我想在用户滑动时在ViewPager创建一个音乐播放器，播放器应播放下一首歌曲。视图正确更新但歌曲未与它们同步。例如，它正在播放第一首片段中的第二首歌曲。我尝试了很多东西，但我无法找到问题所在。请有人给我一个解决方案。提前致谢。
public class AudioActivity extends AppCompatActivity {
List<PlayerModel> audioList;
int position;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_audio);
audioList=getIntent().getParcelableArrayListExtra(getString(R.string.SONG_LIST));
position=getIntent().getIntExtra(getString(R.string.SONG_POSITION),0);
final ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
}
AudioActivity.ViewPagerAdapter adapter;
private void setupViewPager(ViewPager viewPager) {
adapter = new AudioActivity.ViewPagerAdapter(getSupportFragmentManager());
AudioPlayerAdapter audioPlayerAdapter=new AudioPlayerAdapter();
for(int i=0;i<audioList.size();i++) {
adapter.addFragment(audioPlayerAdapter.newInstance(audioList, i), AppConstants.AUDIO_PLAYER);
}
viewPager.setAdapter(adapter);
viewPager.setPageTransformer(true, new CubeInTransformer());
}
class ViewPagerAdapter extends FragmentStatePagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
public void setFragment(Fragment fragment, int position,String title) {
mFragmentList.set(position,fragment);
mFragmentTitleList.set(position,title);
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
我的片段
public class AudioPlayerAdapter extends Fragment implements SeekBar.OnSeekBarChangeListener {
Button btnStart, btnStop, btnBind, btnUnbind, btnUpby1, btnUpby10;
TextView textStatus, textIntValue, textStrValue;
Messenger mService = null;
boolean mIsBound;
public static Handler messageHandler;
long duration, currSongPosition;
ImageView displayArt;
TextView playerName;
TextView totTime;
TextView fromTime;
List<PlayerModel> songList;
RecyclerView songRecyclerView;
ImageButton showList;
ImageButton playAudio;
ImageButton pauseAudio;
ImageButton stepForward;
ImageButton stepBackward;
ImageButton shuffleAudio;
ImageButton volumeAudio;
ImageButton repeatAudio;
int songPosition;
SeekBar songProgressBar;
SeekBar volumeSeekBar;
private Intent playIntent;
//binding
private boolean musicBound = false;
private float x1, x2;
static final int MIN_DISTANCE = 150;
//activity and playback pause flags
private boolean paused = false, playbackPaused = false;
private Handler mHandler = new Handler();
private int seekForwardTime = 5000; // 5000 milliseconds
private int seekBackwardTime = 5000; // 5000 milliseconds
private int currentSongIndex = 0;
private boolean isShuffle = false;
private boolean isRepeat = false;
public AudioPlayerAdapter newInstance(List<PlayerModel> playerList, int position) {
AudioPlayerAdapter fragment = new AudioPlayerAdapter();
Bundle b = new Bundle();
b.putParcelableArrayList(AppConstants.SONG_LIST, (ArrayList<? extends Parcelable>) playerList);
b.putInt(AppConstants.SONG_POSITION, position);
fragment.setArguments(b);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View view = inflater.inflate(R.layout.activity_music_player, container, false);
songList = getArguments().getParcelableArrayList(getString(R.string.SONG_LIST));
songPosition = getArguments().getInt(getString(R.string.SONG_POSITION), 0);
LogUtil.error("Song Position",songPosition+"-->"+songList.get(songPosition).getPlayerTitle());
FieldIntialization(view);
if (playIntent == null) {
playIntent = new Intent(getActivity(), MusicService.class);
playIntent.setAction(String.valueOf(MusicService.MSG_FOREGROUND));
playIntent.putParcelableArrayListExtra(getString(R.string.SONG_LIST), (ArrayList<? extends Parcelable>) songList);
playIntent.putExtra(getString(R.string.SONG_POSITION), songPosition);
getActivity().startService(playIntent);
}
DataInitialization(songPosition);
messageHandler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case MusicService.MSG_SET_INT_VALUE:
break;
case MusicService.MSG_PLAY:
LogUtil.error("Pause", "Pause");
playAudio.setImageResource(R.drawable.ic_pause_white_24dp);
break;
case MusicService.MSG_PAUSE:
LogUtil.error("Play", "Play");
playAudio.setImageResource(R.drawable.ic_play_white_24dp);
break;
case MusicService.MSG_NEXT:
songPosition = msg.getData().getInt(getString(R.string.SONG_POSITION));
LogUtil.error("SonPos", String.valueOf(songPosition));
updatePlayerView(songPosition);
break;
case MusicService.MSG_PREVIOUS:
songPosition = msg.getData().getInt(getString(R.string.SONG_POSITION));
LogUtil.error("SonPos", String.valueOf(songPosition));
updatePlayerView(songPosition);
break;
case MusicService.MSG_UPDATE_SEEKBAR:
duration = msg.getData().getLong(getString(R.string.SONG_DURATION));
currSongPosition = msg.getData().getLong(getString(R.string.SONG_CURR_DURATION));
break;
case MusicService.MSG_SHUFFLE_OFF:
Toast.makeText(getActivity(), "Shuffle Off", Toast.LENGTH_SHORT).show();
break;
case MusicService.MSG_SHUFFLE_ON:
Toast.makeText(getActivity(), "Shuffle On", Toast.LENGTH_SHORT).show();
break;
case MusicService.MSG_REPEAT_ON:
Toast.makeText(getActivity(), "Repeat On", Toast.LENGTH_SHORT).show();
break;
case MusicService.MSG_REPEAT_OFF:
Toast.makeText(getActivity(), "Repeat Off", Toast.LENGTH_SHORT).show();
break;
case MusicService.MSG_CLOSE:
getActivity().finish();
break;
case MusicService.MSG_STOP:
break;
default:
super.handleMessage(msg);
}
}
};
return view;
}
/* @Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
*//* outState.putString("textStatus", textStatus.getText().toString());
outState.putString("textIntValue", textIntValue.getText().toString());
outState.putString("textStrValue", textStrValue.getText().toString());*//*
}
private void restoreMe(Bundle state) {
if (state != null) {*//*
textStatus.setText(state.getString("textStatus"));
textIntValue.setText(state.getString("textIntValue"));
textStrValue.setText(state.getString("textStrValue"));*//*
}
}*/
public void stopService() {
getActivity().stopService(new Intent(getActivity(), MusicService.class));
}
private void sendMessageToService(int action) {
Intent startIntent = new Intent(getActivity(), MusicService.class);
startIntent.setAction(String.valueOf(action));
getActivity().startService(startIntent);
}
private void sendMessageToServiceWithData(int action, int currPosition) {
Intent startIntent = new Intent(getActivity(), MusicService.class);
startIntent.setAction(String.valueOf(action));
startIntent.putExtra(getString(R.string.SEEK_POSITION), currPosition);
getActivity().startService(startIntent);
}
private void FieldIntialization(View view) {
songProgressBar = (SeekBar) view.findViewById(R.id.seekBar);
volumeSeekBar = (SeekBar) view.findViewById(R.id.volumeSeekBar);
displayArt = (ImageView) view.findViewById(R.id.songImage);
playerName = (TextView) view.findViewById(R.id.songName);
totTime = (TextView) view.findViewById(R.id.endTime);
fromTime = (TextView) view.findViewById(R.id.startTime);
songRecyclerView = (RecyclerView) view.findViewById(R.id.songRecyclerView);
showList = (ImageButton) view.findViewById(R.id.showList);
stepForward = (ImageButton) view.findViewById(R.id.step_next);
stepBackward = (ImageButton) view.findViewById(R.id.step_prev);
shuffleAudio = (ImageButton) view.findViewById(R.id.shuffle);
repeatAudio = (ImageButton) view.findViewById(R.id.repeat);
playAudio = (ImageButton) view.findViewById(R.id.play_pause);
volumeAudio = (ImageButton) view.findViewById(R.id.speaker);
playAudio.setImageResource(R.drawable.ic_pause_white_24dp);
songRecyclerView.addItemDecoration(new MarginDecoration(getActivity()));
songRecyclerView.setHasFixedSize(true);
songRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(),
LinearLayoutManager.HORIZONTAL, false));
SongRecyclerAdapter songRecyclerAdapter = new SongRecyclerAdapter(songList,
getActivity()
);
if (songList.size() > 0) {
LinearLayout.LayoutParams lp =
new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
songRecyclerView.setLayoutParams(lp);
} else {
LinearLayout.LayoutParams lp =
new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
songRecyclerView.setLayoutParams(lp);
}
songRecyclerView.setAdapter(songRecyclerAdapter);
songRecyclerAdapter.setOnDataChangeListener(new onRefreshFavListener() {
@Override
public void onFavRefresh(int position) {
playIntent = new Intent(getActivity(), MusicService.class);
playIntent.setAction(String.valueOf(MusicService.MSG_FOREGROUND));
playIntent.putParcelableArrayListExtra(getString(R.string.SONG_LIST), (ArrayList<? extends Parcelable>) songList);
playIntent.putExtra(getString(R.string.SONG_POSITION), position);
getActivity().startService(playIntent);
updatePlayerView(position);
}
});
}
private void DataInitialization(final int position) {
showList.setBackgroundResource(R.drawable.ic_up_white_24dp);
showList.setTag(R.drawable.ic_up_white_24dp);
songRecyclerView.setVisibility(View.GONE);
LogUtil.error("Update",position+"-->"+songList.get(position));
updatePlayerView(position);
showList.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if ((int) showList.getTag() == R.drawable.ic_up_white_24dp) {
showList.setBackgroundResource(R.drawable.ic_down_white_24dp);
showList.setTag(R.drawable.ic_down_white_24dp);
songRecyclerView.setVisibility(View.VISIBLE);
} else {
showList.setBackgroundResource(R.drawable.ic_up_white_24dp);
showList.setTag(R.drawable.ic_up_white_24dp);
songRecyclerView.setVisibility(View.GONE);
}
}
});
songProgressBar.setOnSeekBarChangeListener(this);
final AudioManager audioManager = (AudioManager) getActivity().getSystemService(Context.AUDIO_SERVICE);
volumeSeekBar.setMax(audioManager
.getStreamMaxVolume(AudioManager.STREAM_MUSIC));
volumeSeekBar.setProgress(audioManager
.getStreamVolume(AudioManager.STREAM_MUSIC));
volumeSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar arg0) {
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
}
@Override
public void onProgressChanged(SeekBar arg0, int progress, boolean arg2) {
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,
progress, 0);
}
});
playAudio.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
sendMessageToService(MusicService.MSG_CHECK_PLAYING_STATUS);
}
});
stepForward.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendMessageToService(MusicService.MSG_NEXT);
}
});
stepBackward.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendMessageToService(MusicService.MSG_PREVIOUS);
}
});
shuffleAudio.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendMessageToService(MusicService.MSG_SHUFFLE);
}
});
repeatAudio.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendMessageToService(MusicService.MSG_REPEAT);
}
});
}
public void updatePlayerView(int songIndex) {
playAudio.setImageResource(R.drawable.ic_pause_white_24dp);
LogUtil.error("Song List",songIndex+"-->"+songList.get(songIndex).getPlayerTitle());
playerName.setText(songList.get(songIndex).getPlayerTitle());
totTime.setText(Utility.convertDuration(Long.parseLong(songList.get(songIndex).getPlayerDuration())));
Cursor cursor = getActivity().getContentResolver().query(MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI,
new String[]{MediaStore.Audio.Albums._ID, MediaStore.Audio.Albums.ALBUM_ART},
MediaStore.Audio.Albums._ID + "=?",
new String[]{String.valueOf(songList.get(songIndex).getPlayerAlbumId())},
null);
cursor.moveToFirst();
displayArt.setScaleType(ImageView.ScaleType.FIT_XY);
displayArt.setImageBitmap(Constants.getDefaultAlbumArt(getActivity(), songList.get(songIndex).getPlayerAlbumId()));
songProgressBar.setProgress(0);
songProgressBar.setMax(100);
// Updating progress bar
updateProgressBar();
}
public void updateProgressBar() {
// mHandler.postDelayed(mUpdateTimeTask, 100);
}
/**
* Background Runnable thread
*/
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
sendMessageToService(MusicService.MSG_UPDATE_SEEKBAR);
// Displaying Total Duration time
totTime.setText("" + Utility.milliSecondsToTimer(duration));
// Displaying time completed playing
fromTime.setText("" + Utility.milliSecondsToTimer(currSongPosition));
// Updating progress bar
int progress = (int) (Utility.getProgressPercentage(currSongPosition, duration));
//Log.d("Progress", ""+progress);
songProgressBar.setProgress(progress);
// Running this thread after 100 milliseconds
mHandler.postDelayed(this, 100);
}
};
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {
}
/**
* When user starts moving the progress handler
*/
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// remove message Handler from updating progress bar
// mHandler.removeCallbacks(mUpdateTimeTask);
}
/**
* When user stops moving the progress hanlder
*/
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// mHandler.removeCallbacks(mUpdateTimeTask);
int currentPosition = Utility.progressToTimer(seekBar.getProgress(), (int) duration);
sendMessageToServiceWithData(MusicService.MSG_SEEK, currentPosition);
// update timer progress again
updateProgressBar();
}
}