媒体播放器有奇怪的行为

Question

我有一个部分在我的应用程序，加载媒体播放器与URL在回收者视图。有时播放url mp3不是一个有效的文件，但我需要显示它没有任何东西既不播放mp3文件当然，因为它已经无效。我的问题是媒体播放器不能正常工作时使用准备Async即使它是一个有效的文件mp3它不工作，我知道它是因为重新加载相同的文件有时工作，有时不工作。代码>准备方法工作完美和准备Async不正常工作

@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();

        }
    }

Answer 1

我通过在模型中创建一个媒体播放器解决了这个问题，我在RecyclerView中使用了该模型，并且我在模型中执行了所有操作，如错误侦听器和prepareAsync，因为recycler视图重新创建了整个对象，这就是我的问题，prepareAsync现在工作得很好！，请注意，我将onPrepared回调保留在recycler视图中，并执行了类似的操作

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