我正在尝试在RecyclerView中实现音频（媒体播放器），但问题是它首先崩溃了，我试图在bindView持有人上实现代码，但是它占用了导致应用程序挂起和崩溃的所有资源，我也尝试过仍然以崩溃的方式进行操作
我正在尝试制作类似whatsapp的聊天应用程序，但是它不能以我尝试的方式工作
public class AdapterNewSingleChat extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
List<PojoNewChatMessage> data;
SharedPreferences shdUSer;
Context context;
DatabaseReference userRef;
private static final int MSG_UPDATE_SEEK_BAR = 1845;
private MediaPlayer mediaPlayer;
private Handler uiUpdateHandler;
private int playingPosition;
private SenderViewAudio playingHolder;
public AdapterNewSingleChat(Context context) {
this.context = context;
shdUSer = context.getSharedPreferences("user", Context.MODE_PRIVATE);
userRef = UserFirebase.databaseReference().child("User");
this.playingPosition = -1;
}
public void setData(List<PojoNewChatMessage> data) {
this.data = data;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
if (i == R.layout.single_sent_message_text) {
return new SenderViewMessage(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.single_sent_message_text, viewGroup, false));
} else if (i == R.layout.single_received_message_text) {
return new ReciverViewMessage(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.single_received_message_text, viewGroup, false));
} else if (i == R.layout.single_sent_message_audio) {
return new SenderViewAudio(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.single_sent_message_audio, viewGroup, false));
}
return null;
}
@Override
public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder viewHolder, final int i) {
if (viewHolder instanceof SenderViewMessage) {
((SenderViewMessage) viewHolder).txtSenderMessage.setText(data.get(i).getMessage());
((SenderViewMessage) viewHolder).txtSenderTime.setText(data.get(i).getTime());
}
if (viewHolder instanceof ReciverViewMessage) {
((ReciverViewMessage) viewHolder).txtReciverMessage.setText(data.get(i).getMessage());
((ReciverViewMessage) viewHolder).txtReciverTime.setText(data.get(i).getTime());
userRef.child(data.get(i).getFrom()).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
String name = dataSnapshot.child("name").getValue().toString();
((ReciverViewMessage) viewHolder).txtReciverName.setText(name);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
if (viewHolder instanceof SenderViewAudio){
if (i == playingPosition) {
playingHolder = ((SenderViewAudio)viewHolder);
// this view holder corresponds to the currently playing audio cell
// update its view to show playing progress
updatePlayingView();
} else {
// and this one corresponds to non playing
updateNonPlayingView(((SenderViewAudio)viewHolder));
}
}
}
@Override
public int getItemCount() {
return data.size();
}
@Override
public int getItemViewType(int position) {
if (data.get(position).getType().equals("txt")) {
if (data.get(position).getFrom().equals(shdUSer.getString("user_id", ""))) {
return R.layout.single_sent_message_text;
} else {
return R.layout.single_received_message_text;
}
}
if (data.get(position).getType().equals("audio")) {
if (data.get(position).getFrom().equals(shdUSer.getString("user_id", ""))) {
return R.layout.single_sent_message_audio;
} else {
return R.layout.single_recieved_message_audio;
}
}
return 0;
}
public class ReciverViewAudio extends RecyclerView.ViewHolder {
TextView txtTime, txtName;
ImageView imgPlay, imgPause;
ProgressBar progressBar;
public ReciverViewAudio(@NonNull View itemView) {
super(itemView);
txtTime = itemView.findViewById(R.id.txt_audio_reciver_text_time);
imgPlay = itemView.findViewById(R.id.img_single_messeage_reciver_audio_play);
imgPause = itemView.findViewById(R.id.img_single_messeage_reciver_audio_pause);
progressBar = itemView.findViewById(R.id.progressbar_single_reciver_messeage_audio);
txtName = itemView.findViewById(R.id.txt_reciver_text_name);
}
}
public class SenderViewAudio extends RecyclerView.ViewHolder implements View.OnClickListener, SeekBar.OnSeekBarChangeListener {
TextView txtTime;
ImageView imgPlay, imgPause;
SeekBar sbProgress;
public SenderViewAudio(@NonNull View itemView) {
super(itemView);
txtTime = itemView.findViewById(R.id.txt_single_messeage_audio_time);
imgPlay = itemView.findViewById(R.id.img_single_messeage_audio_play);
imgPause = itemView.findViewById(R.id.img_single_messeage_audio_pause);
sbProgress = itemView.findViewById(R.id.progressbar_single_messeage_audio);
sbProgress.setOnSeekBarChangeListener(this);
}
@Override
public void onClick(View v) {
if (getAdapterPosition() == playingPosition) {
// toggle between play/pause of audio
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
} else {
mediaPlayer.start();
}
} else {
// start another audio playback
playingPosition = getAdapterPosition();
if (mediaPlayer != null) {
if (null != playingHolder) {
updateNonPlayingView(playingHolder);
}
mediaPlayer.release();
}
playingHolder = this;
startMediaPlayer(data.get(playingPosition).getMessage());
}
updatePlayingView();
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (fromUser) {
mediaPlayer.seekTo(progress);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
}
public class ReciverViewMessage extends RecyclerView.ViewHolder {
TextView txtReciverMessage, txtReciverName, txtReciverTime;
public ReciverViewMessage(@NonNull View itemView) {
super(itemView);
txtReciverMessage = itemView.findViewById(R.id.txt_reciver_text_message);
txtReciverName = itemView.findViewById(R.id.txt_reciver_text_name);
txtReciverTime = itemView.findViewById(R.id.txt_reciver_text_time);
}
}
public class SenderViewMessage extends RecyclerView.ViewHolder {
TextView txtSenderMessage, txtSenderTime;
public SenderViewMessage(@NonNull View itemView) {
super(itemView);
txtSenderMessage = itemView.findViewById(R.id.txt_sender_text_message);
txtSenderTime = itemView.findViewById(R.id.txt_sender_message_time);
}
}
@Override
public void onViewRecycled(@NonNull RecyclerView.ViewHolder holder) {
super.onViewRecycled(holder);
if (playingPosition == holder.getAdapterPosition()) {
// view holder displaying playing audio cell is being recycled
// change its state to non-playing
if (playingHolder!=null)
updateNonPlayingView(playingHolder);
playingHolder = null;
}
}
//==================AUDIO=======================
private void updatePlayingView() {
playingHolder.sbProgress.setMax(mediaPlayer.getDuration());
playingHolder.sbProgress.setProgress(mediaPlayer.getCurrentPosition());
playingHolder.sbProgress.setEnabled(true);
if (mediaPlayer.isPlaying()) {
uiUpdateHandler.sendEmptyMessageDelayed(MSG_UPDATE_SEEK_BAR, 100);
playingHolder.imgPause.setVisibility(View.VISIBLE);
playingHolder.imgPlay.setVisibility(View.GONE);
} else {
uiUpdateHandler.removeMessages(MSG_UPDATE_SEEK_BAR);
playingHolder.imgPause.setVisibility(View.GONE);
playingHolder.imgPlay.setVisibility(View.VISIBLE);
}
}
private void updateNonPlayingView(SenderViewAudio holder) {
if (holder == playingHolder) {
uiUpdateHandler.removeMessages(MSG_UPDATE_SEEK_BAR);
}
holder.sbProgress.setEnabled(false);
holder.sbProgress.setProgress(0);
playingHolder.imgPause.setVisibility(View.GONE);
playingHolder.imgPlay.setVisibility(View.VISIBLE);
}
private void startMediaPlayer(String audioResId) {
mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(audioResId);
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
releaseMediaPlayer();
}
});
mediaPlayer.start();
}
private void releaseMediaPlayer() {
if (null != playingHolder) {
updateNonPlayingView(playingHolder);
}
mediaPlayer.release();
mediaPlayer = null;
playingPosition = -1;
}
}
以前，我已经在绑定视图持有人中尝试过
if (viewHolder instanceof SenderViewAudio) {
((SenderViewAudio) viewHolder).txtTime.setText(data.get(i).getTime());
((SenderViewAudio) viewHolder).imgPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setDataSource(context, Uri.parse(data.get(i).getMessage()));
player.prepare();
player.start();
} catch (Exception e) {
System.out.println(e.toString());
}
((SenderViewAudio) viewHolder).imgPlay.setVisibility(View.GONE);
((SenderViewAudio) viewHolder).imgPause.setVisibility(View.VISIBLE);
}
});
((SenderViewAudio) viewHolder).imgPause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
player.stop();
player.release();
((SenderViewAudio) viewHolder).imgPlay.setVisibility(View.VISIBLE);
((SenderViewAudio) viewHolder).imgPause.setVisibility(View.GONE);
}
});
}
答案 0 :(得分：-1)
不要在RecyclerView中播放音乐 通过在onClick事件中使用接口在活动或片段上进行操作