Android 第三次作业

 

 

一、实现的功能

1.读取本地音乐文件

2.实现音乐的播放、暂停、上一首和下一首、以及退出。

二、实现界面截图

 

 

三、主要代码

 

public android.os.Handler handler = new android.os.Handler();
    public Runnable runnable = new Runnable() {
        @Override
        public void run() {
            if(musicService.mp.isPlaying()) {
                musicStatus.setText(getResources().getString(R.string.playing));
                btnPlayOrPause.setText(getResources().getString(R.string.pause).toUpperCase());
            } else {
                musicStatus.setText(getResources().getString(R.string.pause));
                btnPlayOrPause.setText(getResources().getString(R.string.play).toUpperCase());
            }
            musicTime.setText(time.format(musicService.mp.getCurrentPosition()) + "/"
                    + time.format(musicService.mp.getDuration()));
            seekBar.setProgress(musicService.mp.getCurrentPosition());
            seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                @Override
                public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                    if (fromUser) {
                        musicService.mp.seekTo(seekBar.getProgress());
                    }
                }

                @Override
                public void onStartTrackingTouch(SeekBar seekBar) {

                }

                @Override
                public void onStopTrackingTouch(SeekBar seekBar) {

                }
            });
            handler.postDelayed(runnable, 100);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.d("hint", "ready to new MusicService");
        musicService = new MusicService();
        Log.d("hint", "finish to new MusicService");
        bindServiceConnection();

        seekBar = (SeekBar)this.findViewById(R.id.MusicSeekBar);
        seekBar.setProgress(musicService.mp.getCurrentPosition());
        seekBar.setMax(musicService.mp.getDuration());

        musicStatus = (TextView)this.findViewById(R.id.MusicStatus);
        musicTime = (TextView)this.findViewById(R.id.MusicTime);

        btnPlayOrPause = (Button)this.findViewById(R.id.BtnPlayorPause);

        Log.d("hint", Environment.getExternalStorageDirectory().getAbsolutePath()+"/You.mp3");
    }

 

项目链接：

https://git.coding.net/qhy1600802054/music.git

apk链接：

https://coding.net/u/qhy1600802054/p/music/git/raw/master/1600802054.apk