一、实现的功能
1、扫描虚拟机sdcard目录下所有的MP3音乐文件，并以列表的形式显示
2、点击想听的音乐，跳转至播放界面进行播放
3、播放界面中功能包括播放、暂停、停止、播放上一首、播放下一首、循环播放、显示当前播放时间、总播放时间，能进度条的拖拽进行快进等功能
二、界面截图
选择歌曲列表 播放界面、具体功能都在底部
三、关键代码
歌曲列表中ListView显示sdcard目录下所有的MP3文件
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_select_music); if(root.exists()) { dirFiles = root.listFiles(); } for (File dirFile : dirFiles) { if (dirFile.getAbsolutePath().endsWith(".mp3") || dirFile.getAbsolutePath().endsWith(".MP3")) { mp3Files.add(dirFile.getAbsolutePath()); musicName.add(dirFile.getName()); } } final ListView listView = (ListView)findViewById(R.id.allMusic); listView.setAdapter(new MyAdapter(SelectMusicActivity.this,musicName));
点击相应歌曲跳转页面并传对应的歌曲编号
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { Intent intent = new Intent(SelectMusicActivity.this,MainActivity.class); Bundle bundle = new Bundle(); bundle.putInt("id",i); intent.putExtras(bundle); startActivity(intent); } });
ListView对应的适配器类中显示文件信息
public View getView(final int i, View view, ViewGroup viewGroup) { ViewHolder viewHolder = null; if (view == null) { viewHolder = new ViewHolder(); view = LayoutInflater.from(mContext).inflate(R.layout.allmusic_item, null); viewHolder.mPhoto = (ImageView) view.findViewById(R.id.photo); viewHolder.mMusicName = (TextView)view.findViewById(R.id.MusicName); viewHolder.mIcon = (ImageView)view.findViewById(R.id.micon); view.setTag(viewHolder); } else { viewHolder = (ViewHolder) view.getTag(); } viewHolder.mPhoto.setImageResource(pic[i%7]); viewHolder.mMusicName.setText(mList.get(i)); viewHolder.mIcon.setImageResource(R.drawable.stopmusic); return view; }
播放、暂停功能的实现
play.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if(mediaPlayer != null) { Completion(); new MyThre().start(); } else if(mediaPlayer.isPlaying()){ mediaPlayer.pause(); play.setImageResource(R.drawable.stopmusic); } else if(!mediaPlayer.isPlaying()){ mediaPlayer.start(); int duration = mediaPlayer.getDuration();//获取音乐的总时长 seekBar.setMax(duration);//设置进度条的最大值为音乐的总时长 if(duration%60000/1000>=0 && duration%60000/1000<=9) totaltime.setText("0"+duration/60000+":0"+duration%60000/1000); else totaltime.setText("0"+duration/60000+":"+duration%60000/1000); play.setImageResource(R.drawable.playmusic); } } });
public void Completion(){ play.setImageResource(R.drawable.playmusic); if(mediaPlayer.isPlaying()) { mediaPlayer.reset(); } mediaPlayer = new MediaPlayer(); file = new File(String.valueOf(mp3Files.get(number)));//获取音乐路径 name.setText(MusicNames.get(number)); icon.setImageResource(singerphotos[number%7]); try { mediaPlayer.setDataSource(MainActivity.this, Uri.parse(file.getPath()));//设置音乐路径 mediaPlayer.prepare();//播放前准备 int duration = mediaPlayer.getDuration();//获取音乐的总时长 seekBar.setMax(duration);//设置进度条的最大值为音乐的总时长 if(duration%60000/1000>=0 && duration%60000/1000<=9) totaltime.setText("0"+duration/60000+":0"+duration%60000/1000); else totaltime.setText("0"+duration/60000+":"+duration%60000/1000); mediaPlayer.seekTo(0); seekBar.setProgress(0); } catch (IOException e) { e.printStackTrace(); } mediaPlayer.start(); }
播放上一首
premusic.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { number--; if(number == -1) number=mp3Files.size()-1; Completion(); } });
播放下一首
nextmusic.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { number++; if(number == mp3Files.size()) number = 0; Completion(); } });
停止播放
stop.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if(mediaPlayer.isPlaying()) { mediaPlayer.reset(); file = new File(String.valueOf(mp3Files.get(number)));//获取音乐路径 try { mediaPlayer.setDataSource(MainActivity.this, Uri.parse(file.getPath()));//设置音乐路径 seekBar.setProgress(0); mediaPlayer.prepare();//播放前准备 } catch (IOException e) {//抛出异常 e.printStackTrace(); } play.setImageResource(R.drawable.stopmusic); } } });
进度条的拖动
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { int current = mediaPlayer.getCurrentPosition(); if(current%60000/1000>=0 && current%60000/1000<=9) nowtime.setText("0"+current/60000+":0"+current%60000/1000); else nowtime.setText("0"+current/60000+":"+current%60000/1000); } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { int progress = seekBar.getProgress();//获取拖动结束之后的位置 mediaPlayer.seekTo(progress);//跳转到某个位置播放 play.setImageResource(R.drawable.playmusic); mediaPlayer.start(); } });
进度条的实时更新播放进度
private class MyThre extends Thread{ @Override public void run() { super.run(); while(seekBar.getProgress()<=seekBar.getMax()){ handler.sendEmptyMessage(mediaPlayer.getCurrentPosition()); try{ MyThre.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } } } }
四、代码链接
https://git.coding.net/qhu_1600802113/MusicPlayer.git
五、APK链接
https://coding.net/u/qhu_1600802113/p/MusicPlayer/git/tree/master/app
六、APP操作视频网址
