我需要Android中mp3播放器的示例代码才能播放多个文件。 即歌曲应该从我们系统中的特定文件夹中依次播放。
任何人都可以发布一些示例代码吗？
答案 0 :(得分：5)
基本开始的好教程
Android开发人员参考
答案 1 :(得分：2)
一个完整的MP3播放器，可以集成到您的项目中： github.com/avafab/URLMediaPlayer
答案 2 :(得分：1)
简单功能的媒体播放器，具有大部分功能，
类代表歌曲
private class SongDetails {
String songTitle = "";
String songArtist = "";
//song location on the device
String songData = "";
}
将所有媒体文件标记为mp3并将其添加到数组
的函数private void getAllSongs()
{
//creating selection for the database
String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";
final String[] projection = new String[] {
MediaStore.Audio.Media.DISPLAY_NAME,
MediaStore.Audio.Media.ARTIST,
MediaStore.Audio.Media.DATA};
//creating sort by for database
final String sortOrder = MediaStore.Audio.AudioColumns.TITLE
+ " COLLATE LOCALIZED ASC";
//stating pointer
Cursor cursor = null;
try {
//the table for query
Uri uri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
// query the db
cursor = getBaseContext().getContentResolver().query(uri,
projection, selection, null, sortOrder);
if (cursor != null) {
//create array for incoming songs
songs = new ArrayList<SongDetails>(cursor.getCount());
//go to the first row
cursor.moveToFirst();
SongDetails details;
while (!cursor.isAfterLast()) {
//collecting song information and store in array,
//moving to the next row
details = new SongDetails();
details.songTitle = cursor.getString(0);
details.songArtist = cursor.getString(1);
details.songData = cursor.getString(2);
songs.add(details);
cursor.moveToNext();
}
}
} catch (Exception ex) {
} finally {
if (cursor != null) {
cursor.close();
}
}
}
播放器与活动之间的共享界面
public interface OnPlayerEventListener {
void onPlayerComplete();
void onPlayerStart(String Title,int songDuration,int songPosition);
}
类代表媒体播放器
public class simplePlayer
{
OnPlayerEventListener mListener;
Activity mActivity;
//give access to the gui
public ArrayList<songDetails> songs = null;
public boolean isPaused = false;
public int currentPosition = 0;
public int currentDuration = 0;
//single instance
public static MediaPlayer player;
//getting gui player interface
public simplePlayer(Activity ma)
{
mActivity = ma;
mListener = (OnPlayerEventListener) mActivity;
}
//initialize the player
public void init(ArrayList<songDetails>_songs)
{
songs = _songs;
currentPosition = 0;
if(player == null)
{
player = new MediaPlayer();
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
player.stop();
player.reset();
nextSong();
mListener.onPlayerSongComplete();
}
});
}
}
//stop the current song
public void stop()
{
if(player != null)
{
if(player.isPlaying())
//stop music
player.stop();
//reset pointer
player.reset();
}
}
//pause the current song
public void pause()
{
if(!isPaused && player != null)
{
player.pause();
isPaused = true;
}
}
//playing the current song
public void play()
{
if(player != null)
{
if(!isPaused && !player.isPlaying())
{
if(songs != null)
{
if(songs.size() > 0)
{
try {
//getting file path from data
Uri u = Uri.fromFile(new File(songs.get(currentPosition).songData));
//set player file
player.setDataSource(mActivity,u);
//loading the file
player.prepare();
//getting song total time in milliseconds
currentDuration = player.getDuration();
//start playing music!
player.start();
mListener.onPlayerSongStart("Now Playing: "
+ songs.get(currentPosition).songArtist
+ " - "+ songs.get(currentPosition).songTitle
,currentDuration,currentPosition);
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}
else
{
//continue playing, reset the flag
player.start();
isPaused = false;
}
}
}
}
//playing the next song in the array
public void nextSong()
{
if(player != null)
{
if(isPaused)
isPaused = false;
if(player.isPlaying())
player.stop();
player.reset();
if((currentPosition + 1) == songs.size())
currentPosition = 0;
else
currentPosition = currentPosition + 1;
play();
}
}
//playing the previous song in the array
public void previousSong()
{
if(player != null)
{
if(isPaused)
isPaused = false;
if(player.isPlaying())
player.stop();
player.reset();
if(currentPosition - 1 < 0)
currentPosition = songs.size();
else
currentPosition = currentPosition -1;
play();
}
}
//getting new position for playing by the gui seek bar
public void setSeekPosition(int msec)
{
if(player != null)
player.seekTo(msec);
}
//getting the current duration of music
public int getSeekPosition()
{
if(player != null)
return player.getDuration();
else
return -1;
}
}
类代表主要活动
public class MainActivity extends ActionBarActivity
implements OnPlayerEventListener {
simplePlayer player;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//getting all songs in the device
getAllSongs();
if (player == null) {
//create new instance and send the listener
player = new simplePlayer(this);
//initialize the simplePlayer
player.init(songs);
//start playing the first song
player.play();
seekBar.setMax(player.currentDuration);
}
}
@Override
public void onPlayerSongComplete() {
//need to be implement!
}
@Override
public void onPlayerSongStart(String Title, int songDuration, int songPosition) {
this.setTitle(Title);
seekBar.setMax(songDuration);
seekBar.setProgress(0);
}
}
答案 3 :(得分：0)
您也可以查看Android附带的音乐播放器的源代码。 https://android.googlesource.com/platform/packages/apps/Music/
答案 4 :(得分：0)
在某些时候，当你在Android上播放音乐时，你将不得不处理这个问题。
http://developer.android.com/reference/android/media/MediaPlayer.html
答案 5 :(得分：0)
这是一个易于理解的mp3播放器的一个很好的例子：https://github.com/saquibhafiz/MP3Player
或者如果你更喜欢tutorail：