main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android :color/holo_blue_light"
    tools:context="com.example.mymusiclist.MainActivity$PlaceholderFragment" >

<TextView
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textSize="21sp"
        android:text="音乐列表" />
    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/textView1"  
        >
</ListView>
</RelativeLayout>

listview.xml(布局xml)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

<TextView
        android:id="@+id/music_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="3dp"
        android:layout_marginLeft="3dp"
        android:layout_weight="1"
        android:text="music_title" />

<LinearLayout
        android:id="@+id/ll1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="3dp"
        android:layout_marginTop="3dp"
        android:layout_weight="1"
        android:orientation="horizontal" >

<TextView
            android:id="@+id/music_artist"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:layout_marginLeft="3dp"
            android:text="music_artist" />

<TextView
            android:id="@+id/music_duration"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:text="music_duration" />
    </LinearLayout>

</LinearLayout>

MainActivity.java

package com.example.mymusiclist;

import java.util.ArrayList;
import java.util.List;

import android.support.v7.app.ActionBarActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.widget.ListView;
import android.provider.MediaStore;

public class MainActivity extends ActionBarActivity {
private ListView listView;
private ArrayList<MusicMp3> musicList = new ArrayList<MusicMp3>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_main);
        listView = (ListView) findViewById(R.id.listView1);
        musicList = getMp3Infos();
        MusicListAdapter adapter = new MusicListAdapter(this, musicList);
        listView.setAdapter(adapter);
    }
    public ArrayList<MusicMp3> getMp3Infos() {  //获取音乐列表信息
        Cursor cursor = getContentResolver().query(  
            MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null,  
            MediaStore.Audio.Media.DEFAULT_SORT_ORDER);  
        ArrayList<MusicMp3> mp3Infos = new ArrayList<MusicMp3>();  
        for (int i = 0; i < cursor.getCount(); i++) {  
            MusicMp3 mp3Info = new MusicMp3();  
            cursor.moveToNext();  
            long id = cursor.getLong(cursor  
                .getColumnIndex(MediaStore.Audio.Media._ID));   //音乐id  
            String title = cursor.getString((cursor   
                .getColumnIndex(MediaStore.Audio.Media.TITLE)));//音乐标题  
            String artist = cursor.getString(cursor  
                .getColumnIndex(MediaStore.Audio.Media.ARTIST));//艺术家  
            long duration = cursor.getLong(cursor  
                .getColumnIndex(MediaStore.Audio.Media.DURATION));//时长  
            long size = cursor.getLong(cursor  
                .getColumnIndex(MediaStore.Audio.Media.SIZE));  //文件大小  
            String url = cursor.getString(cursor  
                .getColumnIndex(MediaStore.Audio.Media.DATA));              //文件路径  
        int isMusic = cursor.getInt(cursor  
            .getColumnIndex(MediaStore.Audio.Media.IS_MUSIC));//是否为音乐  
        if (isMusic != 0) {     //只把音乐添加到集合当中  
            mp3Info.setId(id);  
            mp3Info.setTitle(title);  
            mp3Info.setArtist(artist);  
            mp3Info.setDuration(duration);  
            mp3Info.setSize(size);  
            mp3Info.setUrl(url);  
            mp3Infos.add(mp3Info);  
            }  
        }  
    return mp3Infos;  
    }

}

MusicListAdapter.java

package com.example.mymusiclist;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class MusicListAdapter extends BaseAdapter {
    private final static String TAG = "MusicListAdapter";
    private LayoutInflater inflater;
    private Context mContext;
    private ArrayList<Mp3Info> mList;
public MusicListAdapter(Context context, ArrayList<Mp3Info> list){
    mContext = context;
    mList = list;
    inflater = LayoutInflater.from(context);
}
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return mList.size();
    }

@Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return mList.get(position);
    }

@Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

@Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        View view;
        if(convertView != null){
            view = convertView;
        } else {
            view = inflater.inflate(R.layout.listview_item, parent, false);
        }
        TextView  title = (TextView)view.findViewById(R.id.music_title);
        TextView artist = (TextView) view.findViewById(R.id.music_artist);
        TextView duration = (TextView) view.findViewById(R.id.music_duration);
        String music_title = mList.get(position).getTitle();
        String music_artist = mList.get(position).getArtist();
        long music_duration = mList.get(position).getDuration();
        title.setText(music_title);
        if(music_artist.equals("<unknown>")){            
            artist.setText("未知艺术家");
        }else{
            artist.setText(music_artist);
        }
        Log.d(TAG, "music_artist============="+music_artist);
        duration.setText(getStringTime(music_duration));
        return view;
    }
public String getStringTime(long duration){
       SimpleDateFormat sDateFormat = new SimpleDateFormat("mm:ss");
       return sDateFormat.format(new Date(duration));
}
}

属性实体MusicMp3.java

package com.example.mymusiclist;

public class MusicMp3 {

//属性值，生成get和set方法  构造方法
    long id;
    long duration;
    long size;
    String title;
    String url;
    String artist;
    public MusicMp3(){ }
    
    public MusicMp3(long id, long duration, long size, String title, String url,
            String artist) {
        super();
        this.id = id;
        this.duration = duration;
        this.size = size;
        this.title = title;
        this.url = url;
        this.artist = artist;
    }

public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    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 getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public String getArtist() {
        return artist;
    }
    public void setArtist(String artist) {
        this.artist = artist;
    }
    @Override
    public String toString() {
        return "Mp3Info [id=" + id + ", duration=" + duration + ", size="
                + size + ", title=" + title + ", url=" + url + ", artist="
                + artist + "]";
    }
    
    
    
}