Recyclerview 스크롤 중 항목 변경

Recyclerview 스크롤 중 항목 변경

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RecyclerView가 있습니다. 각 행에는 재생 버튼, 텍스트보기 및 진행률 표시 줄이 있습니다. 재생 버튼을 클릭하면 내 sdcard에서 오디오를 재생하고 Progressbar를 진행해야합니다. 문제는 recyclerview를 아래로 스크롤하면 다음 행의 Progressbar를 변경하는 것입니다. 즉, 화면에 5 개 항목을 한 번에 맞출 수 있다는 의미입니다. 6 번째 줄로 스크롤하면 6 번째 줄 탐색 막대가 갑자기 변경됩니다.

public class ListAdapter extends RecyclerView.Adapter {

    private List<Historyitem> stethitems;
    public Context mContext;
    public Activity activity;
    public Handler mHandler;

    static MediaPlayer mPlayer;
    static Timer mTimer;

    public ListAdapter(Activity activity,Context mContext,List<Historyitem> stethitems) {
        this.stethitems = stethitems;
        this.mContext = mContext;
        this.activity = activity;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {

        View rootView = LayoutInflater.
                from(mContext).inflate(R.layout.stethoscopeadapteritem, null, false);
        RecyclerView.LayoutParams lp = new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        rootView.setLayoutParams(lp);
        mHandler = new Handler();
        return new MyViewHolder(rootView);
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder viewHolder, int position) {

        final Historyitem dataItem = stethitems.get(position);
        final MyViewHolder myViewHolder = (MyViewHolder) viewHolder;
        myViewHolder.progressplay.setProgress(0);
        myViewHolder.stethdatetime.setText(dataItem.getReported_Time());
        myViewHolder.stethhosname.setText(dataItem.getdiv());

        if(dataItem.getPatient_Attribute().replaceAll(" ","").equals("")){
            myViewHolder.stethdoctorname.setText(dataItem.getunit());
        } else {
            myViewHolder.stethdoctorname.setText(dataItem.getPatient_Attribute());
        }

        myViewHolder.stethstreamplay.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                   FileDownload(dataItem.getmsg(),
                            myViewHolder.progressplay);

            }
        });
    }

    @Override
    public int getItemCount() {

        return stethitems.size();
    }

    public class MyViewHolder extends RecyclerView.ViewHolder {

        final CustomTextRegular stethdatetime;
        final CustomTextView stethhosname;
        final CustomTextBold stethdoctorname;
        final ImageButton stethstreamplay;
        final NumberProgressBar progressplay;

        public MyViewHolder(View itemView) {
            super(itemView);

            stethdatetime = (CustomTextRegular)
                    itemView.findViewById(R.id.stethdatetime);
            stethhosname = (CustomTextView)
                    itemView.findViewById(R.id.stethhosname);
            stethdoctorname = (CustomTextBold)
                    itemView.findViewById(R.id.stethdoctorname);
            stethstreamplay = (ImageButton)
                    itemView.findViewById(R.id.stethstreamplay);
            progressplay= (NumberProgressBar)
                    itemView.findViewById(R.id.progressplay);


        }
    }
    public void  FileDownload(final String downloadpath,

                                     final NumberProgressBar progressplay) {

        new AsyncTask<NumberProgressBar, Integer, NumberProgressBar>() {
            NumberProgressBar progress;
            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                try {
                    if(mPlayer!=null){
                        mPlayer.stop();
                    }
                }catch (Exception e){
                }
                try {
                    if(mTimer != null){
                        mTimer.purge();
                        mTimer.cancel();
                    }
                }catch (Exception e){
                }
            }

            @Override
            protected NumberProgressBar doInBackground(NumberProgressBar... params) {
                int count;
                progress = progressplay;
                try {

                    final List<NameValuePair> list = new ArrayList<NameValuePair>();
                    list.add(new BasicNameValuePair("pid",id));

                    URL url = new URL(Config.requestfiledownload + "?path=" +
                            downloadpath);
                    URLConnection connection = url.openConnection();
                    connection.connect();

                    int lenghtOfFile = connection.getContentLength();
                    // download the file
                    InputStream input = new BufferedInputStream(url.openStream());
                    OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory() +
                            "record.wav");
                    byte data[] = new byte[1024];
                    long total = 0;
                    while ((count = input.read(data)) != -1) {
                        total += count;
                        // publishing the progress....
                        publishProgress((int) (total * 100 / lenghtOfFile));
                        output.write(data, 0, count);
                    }
                    output.flush();
                    output.close();
                    input.close();
                } catch (Exception e) {

                }
                return progress;
            }
            @Override
            protected void onPostExecute(final NumberProgressBar numberProgressBar) {
                super.onPostExecute(numberProgressBar);

                        try {
                            StartMediaPlayer(numberProgressBar);
                        } catch (Exception e){
                            e.printStackTrace();
                        }

            }
        }.execute();
    }

    public void StartMediaPlayer(final NumberProgressBar progressbar){
        Uri playuri = Uri.parse("file:///sdcard/record.wav");
        mPlayer = new MediaPlayer();
        mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mPlayer.reset();
        try {
            mPlayer.setDataSource(mContext, playuri);
        } catch (IllegalArgumentException e) {

        } catch (SecurityException e) {

        } catch (IllegalStateException e) {

        } catch (Exception e) {

        }
        try {
            mPlayer.prepare();
        } catch (Exception e) {

        }

        mPlayer.start();
        progressbar.setMax(mPlayer.getDuration());
        mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                if(mPlayer!=null) {
                    mPlayer.release();
                    progressbar.setProgress(0);
                }
                if(mTimer != null){
                    mTimer.purge();
                    mTimer.cancel();
                }
            }
        });
        mTimer = new Timer();
        mTimer.schedule(new TimerTask() {
            @Override
            public void run() {
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        progressbar.setProgress(mPlayer.getCurrentPosition());
                    }
                });
            }
        },0,500);
    }}

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이것을 시도하십시오

1. 사용중인 경우 ListView-다음 방법을 재정의하십시오.

   @Override
   public int getViewTypeCount() {    
       return getCount();
   }
   
   @Override
   public int getItemViewType(int position) {    
       return position;
   }
   

2. 사용하는 경우 RecycyclerView-재정의 전용 getItemViewType()방법.

   @Override
   public int getItemViewType(int position) {    
       return position;
   }
   

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setHasStableIds(true);어댑터 생성자를 추가 하고 어댑터에서이 두 메서드를 재정의합니다.

@Override
public long getItemId(int position) {
            return position;
}

@Override
public int getItemViewType(int position) {
       return position;
}

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As the name implies, the views in a RecyclerView are recycled as you scroll down. This means that you need to keep the state of each item in your backing model, which in this case would be a Historyitem, and restore it in your onBindViewHolder.

1) Create position, max, and whatever other variables you need to save the state of the ProgressBar in your model.

2) Set the state of your ProgressBar based on the data in your backing model; on click, pass the position of the item to your FileDownload/StartMediaPlayer methods.

public void onBindViewHolder(final RecyclerView.ViewHolder viewHolder, int position) {
    final Historyitem dataItem = stethitems.get(position);
    final MyViewHolder myViewHolder = (MyViewHolder) viewHolder;
    myViewHolder.progressplay.setMax(dataItem.getMax());
    myViewHolder.progressplay.setProgress(dataItem.getPosition());
    ...
    myViewHolder.stethstreamplay.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
               FileDownload(dataItem.getmsg(), position);
        }
    });

3) Update the progress bar by updating the backing model and notifying that it was changed.

stethitems.get(position).setPosition(mPlayer.getCurrentPosition());
notifyItemChanged(position);

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I have faced the same problem while I was trying to implement a recyclerview that contains a edittex and a checkbox as a row elements. I solved the scrolling value changing problem just by adding the following two lines in the adapter class.

@Override
public long getItemId(int position) {
    return position;
}

@Override
public int getItemViewType(int position) {
    return position;
}

I hope it will be a possible solution. Thanks

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Put recylerView in a NestedScroll View in your XML and add the property nestedScrollingEnabled = false.

And on your adapter onBindViewHolder add this line

final MyViewHolder viewHolder = (MyViewHolder)holder;

Use this viewHolder object with your views to setText or do any kind of click events.

e.g viewHolder.txtSubject.setText("Example");

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I had the same problem while handle a lot of data , it works with 5 because it renders the five elements that are visible on the screen but that gives prob with more elements. The thing is ..

Sometimes RecyclerView and listView just skips Populating Data. In case of RecyclerView binding function is skipped while scrolling but when you try and debug the recyclerView adapter it will work fine as it will call onBind every time , you can also see the official google developer's view The World of listView. Around 20 min -30 min they will explain that you can never assume the getView by position will be called every time.

so, I will suggest to use

RecyclerView DataBinder created by satorufujiwara.

or

RecyclerView MultipleViewTypes Binder created by yqritc.

These are other Binders available if you find those easy to work around .

This is the way to deal with MultipleView Types or if you are using large amount of data . These binders can help you just read the documentation carefully that will fix it, peace!!

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Why don't you try like this,

    HashMap<String, Integer> progressHashMap = new HashMap<>();

    //...
    if(!progressHashMap.containsKey(downloadpath)){
        progressHashMap.put(downloadpath, mPlayer.getCurrentPosition());
    }

    progressbar.setProgress(progressHashMap.get(downloadpath));

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try this

@Override public void smoothScrollToPosition(RecyclerView    recyclerView, RecyclerView.State state,
       int position) {    LinearSmoothScroller linearSmoothScroller =
           new LinearSmoothScroller(recyclerView.getContext()) {
               @Override
               public PointF computeScrollVectorForPosition(int targetPosition) {
                   return LinearLayoutManager.this
                           .computeScrollVectorForPosition(targetPosition);
               }
           };    linearSmoothScroller.setTargetPosition(position);    startSmoothScroll(linearSmoothScroller); }

see this also

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This line changes progress to 0 on each bind

myViewHolder.progressplay.setProgress(0);

Save its state somewhere then load it in this same line.

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This is the expected behaviour of recyclerView. Since the view is recycled your items may get into random views. To overcome this you have to specify which item is put into which kind of view by yourself. This information can be kept in a SparseBooleanArray. what you can do is create a SparseBooleanArray in your adapter like this

SparseBooleanArray selectedItems = new SparseBooleanArray();

whenever your view changes, do:

selectedItems.put(viewItemIndex,true);

Now in your onBindViewHolder do

 if(selectedItems.get(position, false)){
    //set progress bar of related to the view to desired position
    }
    else {
        //do the default
    }

This is the basic to solve your problem. You can adjust this logic to any kind of similar problem in recyclerView.

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I had the similar issue and searched alot for the right answer. Basically it is more of a design of recycler view that it updates the view on the scroll because it refreshes the view.

So all you need to do is at the bind time tell it not to refresh it.

This is how your onBindViewHolder should look like

@Override
@SuppressWarnings("unchecked")
public void onBindViewHolder(final BaseViewHolder holder, final int position) {
    holder.bind(mList.get(position));

    // This is the mighty fix of the issue i was having
    // where recycler view was updating the items on scroll.
    holder.setIsRecyclable(false);
}

ReferenceURL : https://stackoverflow.com/questions/32065267/recyclerview-changing-items-during-scroll