Android第三次作业

一、播放器截图

当某一首歌播放的时候使用绿色为他的底部，同时我这个音乐播放器支持进度条拖拽快进。

二、播放器关键代码

设置绑定功能

public int getPlayPosition() {
        return playPosition;
    }

    public void setPlayPosition(int playPosition) {
        this.playPosition = playPosition;
    }

    public MyBinder(MusicService musicService) {
        this.musicService = musicService;
    }

    public List<String> getSimpleMusics() {
        return simpleMusics;
    }

    public void setSimpleMusics(List<String> simpleMusics) {
        this.simpleMusics = simpleMusics;
    }

    public void setMusicService(MusicService musicService) {
        this.musicService = musicService;
    }

    public boolean isPause() {
        return isPause;
    }

    public void setPause(boolean pause) {
        isPause = pause;
    }

    public MusicService getMusicService() {
        return musicService;
    }

    public List<String> getMusics() {
        return musics;
    }

    public void setMusics(List<String> musics) {
        this.musics = musics;
    }

    public int getCurMusicIndex() {
        return curMusicIndex;
    }

    public void setCurMusicIndex(int curMusicIndex) {
        this.curMusicIndex = curMusicIndex;
    }

    public int getPausePosition() {
        return pausePosition;
    }

    public void setPausePosition(int pausePosition) {
        this.pausePosition = pausePosition;
    }

    public int getTotalMusicTime() {
        return totalMusicTime;
    }

    public void setTotalMusicTime(int totalMusicTime) {
        this.totalMusicTime = totalMusicTime;
    }

　　

播放功能实现

 1 public void play(){
 2         player.reset();
 3         try{
 4             player.setDataSource(musics.get(binder.getCurMusicIndex()));
 5             player.prepare();
 6             player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
 7                 @Override
 8                 public void onPrepared(MediaPlayer mediaPlayer) {
 9                     player.start();
10                 }
11             });
12             player.seekTo(binder.getPausePosition());
13             binder.setTotalMusicTime(player.getDuration());
14         }catch (IOException e){
15             e.printStackTrace();
16         }
17     }

暂停功能

 if (player.isPlaying()){
            player.pause();
            binder.setPause(true);
            binder.setPausePosition(player.getCurrentPosition());
        }

下一首功能

if (curMusicIndex >=musics.size()){
            binder.setCurMusicIndex(0);
            binder.setPausePosition(0);
            play();
        }
        else{
            binder.setCurMusicIndex(curMusicIndex);
            binder.setPausePosition(0);
            play();
        }

上一首功能

1 if (curMusicIndex<0) {
2             binder.setCurMusicIndex(musics.size() - 1);
3             binder.setPausePosition(0);
4             play();
5         }else{
6             binder.setCurMusicIndex(curMusicIndex);
7             binder.setPausePosition(0);
8             play();
9         }

实现进度条以及进度条快进

1 handler = new Handler(){
2             @Override
3             public void handleMessage(Message msg) {
4                 String playTime = msg.getData().getString("playTime");
5                 String totalTime = msg.getData().getString("totalTime");
6                 textCur.setText(playTime);
7                 textTotal.setText(totalTime);
8             }
9         }

实现音乐目录的遍历

 1 private void initLiseView(){
 2         String path = Environment.getExternalStorageDirectory().getAbsolutePath()+"/music/";
 3         File mp3dir = new File(path);
 4         if (mp3dir.isDirectory()){
 5             File[] files = mp3dir.listFiles();
 6             for(File f:files){
 7                 musics.add(f.getAbsolutePath());
 8                 simpleMusics.add(f.getName());
 9             }
10         }
11         binder.setMusics(musics);
12         binder.setSimpleMusics(simpleMusics);
13     }

三、GitHub以及apk文件的网址

Github：https://github.com/JusperLee/player.git

GitHub_APK: https://github.com/JusperLee/player/blob/master/app/release/app-release.apk