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SDCARD上的.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()

2、; / 复位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 Backwardmp.seekTo(positon); / position in milliseconds / 检测歌曲是否正在播放mp.isPlaying(); / returns true or false1：音乐播放器的界面：播放器界面中所用的一些布局图片，这些图片大家可以到android SDK文件夹下或是到网络中去寻找一些类

3、似就可以，并不一定要这些图片，代码才是我们的关键，3：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<selector xmlns:android=" <item android:drawable="drawable/img_btn_play_pressed" android:state_focused="true" android:state_pressed="true" /> <item android:d

4、rawable="drawable/img_btn_play_pressed" android:state_focused="false" android:state_pressed="true" /> <item android:drawable="drawable/img_btn_play_pressed" android:state_focused="true" /> <item android:drawable="drawable/img_btn_pla

5、y" android:state_focused="false" android:state_pressed="false" /></selector>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，d 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.xml<?xml version="1.0" encoding="utf-8"?&g

6、t; <layer-list xmlns:android=" <item> <clip> <bitmap xmlns:android=" android:src="drawable/img_seekbar_progress_blue" android:tileMode="repeat" android:antialias="true" android:dither="false" android:filter="false" android

7、:gravity="left" /> </clip> </item>(4.2)Changing SeekBar Progress:seekbar_progress.xml<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android=" <item android:id="android:id/background" android:drawable="drawable/img_

8、seekbar_bg" android:dither="true"> </item> <item android:id="android:id/secondaryProgress"> <clip> <shape> <gradient android:startColor="#80028ac8" android:centerColor="#80127fb1" android:centerY="0.75" android:endC

9、olor="#a004638f" android:angle="270" /> </shape> </clip> </item> <item android:id="android:id/progress" android:drawable="drawable/seekbar_progress_bg" /></layer-list>(4.3)实际的Seekbar控件定义如下 ：<SeekBar android:id="+id/song

10、ProgressBar" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginRight="20dp" android:layout_marginLeft="20dp" android:layout_marginBottom="20dp" android:layout_above="id/player_footer_bg" andro

11、id:thumb="drawable/seek_handler" android:progressDrawable="drawable/seekbar_progress" android:paddingLeft="6dp" android:paddingRight="6dp"/>5：接下来我们将实现播放的整体界面的布局文件：player.xml<?xml version="1.0" encoding="utf-8"?><RelativeLayout x

12、mlns:android=" android:layout_width="match_parent" android:layout_height="match_parent" android:background="color/player_background"> <!- Player Header -> <LinearLayout android:id="+id/player_header_bg" android:layout_width="fill_parent&q

13、uot; android:layout_height="60dip" android:background="layout/bg_player_header" android:layout_alignParentTop="true" android:paddingLeft="5dp" android:paddingRight="5dp"> <!- Song Title -> <TextView android:id="+id/songTitle" an

14、droid:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:textColor="#04b3d2" android:textSize="16dp" android:paddingLeft="10dp" android:textStyle="bold" android:text="The Good,

15、The Bad And The Ugly" android:layout_marginTop="10dp"/> <!- Playlist button -> <ImageButton android:id="+id/btnPlaylist" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="drawable/btn_playlist" andr

16、oid:background="null"/> </LinearLayout> <!- Song Thumbnail Image -> <LinearLayout android:id="+id/songThumbnail" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="10dp" android:paddingBottom

17、="10dp" android:gravity="center" android:layout_below="id/player_header_bg"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="drawable/adele"/> </LinearLayout> <!- Player Foo

18、ter -> <LinearLayout android:id="+id/player_footer_bg" android:layout_width="fill_parent" android:layout_height="100dp" android:layout_alignParentBottom="true" android:background="layout/bg_player_footer" android:gravity="center">

19、<!- Player Buttons -> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal" android:gravity="center_vertical" android:background="layout/rounded_corner" android:paddingLeft=&q

20、uot;10dp" android:paddingRight="10dp"> <!- Previous Button -> <ImageButton android:id="+id/btnPrevious" android:src="drawable/btn_previous" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background=&

21、quot;null"/> <!- Backward Button -> <ImageButton android:id="+id/btnBackward" android:src="drawable/btn_backward" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="null"/> <!- Play But

22、ton -> <ImageButton android:id="+id/btnPlay" android:src="drawable/btn_play" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="null"/> <!- Forward Button -> <ImageButton android:id="+i

23、d/btnForward" android:src="drawable/btn_forward" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="null"/> <!- Next Button -> <ImageButton android:id="+id/btnNext" android:src="drawable

24、/btn_next" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="null"/> </LinearLayout> </LinearLayout> <!- Progress Bar/Seek bar -> <SeekBar android:id="+id/songProgressBar" android:layout_w

25、idth="fill_parent" android:layout_height="wrap_content" android:layout_marginRight="20dp" android:layout_marginLeft="20dp" android:layout_marginBottom="20dp" android:layout_above="id/player_footer_bg" android:thumb="drawable/seek_handl

26、er" android:progressDrawable="drawable/seekbar_progress" android:paddingLeft="6dp" android:paddingRight="6dp"/> <!- Timer Display -> <LinearLayout android:id="+id/timerDisplay" android:layout_above="id/songProgressBar" android:layout

27、_width="fill_parent" android:layout_height="wrap_content" android:layout_marginRight="20dp" android:layout_marginLeft="20dp" android:layout_marginBottom="10dp"> <!- Current Duration Label -> <TextView android:id="+id/songCurrentDurat

28、ionLabel" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="left" android:textColor="#eeeeee" android:textStyle="bold"/> <!- Total Duration Label -> <TextView

29、 android:id="+id/songTotalDurationLabel" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="right" android:textColor="#04cbde" android:textStyle="bold"/> </Line

30、arLayout> <!- Repeat / Shuffle buttons -> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_above="id/timerDisplay" android:gravity="center"> <!- Repeat Button -> <ImageButton android:i

31、d="+id/btnRepeat" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="drawable/btn_repeat" android:layout_marginRight="5dp" android:background="null"/> <!- Shuffle Button -> <ImageButton android

32、:id="+id/btnShuffle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="drawable/btn_shuffle" android:layout_marginLeft="5dp" android:background="null"/> </LinearLayout></RelativeLayout>6：有了

33、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<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="<!- Selector style for listrow -><item android:state_selected="false" android:state_

34、pressed="false" android:drawable="drawable/gradient_bg" /><item android:state_pressed="true" android:drawable="drawable/gradient_bg_hover" /><item android:state_selected="true" android:state_pressed="false" android:drawable=&quo

35、t;drawable/gradient_bg_hover" /></selector>歌曲列表界面布局文件：playlist.xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android=" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="v

36、ertical"> <ListView android:id="android:id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:divider="#242424" android:dividerHeight="1dp" android:listSelector="drawable/list_selector" /> <

37、;/LinearLayout>listviewr的item界面布局，用于定义单个歌曲的显示界面：playlist_item.xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="    android:layout_width="match_parent"    android:layout_height="match_pare

38、nt"    android:orientation="vertical"    android:gravity="center"    android:background="drawable/list_selector"    android:padding="5dp">    <TextVi

39、ew        android:id="+id/songTitle"        android:layout_width="fill_parent"        android:layout_height="wrap_content"    

40、0;   android:textSize="16dp"        android:padding="10dp"        android:color="#f3f3f3"/></LinearLayout>歌曲列表界面图：7：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.java类

41、，这个类用于扫描设备中所有.mp3文件，SongsManager.mp3public class SongsManager / SDCard Path final String MEDIA_PATH = new String("/sdcard/"); private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>(); / Constructor public SongsManager() /* * Fu

42、nction to read all mp3 files from sdcard * and store the details in ArrayList * */ public ArrayList<HashMap<String, String>> getPlayList() File home = new File(MEDIA_PATH); if (home.listFiles(new FileExtensionFilter().length > 0) for (File file : home.listFiles(new FileExtensionFilter

43、() HashMap<String, String> song = new HashMap<String, String>(); song.put("songTitle", file.getName().substring(0, (file.getName().length() - 4); song.put("songPath", file.getPath(); / Adding each song to SongList songsList.add(song); / return songs list array return

44、songsList; /* * Class to filter files which are having .mp3 extension * */ class FileExtensionFilter implements FilenameFilter public boolean accept(File dir, 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，P

45、layListActivity.javapackage com.androidhive.musicplayer; 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.OnItemClic

46、kListener;import android.widget.ListAdapter;import android.widget.ListView;import android.widget.SimpleAdapter; public class PlayListActivity extends ListActivity / Songs list public ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>(); Over

47、ride public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.playlist); ArrayList<HashMap<String, String>> songsListData = new ArrayList<HashMap<String, String>>(); SongsManager plm = new SongsManager(); / get all songs from

48、 sdcard this.songsList = plm.getPlayList(); / looping through playlist for (int i = 0; i < songsList.size(); i+) / creating new HashMap HashMap<String, String> song = songsList.get(i); / adding HashList to ArrayList songsListData.add(song); / Adding menuItems to ListView ListAdapter adapter

49、 = 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 single listitem click lv.setOnItemClickListener(new OnItemClickListener

50、() Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) / getting listitem index int songIndex = position; / Starting new intent Intent in = new Intent(getApplicationContext(), AndroidBuildingMusicPlayerActivity.class); / Sending songIndex to PlayerActivity

51、 in.putExtra("songIndex", songIndex); setResult(100, in); / Closing PlayListView finish(); ); 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 AndroidBuildingMusicPlayerActivity extends Activity

52、 implements OnCompletionListener, SeekBar.OnSeekBarChangeListener      private ImageButton btnPlay;    private ImageButton btnForward;    private ImageButton btnBackward;    private ImageButton btnNext;  &

53、#160; private ImageButton btnPrevious;    private ImageButton btnPlaylist;    private ImageButton btnRepeat;    private ImageButton btnShuffle;    private SeekBar songProgressBar;    private Text

54、View songTitleLabel;    private TextView songCurrentDurationLabel;    private TextView songTotalDurationLabel;    / Media Player    private  MediaPlayer mp;    / Handler to update UI timer, progr

55、ess bar etc,.    private Handler mHandler = new Handler();    private SongsManager songManager;    private Utilities utils;    private int seekForwardTime = 5000; / 5000 milliseconds    private int se

56、ekBackwardTime = 5000; / 5000 milliseconds    private int currentSongIndex = 0;    private boolean isShuffle = false;    private boolean isRepeat = false;    private ArrayList<HashMap<String, String>> songsLi

57、st = new ArrayList<HashMap<String, String>>();     Override    public void onCreate(Bundle savedInstanceState)         super.onCreate(savedInstanceState);        s

58、etContentView(R.layout.player);         / 所有的播放按钮        btnPlay = (ImageButton) findViewById(R.id.btnPlay);        btnForward = (ImageButton) findViewById(R.id.btnForward);&#

59、160;       btnBackward = (ImageButton) findViewById(R.id.btnBackward);        btnNext = (ImageButton) findViewById(R.id.btnNext);        btnPrevious = (ImageButton) findViewById(R.id.bt

60、nPrevious);        btnPlaylist = (ImageButton) findViewById(R.id.btnPlaylist);        btnRepeat = (ImageButton) findViewById(R.id.btnRepeat);        btnShuffle = (ImageButton) find

61、ViewById(R.id.btnShuffle);        songProgressBar = (SeekBar) findViewById(R.id.songProgressBar);        songTitleLabel = (TextView) findViewById(R.id.songTitle);        songCurren

62、tDurationLabel = (TextView) findViewById(R.id.songCurrentDurationLabel);        songTotalDurationLabel = (TextView) findViewById(R.id.songTotalDurationLabel);         / Mediaplayer      

63、;  mp = new MediaPlayer();        songManager = new SongsManager();        utils = new Utilities();         / Listeners       

64、0;songProgressBar.setOnSeekBarChangeListener(this); / Important        mp.setOnCompletionListener(this); / Important         / 获取所有歌曲列表        songsList = songManager.getPlayL

65、ist();         / 默认从第一首开始播放        playSong(0);         /*         * Play button click event         * plays a song and changes button to pause image         * pauses a song and changes button to play image         * */