Media Player行为异常

问题描述

我的应用程序中有一个部分，可在回收者视图中用url加载媒体播放器。 有时使用url mp3播放不是有效文件，但我需要在没有播放mp3文件的情况下显示它，因为它已经无效。 我的问题是使用prepareAsync时媒体播放器无法正常工作，即使它是有效的mp3文件，也无法正常工作，我知道这是因为重新加载相同的文件有时会工作，有时会无法工作。只要所有文件均有效，prepare方法就可以正常工作并且prepareAsync无法正常工作。这是我的recyclerview bindview持有人代码

@Override
    public void onBindViewHolder(AudioRecycleViewAdapter.ViewHolder viewHolder,final int position) {
        final MediaPlayer mp = new MediaPlayer();

        try {
            // Get the data model based on position
            final PlayAudioModel model = mVisitHistory.get(position);

            // Set item views based on your views and data model
            final ImageView playControllerImageView = viewHolder.playControllerImageView;
            final ProgressBar playProgressBar = viewHolder.playProgressBar;
            CircleImageView userImageView = viewHolder.userImageView;
            TextView timeTextView = viewHolder.timeTextView;
            final TextView durationTextView = viewHolder.durationTextView;

            if (model.getSenderType().equals("doctor")) {
                Glide.with(mContext).load(Constants.SERVER_IP + Constants.GET_DOCTOR_IMAGE_FOR_VISIT_HISTORY
                        .replace("{visitRequestId}","" + model.getVisitRequestId())
                        .replace("{doctorId}","" + model.getDoctorId())
                      ).into(userImageView);
                userImageView.setBorderColor(mContext.getResources().getColor(R.color.black));

            } else {
                Glide.with(mContext).load(Constants.SERVER_IP + Constants.GET_PATIENT_IMAGE
                       ).into(userImageView);
                userImageView.setBorderColor(mContext.getResources().getColor(R.color.colorPrimary));
            }
            timeTextView.setText(DateHelper.convertStringUtcToLocalDate(model.getTime()));


            mp.setOnErrorListener(new MediaPlayer.OnErrorListener() {
                @Override
                public boolean onError(MediaPlayer mp,int what,int extra) {
                    System.out.println();
                    return false;
                }
            });

            mp.setDataSource(Constants.SERVER_IP + Constants.PLAY_AUDIO
                   
                    .replace("{recordId}","" + model.getVoiceRecordId()));

            mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

                @Override
                public void onPrepared(final MediaPlayer mp) {


                    playProgressBar.setMax(mp.getDuration());

                    double mins = Math.floor((mp.getDuration() % (1000 * 60 * 60)) / (1000 * 60));
                    double secs = Math.floor((mp.getDuration() % (1000 * 60)) / 1000);
                    durationTextView.setText((int) mins + ":" + (int) secs);


                    final CountDownTimer mpTimer = new CountDownTimer(mp.getDuration(),1) {
                        @Override
                        public void onTick(long millisUntilFinished) {

                            playProgressBar.setProgress(mp.getDuration() - (int) millisUntilFinished);
                        }

                        @Override
                        public void onFinish() {
                            playControllerImageView.setImageDrawable(mContext.getDrawable(R.drawable.ic_play_circle));
                            playProgressBar.setProgress(0);

                        }
                    };
                    playControllerImageView.setOnClickListener(new View.OnClickListener() {


                        @Override
                        public void onClick(View v) {


                            if (!mp.isPlaying()) {

                                mpTimer.start();
                                mp.start();
                                playControllerImageView.setImageDrawable(mContext.getDrawable(R.drawable.ic_pause));
                            } else {
                                mp.pause();
                                mpTimer.cancel();
                                playProgressBar.setProgress(0);
                                playControllerImageView.setImageDrawable(mContext.getDrawable(R.drawable.ic_play_circle));

                            }

                        }
                    });

                }
            });
            mp.prepareAsync();

        } catch (Exception e) {
            e.printStackTrace();

        }
    }

解决方法

我通过在模型中创建媒体播放器来解决此问题，该模型在RecyclerView中使用，并且由于回收者视图重新创建了整个对象，因此我在模型中执行了所有操作，例如错误监听器和prepareAsync，问题，prepareAsync现在像魅力一样工作！，请注意，我在回收者视图中保留了onPrepared回调，而我做了类似的事情

musics.get(position).getMediaPlayer().setOnPreparedListener(...)