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私はAndroid開発には新しく、現在は単純なメディアプレイヤーアプリケーションを開発中です。新しい曲がAndroidで再生されているときに古い曲を停止するにはどうすればよいですか？
私のプロジェクトによれば、私は3つの断片を定義しています。最初のフラグメントは、Mediaplayerコントロールを表示し、その曲を再生するPlayerフラグメントです。第2の断片は、歌曲リストを含むプレイリストである。第3の断片は最近再生された曲を含む最近の再生リストである。
私の質問は、新しい曲がプレイリストの断片から選択されたときに古い曲の再生を停止する方法です。
プレイヤーフラグメント。
public class Player extends Fragment implements SeekBar.OnSeekBarChangeListener{
private ImageButton btnPlay;
private ImageButton btnForward;
private ImageButton btnBackward;
private ImageButton btnNext;
private ImageButton btnPrevious;
private ImageButton btnRepeat;
private ImageButton btnShuffle;
private SeekBar songProgressBar;
private TextView songTitleLabel;
private TextView songCurrentDurationLabel;
private TextView songTotalDurationLabel;
// Media Player
public static MediaPlayer mp,mp2;
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;
SongAdapter songAdapter;
public Player(int position) {
songIndex = position;
}
public Player() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View android = inflater.inflate(R.layout.player, container, false);
/*ClickWheel wheel = (ClickWheel) android.findViewById(R.id.wheel);
wheel.getModel().addListener(this);*/
// variable initialization for button
return android;
}
@Override
public void onViewCreated(View v, Bundle savedInstanceState) {
super.onViewCreated(v, savedInstanceState);
btnPlay = (ImageButton)getView().findViewById(R.id.btnPlay);
btnForward = (ImageButton) getView().findViewById(R.id.btnForward);
btnBackward = (ImageButton) getView().findViewById(R.id.btnBackward);
btnNext = (ImageButton) getView().findViewById(R.id.btnNext);
btnPrevious = (ImageButton) getView().findViewById(R.id.btnPrevious);
btnRepeat = (ImageButton) getView().findViewById(R.id.btnRepeat);
btnShuffle = (ImageButton) getView().findViewById(R.id.btnShuffle);
songProgressBar = (SeekBar) getView().findViewById(R.id.songProgressBar);
songTitleLabel = (TextView) getView().findViewById(R.id.songTitle);
songTitleLabel.setSelected(true);
songTitleLabel.setEllipsize(TextUtils.TruncateAt.MARQUEE);
songTitleLabel.setSingleLine(true);
songCurrentDurationLabel = (TextView) getView().findViewById(R.id.songCurrentDurationLabel);
songTotalDurationLabel = (TextView) getView().findViewById(R.id.songTotalDurationLabel);
mp = new MediaPlayer();
songManager = new SongsManager();
utils = new Utilities();
songProgressBar.setOnSeekBarChangeListener(this);
songsList = songManager.getPlayList();
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);
}
}
});
}
public void playSong(int songIndex) {
try {
Log.e("playSong()...", "....is called");
mp.reset();
mp.setDataSource(songsList.get(songIndex).getSongPath());
mp.prepare();
songProgressBar.setProgress(0);
songProgressBar.setMax(100);
String songTitle = songsList.get(songIndex).getSongTitle();
songTitleLabel.setText(songTitle);
btnPlay.setImageResource(R.drawable.btn_pause);
mp.start();
updateProgressBar();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
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);
}
};
private void updateProgressBar() {
mHandler.postDelayed(mUpdateTimeTask, 100);
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
}
public void onStartTrackingTouch(SeekBar seekBar) {
mHandler.removeCallbacks(mUpdateTimeTask);
}
public void onStopTrackingTouch(SeekBar seekBar) {
mHandler.removeCallbacks(mUpdateTimeTask);
int totalDuration = mp.getDuration();
int currentPosition = utils.progressToTimer(seekBar.getProgress(), totalDuration);
mp.seekTo(currentPosition);
updateProgressBar();
}}
public class Playlists extends ListFragment {
EditText edtSearch;
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);
getListView().setFastScrollEnabled(true);
//ListView animation
LayoutAnimationController controller
= AnimationUtils.loadLayoutAnimation(
getActivity(), R.anim.list_layout_controller);
getListView().setLayoutAnimation(controller);
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);
}
songAdapter = new SongAdapter(getActivity(),songsList);
setListAdapter(songAdapter);
// selecting single ListView item
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) {
Log.i("Index", "..." + position);
songAdapter.setSelectedIndex(position);
Intent i = new Intent(getActivity().getApplicationContext(),Main.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_NEW_TASK);
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);
/*Player.mp.stop();
Player.mp.release();*/
//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());
getActivity().finish();
}
});
lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
removeItemFromList(position);
return true;
}
private void removeItemFromList(int position) {
final int deletePosition = position;
AlertDialog.Builder alert = new AlertDialog.Builder(
getActivity());
alert.setTitle("Delete");
alert.setMessage("Do you want delete this song?");
alert.setPositiveButton("YES", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TOD O Auto-generated method stub
// main code on after clicking yes
songsList.remove(deletePosition);
songAdapter.notifyDataSetChanged();
songAdapter.notifyDataSetInvalidated();
}
});
alert.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.dismiss();
}
});
alert.show();
}
});
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);
}
});
}
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (this.isVisible()) {
// If we are becoming invisible, then...
Log.d("setUserVisibleHint()...", "PlayList...Visible");
if (!isVisibleToUser) {
Log.d("setUserVisibleHint()...", "PlayList...notVisible");
// TODO stop audio playback
}
}
}
誰もがこれを行う方法を知っていればPLAYLISTフラグメント、私を助けて。あなたのプレイリストフラグメントで
感謝をこの
Player.mp.release();編集してリストビューonItemCLickListnerを削除...... –