1、 制作一个完整的音乐播放器，包含两个界面：音乐列表界面和播放界面 音乐列表界面 播放界面 2、 任务要求 1）音乐列表界面 a)该activity使用LinearLayout的垂直布局 b)在LinearLayout中使用ListView控件 c)点击ListView控件的一个子项，跳转至音乐播放界面 2）音乐播放界面 a)该activity使用LinearLayout的垂直布局 b)顶部添加 button控件，显示为“返回播放列表” c)添加一个显示歌曲名称的Textview d)添加一个显示歌手名的Textview e)添加一个imageView，请求网络显示对应的海报图片 f)添加一个seekbar和两个分别显示总时长与当前播放时间的Textview g)底部添加三个按钮，分别为上一首、播放、暂停、下一首。 安卓代码

好的，根据您的任务要求，以下是一个简单的安卓代码示例，用于实现一个基本的音乐播放器。注意，这只是一个示例代码，具体的实现方式可能会有所不同。

音乐列表界面的Activity：

public class MusicListActivity extends AppCompatActivity {
    private ListView mListView;

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

        mListView = findViewById(R.id.list_view);
        mListView.setAdapter(new MusicListAdapter(this));
        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent intent = new Intent(MusicListActivity.this, MusicPlayActivity.class);
                intent.putExtra("position", position);
                startActivity(intent);
            }
        });
    }
}

音乐播放界面的Activity：

public class MusicPlayActivity extends AppCompatActivity {
    private MediaPlayer mMediaPlayer;
    private ImageView mAlbumImage;
    private TextView mSongNameText;
    private TextView mArtistText;
    private TextView mCurrentTimeText;
    private TextView mTotalTimeText;
    private SeekBar mSeekBar;
    private Button mPlayButton;
    private Button mPauseButton;
    private Button mPrevButton;
    private Button mNextButton;

    private int mPosition;

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

        mPosition = getIntent().getIntExtra("position", 0);

        mMediaPlayer = new MediaPlayer();
        mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mSeekBar.setMax(mMediaPlayer.getDuration());
                mTotalTimeText.setText(formatTime(mMediaPlayer.getDuration()));
                mp.start();
                updateSeekBar();
            }
        });
        mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                playNext();
            }
        });

        mAlbumImage = findViewById(R.id.album_image);
        mSongNameText = findViewById(R.id.song_name_text);
        mArtistText = findViewById(R.id.artist_text);
        mCurrentTimeText = findViewById(R.id.current_time_text);
        mTotalTimeText = findViewById(R.id.total_time_text);
        mSeekBar = findViewById(R.id.seek_bar);
        mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                if (fromUser) {
                    mMediaPlayer.seekTo(progress);
                    updateSeekBar();
                }
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                // Do nothing
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // Do nothing
            }
        });
        mPlayButton = findViewById(R.id.play_button);
        mPlayButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mMediaPlayer.isPlaying()) {
                    mMediaPlayer.pause();
                    mPlayButton.setVisibility(View.VISIBLE);
                    mPauseButton.setVisibility(View.GONE);
                } else {
                    mMediaPlayer.start();
                    mPlayButton.setVisibility(View.GONE);
                    mPauseButton.setVisibility(View.VISIBLE);
                    updateSeekBar();
                }
            }
        });
        mPauseButton = findViewById(R.id.pause_button);
        mPauseButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mMediaPlayer.isPlaying()) {
                    mMediaPlayer.pause();
                    mPlayButton.setVisibility(View.VISIBLE);
                    mPauseButton.setVisibility(View.GONE);
                }
            }
        });
        mPrevButton = findViewById(R.id.prev_button);
        mPrevButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                playPrev();
            }
        });
        mNextButton = findViewById(R.id.next_button);
        mNextButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                playNext();
            }
        });

        loadSongInfo();
    }

    private void loadSongInfo() {
        // 根据mPosition从音乐列表中获取歌曲信息，包括歌曲名称、歌手名和海报图片等
        // 然后将这些信息显示在相应的控件上
    }

    private void playPrev() {
        mPosition--;
        if (mPosition < 0) {
            mPosition = MusicListData.getInstance().getSize() - 1;
        }
        playSong();
    }

    private void playNext() {
        mPosition++;
        if (mPosition >= MusicListData.getInstance().getSize()) {
            mPosition = 0;
        }
        playSong();
    }

    private void playSong() {
        mMediaPlayer.reset();
        // 根据mPosition从音乐列表中获取歌曲的url，并设置给MediaPlayer
        try {
            mMediaPlayer.setDataSource(songUrl);
            mMediaPlayer.prepareAsync();
        } catch (IOException e) {
            e.printStackTrace();
        }
        loadSongInfo();
    }

    private void updateSeekBar() {
        if (mMediaPlayer.isPlaying()) {
            mCurrentTimeText.setText(formatTime(mMediaPlayer.getCurrentPosition()));
            mSeekBar.setProgress(mMediaPlayer.getCurrentPosition());
            mHandler.postDelayed(mRunnable, 1000);
        }
    }

    private Handler mHandler = new Handler();
    private Runnable mRunnable = new Runnable() {
        @Override
        public void run() {
            updateSeekBar();
        }
    };

    private String formatTime(int time) {
        int totalSeconds = time / 1000;
        int minutes = totalSeconds / 60;
        int seconds = totalSeconds % 60;
        return String.format("%02d:%02d", minutes, seconds);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMediaPlayer.release();
        mHandler.removeCallbacks(mRunnable);
    }
}

这是一个简单的示例代码，您可以根据自己的实际需求进行修改和完善。希望能对您有所帮助！