如何在列表视图中添加最近播放的歌曲？
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【中文标题】如何在列表视图中添加最近播放的歌曲？【英文标题】：How to add recently played song in listview? 【发布时间】：2017-01-11 05:29:39 【问题描述】：我是 android 开发的新手，目前我正在 android 中实现简单的音乐播放器应用程序。所以，我的问题是我在这个音乐播放器中使用片段，我想在另一个列表视图片段中添加最近播放的歌曲。
这是我的主要播放器片段类......
private ImageButton btnPlay;
private ImageButton btnForward;
private ImageButton btnBackward;
private ImageButton btnNext;
private ImageButton btnPrevious;
private ImageButton btnPlaylist;
private ImageButton btnRepeat;
private ImageButton btnShuffle;
private SeekBar songProgressBar;
private TextView songTitleLabel;
private TextView songCurrentDurationLabel;
private TextView songTotalDurationLabel;
// Media Player
private MediaPlayer mp;
VisualizerView mVisualizerView;
SliderView sl;
private Visualizer mVisualizer;
// Handler to update UI timer, progress bar etc,.
private Handler mHandler = new Handler();;
private SongsManager songManager;
private Utilities utils;
private int seekForwardTime = 5000; // 5000 milliseconds
private int seekBackwardTime = 5000; // 5000 milliseconds
private int currentSongIndex = 0;
private boolean isShuffle = false;
private boolean isRepeat = false;
private ArrayList<SongModel> songsList = new ArrayList<SongModel>();
int songIndex;
private AudioManager audioManager = null;
SongAdapter songAdapter;
public Player(int position)
songIndex = position;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
View android = inflater.inflate(R.layout.player, container, false);
super.onCreate(savedInstanceState);
// variable initialization for button
btnPlay = (ImageButton) android.findViewById(R.id.btnPlay);
btnForward = (ImageButton) android.findViewById(R.id.btnForward);
btnBackward = (ImageButton) android.findViewById(R.id.btnBackward);
btnNext = (ImageButton) android.findViewById(R.id.btnNext);
btnPrevious = (ImageButton) android.findViewById(R.id.btnPrevious);
btnRepeat = (ImageButton) android.findViewById(R.id.btnRepeat);
btnShuffle = (ImageButton) android.findViewById(R.id.btnShuffle);
songProgressBar = (SeekBar) android.findViewById(R.id.songProgressBar);
songTitleLabel = (TextView) android.findViewById(R.id.songTitle);
songTitleLabel.setEllipsize(TextUtils.TruncateAt.MARQUEE);
songTitleLabel.setSingleLine(true);
songCurrentDurationLabel = (TextView)android.findViewById(R.id.songCurrentDurationLabel);
songTotalDurationLabel = (TextView) android.findViewById(R.id.songTotalDurationLabel);
mVisualizerView = (VisualizerView) android.findViewById(R.id.myvisualizerview);
audioManager = (AudioManager)getActivity().getSystemService(Context.AUDIO_SERVICE);
//get bundle data
/*Bundle b = getArguments();
int position = b.getInt("songIndex");
Log.i("position...","...."+position);*/
//Log.i("songIndex...","...."+);
//sliding finger up and increase and decrease volume
android.setOnTouchListener(new View.OnTouchListener()
public boolean onTouch(View v, MotionEvent event)
int action = MotionEventCompat.getActionMasked(event);
if (action == MotionEvent.ACTION_MOVE)
// put your volume change logic here, for example compare previously recorded x/y position to new one and change volume
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, 5, 0);
return true;
);
//Visualizer method
mp = new MediaPlayer();
initAudio();
// Mediaplayer
songManager = new SongsManager();
utils = new Utilities();
// Listeners
songProgressBar.setOnSeekBarChangeListener(this); // Important
mp.setOnCompletionListener(this); // Important
// Getting all songs list
songsList = songManager.getPlayList();
// By default play first song
if (songIndex==0)
playSong(0);
else
playSong(songIndex);
btnPlay.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
// check for already playing
if (mp.isPlaying())
if (mp != null)
mp.pause();
btnPlay.setImageResource(R.drawable.btn_play);
else
// Resume song
if (mp != null)
mp.start();
btnPlay.setImageResource(R.drawable.btn_pause);
);
btnForward.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
int currentPosition = mp.getCurrentPosition();
if(currentPosition + seekForwardTime <= mp.getDuration())
mp.seekTo(currentPosition + seekForwardTime);
else
mp.seekTo(mp.getDuration());
);
btnBackward.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
int currentPosition = mp.getCurrentPosition();
if(currentPosition - seekBackwardTime >= 0)
mp.seekTo(currentPosition - seekBackwardTime);
else
mp.seekTo(0);
);
btnNext.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
if(currentSongIndex < (songsList.size() - 1))
playSong(currentSongIndex + 1);
currentSongIndex = currentSongIndex + 1;
else
playSong(0);
currentSongIndex = 0;
);
btnPrevious.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
if(currentSongIndex > 0)
playSong(currentSongIndex - 1);
currentSongIndex = currentSongIndex - 1;
else
playSong(songsList.size() - 1);
currentSongIndex = songsList.size() - 1;
);
btnRepeat.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
if(isRepeat)
isRepeat = false;
Toast.makeText(getActivity().getApplicationContext(), "Repeat is OFF", Toast.LENGTH_SHORT).show();
btnRepeat.setImageResource(R.drawable.btn_repeat);
else
isRepeat = true;
Toast.makeText(getActivity().getApplicationContext(), "Repeat is ON", Toast.LENGTH_SHORT).show();
isShuffle = false;
btnRepeat.setImageResource(R.drawable.btn_repeat_focused);
btnShuffle.setImageResource(R.drawable.btn_shuffle);
);
btnShuffle.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
if(isShuffle)
isShuffle = false;
Toast.makeText(getActivity().getApplicationContext(), "Shuffle is OFF", Toast.LENGTH_SHORT).show();
btnShuffle.setImageResource(R.drawable.btn_shuffle);
else
isShuffle= true;
Toast.makeText(getActivity().getApplicationContext(), "Shuffle is ON", Toast.LENGTH_SHORT).show();
isRepeat = false;
btnShuffle.setImageResource(R.drawable.btn_shuffle_focused);
btnRepeat.setImageResource(R.drawable.btn_repeat);
);
return android;
private void initAudio()
getActivity().setVolumeControlStream(AudioManager.STREAM_MUSIC);
mp = MediaPlayer.create(getActivity(),R.raw.test);
mp.setLooping(true);
setupVisualizerFxAndUI();
mVisualizer.setEnabled(true);
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
public void onCompletion(MediaPlayer mediaPlayer)
mVisualizer.setEnabled(false);
);
mp.start();
private void setupVisualizerFxAndUI()
mVisualizer = new Visualizer(mp.getAudiosessionId());
mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);
mVisualizer.setDataCaptureListener(
new Visualizer.OnDataCaptureListener()
public void onWaveFormDataCapture(Visualizer visualizer,
byte[] bytes, int samplingRate)
mVisualizerView.updateVisualizer(bytes);
public void onFftDataCapture(Visualizer visualizer,
byte[] bytes, int samplingRate)
, Visualizer.getMaxCaptureRate() / 2, true, false);
@Override
public void onActivityResult(int requestCode,
int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == 100)
currentSongIndex = data.getExtras().getInt("songIndex");
// play selected song
playSong(currentSongIndex);
public void playSong(int songIndex)
try
mp.reset();
mp.setDataSource(songsList.get(songIndex).getSongPath());
mp.prepare();
mp.start();
String songTitle = songsList.get(songIndex).getSongTitle();
songTitleLabel.setText(songTitle);
btnPlay.setImageResource(R.drawable.btn_pause);
songProgressBar.setProgress(0);
songProgressBar.setMax(100);
updateProgressBar();
catch (IllegalArgumentException e)
e.printStackTrace();
catch (IllegalStateException e)
e.printStackTrace();
catch (IOException e)
e.printStackTrace();
private void updateProgressBar()
mHandler.postDelayed(mUpdateTimeTask,100);
private Runnable mUpdateTimeTask = new Runnable()
public void run()
long totalDuration = mp.getDuration();
long currentDuration = mp.getCurrentPosition();
songTotalDurationLabel.setText(""+utils.milliSecondsToTimer(totalDuration));
songCurrentDurationLabel.setText(""+utils.milliSecondsToTimer(currentDuration));
int progress = (int)(utils.getProgressPercentage(currentDuration, totalDuration));
songProgressBar.setProgress(progress);
mHandler.postDelayed(this,100);
;
@Override
public void onCompletion(MediaPlayer mp)
if(isRepeat)
playSong(currentSongIndex);
else if(isShuffle)
Random rand = new Random();
currentSongIndex = rand.nextInt((songsList.size() - 1) - 0 + 1) + 0;
playSong(currentSongIndex);
else
if(currentSongIndex < (songsList.size() - 1))
playSong(currentSongIndex + 1);
currentSongIndex = currentSongIndex + 1;
else
playSong(0);
currentSongIndex = 0;
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
@Override
public void onStartTrackingTouch(SeekBar seekBar)
mHandler.removeCallbacks(mUpdateTimeTask);
@Override
public void onStopTrackingTouch(SeekBar seekBar)
mHandler.removeCallbacks(mUpdateTimeTask);
int totalDuration = mp.getDuration();
int currentPosition = utils.progressToTimer(seekBar.getProgress(), totalDuration);
mp.seekTo(currentPosition);
updateProgressBar();
@Override
public void onDestroy()
super.onDestroy();
mHandler.removeCallbacks(mUpdateTimeTask);
if (mp != null)
if (mp.isPlaying()) mp.stop();
mp.reset();
mp.release();
public void onBackPressed()
new AlertDialog.Builder(getActivity())
.setIcon(R.drawable.musiclogo)
.setTitle("Closing M-Player")
.setMessage("Are you sure you want to close this application?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog, int which)
getActivity().finish();
)
.setNegativeButton("No",null)
.show();
这是我的播放列表（歌曲列表）片段和扩展列表片段
EditText edtSearch;
ListAdapter adapter;
SongAdapter songAdapter;
ArrayList<SongModel> songList = new ArrayList<SongModel>();
SongsManager songsManager = new SongsManager();
// Songs list
public ArrayList<SongModel> songsList = new ArrayList<>();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
View windows = inflater.inflate(R.layout.playlist, container, false);
return windows;
@Override
public void onViewCreated(View v, Bundle savedInstanceState)
super.onViewCreated(v, savedInstanceState);
edtSearch = (EditText)getView().findViewById(R.id.search);
final ArrayList<SongModel> songsListData = songsManager.songList;
Log.i("songsListData...",""+songsListData.size());
SongsManager plm = new SongsManager();
// get all songs from sdcard
this.songsList = plm.getPlayList();
// looping through playlist
for (int i = 0; i < songsListData.size(); i++)
// creating new HashMap
SongModel song = songsListData.get(i);
// adding HashList to ArrayList
songsListData.add(song);
// Adding menuItems to ListView
/* adapter = new SimpleAdapter(getActivity(), songsListData, R.layout.playlist_item, new String[] "songTitle" , new int[]
R.id.songTitle );*/
songAdapter = new SongAdapter(getActivity(),songsList);
setListAdapter(songAdapter);
// selecting single ListView item
final ListView lv = getListView();
// listening to single listitem click
lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
@Override
public void onItemClick(AdapterView<?> parent, View arg0,
int position, long id)
// getting listitem index
Log.i("Index", "..." + position);
// Starting new intent
Intent i = new Intent(getActivity().getApplicationContext(),Main.class);
SongModel songModel = (SongModel) songAdapter.getItem(position);
int indexOfSong = songAdapter.songsList.indexOf(songModel);
// Sending songIndex to PlayerActivity
i.putExtra("songIndex", indexOfSong);
getActivity().setResult(100, i);
startActivityForResult(i, 100);
);
edtSearch.addTextChangedListener(new TextWatcher()
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after)
@Override
public void onTextChanged(CharSequence cs, int start, int before, int count)
@Override
public void afterTextChanged(Editable s)
String text = edtSearch.getText().toString().toLowerCase(Locale.getDefault());
songAdapter.filter(text);
);
这是我的歌曲管理器课程。
public ArrayList<SongModel> songList = new ArrayList<SongModel>();
// SDCard Path
final String MEDIA_PATH = new String("/sdcard/");
// Constructor
public SongsManager()
public ArrayList<SongModel> getPlayList()
File home = new File(MEDIA_PATH);
if (home.listFiles(new FileExtensionFilter()).length > 0)
for (File file : home.listFiles(new FileExtensionFilter()))
SongModel setter = new SongModel();
setter.setSongPath(file.getPath());
setter.setSongTitle(file.getName().substring(0, (file.getName().length() - 4)));
songList.add(setter);
return songList;
class FileExtensionFilter implements FilenameFilter
public boolean accept(File dir, String name)
return (name.endsWith(".mp3") || name.endsWith(".MP3"));
这是我的歌曲适配器和扩展基本适配器。
Context context;
//private ArrayList<SongModel> songsList = null;
SongAdapter songAdapter;
private ArrayList<SongModel> songsListDat = null;
public ArrayList<SongModel> songsList;
private static LayoutInflater inflater;
public SongAdapter(FragmentActivity activity, ArrayList<SongModel> songsListDat)
this.context = activity;
this.songsListDat = songsListDat;
this.songsList = new ArrayList<SongModel>();
this.songsList.addAll(songsListDat);
@Override
public int getViewTypeCount()
return getCount();
@Override
public int getCount()
return songsListDat.size();
@Override
public Object getItem(int position)
return songsListDat.get(position);
@Override
public long getItemId(int position)
return position;
@Override
public int getItemViewType(int position)
return position;
@Override
public View getView(int position, View convertView, ViewGroup parent)
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.playlist_item, null);
TextView title = (TextView) vi.findViewById(R.id.songTitle); // title
SongModel song = new SongModel();
song = songsListDat.get(position);
// Setting all values in listview
title.setText(song.getSongTitle());
return vi;
如果有人知道这其中的逻辑，请帮助我。 提前致谢
【问题讨论】：
【参考方案1】：我终于做到了。这是我对此逻辑的更改
我创建了一个 Utility 常量类并全局传递这个数组列表。
public static ArrayList<SongModel> recentSongList = new ArrayList<SongModel>();
这是我的播放列表类，用于将点击的列表视图项发送到另一个列表视图
lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
@Override
public void onItemClick(AdapterView<?> parent, View arg0,
int position, long id)
Log.i("Index", "..." + position);
songAdapter.setSelectedIndex(position);
Intent i = new Intent(getActivity().getApplicationContext(),Main.class);
SongModel songModel = (SongModel) songAdapter.getItem(position);
int indexOfSong = songAdapter.songsList.indexOf(songModel);
// Sending songIndex to PlayerActivity
i.putExtra("songIndex", indexOfSong);
getActivity().setResult(100, i);
startActivityForResult(i, 100);
//putting song in recentSongList arraylist
SongModel model = (SongModel) songAdapter.getItem(position);
model.setSongTitle(songModel.getSongTitle());
model.setSongPath(songModel.getSongPath());
Constant.recentSongList.add(model);
Log.i("recentSongList...","..."+Constant.recentSongList.size());
);
这是我最近的播放列表片段，用于在列表视图中获取最近点击播放的歌曲
public class SingleItemView extends ListFragment
SongAdapter songAdapter;
SongsManager songsManager = new SongsManager();
public ArrayList<SongModel> songsList = new ArrayList<>();
public ArrayList<SongModel> recentSongList = Constant.recentSongList;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
View windows = inflater.inflate(R.layout.recent_playlist, container, false);
Log.i("recent Song List...","..."+recentSongList.size());
return windows;
@Override
public void onViewCreated(View v, Bundle savedInstanceState)
super.onViewCreated(v, savedInstanceState);
final ArrayList<SongModel> songsListData = songsManager.songList;
Log.i("songsListData...", "" + songsListData.size());
songAdapter = new SongAdapter(getActivity(),recentSongList);
setListAdapter(songAdapter);
final ListView lv = getListView();
lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
);
【讨论】：
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