一个完整android音乐播放器源码

1、本文出自：欢迎转载，转载请注明出自： 安卓开发网 下面将和大家一起介绍一个音乐播放器项目， 完成后的播放器具有暂停， 下一首， 前一首，歌曲列表，播放条进度等一些基本功能，它只是播放SDCARDk的.map文件，Android SDK 为我们提供了一个 MeidaPlayer 类，有了这个类我们可以很方便的创建一个 mdeiaplayer 服务，该类中具有一些方法：MediaPlayer mp = new MediaPlayer();/ 设置文件存储路径 setDataSource(/sdcard/path_to_song);/ 播放mp.start();/ 暂短mp.pause();/ 复位

2、mp.reset();/ 获取当前播放时长 mp.getDuration();/ 进度条mp.getCurrentDuration();/ Move song to particular second - used for Forward or Backward mp.seekTo(positon); / position in milliseconds/ 检测歌曲是否正在播放 mp.isPlaying(); / returns true or false 1：音乐播放器的界面：Android Build!n官 Audio Player播放器界面中所用的一些布局图片，这些图片大家可以到an d

3、roid SDK文件夹下或是到网络中去寻找一些类似就可以，并不一定要这些图片，代码才是我们的关键,AndmidAndroid Audio Player ICONSPlay DeafultPlay FocusedPause Deafult Pause FocusedBackward DefauItBackward Focused0Forward DefaultForward FocusedNext DefaultNext FocusedPrevious DefaultPrevious FocusedRepeat Default乂 Shuffle DefaultRepeat Focused2/ S

4、huffle FocusedPlaylist DefaultPlaylist FocusedSeekbar BackgroundSeekbar ProgressSeekbar Thuib3：然后我们需要写一个 XML 布局文件用于播放器的播按钮在不同状态下的图片，此 XML 文件保存在 drawable 文件夹下，btn_play.xml 提示：大家可以根据此 XML 文件完成其它的一些按钮布局文件，在这里就没有再为大家一一提供了，4：为了让播放器更绚，我们可以自定义一个 SeekBar 作为歌曲的播放进度，自定义风格代如 下：(4.1) 更换背景图片： seekbar_progress_bg

5、.xml(4.2) Changing SeekBar Progress:seekbar_progress.xml(4.3) 实际的 Seekbar 控件定义如下 ：5：接下来我们将实现播放的整体界面的布局文件： player.xml 6： 有了播放器的播放界面后，我们再将所有歌曲显示的界面实现了，播放器的歌曲列表用 的一个 listview 控件，同样我们也为该 listview 控件自定义，适合播放的整体界面风格， list_selector.xml歌曲列表界面布局文件：playlist.xmllistviewr 的 item 界面布局，用于定义单个歌曲的显示界面：playlist_item

6、.xml 歌曲列表界面图：And rold Building Andia Pla/erAr draid Build ingMusEc PlayerWhit& FlagThe Good, The Bad And The UglyMichael Jackscn Earth Songrm No AngelMunt&rFalling SkwlyEnrique rglesi Tir&d Of Being SorryEnnio Morricone - Dim lightEininefn-pace Sound7:到此为止我们在上面已经完成了该项目的所有布局文件，下面我们就来实现SongManager.jav

7、a类，这个类用于扫描设备中所有.mp3文件，Son gsMa nager.mp3public class Son gsMa nager / SDCard Pathfinal Stri ng MEDIA_PATH = new Stri ng(/sdcard/);private ArrayListHashMap songsList = new ArrayListHashMap();/ Con structorpublic Son gsMa nager()/* Fun cti on to read all mp3 files from sdcard* and store the details in

8、 ArrayList* */public ArrayListHashMap getPlayList()= new );if (home.listFiles(new ().length 0) for ( : home.listFiles(new () HashMap song = new HashMap(); song.put(songTitle, ().substring(0, ().length() - 4); song.put(songPath, ();/ Adding each song to SongListsongsList.add(song);/ return songs list

9、 arrayreturn songsList;/* Class to filter files which are having .mp3 extension* * class implements public boolean accept(, String name) return (name.endsWith(.mp3) | name.endsWith(.MP3);8：创建一个新的 Activity 类，该类用于显示在 ongsManager.java 中扫描到的所有歌曲， PlayListActivity.javapackage com.androidhive.musicplayer;

10、import java.util.ArrayList;import java.util.HashMap;import android.app.ListActivity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ListAdapter;import android

11、.widget.ListView;import android.widget.SimpleAdapter;public class PlayListActivity extends ListActivity / Songs listpublic ArrayListHashMap songsList = new ArrayListHashMap();Overridepublic void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.playlist)

12、;ArrayListHashMap songsListData = new ArrayListHashMap();SongsManager plm = new SongsManager();/ get all songs from sdcard this.songsList = plm.getPlayList();/ looping through playlistfor (int i = 0; i songsList.size(); i+) / creating new HashMap HashMap song = songsList.get(i);/ adding HashList to

13、ArrayList songsListData.add(song);/ Adding menuItems to ListViewListAdapter adapter = new SimpleAdapter(this, songsListData, R.layout.playlist_item, new String songTitle , new int R.id.songTitle );setListAdapter(adapter);/ selecting single ListView item ListView lv = getListView();/ listening to sin

14、gle listitem click lv.setOnItemClickListener(new OnItemClickListener() Overridepublic void onItemClick(AdapterView parent, View view,int position, long id) / getting listitem indexint songIndex = position;/ Starting new intentIntent in = new Intent(getApplicationContext(),AndroidBuildingMusicPlayerA

15、ctivity.class);/ Sending songIndex to PlayerActivityin.putExtra(songIndex, songIndex); setResult(100, in);/ Closing PlayListViewfinish(););9：下面我们再来实现播放的主类 AndroidBuildingMusicPlayerActivity.java: 该类主要实现功能如下：1：在歌曲列表界面点击一首歌曲进入播放界面； 2：播放，暂停，快进，复位等功能实现3：重复播放单一歌曲，随机播放等 该类的完整代码如下：public class AndroidBuild

16、ingMusicPlayerActivity extends Activity implements OnCompletionListener, SeekBar.OnSeekBarChangeListener private ImageButton btnPlay;private ImageButton btnForward;private ImageButton btnBackward;private ImageButton btnNext;private ImageButton btnPrevious;private ImageButton btnPlaylist;private Imag

17、eButton btnRepeat;private ImageButton btnShuffle;private SeekBar songProgressBar;private TextView songTitleLabel;private TextView songCurrentDurationLabel;private TextView songTotalDurationLabel;/ Media Playerprivate MediaPlayer mp;/ Handler to update UI timer, progress bar etc,.private Handler mHan

18、dler = new Handler();private SongsManager songManager;private Utilities utils;private int seekForwardTime = 5000; / 5000 milliseconds private int seekBackwardTime = 5000; / 5000 milliseconds private int currentSongIndex = 0;private boolean isShuffle = false;private boolean isRepeat = false;private A

19、rrayListHashMap songsList = new ArrayListHashMap();Overridepublic void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.player);/ 所有的播放按钮btnPlay = (ImageButton) findViewById(R.id.btnPlay); btnForward = (ImageButton) findViewById(R.id.btnForward);btnBack

20、ward = (ImageButton) findViewById(R.id.btnBackward);btnNext = (ImageButton) findViewById(R.id.btnNext); btnPrevious = (ImageButton) findViewById(R.id.btnPrevious);btnPlaylist = (ImageButton) findViewById(R.id.btnPlaylist);btnRepeat = (ImageButton) findViewById(R.id.btnRepeat);btnShuffle = (ImageButt

21、on) findViewById(R.id.btnShuffle);songProgressBar = (SeekBar) findViewById(R.id.songProgressBar);songTitleLabel = (TextView) findViewById(R.id.songTitle);songCurrentDurationLabel = (TextView) findViewById(R.id.songCurrentDurationLabel);songTotalDurationLabel = (TextView) findViewById(R.id.songTotalD

22、urationLabel);/ Mediaplayermp = new MediaPlayer(); songManager = new SongsManager(); utils = new Utilities();/ Listeners songProgressBar.setOnSeekBarChangeListener(this); / Importantmp.setOnCompletionListener(this); / Important/ 获取所有歌曲列表songsList = songManager.getPlayList();/ 默认从第一首开始播放playSong(0);*

23、 Play button click event* plays a song and changes button to pause image* pauses a song and changes button to play image * */btnPlay.setOnClickListener(new View.OnClickListener()Override public void onClick(View arg0) / check for already playing if(mp.isPlaying() if(mp!=null) mp.pause();/ Changing b

24、utton image to play buttonbtnPlay.setImageResou rce(R.drawable.btn_play);else / Resume song if(mp!=null) mp.start();/ Changing button image to pause buttonbtnPlay.setImageResou rce(R.drawable.btn_pause););Forward button click event Forwards song specified seconds */btnForward.setOnClickListener(newV

25、iew.OnClickListener() Overridepublic void onClick(View arg0) / get current song position int currentPosition =mp.getCurrentPosition();/ check if seekForward time is lesserthan song durationif(currentPosition + seekForwardTime= 0)/ forward song mp.seekTo(currentPosition -seekBackwardTime);else/ backw

26、ard to startingpositionmp.seekTo(0););* Next button click event* 点击 后一首歌事件* */btnNext.setOnClickListener(new View.OnClickListener()Override public void onClick(View arg0) / check if next song is there or not if(currentSongIndex 0) playSong(currentSongIndex -currentSongIndex =else/ play last songplay

27、Song(songsList.size() -1);currentSongIndex =songsList.size() - 1;);循环播放按钮事件*/btnRepeat.setOnClickListener(newView.OnClickListener() Overridepublic void onClick(View arg0) if(isRepeat) isRepeat = false; Toast.makeText(getApplication Context(), Repeat is OFF, Toast.LENGTH_SHORT).show();btnRepeat.setIm

28、ageResource(R. drawable.btn_repeat);else/ make repeat to true isRepeat = true; Toast.makeText(getApplication Context(), Repeat is ON, Toast.LENGTH_SHORT).show();/ make shuffle to false isShuffle = false; btnRepeat.setImageResource(R. drawable.btn_repeat_focused);btnShuffle.setImageResource(R .drawab

29、le.btn_shuffle););/*随机播放按钮事件*/btnShuffle.setOnClickListener(newView.OnClickListener() Overridepublic void onClick(View arg0) if(isShuffle) isShuffle = false; Toast.makeText(getApplication Context(), Shuffle is OFF, Toast.LENGTH_SHORT).show();btnShuffle.setImageResource(R .drawable.btn_shuffle);else/ make repeat to true isShuffle= true;Toast.makeText(getApplication Context(), S