一个完整android音乐播放器源码

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();// 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:drawable="@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_play"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，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"?><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: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_seekbar_bg"android:dither="true"></item><item android:id="@android:id/secondaryProgress"><clip><shape><gradientandroid:startColor="#80028ac8"android:centerColor="#80127fb1"android:centerY="0.75"android:endColor="#a004638f"android:angle="270"/></shape></clip></item><itemandroid:id="@android:id/progress"android:drawable="@drawable/seekbar_progress_bg"/></layer-list>(4.3)实际的Seekbar控件定义如下：<SeekBarandroid:id="@+id/songProgressBar"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"android: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 xmlns:android=""android:layout_width="match_parent"android:layout_height="match_parent"android:background="@color/player_background"><!-- Player Header --><LinearLayoutandroid:id="@+id/player_header_bg"android:layout_width="fill_parent"android:layout_height="60dip"android:background="@layout/bg_player_header"android:layout_alignParentTop="true"android:paddingLeft="5dp"android:paddingRight="5dp"><!-- Song Title --><TextViewandroid:id="@+id/songTitle"android: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, The Bad And The Ugly"android:layout_marginTop="10dp"/><!-- Playlist button --><ImageButtonandroid:id="@+id/btnPlaylist"android:layout_width="wrap_content"android:layout_height="fill_parent"android:src="@drawable/btn_playlist"android:background="@null"/></LinearLayout><!-- Song Thumbnail Image --><LinearLayoutandroid:id="@+id/songThumbnail"android:layout_width="fill_parent"android:layout_height="wrap_content"android:paddingTop="10dp"android:paddingBottom="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 Footer --><LinearLayoutandroid: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"><!-- Player Buttons --><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="horizontal"android:gravity="center_vertical"android:background="@layout/rounded_corner"android:paddingLeft="10dp"android:paddingRight="10dp"><!-- Previous Button --><ImageButtonandroid:id="@+id/btnPrevious"android:src="@drawable/btn_previous"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@null"/><!-- Backward Button --><ImageButtonandroid:id="@+id/btnBackward"android:src="@drawable/btn_backward"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@null"/><!-- Play Button --><ImageButtonandroid:id="@+id/btnPlay"android:src="@drawable/btn_play"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@null"/><!-- Forward Button --><ImageButtonandroid:id="@+id/btnForward"android:src="@drawable/btn_forward"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@null"/><!-- Next Button --><ImageButtonandroid:id="@+id/btnNext"android:src="@drawable/btn_next"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@null"/></LinearLayout></LinearLayout><!-- Progress Bar/Seek bar --><SeekBarandroid:id="@+id/songProgressBar"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"android:thumb="@drawable/seek_handler"android:progressDrawable="@drawable/seekbar_progress"android:paddingLeft="6dp"android:paddingRight="6dp"/><!-- Timer Display --><LinearLayoutandroid:id="@+id/timerDisplay"android:layout_above="@id/songProgressBar"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_marginRight="20dp"android:layout_marginLeft="20dp"android:layout_marginBottom="10dp"><!-- Current Duration Label --><TextViewandroid:id="@+id/songCurrentDurationLabel"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 --><TextViewandroid: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"/></LinearLayout><!-- Repeat / Shuffle buttons --><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_above="@id/timerDisplay"android:gravity="center"><!-- Repeat Button --><ImageButtonandroid:id="@+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 --><ImageButtonandroid: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 --><itemandroid:state_selected="false"android:state_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="@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="vertical"><ListViewandroid: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" /></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_parent"android:orientation="vertical"android:gravity="center"android:background="@drawable/list_selector"android:padding="5dp"><TextViewandroid:id="@+id/songTitle"android:layout_width="fill_parent"android:layout_height="wrap_content"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，这个类用于扫描设备中所有.mp3文件，SongsManager.mp3public class SongsManager {// SDCard Pathfinal String MEDIA_PATH = new String("/sdcard/");private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();// Constructorpublic SongsManager(){}/*** Function to read all mp3 files from sdcard* and store the details in ArrayList* */public ArrayList<HashMap<String, String>> getPlayList(){= new );if (home.listFiles(new ()).length > 0) {for ( : home.listFiles(new ())) {HashMap<String, String> song = new HashMap<String, String>();song.put("songTitle", ().substring(0, (().length() - 4)));song.put("songPath", ());// Adding each song to SongListsongsList.add(song);}}// return songs list 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;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.widget.ListView;import android.widget.SimpleAdapter;public class PlayListActivity extends ListActivity {// Songs listpublic ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.playlist);ArrayList<HashMap<String, String>> songsListData = new ArrayList<HashMap<String, String>>();SongsManager plm = new SongsManager();// get all songs from sdcardthis.songsList = plm.getPlayList();// looping through playlistfor (int i = 0; i < songsList.size(); i++) {// creating new HashMapHashMap<String, String> song = songsList.get(i);// adding HashList to ArrayListsongsListData.add(song);}// Adding menuItems to ListViewListAdapter adapter = new SimpleAdapter(this, songsListData,yout.playlist_item, new String[] { "songTitle" }, new int[] {R.id.songTitle });setListAdapter(adapter);// selecting single ListView itemListView lv = getListView();// listening to single listitem clicklv.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(),AndroidBuildingMusicPlayerActivity.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 AndroidBuildingMusicPlayerActivity 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 ImageButton 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 mHandler = new Handler();;private SongsManager songManager;private Utilities utils;private int seekForwardTime = 5000; // 5000 millisecondsprivate int seekBackwardTime = 5000; // 5000 millisecondsprivate int currentSongIndex = 0;private boolean isShuffle = false;private boolean isRepeat = false;private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.player);// 所有的播放按钮btnPlay = (ImageButton) findViewById(R.id.btnPlay);btnForward = (ImageButton)findViewById(R.id.btnForward);btnBackward = (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 = (ImageButton)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.songTotalDurationLabel);// Mediaplayermp = new MediaPlayer();songManager = new SongsManager();utils = new Utilities();// ListenerssongProgressBar.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);/*** 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() {@Overridepublic void onClick(View arg0) {// check for already playingif(mp.isPlaying()){if(mp!=null){mp.pause();// Changing button image to play buttonbtnPlay.setImageResou rce(R.drawable.btn_play);}}else{// Resume songif(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(newView.OnClickListener() {@Overridepublic void onClick(View arg0) {// get current song positionint currentPosition =mp.getCurrentPosition();// check if seekForward time is lesser than song durationif(currentPosition + seekForwardTime <= mp.getDuration()){// forward songmp.seekTo(currentPosition + seekForwardTime);}else{// forward to end positionmp.seekTo(mp.getDuration());}}});/*** Backward button click event* Backward song to specified seconds* */btnBackward.setOnClickListener(newView.OnClickListener() {@Overridepublic void onClick(View arg0) {// get current song positionint currentPosition =mp.getCurrentPosition();// check if seekBackward time is greater than 0 secif(currentPosition - seekBackwardTime >= 0){// forward songmp.seekTo(currentPosition - seekBackwardTime);}else{// backward to starting positionmp.seekTo(0);}}});/*** Next button click event*点击后一首歌事件* */btnNext.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// check if next song is there or notif(currentSongIndex < (songsList.size() - 1)){playSong(currentSongIndex + 1);currentSongIndex = currentSongIndex + 1;}else{// play first songplaySong(0);currentSongIndex = 0;}}});/*** 单击:前一首按钮事件* */btnPrevious.setOnClickListener(newView.OnClickListener() {@Overridepublic void onClick(View arg0) {if(currentSongIndex > 0){playSong(currentSongIndex - 1);currentSongIndex = currentSongIndex - 1;}else{// play last songplaySong(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.setImageResource(R. drawable.btn_repeat);}else{// make repeat to trueisRepeat = true;Toast.makeText(getApplication Context(), "Repeat is ON", Toast.LENGTH_SHORT).show();// make shuffle to falseisShuffle = false;btnRepeat.setImageResource(R. drawable.btn_repeat_focused);btnShuffle.setImageResource(R .drawable.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 trueisShuffle= true;Toast.makeText(getApplication Context(), "Shuffle is ON", Toast.LENGTH_SHORT).show();// make shuffle to falseisRepeat = false;btnShuffle.setImageResource(R .drawable.btn_shuffle_focused);btnRepeat.setImageResource(R. drawable.btn_repeat);}}});/*** Button Click event for Play list click event* Launches list activity which displays list of songs* */btnPlaylist.setOnClickListener(newView.OnClickListener() {@Overridepublic void onClick(View arg0) {Intent i = newIntent(getApplicationContext(), PlayListActivity.class);startActivityForResult(i, 100);}});}/*** Receiving song index from playlist view* and play the song* */@Overrideprotected void onActivityResult(int requestCode,int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if(resultCode == 100){currentSongIndex =data.getExtras().getInt("songIndex");// play selected songplaySong(currentSongIndex);}}/*** Function to play a song* @param songIndex - index of song* */public void playSong(int songIndex){// Play songtry {mp.reset();mp.setDataSource(songsList.get(songIndex).get ("songPath"));mp.prepare();mp.start();// Displaying Song titleString songTitle =songsList.get(songIndex).get("songTitle");songTitleLabel.setText(songTitle);// Changing Button Image to pause imagebtnPlay.setImageResource(R.drawable.btn_pause );// set Progress bar valuessongProgressBar.setProgress(0);songProgressBar.setMax(100);// Updating progress barupdateProgressBar();} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}/*** Update timer on seekbar* */public void updateProgressBar() {mHandler.postDelayed(mUpdateTimeTask, 100);}/*** Background Runnable thread* */private Runnable mUpdateTimeTask = new Runnable() {public void run() {long totalDuration = mp.getDuration();long currentDuration =mp.getCurrentPosition();// Displaying Total Duration timesongTotalDurationLabel.setText(""+utils .milliSecondsToTimer(totalDuration));// Displaying time completed playingsongCurrentDurationLabel.setText(""+uti liSecondsToTimer(currentDuration));// Updating progress barint progress =(int)(utils.getProgressPercentage(currentDuration, totalDuration));//Log.d("Progress", ""+progress);songProgressBar.setProgress(progress);// Running this thread after 100 millisecondsmHandler.postDelayed(this, 100);}};/**** */@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {}/*** When user starts moving the progress handler* */@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {// remove message Handler from updating progress barmHandler.removeCallbacks(mUpdateTimeTask);}/*** When user stops moving the progress hanlder* */@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {mHandler.removeCallbacks(mUpdateTimeTask);int totalDuration = mp.getDuration();int currentPosition =utils.progressToTimer(seekBar.getProgress(), totalDuration);// forward or backward to certain secondsmp.seekTo(currentPosition);// update timer progress againupdateProgressBar();}/*** On Song Playing completed* if repeat is ON play same song again* if shuffle is ON play random song* */@Overridepublic void onCompletion(MediaPlayer arg0) {// check for repeat is ON or OFFif(isRepeat){// repeat is on play same song againplaySong(currentSongIndex);} else if(isShuffle){// shuffle is on - play a random songRandom rand = new Random();currentSongIndex =rand.nextInt((songsList.size() - 1) - 0 + 1) + 0;playSong(currentSongIndex);} else{// no repeat or shuffle ON - play next songif(currentSongIndex < (songsList.size() - 1)){playSong(currentSongIndex + 1);currentSongIndex = currentSongIndex + 1;}else{// play first songplaySong(0);currentSongIndex = 0;}}}@Overridepublic void onDestroy(){super.onDestroy();mp.release();}}10：项目的功能配置文件AndroidManifest.xmlAndroidManifest.xml<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android=""package="com.androidhive.musicplayer"android:versionCode="1"android:versionName="1.0" ><uses-sdk android:minSdkVersion="8" /><applicationandroid:icon="@drawable/ic_launcher"android:label="@string/app_name" ><activityandroid:name=".AndroidBuildingMusicPlayerActivity"android:label="@string/app_name"android:configChanges="keyboardHidden|orientation"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="UNCHER" /> </intent-filter></activity><activityandroid:name=".PlayListActivity" /></application></manifest>。