import java.io.File
import java.io.FilenameFilter
import java.util.ArrayList
import java.util.List
import android.app.Activity
import android.app.AlertDialog
import android.content.DialogInterface
import android.content.Intent
import android.media.MediaPlayer
import android.os.Bundle
import android.view.KeyEvent
import android.view.View
import android.view.View.OnClickListener
import android.widget.ImageButton
import android.widget.TextView
public class mainActivity extends Activity {
private List<String>myMusicList=new ArrayList<String>()
//当前播放歌曲的索引
private int currentListItem=0
//音乐的路径
private static final String MUSIC_PATH="/sdcard/mp3"
//播放对象
private MediaPlayer myMediaPlayer
private TextView m_TextView
//播放按钮
private ImageButton m_start
private ImageButton m_stop
private ImageButton m_next
private ImageButton m_last
/*设定bIsPaused一开始为false */
private boolean bIsRun = false
private boolean isplay
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState)
setContentView(R.layout.main2)
myMediaPlayer=new MediaPlayer()
musicList()
m_TextView=(TextView)findViewById(R.id.mtextview)
m_start=(ImageButton)findViewById(R.id.imgbtn_start)
m_stop=(ImageButton)findViewById(R.id.imgbtn_stop)
m_next=(ImageButton)findViewById(R.id.imgbtn_next)
m_last=(ImageButton)findViewById(R.id.imgbtn_last)
listener()
Intent intent = this.getIntent()
Bundle bundle = intent.getExtras()
currentListItem = bundle.getInt("currentListItem")
isplay=bundle.getBoolean("isplay")
if(isplay==true)
{
bIsRun=false
playMusic(MUSIC_PATH+"/"+myMusicList.get(currentListItem))
}
}
//监听事件
void listener(){
//开始
m_start.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
try
{
if(myMediaPlayer.isPlaying()==true)
{
myMediaPlayer.pause()
m_start.setImageResource(R.drawable.pause)
}
else
{
playMusic(MUSIC_PATH+"/"+myMusicList.get(currentListItem))
}
}
catch (IllegalStateException e)
{
// TODO Auto-generated catch block
e.printStackTrace()
}
}
})
//下一首
m_next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
nextMusic()
}
})
//上一首
m_last.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
lastMusic()
}
})
//停止
m_stop.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
stopMusic()
}
})
myMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
nextMusic()
}
})
}
//播放音乐
void playMusic(String path){
try {
if(bIsRun==false)
{
myMediaPlayer.reset()
myMediaPlayer.setDataSource(path)
myMediaPlayer.prepare()
myMediaPlayer.start()
/*
* 取出歌曲名的.mp3后缀
* */
String str=(myMusicList.get(currentListItem)).toString()
System.out.println(str)
String str1[]=str.split("\\.")
System.out.println(str1[0])
m_TextView.setText(str1[0])
}
else
{
myMediaPlayer.start()
}
m_start.setImageResource(R.drawable.start)
bIsRun=true
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace()
}
}
//下一首
void nextMusic(){
if(++currentListItem>=myMusicList.size()){
currentListItem=0
}
bIsRun=false
playMusic(MUSIC_PATH+"/"+myMusicList.get(currentListItem))
}
//上一首
void lastMusic(){
if(--currentListItem<0)
currentListItem=myMusicList.size()-1
bIsRun=false
playMusic(MUSIC_PATH+"/"+myMusicList.get(currentListItem))
}
//停止
void stopMusic() {
if (myMediaPlayer.isPlaying()) {
m_start.setImageResource(R.drawable.pause)
myMediaPlayer.stop()// 停止
bIsRun=false
}
else
playMusic(MUSIC_PATH+"/"+myMusicList.get(currentListItem))
}
//当用户返回时结束音乐并释放音乐对象
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if(keyCode==KeyEvent.KEYCODE_BACK){
new AlertDialog.Builder(mainActivity.this).setTitle("message")
.setIcon(android.R.drawable.dialog_frame)
.setMessage("你确定要离开吗?")
.setPositiveButton("确定",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
myMediaPlayer.stop()
myMediaPlayer.release()
finish()
}
}).setNegativeButton("取消",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}).show()
}
return super.onKeyDown(keyCode, event)
}
/**
* 文件过滤器
*
* @author
*
*/
class MusicFilter implements FilenameFilter {
@Override
public boolean accept(File dir, String filename) {
return (filename.endsWith(".mp3"))
}
}
//绑定音乐
void musicList(){
try{
File home=new File(MUSIC_PATH)
if(!home.exists())
home.mkdirs()
if(home.listFiles(new MusicFilter()).length>=0){
for(File file:home.listFiles(new MusicFilter())){
myMusicList.add(file.getName().toString())
}
}
}
catch(Exception ex)
{
ex.printStackTrace()
}
}
}
package my.android.players
import java.io.File
import java.io.FilenameFilter
import java.util.ArrayList
import java.util.List
import android.app.Activity
import android.content.Intent
import android.os.Bundle
import android.view.View
import android.widget.AdapterView
import android.widget.ArrayAdapter
import android.widget.ListView
public class Activity01 extends Activity {
//播放列表
private List<String>myMusicList=new ArrayList<String>()
//当前播放歌曲的索引
private int currentListItem
//音乐的路径
private static final String MUSIC_PATH="/sdcard/mp3"
//播放列表
private ListView m_ListView
private boolean isplay=true
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState)
setContentView(R.layout.main)
m_ListView=(ListView)findViewById(R.id.lv_music)
musicList()
//当选择列表项时播放音乐
m_ListView.setOnItemClickListener(new ListView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?>arg0, View arg1, int arg2,
long arg3) {
currentListItem = arg2
Intent intent = new Intent()
Bundle mBundle=new Bundle()
mBundle.putInt("currentListItem", currentListItem)
mBundle.putBoolean("isplay", isplay)
intent.putExtras(mBundle)
intent.setClass(Activity01.this,mainActivity.class)
startActivity(intent)
finish()
}
})
}
/**
* 文件过滤器
*
* @author
*
*/
class MusicFilter implements FilenameFilter {
@Override
public boolean accept(File dir, String filename) {
return (filename.endsWith(".mp3"))
}
}
//绑定音乐
void musicList(){
try{
File home=new File(MUSIC_PATH)
if(!home.exists())
home.mkdirs()
if(home.listFiles(new MusicFilter()).length>=0){
for(File file:home.listFiles(new MusicFilter())){
myMusicList.add(file.getName().toString())
}
ArrayAdapter<String>musicList=new ArrayAdapter<String>
(Activity01.this,android.R.layout.simple_list_item_1, myMusicList)
m_ListView.setAdapter(musicList)
}
}
catch(Exception ex)
{
ex.printStackTrace()
}
}
}
删除也就从你的列表中拿到指定歌曲的position 然后从数据源中移除 新建播放列表的话你可以重新new一个List 将你要放到新建播放列表中的歌曲的地址add进去不就行了么？下面这个例子是使用service和broadcastReceiver实现的简单音乐播放器，麻雀虽小，五脏俱全，百度搜索安卓无忧，点击源码看源码，你看演示：
MusiceService代码
package mm.shandong.com.testsimplemedia.serviceimport android.app.Service
import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.content.res.AssetFileDescriptor
import android.content.res.AssetManager
import android.media.MediaPlayer
import android.os.IBinder
public class MusicService extends Service {
int currentMusic = 0//0表示没有音乐播放，1表示暂停，2表示正在播放,
int status
MediaPlayer mp
String[] musics = new String[]{"first.mp3", "second.mp3", "third.mp3"}
AssetManager am
public MusicService() {
}
@Override
public void onCreate() {
am = getAssets()
mp = new MediaPlayer()
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
currentMusic++
currentMusic = currentMusic % musics.length
playMusic()
status = 2
Intent intentTemp = new Intent("Update_Music_State")
intentTemp.putExtra("status", status)
intentTemp.putExtra("currentMusic", currentMusic)
sendBroadcast(intentTemp)
}
})
IntentFilter intentFilter = new IntentFilter()
intentFilter.addAction("Get_Music_Control")
///动态注册播放器变化的广播接收者
MusicServiceReceiver musicServiceReceiver = new MusicServiceReceiver()
registerReceiver(musicServiceReceiver, intentFilter)
super.onCreate()
}
public class MusicServiceReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
int control = intent.getIntExtra("control", 0)
switch (control) {
case 0:
//暂停
if (status == 2) {
mp.pause()
status = 1
}
break
case 1:
///播放
if (status == 0) {
playMusic()
status = 2
} else if (status == 1) {
mp.start()
status = 2
}
break
case 3:
break
case 4:
//上一首
if (status == 0) {
if (currentMusic == 0) {
currentMusic = 2
} else {
currentMusic--
}
} else if (status == 1) {
if (currentMusic == 0) {
currentMusic = 2
} else {
currentMusic--
}
status = 0
} else if (status == 2) {
if (currentMusic == 0) {
currentMusic = 2
} else {
currentMusic--
}
playMusic()
}
break
case 5:
//下一首
if (status == 0) {
if (currentMusic == 2) {
currentMusic = 0
} else {
currentMusic++
}
} else if (status == 1) {
if (currentMusic == 2) {
currentMusic = 0
} else {
currentMusic++
}
status = 0
} else if (status == 2) {
if (currentMusic == 2) {
currentMusic = 0
} else {
currentMusic++
}
playMusic()
}
break
}
Intent intentTemp = new Intent("Update_Music_State")
intentTemp.putExtra("status", status)
intentTemp.putExtra("currentMusic", currentMusic)
sendBroadcast(intentTemp)
}
}
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented")
}
public void playMusic() {
try {
AssetFileDescriptor ad = am.openFd(musics[currentMusic])
mp.reset()
mp.setDataSource(ad.getFileDescriptor(), ad.getStartOffset(), ad.getLength())
// mp.create(this,musics[currentMusic])
mp.prepare()
mp.start()
} catch (Exception e) {
e.printStackTrace()
}
}
}
activity代码：
package mm.shandong.com.testsimplemediaimport android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.ImageButton
import android.widget.TextView
import mm.shandong.com.testsimplemedia.service.MusicService
public class TestSimpleMediaActivity extends AppCompatActivity {
ImageButton imageButton
TextView textViewMp3Name
TextView textViewMp3Author
int status = 0
String[] authors = new String[]{"张三", "李四", "王二"}
String[] names = new String[]{"first", "second", "thrid"}
int currentMusic = 0
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_test_simple_media)
imageButton = (ImageButton) findViewById(R.id.imageButton)
textViewMp3Name = (TextView) findViewById(R.id.textViewMp3Name)
textViewMp3Author = (TextView) findViewById(R.id.textViewMp3Author)
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent("Get_Music_Control")
if (status == 2) {
intent.putExtra("control", 0)
} else {
intent.putExtra("control", 1)
}
sendBroadcast(intent)
}
})
IntentFilter intentFilter = new IntentFilter()
intentFilter.addAction("Update_Music_State")
MusicStatusReceiver musicStatusReceiver = new MusicStatusReceiver()
//动态注册activity变化的广播接收者
registerReceiver(musicStatusReceiver, intentFilter)
Intent intent = new Intent(this, MusicService.class)
startService(intent)
Intent intentMusicReceiver = new Intent("Get_Music_Control")
intentMusicReceiver.putExtra("control", 3)
sendBroadcast(intentMusicReceiver)
}
///上一首
public void preMusic(View view) {
Intent intentMusicReceiver = new Intent("Get_Music_Control")
intentMusicReceiver.putExtra("control", 4)
sendBroadcast(intentMusicReceiver)
}
///下一首
public void nextMusic(View view) {
Intent intentMusicReceiver = new Intent("Get_Music_Control")
intentMusicReceiver.putExtra("control", 5)
sendBroadcast(intentMusicReceiver)
}
///定义 *** 作音乐的广播接收者
public class MusicStatusReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
status = intent.getIntExtra("status", 0)
currentMusic = intent.getIntExtra("currentMusic", 0)
switch (status) {
case 0:
textViewMp3Name.setText(names[currentMusic])
textViewMp3Author.setText(authors[currentMusic])
imageButton.setBackgroundResource(R.drawable.play32)
break
case 1:
textViewMp3Name.setText(names[currentMusic])
textViewMp3Author.setText(authors[currentMusic])
imageButton.setBackgroundResource(R.drawable.play32)
break
case 2:
imageButton.setBackgroundResource(R.drawable.pause32)
textViewMp3Name.setText(names[currentMusic])
textViewMp3Author.setText(authors[currentMusic])
break
}
}
}
}
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