Question

Hi Community，

我正在开发类似应用程序的应用程序。我正面临着一个问题滚动项目时回收视图中的问题。问题是均匀的特定于音频文件本身。这些文件与播放无关项目数据位置。请帮我解决这个问题。

MyAdapterClass：

@Override
    public void onBindViewHolder(SwappingHolder holder, int position) {
        MessageDetails messageData = messagesList.get(position);

        if (messageData != null) {
            switch (messageData.getMessageType()) {
                case MessageDetails.MESSAGE_TEXT_TYPE:
                    TextTypeViewHolder textViewHolder = (TextTypeViewHolder) holder;
                    textViewHolder.updateView(messageData);
                    break;
                case MessageDetails.MESSAGE_IMAGE_TYPE:
                    ImageTypeViewHolder imageViewHolder = (ImageTypeViewHolder) holder;
                    imageViewHolder.updateImageFile(messageData);
                    break;
                case MessageDetails.MESSAGE_AUDIO_TYPE:
                    AudioTypeViewHolder audioHolder = (AudioTypeViewHolder) holder;
                    audioHolder.initializeAudioPlayer(messageData);
                    break;
                case MessageDetails.MESSAGE_VIDEO_TYPE:
                    VideoTypeViewHolder videoHolder = (VideoTypeViewHolder) holder;
                    videoHolder.updateVideoMessage(messageData);
                    break;
                case MessageDetails.MESSAGE_LOCATION_TYPE:
                    MapTypeHolder mapHolder = (MapTypeHolder) holder;
                    mapHolder.loadMapThumbView(messageData);
                    break;
                case MessageDetails.MESSAGE_CONTACT_TYPE:
                    ContactsTypeHolder contactsHolder = (ContactsTypeHolder) holder;
                    contactsHolder.setContactData(messageData);
                    break;
                case MessageDetails.MESSAGE_FILE_TYPE:
                     FileTypeHolder fileTypeHolder = (FileTypeHolder)holder;
                     fileTypeHolder.updateFileData(messageData);
            }
        }
    }

MyHolderClass：

 public class AudioTypeViewHolder extends SwappingHolder implements View.OnClickListener, View.OnLongClickListener {
        SeekBar seekBar;
        TextView timer, tv_time;
        ImageView btn_play, iv_smile;
        CardView cardView;
        RelativeLayout parentView;
        CustomizedAudioPlayer player;
        MessageDetails messageDetails;
        MediaPlayer mediaPlayer;

        public AudioTypeViewHolder(View itemView) {
            super(itemView, multiSelector);
            this.timer = (TextView) itemView.findViewById(R.id.timer);
            this.seekBar = (SeekBar) itemView.findViewById(R.id.audio_seekBar);
            this.btn_play = (ImageView) itemView.findViewById(R.id.btnPlay);
            this.tv_time = (TextView) itemView.findViewById(R.id.timeright);
            this.cardView = (CardView) itemView.findViewById(R.id.card_view);
            this.parentView = (RelativeLayout) itemView.findViewById(R.id.parent_view);
            this.iv_smile  =(ImageView) itemView.findViewById(R.id.smile1);
            this.mediaPlayer = new MediaPlayer();

            btn_play.setOnClickListener(this);
            player = new CustomizedAudioPlayer(mediaPlayer, seekBar, btn_play, timer);
            itemView.setOnLongClickListener(this);
            itemView.setLongClickable(true);
            btn_play.setOnLongClickListener(this);
            btn_play.setLongClickable(true);
        }

        void initializeAudioPlayer(MessageDetails messageDetails) {
            int colorId, gravity;
            this.messageDetails = messageDetails;

                if(messageDetails.getAudioPlayer() == null)
                    messageDetails.setAudioPlayer(player);

                if (messageDetails.getSender().equals("to")) {
                    colorId = mContext.getResources().getColor(R.color.color_recevied_item);
                    gravity = Gravity.LEFT;
                    iv_smile.setVisibility(View.GONE);
                } else {
                    colorId = mContext.getResources().getColor(R.color.color_sent_item);
                    gravity = Gravity.RIGHT;
                    iv_smile.setVisibility(View.VISIBLE);
                    iv_smile.setBackgroundResource(updateMessageStatus(messageDetails.getMstatus()));
                }

                player.initializePlayer(messageDetails.getMessage());
                tv_time.setText(messageDetails.getTime());
                cardView.setCardBackgroundColor(colorId);
                parentView.setGravity(gravity);
        }

        @Override
        public void onClick(View view) {
            int id = view.getId();
            if (id == R.id.btnPlay) {

                if (!mediaPlayer.isPlaying()) {
                    // check my player is playing
                    //if not, stop if any other player is playing
                    for (MessageDetails messageDetails : messagesList) {
                        CustomizedAudioPlayer customPlayer = messageDetails.getAudioPlayer();
                        if(customPlayer != null)
                            customPlayer.stopTheMediaPlay();
                    }

                    //start my player
                    btn_play.setImageResource(R.drawable.img_pause);
                    player.startThePlayer();
                    notifyDataSetChanged();
                } else {
                    btn_play.setImageResource(R.drawable.img_play);
                    player.stopTheMediaPlay();
                }
            }
        }

        @Override
        public boolean onLongClick(View view) {
            onItemLongPressed(this, messageDetails);
            return true;
        }
    }

我的自定义音频播放器

public class CustomizedAudioPlayer implements SeekBar.OnSeekBarChangeListener,MediaPlayer.OnCompletionListener, MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener {
    private Handler myHandler = new Handler();
    SeekBar seekbar;
    MediaPlayer mediaPlayer;
    boolean isPaused;
    ImageView playBtn;
    TextView timer;
    StringBuilder mFormatBuilder;
    Formatter mFormatter;
    int totalDuration, currentDuration;
    String path, chatId;

    public  CustomizedAudioPlayer(MediaPlayer mediaPlayer, SeekBar seekbar, ImageView view, TextView timer){
        this.seekbar = seekbar;
        this.playBtn = view;
        this.timer = timer;
        this.mediaPlayer = mediaPlayer;

        mFormatBuilder = new StringBuilder();
        mFormatter = new Formatter(mFormatBuilder, Locale.getDefault());

        this.seekbar.setProgress(0);
        this.seekbar.setMax(100);
        this.seekbar.setOnSeekBarChangeListener(this);
    }

    public void initializePlayer(String filePath){
        try{
            if(path == null){
                this.path = filePath;
                mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                mediaPlayer.setOnPreparedListener(this);
                mediaPlayer.setOnCompletionListener(this);
                mediaPlayer.setOnErrorListener(this);
                mediaPlayer.setDataSource(path);
                mediaPlayer.prepare();
                timer.setText(stringForTime( mediaPlayer.getDuration()));
            }
        }catch (Exception e){

        }
    }

    public void startThePlayer(){
        totalDuration = mediaPlayer.getDuration();
        mediaPlayer.seekTo(currentDuration);
        myHandler.postDelayed(updateProgress,100);
        mediaPlayer.start();
    }

    public void stopTheMediaPlay(){
        if(mediaPlayer.isPlaying()){
            playBtn.setImageResource(R.drawable.img_play);
            currentDuration = mediaPlayer.getCurrentPosition();
            timer.setText(stringForTime( mediaPlayer.getDuration()));
            myHandler.removeCallbacks(updateProgress);
            mediaPlayer.pause();
        }
    }

    @Override
    public void onCompletion(MediaPlayer mediaPlayer) {
        playBtn.setImageResource(R.drawable.img_play);
        seekbar.setProgress(0);
        timer.setText(stringForTime( mediaPlayer.getDuration()));
        myHandler.removeCallbacks(updateProgress);
    }

    @Override
    public void onPrepared(MediaPlayer mediaPlayer) {

    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
            if (mediaPlayer != null && mediaPlayer.isPlaying()) {
                myHandler.removeCallbacks(updateProgress);
                playBtn.setImageResource(R.drawable.img_play);
                mediaPlayer.pause();
                isPaused = true;
            }
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        currentDuration = progressToTimer(seekBar.getProgress(), totalDuration);
            if (mediaPlayer != null && mediaPlayer.isPlaying()) {
                if(fromUser){
                    mediaPlayer.seekTo(currentDuration);
                }
            } else if (mediaPlayer == null) {
                seekBar.setProgress(0);
            }
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        currentDuration = progressToTimer(seekBar.getProgress(), totalDuration);
            if (mediaPlayer.isPlaying() &&  mediaPlayer != null || (isPaused &&  mediaPlayer != null)) {
                isPaused = false;
                mediaPlayer.seekTo(currentDuration);
                myHandler.postDelayed(updateProgress,100);
                mediaPlayer.start();
                playBtn.setImageResource(R.drawable.img_pause);
            }
    }

    @Override
    public boolean onError(MediaPlayer mediaPlayer, int i, int i1) {
        return false;
    }

    private Runnable updateProgress = new Runnable() {

        public void run() {
            totalDuration = mediaPlayer.getDuration();
            currentDuration = mediaPlayer.getCurrentPosition();
            int progress = getProgressPercentage();

            float progressPer = ((float)progress/100);
            float newPosition = (totalDuration) * progressPer;

            seekbar.setProgress(progress);
            timer.setText(stringForTime( (int) newPosition));
            myHandler.postDelayed(this, 100);
        }
    };


    private String stringForTime(int timeMs) {
        int totalSeconds = timeMs / 1000;

        int seconds = totalSeconds % 60;
        int minutes = (totalSeconds / 60) % 60;
        int hours   = totalSeconds / 3600;

        mFormatBuilder.setLength(0);
        if (hours > 0) {
            return mFormatter.format("%d:%02d:%02d", hours, minutes, seconds).toString();
        } else {
            return mFormatter.format("%02d:%02d", minutes, seconds).toString();
        }
    }

    public int getProgressPercentage(){
        long currentSeconds = (currentDuration / 1000);
        long totalSeconds = (totalDuration / 1000);
        Double percentage =(((double)currentSeconds)/totalSeconds)*100;
        return percentage.intValue();
    }

    public int progressToTimer(int progress, int totalDuration) {
        totalDuration = (totalDuration / 1000);
        int currentDuration = (int) ((((double)progress) / 100) * totalDuration);

        // return current duration in milliseconds
        return currentDuration * 1000;
    }
}

我甚至尝试过放置

setIsRecyclable（假）;

使用此项，项目的位置是稳定的，但播放音频文件时项目没有更新（即搜索栏，文件时间不更新）

您可以在以下屏幕截图中找到我的问题

查看Holders数据在RecyclerView中滚动时搞乱

0 个答案: