从列表中选择歌曲，在项目单击侦听器上导航到媒体播放器并使用媒体播放器播放歌曲

Question

public class MarathiActivity extends Activity 
{
    ListView list;

    String[] web = {
            "song name 1 ",
            "song name 2",
            "song name 3",
            "song name 4",
            "song name 5",
            "song name 6",
            "song name 7",
            "song name 8"

    } ;

    Integer[] imageId = {
            R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,
            R.mipmap.ic_launcher
    };

    public  int[] resID = {
            R.raw.song1,
            R.raw.song2,
            R.raw.song3,
            R.raw.song4,
            R.raw.song5,
            R.raw.song6,
            R.raw.song7,
            R.raw.song8
    };
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.marathi);
        CustomList adapter = new
                CustomList(MarathiActivity.this, web);
        list=(ListView)findViewById(R.id.list);
        list.setAdapter(adapter);
        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                Intent i = new Intent(MarathiActivity.this,MusicPlayer.class);
                startActivity(i);
               // playSong(position);

            }
        });

它的马拉地语歌曲列表，

public class MusicPlayer extends Activity
{
    private MediaPlayer mediaPlayer;
    public TextView songName, duration;
    private double timeElapsed = 0, finalTime = 0;
    private int forwardTime = 2000, backwardTime = 2000;
    private Handler durationHandler = new Handler();
    private SeekBar seekbar;
    MarathiActivity ma;
    int position0;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //set the layout of the Activity
        setContentView(R.layout.musicplayer);

        //initialize views
        initializeViews();
    }

    public void initializeViews(){
        songName = (TextView) findViewById(R.id.songName);

        mediaPlayer = MediaPlayer.create(this,R.raw.songname);
        finalTime = mediaPlayer.getDuration();
        duration = (TextView) findViewById(R.id.songDuration);
        seekbar = (SeekBar) findViewById(R.id.seekBar);
        songName.setText("Sample_Song.mp3");

        seekbar.setMax((int) finalTime);
        seekbar.setClickable(false);
    }

    // play mp3 song
    public void play(View view) {
        mediaPlayer.start();
        timeElapsed = mediaPlayer.getCurrentPosition();
        seekbar.setProgress((int) timeElapsed);
        durationHandler.postDelayed(updateSeekBarTime, 100);
    }

    //handler to change seekBarTime
    private Runnable updateSeekBarTime = new Runnable() {
        public void run() {
            //get current position
            timeElapsed = mediaPlayer.getCurrentPosition();
            //set seek bar progress
            seekbar.setProgress((int) timeElapsed);
            //set time remaining
            double timeRemaining = finalTime - timeElapsed;
            duration.setText(String.format("%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes((long) timeRemaining), TimeUnit.MILLISECONDS.toSeconds((long) timeRemaining) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) timeRemaining))));

            //repeat yourself that again in 100 milliseconds
            durationHandler.postDelayed(this, 100);
        }
    };

    // pause mp3 song
    public void pause(View view) {
        mediaPlayer.pause();
    }

  /*  // go forward at forwardTime seconds
    public void forward(View view) {
        //check if we can go forward at forwardTime seconds before song endes
        if ((timeElapsed + forwardTime)  0) {
            timeElapsed = timeElapsed - backwardTime;

            //seek to the exact second of the track
            mediaPlayer.seekTo((int) timeElapsed);
        }
    }*/

}

我想创建媒体播放器并在媒体播放器中的项目单击侦听器上播放选定的歌曲，我在音乐播放器活动中遇到问题，如何将选定的歌曲名称映射到我必须以原始格式保存的歌曲文件夹？？

Answer 1

请修改您的代码，如下所示

 list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                Intent i = new Intent(MarathiActivity.this,MusicPlayer.class);
                i.putExtra("SongName", web[position]);
                i.putExtra("Song", resID[position]);
                startActivity(i);
               // playSong(position);

            }
        });

MusicPlayer.class

    String m_songName;
    int m_songRes;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //set the layout of the Activity
        setContentView(R.layout.musicplayer);


        if(getIntent().getExtras()!= null)
        {
            m_songName = getIntent().getExtras().getString("SongName");
            m_songRes = getIntent().getExtras().getInt("Song");
        }

        //initialize views
        initializeViews();
    }

    public void initializeViews(){
        songName = (TextView) findViewById(R.id.songName);

        mediaPlayer = MediaPlayer.create(this,m_songRes);
        finalTime = mediaPlayer.getDuration();
        duration = (TextView) findViewById(R.id.songDuration);
        seekbar = (SeekBar) findViewById(R.id.seekBar);
        songName.setText(m_songName);

        seekbar.setMax((int) finalTime);
        seekbar.setClickable(false);
    }

Answer 2

我不太明白，你想要什么，但试着这样做：

public class MySongs {
public String name;
public int imageId;
public int songRawId;

public MySongs(String name, int imageId, int songRawId) {
    this.name = name;
    this.imageId = imageId;
    this.songRawId = songRawId;
}    

}

然后你可以使用你的歌曲列表：

List<MySongs> songs = new ArrayList<MySongs>();

在 onCreate 你可以添加所有你想要的歌曲：

songs.add(new MySongs("name1", R.mipmap.ic_launcher, R.raw.song1));
songs.add(new MySongs("name2", R.mipmap.ic_launcher, R.raw.song2));
...

之后，您可以将此列表放入您的 listAdapter。在 OnItemClick 中只需执行 MySongs selectedSong = songs.get(position);

然后您将获得有关所选歌曲的所有信息。您可以以selectedSong.name 为例获得它们