Android MediaPlayer减慢listview速度

我有一个

列表视图

，其中列出了录音。当我点击其中一个播放时，它就会从互联网上消失，检索音频并播放。播放时，滚动锁定

一旦

MediaPlayer

停止，我可以像正常一样滚动。这不是线程问题，因为

MediaPlayer

正在另一个线程上播放

这是MediaPlayer的异步任务：

private class PlayAudio extends AsyncTask<String, Integer, String> {
    @Override
    protected String doInBackground(String... params) {
        nowPlaying = true;

        player.setOnErrorListener(new MediaPlayer.OnErrorListener() {
            @Override
            public boolean onError(MediaPlayer mp, int what, int extra) {

                if(isAdded()) {
                    stopAudio();
                }

                PvmUtils.longToast(context, getString(R.string.error_load_msg));
                return false;
            }
        });

        player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                setButtonColors(2);
            }
        });

        player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                stopAudio();

                sendPostMessageRead(new Callbacks.SendPostMessageReadCallback() {
                    @Override
                    public void sendPostMessageReadCallback(boolean gotMessageReadResponse) {
                        if (gotMessageReadResponse) {
                            MessageLog message = log.get(listPosition);
                            message.setMessageStatus("read");

                            if (message.isReply()) {
                                currentMetaTextView.setText("");
                                MyFcmListenerService.newMessages--;
                                ShortcutBadger.applyCount(context, MyFcmListenerService.newMessages);
                            }

                        } else {
                            Log.d(LOG_TAG, "sendPostMessageReadCallback returned false, error may have occurred");
                        }
                    }
                });
            }
        });

        player.setAudioStreamType(AudioManager.STREAM_MUSIC);


        try {
            //Uri uri = Uri.parse(Keys.getpvmURL() + "android/retrieveMessage?messageId=" + params[0]);
            //player.setDataSource(params[0].replaceFirst("https","http"));
            Uri uri = Uri.parse(params[0]);
            Map<String, String> headers = new HashMap<>();
            headers.put("authorisation", encryption.getID().toString());
            player.setDataSource(context, uri, headers);

        } catch (IOException e) {
            e.printStackTrace();
            stopAudio();
        } try {
            player.prepare();
        } catch (IOException e) {
            e.printStackTrace();
            stopAudio();
        }

        player.start();
        return null;
    }
}

私有类PlayAudio扩展异步任务{
@凌驾
受保护的字符串doInBackground（字符串…参数）{
现在玩=真；
player.setOneRorListener（新的MediaPlayer.OneRorListener（）{
@凌驾
公共布尔onError（MediaPlayer mp，int what，int extra）{
if（isAdded（））{
停止音频（）；
}
longToast（上下文，getString（R.string.error\u load\u msg））；
返回false；
}
});
player.setOnPreparedListener（新的MediaPlayer.OnPreparedListener（）{
@凌驾
已准备好公开作废（MediaPlayer mp）{
退刀颜色（2）；
}
});
player.setOnCompletionListener（新的MediaPlayer.OnCompletionListener（）{
@凌驾
完成时的公共作废（MediaPlayer mp）{
停止音频（）；
sendPostMessageRead（新回调。SendPostMessageReadCallback（）{
@凌驾
public void sendpostmessageradcallback（布尔gotMessageReadResponse）{
if（gotMessageReadResponse）{
MessageLog message=log.get（listPosition）；
message.setMessageStatus（“读取”）；
if（message.isReply（））{
currentMetaTextView.setText（“”）；
MyFcmListenerService.newMessages--；
ShortcutBadger.applyCount（上下文，MyFcmListenerService.newMessages）；
}
}否则{
d（Log_标记，“sendpostmessageradcallback返回false，可能发生错误”）；
}
}
});
}
});
player.setAudioStreamType（AudioManager.STREAM_MUSIC）；
试一试{
//Uri=Uri.parse（Keys.getpvmURL（）+“android/retrieveMessage？messageId=“+params[0]）；
//player.setDataSource（参数[0].replaceFirst（“https”、“http”）；
Uri=Uri.parse（参数[0]）；
Map headers=newhashmap（）；
headers.put（“授权”，encryption.getID（）.toString（））；
setDataSource（上下文、uri、标题）；
}捕获（IOE异常）{
e、 printStackTrace（）；
停止音频（）；
}试一试{
player.prepare（）；
}捕获（IOE异常）{
e、 printStackTrace（）；
停止音频（）；
}
player.start（）；
返回null；
}
}

这是列表项的clicklistener：

    ListAdapter newAdapter = new ListAdapter(getActivity());

    if (this.log == null) {
        list.setAdapter(populateAdapter(newAdapter,new ArrayList<MessageLog>()));
    } else {
        list.setAdapter(populateAdapter(newAdapter,log));
    }


    list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Log.d(LOG_TAG, Integer.toString(position));

            if (log != null && position < log.size()) {
                if (!nowPlaying && log.get(position).getUrl() != null) {
                    try {
                        stopAudio();
                        setButtonColors(0, currentPlaying);

                        // Show the play controls.
                        currentPlaying = position;
                        nowPlaying = true;
                        player = new MediaPlayer();
                        player.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);
                        listPosition = position;
                        currentButton = view;
                        Log.d(LOG_TAG, log.get(position).getUrl());
                        /*
                        MessagePlaybackDialogFragment playFrag = MessagePlaybackDialogFragment.newInstance(log.get(listPosition),
                                new Callbacks.OnPlaybackFinishedListener() {
                            @Override
                            public void onPlaybackDone() {
                                // TODO set as not new
                            }
                        });
                        playFrag.show(getFragmentManager(), "playFrag");*/

//                            MessagePlaybackDialogFragment playFrag = MessagePlaybackDialogFragment.newInstance(log.get(listPosition));
//                            playFrag.show(getFragmentManager(), "playFrag");

                        currentMetaTextView = (TextView) view.findViewById(R.id.voiceMessageMetaText);
                        currentPlayPauseImageView = (ImageView) view.findViewById(R.id.voiceMessagePlayPauseImage);
                        currentMessageBackground = (RelativeLayout) view.findViewById(R.id.voiceMessageRectangleBackground);

                        setButtonColors(1);
                        currentAudio = new PlayAudio().execute(log.get(listPosition).getUrl());
                    } catch (Exception e) {
                        stopAudio();
                        e.printStackTrace();
                    }
                } else if (position == listPosition){
                    stopAudio();
                } else if (nowPlaying){
                    stopAudio();

                    currentPlaying = position;
                    player = new MediaPlayer();
                    player.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);
                    listPosition = position;
                    currentButton = view;
                    Log.d(LOG_TAG, log.get(position).getUrl());
                    currentMetaTextView = (TextView) view.findViewById(R.id.voiceMessageMetaText);
                    currentPlayPauseImageView = (ImageView) view.findViewById(R.id.voiceMessagePlayPauseImage);
                    currentMessageBackground = (RelativeLayout) view.findViewById(R.id.voiceMessageRectangleBackground);

                    setButtonColors(0, currentPlaying);
                    setButtonColors(1);

                    currentAudio = new PlayAudio().execute(log.get(listPosition).getUrl());
                }
            }
        }
    });

ListAdapter newAdapter=newlistadapter（getActivity（））；
if（this.log==null）{
setAdapter（populateAdapter（newAdapter，newArrayList（））；
}否则{
setAdapter（populateAdapter（newAdapter，log））；
}
list.setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父对象、视图、整型位置、长id）{
Log.d（Log_标记，Integer.toString（位置））；
if（log！=null&&positionmp.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);
                    mp.setDataSource(a.getUrl());
                    mp.prepareAsync();
                    mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                        @Override
                        public void onPrepared(MediaPlayer mp) {
                            activityList.get(position).setDuration(mp.getDuration()/1000);
                            holder.playButton.clearAnimation();
                            mp.start();
                        }
                    });