音乐播放器

//音乐列表界面，点击播放音乐package com.example.musicplayer;import java.util.ArrayList;import java.util.List;import list.MyList;import adapter.NaAdapter;import android.app.Activity;import android.content.Intent;import android.database.Cursor;import android.os.Bundle;import android.provider.MediaStore;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView;import com.example.bean.Native;public class MainActivity extends Activity {ListView mylistview;private String title;private String artist;private int duration;private String url;NaAdapter adapter;// public static List<Native> musiclist=new ArrayList<Native>();@Overrideprotected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(yout.activity_main);init();}private void init() {// TODO Auto-generated method stubmylistview=(ListView)findViewById(R.id.mylistview);getmusicdata();NaAdapter adapter=new NaAdapter(this,MyList.list);mylistview.setAdapter(adapter);mylistview.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {// TODO Auto-generated method stubNative na=MyList.list.get(arg2);Intent intent=new Intent(MainActivity.this,PlayerActivity.class);intent.putExtra("na",na);intent.putExtra("123", arg2);startActivity(intent);}});}/** 获取本地的音乐*/private void getmusicdata() {//获得ContextResolver() 对象调用query方法查询Cursor cursor = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,null, null, null, null);while(cursor.moveToNext()){title = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));artist = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST));duration = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));//获取歌曲的大小longsize=cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE));url = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));Native music=new Native(title, duration, size, artist, url);MyList.list.add(music);}}}//播放音乐的界面package com.example.musicplayer;import java.io.IOException;import java.util.ArrayList;import java.util.List;import java.util.Timer;import java.util.TimerTask;import list.MyList;import com.example.bean.Native;import android.app.Activity;import android.content.Intent;import android.media.MediaPlayer;import android.media.MediaPlayer.OnCompletionListener; import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener; import android.widget.Button;import android.widget.ImageView;import android.widget.ListView;import android.widget.SeekBar;import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.TextView;public class PlayerActivity extends Activity {private Native na;private ImageView iv_start;private ImageView iv_pause;private ImageView iv_stop;private TextView up; // 上一曲private TextView next; // 下一曲private MediaPlayer m; // 音乐播放器private int n = 0; // 播放顺序private SeekBar sb_progress; // 拖动条private Timer timer; // 时间器private Handler handler = new Handler() {public void handleMessage(Message msg) {super.handleMessage(msg);if(msg.arg1==0){sb_progress.setProgress(m.getCurrentPosition());}// if (m.getCurrentPosition() == m.getDuration()) {// timer.cancel();// } else {// sb_progress.setProgress(m.getDuration());// }}};// private Music music;private SeekBar sb_lound; // 音量private TextView music;private int position;private TextView bt_back;// private List<Music> mlist;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.activity_player);init();}public void init() {// 找对象bt_back = (TextView) findViewById(R.id.bt_back);music = (TextView) findViewById(R.id.music);iv_start = (ImageView) findViewById(R.id.start);iv_pause = (ImageView) findViewById(R.id.pause);iv_stop = (ImageView) findViewById(R.id.stop);up = (TextView) findViewById(R.id.up);next = (TextView) findViewById(R.id.next);sb_progress = (SeekBar) findViewById(R.id.sb_progress);sb_lound = (SeekBar) findViewById(R.id.sb_lound);m = MediaPlayer.create(PlayerActivity.this, R.raw.music1);// 接收传来的数据Intent in = getIntent();na = (Native) in.getSerializableExtra("na");// 设置歌曲名music.setText(na.getTitle());position=in.getIntExtra("123", 0);try {if(m!=null){m.pause();}// 创建mediaplayer对象，并加载音乐资源m = new MediaPlayer();// 加载sdcard音乐路径m.setDataSource(na.getUrl());m.prepare();m.start();seek();// 加监听，当歌曲播放完毕后自动播放下一曲m.setOnCompletionListener(new OnCompletionListener() {public void onCompletion(MediaPlayer mp) {musicAuto();}});} catch (IllegalArgumentException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SecurityException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}bt_back.setOnClickListener(l);iv_start.setOnClickListener(l);iv_pause.setOnClickListener(l);iv_stop.setOnClickListener(l);up.setOnClickListener(l);next.setOnClickListener(l);// //给拖拽条加监听sb_progress.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {public void onStopTrackingTouch(SeekBar seekBar) {m.seekTo(seekBar.getProgress());}public void onStartTrackingTouch(SeekBar seekBar) {}public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {}});// 拖拽进度条改变音量sb_lound.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}// 调节音量public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {// 此方法有两个floa类型参数左右声道的音量音量大小的增幅为0——1之间// max已设置为10m.setVolume((float) progress / 100, (float) progress / 100);}});}public void seek() {if(timer !=null){timer.cancel();}sb_progress.setMax(m.getDuration());timer = new Timer();timer.schedule(new TimerTask() {@Overridepublic void run() {// TODO Auto-generated method stubhandler.sendEmptyMessage(0);}}, 0, 100);}// 自动播放下一曲public void musicAuto() {m.stop();position++;if (position == (na.getUrl().length())) {position = 0;}// 设置歌曲名music.setText(MyList.list.get(position).getTitle());// music=mlist.get(n);m = new MediaPlayer();try {m.setDataSource(MyList.list.get(position).getUrl());m.prepare();// sb_progress.setMax(m.getDuration());seek();m.start();m.setOnCompletionListener(new OnCompletionListener() { public void onCompletion(MediaPlayer mp) {musicAuto();}});} catch (IllegalArgumentException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SecurityException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}OnClickListener l = new OnClickListener() {public void onClick(View v) {switch (v.getId()) {case R.id.bt_back: // 返回finish();break;case R.id.start: // 开始播放m.start();break;case R.id.pause:// 暂停if (m.isPlaying()) {m.pause();} else {m.start();}break;case R.id.stop: // 销毁m.stop(); // stop以后就会销毁mediaplayer对象，再点stop也没用break;case R.id.up: // 上一首vm.stop();position--;if (position == -1) {position = MyList.list.size();}// 设置歌曲名music.setText(MyList.list.get(position).getTitle());m = new MediaPlayer();// 加载sdcard音乐路径try {m.setDataSource(MyList.list.get(position).getUrl());m.prepare();// sb_progress.setMax(m.getDuration());seek();m.start();// 给多媒体加监听（音乐播放完后）m.setOnCompletionListener(new OnCompletionListener() {public void onCompletion(MediaPlayer mp) {musicAuto(); // 用了个递归}});} catch (IllegalArgumentException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SecurityException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}break;case R.id.next: // 下一首// m.stop(); // 先销毁上一个MediaPlayermusicAuto();break;}}};}//封装类package com.example.bean;import java.io.Serializable;public class Native implements Serializable{ private String title;private long duration;private long size;private String artist;private String url;private boolean native_guanli_item_ck;public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public long getDuration() {return duration;}public void setDuration(long duration) { this.duration = duration;}public long getSize() {return size;}public void setSize(long size) {this.size = size;}public String getArtist() {return artist;}public void setArtist(String artist) {this.artist = artist;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public boolean isNative_guanli_item_ck() {return native_guanli_item_ck;}public void setNative_guanli_item_ck(boolean native_guanli_item_ck) {this.native_guanli_item_ck = native_guanli_item_ck;}public Native(String title, long duration, long size, String artist, String url) {super();this.title = title;this.duration = duration;this.size = size;this.artist = artist;this.url = url;}}。