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Android音乐播放器开发实战

最新推荐文章于 2025-09-07 10:47:06 发布

转载最新推荐文章于 2025-09-07 10:47:06 发布 · 74 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/ck03/p/10105319.html

文章标签：

#git #数据库

1.播放界面截图：

播放列表：

2.关键代码：

获取音乐列表（通过多媒体数据库中存储的的信息）（首先定义了一个Music类用于存储音乐文件的各种信息）：

public List<Music> getmusics( Context context){
    List<Music> musiclist=new ArrayList<Music>();//定义一个music类型的列表
　　//定义一个游标，用来遍历音乐文件
    Cursor cursor=context.getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null, MediaStore.Audio.Media.DEFAULT_SORT_ORDER);
    if(cursor.moveToFirst()){
        while(!cursor.isAfterLast()){
            Music music=new Music();
            int music_id=cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID));//音乐的ID
            int album_id=cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID));//专辑的ID
            String album=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM));//专辑名称
            String title=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));//歌曲名称
            String artist=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST));//歌手
            double time=cursor.getDouble(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION))/60000;
　　　　　　//音乐的播放时长，由于单位是毫秒所以除了60000，但暂时还没有以分：秒 形式显示出来
            String url=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));//音乐文件的路径
            String title_artist=title+"--"+artist;
            int isMusic=cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.IS_MUSIC));
            if(isMusic!=0){
                music.setMusic_id(music_id);
                music.setAlbum_id(album_id);
                music.setAlbum(album);
                music.setTitle(title);
                music.setArtist(artist);
                music.setTime(time);
                music.setUrl(url);
                music.setTitle_artist(title_artist);
                musiclist.add(music);
            }
            cursor.moveToNext();
        }
    }
    return musiclist;
}
//设置数据适配器

SimpleAdapter adapter=new SimpleAdapter(getApplicationContext(),musiclist,R.layout.music_list,new String[]{"title_artist","album"},new int[]{R.id.title_artist,R.id.album});
lv.setAdapter(adapter);//绑定数据适配器

//为lv这个list设置监听器，并重写onItemClick方法，点击Item可以播放音乐

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                play(mp3list.get(i).getUrl(),mediaplay);//mp3list.get(i).getURl(),是你点击的Item对应音乐的文件路径，play是自己定义的一个播放音乐的方法
            }
        });

播放，暂停，上一首，下一首

ImageButton.OnClickListener listener = new ImageButton.OnClickListener() {
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.bt_last:
　　　　　　　　//上一首
                if (current_music > 0) {
                    current_music = current_music - 1;
                    mediaplay.reset();
                    play(mp3list.get(current_music).getUrl(), mediaplay);
                    isrelease = false;
                    start.setImageDrawable(getResources().getDrawable(R.drawable.paste));
                    if(mp3list.size()!=0){
                        music_name.setText(mp3list.get(current_music).getTitle());
                        artist_name.setText("-- "+mp3list.get(current_music).getArtist()+" --");
                        total_time.setText(mp3list.get(current_music).getFormatTime());
                        progressbar.setMax(mp3list.get(current_music).getTime());
                   }
                }else{
                    current_music = mp3list.size()-1;
                    mediaplay.reset();
                    play(mp3list.get(current_music).getUrl(), mediaplay);
                    isrelease = false;
                    start.setImageDrawable(getResources().getDrawable(R.drawable.paste));
                    if(mp3list.size()!=0){
                        music_name.setText(mp3list.get(current_music).getTitle());
                        artist_name.setText("-- "+mp3list.get(current_music).getArtist()+" --");
                        total_time.setText(mp3list.get(current_music).getFormatTime());
                        progressbar.setMax(mp3list.get(current_music).getTime());
                    }
                }
                break;
　　　　　　　　//播放，暂停
            case R.id.bt_start:
                if(isrelease){
                    mediaplay.reset();
                    play(mp3list.get(current_music).getUrl(), mediaplay);
                    isrelease=false;
                }
                if(!mediaplay.isPlaying()){
                    mediaplay.start();
                    ((ImageButton)v).setImageDrawable(getResources().getDrawable(R.drawable.paste));
                }else {
                    mediaplay.pause();
                    ((ImageButton) v).setImageDrawable(getResources().getDrawable(R.drawable.start));
                }
                break;
　　　　　　　　//下一首
            case R.id.bt_next:
                if (current_music < mp3list.size()-1) {
                    current_music = current_music + 1;
                    mediaplay.reset();
                    play(mp3list.get(current_music).getUrl(), mediaplay);
                    start.setImageDrawable(getResources().getDrawable(R.drawable.paste));
                    isrelease=false;
                    if(mp3list.size()!=0){
                        music_name.setText(mp3list.get(current_music).getTitle());
                        artist_name.setText("-- "+mp3list.get(current_music).getArtist()+" --");
                        total_time.setText(mp3list.get(current_music).getFormatTime());
                        progressbar.setMax(mp3list.get(current_music).getTime());
                    }
                }else{
                    current_music = 0;
                    mediaplay.reset();
                    play(mp3list.get(current_music).getUrl(), mediaplay);
                    start.setImageDrawable(getResources().getDrawable(R.drawable.paste));
                    isrelease=false;
                    if(mp3list.size()!=0){
                        music_name.setText(mp3list.get(current_music).getTitle());
                        artist_name.setText("-- "+mp3list.get(current_music).getArtist()+" --");
                        total_time.setText(mp3list.get(current_music).getFormatTime());
                        progressbar.setMax(mp3list.get(current_music).getTime());
                    }
                }
                break;