9000首/全曲试听/Mp3_128_44_16/一起走过的日子-刘德华.mp3?msisdn\u003d7b609763f0ff","

String[] arrayHttp = initMp3Url.split("http");//把 初始Mp3下载链接 按照"http"分割
String[] arrayMp3 = arrayHttp[1].split(".mp3");//把 arrayHttp 按照".mp3"分割
String result = "http" + arrayMp3[0] + ".mp3";//把分割去掉的"http"和".mp3",组合回来
System.out.println("result");

//String result = "http://tyst.migu.cn/public/ringmaker01/10月31日中文延期/文件/全套格式/9000首/全曲试听/Mp3_128_44_16/一起走过的日子-刘德华.mp3";
Message msg = handler.obtainMessage(GET_MP3_URL,result);
msg.sendToTarget();
}
}

} catch (IOException e) {
e.printStackTrace();
handler.obtainMessage(GET_FAILED_MP3_URL).sendToTarget();
}
}
});
}

//下载歌词
private void downloadLRC(final String url, final String musicName, final String artistName,final Handler handler){
mThreadPool.execute(new Runnable() {
@Override
public void run() {

//从浏览器复制出来的Url是这样的,"http://music.baidu.com/search?key=%E6%B2%A1%E6%9C%89";
//汉字经过utf8编码,比如 冰雨 == %E5%86%B0%E9%9B%A8;
//经过测试 获取页面 使用"http://music.baidu.com/search?key=冰雨";无法打开正确连接
//比如使用URLEncoder.encode转码,转为utf8
//实际使用 获取页面 使用"http://music.baidu.com/search?key=%E6%B2%A1%E6%9C%89";
try {
String musicNameEn = URLEncoder.encode(musicName, "utf8");
String artistNameEn = URLEncoder.encode(artistName, "utf8");
//String url = Constant.BAIDU_LRC_SEARCH_HEAD + searchResult.getMusicName() + " " + searchResult.getArtist();
String url = Constant.BAIDU_LRC_SEARCH_HEAD + musicNameEn + "+" + artistNameEn;
System.out.println("歌词下载页面url = " + url);

Document doc = Jsoup.connect(url).userAgent(Constant.USER_AGENT).timeout(6000).get();
//System.out.println("歌词下载页面 doc : " + doc);

Elements lrcUrls = doc.select("span.lyric-action");
System.out.println(lrcUrls);

for (int i = 0; i < lrcUrls.size(); i++) {
Elements urlsa = lrcUrls.get(i).getElementsByTag("a");
System.out.println("tag a urlsa : " + urlsa);
for (int a = 0; a < urlsa.size(); a++) {
//System.out.println("----" + urlsa.get(a).toString());
String urla = urlsa.get(a).toString();
System.out.println("-----" + urla);
//-----<a class="down-lrc-btn { 'href':'/data2/lrc/14488216/14488216.lrc' }" href="#">下载LRC歌词</a>
if (urla.indexOf("'href':'") > 0) {
String[] uu = urla.split("'href':'");
System.out.println("uu1 : " + uu[1]);
//uu1 : /data2/lrc/14488216/14488216.lrc' }" href="#">下载LRC歌词</a>
String[] uuu = uu[1].split(".lrc'");
System.out.println("uuu0 : " + uuu[0]);
//uuu0 : /data2/lrc/246970367/246970367.lrc
String lrcDwonUrl = "http://music.baidu.com" + uuu[0] + ".lrc";
System.out.println("lrcDwonUrl : " + lrcDwonUrl);
//result :  http://music.baidu.com/data2/lrc/14488216/14488216.lrc 
File LrcDirFile = new File(Environment.getExternalStorageDirectory() + Constant.DIR_LRC);
System.out.println("LrcDirFile : " + LrcDirFile);
if (!LrcDirFile.exists()) {
LrcDirFile.mkdirs();
}
String target = LrcDirFile + "/" + musicName + ".lrc";
System.out.println("lrcDwonUrl : " + lrcDwonUrl);
System.out.println("target : " + target);
File fileTarget = new File(target);
if (fileTarget.exists()) {
handler.obtainMessage(MUSIC_EXISTS).sendToTarget();
return;
} else {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(lrcDwonUrl).build();
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
PrintStream ps = new PrintStream(new File(target));
byte[] bytes = response.body().bytes();
ps.write(bytes, 0, bytes.length);
ps.close();
handler.obtainMessage(SUCCESS_LRC, target).sendToTarget();
}
}
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}

});
}

//下载MP3
private void downloadMusic(final SearchResult searchResult,final String url,final Handler handler){
mThreadPool.execute(new Runnable() {
@Override
public void run() {
File musicDirFile = new File(Environment.getExternalStorageDirectory()+Constant.DIR_MUSIC);
if (!musicDirFile.exists()){
musicDirFile.mkdirs();
}

String mp3url = url;
//String mp3url = "http://tyst.migu.cn/public/600902-2008430/tone/2008/09/10/2008年9月/4月环球106首歌曲/彩铃/7_mp3-128kbps/等你等到我心痛-张学友.mp3";

String target = musicDirFile + "/" + searchResult.getMusicName() + ".mp3";
System.out.println(mp3url);
System.out.println(target);
File fileTarget = new File(target);
if (fileTarget.exists()){
handler.obtainMessage(MUSIC_EXISTS).sendToTarget();
return;
}else {
//使用OkHttpClient组件
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(mp3url).build();
System.out.println(request);
try {
Response response = client.newCall(request).execute();
if (response.isSuccessful()){
PrintStream ps = new PrintStream(fileTarget);
byte[] bytes = response.body().bytes();
ps.write(bytes,0,bytes.length);
ps.close();
handler.obtainMessage(SUCCESS_MP3).sendToTarget();
}
} catch (IOException e) {
e.printStackTrace();
handler.obtainMessage(FAILED_MP3).sendToTarget();
}
}
}
});
}

//自定义下载事件监听器
public interface OnDownloadListener {
public void onDowload(String mp3Url);
public void onFailed(String error);
}
}