Develop Reference

First Item of RecyclerView is Missing

I have an Activity. I am creating a File which has some data when activity is created. All the files are properly created and data is correctly written.
Following is my code
public class MyRecordingsActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private RecordingsAdapter recordingsAdapter;
private ArrayList<Recording> recordingArrayList;
private File userRecordingFile;
private static final String USER_MIX_DIR = "UserMix";
private String lines[]=new String[]{};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_recordings);
for(int i=0;i<5;i++){
try{
userRecordingFile = new File(createRecordingFiles(), "Recording"+i+".txt");
FileWriter writer = new FileWriter(userRecordingFile);
writer.append("DEF"+i+"\nHIJ "+i);
writer.flush();
writer.close();
}
catch (Exception e){
e.printStackTrace();
}
}
getSupportActionBar().hide();
recordingArrayList=new ArrayList<>();
recyclerView=findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
recyclerView.setHasFixedSize(true);
readFiles();
Toast.makeText(getApplicationContext(),lines[0],Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),lines[1],Toast.LENGTH_SHORT).show();
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[0],lines[1]));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[2],lines[3]));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[4],lines[5]));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[6],lines[7]));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[8],lines[9]));
recordingsAdapter=new RecordingsAdapter(recordingArrayList);
recyclerView.setAdapter(recordingsAdapter);
}
public File createRecordingFiles() {
File dirRoot = getExternalCacheDir();
File workDir = new File(dirRoot, USER_MIX_DIR);
//Toast.makeText(getApplicationContext(), "HI", Toast.LENGTH_SHORT).show();
if (!workDir.exists()) {
workDir.mkdirs();
File recordingFile = new File(workDir, "Recording File ");
try {
recordingFile.createNewFile();
} catch (IOException e) {
}
}
return workDir;
}
public void readFiles(){
StringBuilder text = new StringBuilder();
BufferedReader br=null;
try {
File dirRoot = getExternalCacheDir();
File workDir = new File(dirRoot, USER_MIX_DIR);
for(int i=0;i<5;i++){
File file = new File(workDir,"Recording"+i+".txt");
br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
lines=text.toString().split("\n");
}
}
br.close() ;
}catch (IOException e) {
e.printStackTrace();
}
}
}
The Toast which i have written correcly displays DEF0 and HIJ 0, but they are not displayed in the recyclerview. Following is screenshot of the screen
Following is my Adapter Class
public class RecordingsAdapter extends RecyclerView.Adapter<RecordingsAdapter.RecyclerViewHolder> {
public static final int TYPE_HEAD=0;
public static final int TYPE_LIST=1;
private ArrayList<Recording> recordingArrayList;
public RecordingsAdapter(ArrayList<Recording> recordingArrayList) {
this.recordingArrayList = recordingArrayList;
}
#Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view;
RecyclerViewHolder recyclerViewHolder;
if(viewType == TYPE_LIST){
view= LayoutInflater.from(parent.getContext()).inflate(R.layout.cell_my_recordings,parent,
false);
recyclerViewHolder=new RecyclerViewHolder(view,viewType);
return recyclerViewHolder;
}else if(viewType == TYPE_HEAD){
view= LayoutInflater.from(parent.getContext()).inflate(R.layout.head_layout,parent,
false);
recyclerViewHolder=new RecyclerViewHolder(view,viewType);
return recyclerViewHolder;
}
return null;
}
#Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
Recording recording;
if(holder.view_type==TYPE_LIST){
recording=recordingArrayList.get(position);
holder.imageView.setImageResource(recording.getImage_id());
holder.typeTextView.setText(recording.getTitle());
holder.dateTimeTextView.setText(recording.getDatetime());
}else if (holder.view_type == TYPE_HEAD){
holder.typeHeaderTextView.setText("TYPE");
holder.titleHeaderTextView.setText("TITLE");
holder.dateTimeHeaderTextView.setText("DATE/TIME");
}
}
#Override
public int getItemCount() {
return recordingArrayList.size();
}
#Override
public int getItemViewType(int position) {
if(position==0){
return TYPE_HEAD;
}
return TYPE_LIST;
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder{
int view_type;
ImageView imageView;
TextView typeTextView,dateTimeTextView;
TextView typeHeaderTextView,titleHeaderTextView,dateTimeHeaderTextView;
public RecyclerViewHolder(View itemView, int viewType) {
super(itemView);
if(viewType==TYPE_LIST){
typeTextView=itemView.findViewById(R.id.tv_cell_recording_recording_name);
imageView=itemView.findViewById(R.id.iv_cell_recordings);
dateTimeTextView=itemView.findViewById(R.id.tv_cell_recording_date_time);
view_type=1;
}else if(viewType==TYPE_HEAD){
typeHeaderTextView=itemView.findViewById(R.id.tv_type_head_layout);
titleHeaderTextView=itemView.findViewById(R.id.tv_title_head_layout);
dateTimeHeaderTextView=itemView.findViewById(R.id.tv_date_time_head_layout);
view_type=0;
}
}
}
}
DEf0 and HIJ 0 are not displayed in the recyclerview. I am not able to understand why they are not displaying in my recyclerview. I have no errors in my log. Any help would be greatly appreciated

You are doing it in wrong way....
You are adding five items in recyclerview, but consider first is header.
So this takes your first item as header, and you see other four items.
What you need to do is, pass dummy item as first item and then add your 5 items.
this way you can solve your problem.
You can try this way:
recordingArrayList.add(new Recording(R.drawable.ic_launcher,"", ""));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[0],lines[1]));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[2],lines[3]));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[4],lines[5]));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[6],lines[7]));
recordingArrayList.add(new Recording(R.drawable.ic_launcher,lines[8],lines[9]));
or you can also do it as below:
change Adapter code
#Override
public int getItemCount() {
return recordingArrayList.size() + 1;
}
#Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
Recording recording;
if(holder.view_type==TYPE_LIST){
recording=recordingArrayList.get(position - 1);
...
}else if (holder.view_type == TYPE_HEAD){
holder.typeHeaderTextView.setText("TYPE");
holder.titleHeaderTextView.setText("TITLE");
holder.dateTimeHeaderTextView.setText("DATE/TIME");
}
}
but you need to verify for empty list in this way

Your recycler view might be hidden under the toolbar. Give a top margin of 56dp.
android:layout_marginTop="56dp"

Try this your first position is set your Title.
Use this
#Override
public int getItemViewType(int position) {
return TYPE_LIST;
}
Instead of this
#Override
public int getItemViewType(int position) {
if(position==0){
return TYPE_HEAD;
}
return TYPE_LIST;
}

What worked for me is that first I remove from the array any null value (since the first element could be null) and then I add null value again. That way I'm avoiding of duplicating null value. I don't use "if" or any adapter implemented methods so I made my app more efficient.
My code is as follow:
myArray.remove(null); // here I remove any preview added null value as first (0 position) element
myArray.add(0, null); //now I add null as first element
//this way I am avoiding showing content with a null values
I hope this helps someone

The toast is displayed because your card is there, but it's hidden by the toolbar. You can add some margin to the RecyclerView:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="schemas.android.com/apk/res/android"
xmlns:app="schemas.android.com/apk/res-auto"
xmlns:tools="schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:layout_marginTop:"?android:attr/actionBarSize"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/recyclerView" />
</RelativeLayout>

If you wants to add Header without passing first blank data from activity, than you need to add blank entry at first position inside your Adapter like this.
Replace this code inside your Adapter:
public RecordingsAdapter(ArrayList<Recording> recordingArrayList) {
this.recordingArrayList = recordingArrayList;
this.recordingArrayList.add(0,null);
}

Recycler View: I want my recycler view item(rows) to be highlighted after specific interval of time

I want my recycler view rows to be highlighted after a specific interval of time, say after 2 seconds.
Searched all over the internet but no luck so far.

How about, in the recycler adapter OnBindViewHolder method, put a [Handler.postDelayed](https://developer.android.com/reference/android/os/Handler.html#postDelayed(java.lang.Runnable, long)) in which you set the specific time where you want the item to change.
Inside the runner that you pass in the handler, you put in a boolean flag to check if the row will have a different colour/behaviour + a notifyDataSetChanged() in the adapter. (You will have to change your data object to accomodate this new variable)

The question is not very clear. I had two questions in mind that I mentioned in the comment of the question.
Do you want to highlight some specific rows?
Do you want to toggle the highlight after each two seconds?
So I'm going for a general solution for both.
Let us assume the object you're populating in your each row is like the following.
public class ListItem {
int value;
boolean highlight = false;
}
The list of ListItem object can be inserted in an ArrayList to be populated in the RecyclerView. Here is your adapter which may look like this.
// Declare the yourListItems globally in your Activity
List<ListItem> yourListItems = new ArrayList<ListItem>();
populateYourListItems();
public class YourAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public class YourViewHolder extends RecyclerView.ViewHolder {
private final TextView valueTextView;
private final LinearLayout background;
public YourViewHolder(final View itemView) {
super(itemView);
valueTextView = (TextView) itemView.findViewById(R.id.value_text_view);
background = (LinearLayout) itemView.findViewById(R.id.background);
}
public void bindView(int pos) {
int value = yourListItems.get(pos).value;
boolean isHighlighted = yourListItems.get(pos).hightlight;
valueTextView.setText(value);
// Set the background colour if the highlight value is found true.
if(isHighlighted) background.setBackgroundColor(Color.GREEN);
else background.setBackgroundColor(Color.WHITE);
}
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_activity_log, parent, false);
return new YourViewHolder(v);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
try {
if (holder instanceof YourViewHolder) {
YourViewHolder vh = (YourViewHolder) holder;
vh.bindView(position);
}
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public int getItemCount() {
if (yourListItems == null || yourListItems.isEmpty())
return 0;
else
return yourListItems.size();
}
#Override
public int getItemViewType(int position) {
return 1;
}
}
Now when you want to highlight some specific items of your RecyclerView you need to just set the highlight value to true and then call notifyDataSetChanged() to bring into the change in effect.
So you might need a timer like the following which will highlight your rows as per your demand in every two seconds.
// Declare the timer
private Timer highlightTimer;
private TimerTask highlightTimerTask;
highlightTimer = new Timer();
highlightTimerTask = new TimerTask() {
public void run() {
highLightTheListItems();
}
};
highlightTimer.schedule(highlightTimerTask, 2000);
Now implement your highLightTheListItems function as per your need.
public void highLightTheListItems() {
// Modify your list items.
// Call notifyDataSetChanged in your adapter
yourAdapter.notifyDataSetChanged();
}
Hope that helps. Thanks.

Do you mean highlight as in colour the row's background? If so, you could do this in your listViewAdapter
#Override
public View getView(final int position, View row, ViewGroup parent){
if (row==null){
row = LayoutInflater.from(getContext()).inflate(mResource, parent, false);
}
if(foo){
row.setBackgroundColor(getResources().getColor(R.color.translucent_green));
}
else row.setBackgroundColor(Color.TRANSPARENT);
return row;
}
Then in colours.xml
<color name="translucent_green">#667cfc00</color>
The first 2 numbers(66) is the alpha value, ie opacity. The next 6 are RBG in hexadecimal.

Can an asynchronous call be made before the views are configured?

I'm trying to get JSON data to display in a RecyclerView list, but whenever I try to make the call it seems that the RecyclerView comes up empty. I have it set up so that I get the API service/manager in onCreate prior to the configViews() method which I wrote. Am I making the call too early? I thought the problem would be to create the views/adapter prior to the call, but it doesn't seem to be making a difference.
This is the code for the Retrofit call:
listCall.enqueue(new Callback<List<Character>>() {
#Override
public void onResponse(Call<List<Character>> call, Response<List<Character>> response) {
if(response.isSuccessful()){
List<Character> characterList = response.body();
Log.v(TAG, response.toString());
for (int i = 0; i < characterList.size(); i++){
Character character = characterList.get(i);
character.setName(characterList.get(i).getName());
character.setDescription(characterList.get(i).getDescription());
characterAdapter.addCharacter(character);
}
configViews();
characterAdapter.notifyDataSetChanged();
}
else {
int sc = response.code();
}
}
#Override
public void onFailure(Call<List<Character>> call, Throwable t) {
}
});
And that configViews() method is here, albeit simpler than when I first started (I have been moving bits around to test whether they will affect inflation of the RecyclerView):
private void configViews() {
characterAdapter = new CharacterAdapter(this);
recyclerView.setAdapter(characterAdapter);
}
EDIT: Thank you all for your replies! As requested here is the Adapter class:
public class CharacterAdapter extends
RecyclerView.Adapter<CharacterAdapter.Holder> {
private static final String TAG = CharacterAdapter.class.getSimpleName();
private final CharacterClickListener clickListener;
private List<Character> characters;
//Constructor for CharacterAdapter.
public CharacterAdapter(CharacterClickListener listener){
characters = new ArrayList<>();
clickListener = listener;
}
//Inflates CardView layout
#Override
public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
View row =
LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item, parent,
false);
return new Holder(row);
}
#Override
public void onBindViewHolder(Holder holder, int position) {
Character currentCharacter = characters.get(position);
holder.name.setText(currentCharacter.getName());
holder.description.setText(currentCharacter.getDescription());
//Picasso loads image from URL
Picasso.with(holder.itemView.getContext())
.load("http://gateway.marvel.com/"+
currentCharacter.getThumbnail()).into(holder.thumbnail);
}
#Override
public int getItemCount() {
return characters.size();
}
public void addCharacter(Character character) {
//Log.d(TAG, character.getThumbnail());
characters.add(character);
notifyDataSetChanged();
}
public Character getSelectedCharacter(int position) {
return characters.get(position);
}
public class Holder extends RecyclerView.ViewHolder implements
View.OnClickListener{
//Holder class created to be implemented by adapter.
private ImageView thumbnail;
private TextView name, description;
public Holder(View itemView) {
super(itemView);
thumbnail = (ImageView)
itemView.findViewById(R.id.character_thumbnail);
name = (TextView) itemView.findViewById(R.id.character_name);
description = (TextView)
itemView.findViewById(R.id.character_description);
itemView.setOnClickListener(this);
}
#Override
public void onClick(View view) {
clickListener.onClick(getLayoutPosition());
}
}
public interface CharacterClickListener {
void onClick(int position);
}
}

In principle you have done the right thing. You can instantiate the views before and fire a fetch request. Once you receive the response, you can notify the adapter that the datatset has changed and the adapter will refresh your views.
The only correction here is, you need to call your configViews(); before the for loop. So your code should be like -
configViews();
for (int i = 0; i < characterList.size(); i++){
Character character = characterList.get(i);
character.setName(characterList.get(i).getName());
character.setDescription(characterList.get(i).getDescription());
characterAdapter.addCharacter(character);
}
characterAdapter.notifyDataSetChanged();
Because right now what is happening is you add all your data using add character and then after that you again call config views which reinitialises your adapter at
characterAdapter = new CharacterAdapter(this);
Hence the empty views.
PS: I don't know your adapter's addCharacter method but i am hoping it is doing the right job. If it still doesn't work let me know and then add your addCharacter code as well.

Based on code the snippets, in configViews() method you are creating new instance of CharacterAdapter. The following code snippets will work.
private void configViews() {
//characterAdapter = new CharacterAdapter(this);
recyclerView.setAdapter(characterAdapter);
}

You should leave the call configViews() call in onCreate but move the rest of it into onResume. It'll achieve following:
Ensure views are ready to display data
Refresh data if your app was brought to background and re-opened

Android: How to show progressbar on each imageview in griidview while sending multipal images to server

Hi I got frustrated while searching solution for my problem.My problem is that i have a gridview to show all images which i selected from gallery.I want to display progressbar on each images in gridview.and while uploading images to server using multipart i want too update progressbar..
I displayed progressbar on each imageview but i am unable to show progress on each progressbar.
SO please help me to show how to show progress bar and their respective process on each imageview.
thanks in advance

Create a interface for an observer:
interface ProgressListener {
void onProgressUpdate(String imagePath, int progress);
}
Let the view holder implement that observer and know the image path:
public class ViewHolder implements ProgressListener {
ImageView imgQueue;
ProgressBar pb;
TextView tv;
String imagePath; //set this in getView!
void onProgressUpdate(String imagePath, int progress) {
if (!this.imagePath.equals(imagePath)) {
//was not for this view
return;
}
pb.post(new Runnable() {
pb.setProgress(progress);
});
}
//your other code
}
The adapter shall hold an map of observers for a particular image path/uri whatever and have an method that is called by the upload/download task. Also add methods to add and remove observer:
public class SelectedAdapter_Test extends BaseAdapter {
private Map<String, ProgressListener> mProgressListener = new HashMap<>();
//your other code
synchronized void addProgressObserver(String imagePath, ProgressListener listener) {
this.mListener.put(imagePath, listener);
}
synchronized void removeProgressObserver(String imagePath) {
this.mListener.remove(imagePath);
}
synchronized void updateProgress(String imagePath, int progress) {
ProgressListener l = this.mListener.get(imagePath);
if (l != null) {
l.onProgressUpdate(imagePath, progress);
}
}
//other code
}
In getView of the adapter register the view holder as an observer:
public View getView(final int i, View convertView, ViewGroup viewGroup) {
//other code
holder.imagePath = data.get(i).getSdcardPath();
this.addProgressObserver(holder.imagePath, holder);
return convertView;
}
The problem right now is, that we register the observer but don't unregister. So let the adapter implement the View.addOnAttachStateChangeListener:
public class SelectedAdapter_Test extends BaseAdapter implements View.addOnAttachStateChangeListener {
//other code
void onViewAttachedToWindow(View v) {
//We ignore this
}
void onViewDetachedFromWindow(View v) {
//View is not visible anymore unregister observer
ViewHolder holder = (ViewHolder) v.getTag();
this.removeProgressObserver(holder.imagePath);
}
//other code
}
Register that observer when you return the view.
public View getView(final int i, View convertView, ViewGroup viewGroup) {
//other code
convertView.addOnAttachStateChangeListener(this);
return convertView;
}
Finally you are able to tell the views what the progress is:
#Override
public void transferred(long num) {
int progress = (int) ((num / (float) totalSize) * 100);
selectedAdapter.onProgressUpdate(listOfPhotos.get(i).getSdcardPath(), progress);
}
One final problem remains, what if the activity is gone while the upload is in progress? You need to check if the activity is still alive. Maybe setting a flag in the adapter to true in onCreate and to false in onDestroy would do the trick. Then the last code fragment could check that flag and not notify the adapter on changes anymore.
So thats basically the idea of how to solve this. Does it work? I don't know I wrote it from scratch without any testing. And even if it does, you still have to manage the states when the progress is 0 or 100. But I leave that to you. Also you might want to change the BaseAdapter for an recyclerView so that we can get rid of the View.addOnAttachStateChangeListener.

add boolean in adapter class
public SelectedAdapter_Test(Context c, ArrayList<CustomGallery> data, boolean showProgress) {
mContext = c;
inflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.data = data;
this.showProgress = showProgress;
}
changes in Adapter class getView
holder.pb = (ProgressBar) convertView.findViewById(R.id.progressbar);
if (showProgress)
holder.pb.setVisibility(View.VISIBLE);
else
holder.pb.setVisibility(View.GONE);
make changes in doFileUpload
private void doFileUpload(View v) {
View vi = v;
for (i = 0; i < listOfPhotos.size(); i++) {
<--your task-->
}
//**important**
SelectedAdapter_Test mTest = new SelectedAdapter_Test(context,data,false);
// set above adapter object respectively;
mList.setadapter(mTest);
}
FYI. pass showProgress value as true for the first time when you set adapter.

notifyDataSetChanged doesn't refresh RecyclerView

I have a weird problem. I switched to RecyclerView from ListView and I can't refresh or notify of change in my ListView. I tried calling Item.this.notifyDataSetChanged();
and other methods to refresh View but it doesn't work.
Instead RecyclerView is refreshed when I scroll(regardless of direction). How can I notify my RecyclerView when there is a change?
CODE:
#Override
public void onBindViewHolder(Ids holder, final int position) {
rowItemClass = (ListViewRow) rowItems.get(position);
Log.e("swag", "OYOYOYOYOYO");
if (Globals.isPlaying && Globals.pos == position) {
if (pausedSamePos == true) {
holder.pauseed_play.setVisibility(View.VISIBLE);
holder.playing_pause.setVisibility(View.GONE);
} else {
holder.pauseed_play.setVisibility(View.GONE);
holder.playing_pause.setVisibility(View.VISIBLE);
}
holder.song_currenttime_sb.setActive();
holder.song_duration.setVisibility(View.INVISIBLE);
holder.song_duration_sb.setVisibility(View.VISIBLE);
holder.seekbar.setActive();
} else {
holder.seekbar.setInactive();
holder.song_currenttime_sb.setInactive();
holder.song_icon.setImageResource(rowItemClass.getImageId());
holder.song_duration_sb.setVisibility(View.INVISIBLE);
holder.song_duration.setVisibility(View.VISIBLE);
holder.pauseed_play.setVisibility(View.GONE);
holder.playing_pause.setVisibility(View.GONE);
}
sharedPreference = new SharedPreference();
holder.song_duration.setTypeface(Globals
.getTypefaceSecondary(context));
holder.song_duration_sb.setTypeface(Globals
.getTypefaceSecondary(context));
holder.song_name.setTypeface(Globals.getTypefacePrimary(context));
holder.song_currenttime_sb.setTypeface(Globals
.getTypefaceSecondary(context));
holder.song_name.setText(rowItemClass.getTitle());
holder.song_duration.setText(rowItemClass.getDesc());
holder.song_duration_sb.setText(rowItemClass.getDesc());
holder.favorite.setTag(position);
holder.song_currenttime_sb.setTag(position);
holder.seekbar.setTag(position);
holder.clickRegister.setTag(position);
holder.song_icon.setTag(position);
holder.song_name.setTag(position);
holder.song_duration.setTag(position);
holder.song_duration_sb.setTag(position);
holder.more_options.setTag(position);
// int task_id = (Integer) holder.seekbar.getTag();
final Ids finalHolder = holder;
holder.clickRegister.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
if ((Globals.isPlaying.booleanValue())
&& (Globals.pos == position)) {
pausePlaying();
} else {
Globals.stopPlaying();
pausedSamePos = false;
Globals.pos = position;
Globals.isPlaying = true;
Item.this.notifyDataSetChanged();
Globals.mp = MediaPlayer.create(context, Integer
.valueOf(Item.this.songPos[position])
.intValue());
Globals.mp.start();
Globals.pos = position;
Globals.isPlaying = Boolean.valueOf(true);
Item.this.notifyDataSetChanged();
Globals.mp
.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(
MediaPlayer mpOnComplete) {
mpOnComplete.release();
Globals.isPlaying = false;
pausedSamePos = false;
Globals.isPlaying = Boolean
.valueOf(false);
finalHolder.menu_options
.startAnimation(new ViewExpandAnimation(
finalHolder.menu_options));
Item.this.notifyDataSetChanged();
}
});
}
} catch (Exception localException) {
}
}
});
holder.clickRegister
.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
Globals.stopPlaying();
Item.this.notifyDataSetChanged();
return true;
}
});
}

I've been struggling hard with a similar issue, trying to handle a use-case where all of the adapter's content has to be replaced and the recycler-view should start from scratch: calling notifyDataSetChanged(), swapAdapter() with numerous combinations of subsequent calls to view/layout-manager invalidation requests resulted in nothing but a (seemingly) empty recycler-view. The view didn't even try to rebind the view holders.
What seemed to have worked it out is this hack-ish fix:
view.swapAdapter(sameAdapter, true);
view.scrollBy(0, 0);
As it turns out, scrollBy (even with 0 offsets) drives the recycler-view into laying out its views and executing the pending view-holders rebinding.

if you want notify your recycleListView just simple call notifyDataSetChanged(); in your class adapter. this is my method in my adapter class :
public class ListAdapter extends RecyclerView.Adapter<Listdapter.ViewHolder> {
....
private List<DesaObject> desaObjects= new ArrayList<DesaObject>();
public void setListObjects(List<DesaObject> desaObjects){
if(this.desaObjects.size()>0)
this.desaObjects.clear();
this.desaObjects = desaObjects;
notifyDataSetChanged();
}
....
public static class ViewHolder extends RecyclerView.ViewHolder {
public final View mView;
public final AppCompatTextView desa;
public ViewHolder(View view) {
super(view);
mView = view;
desa = (AppCompatTextView) view.findViewById(R.id.desa);
}
}
}
in your code you dont actually set or change your listObjects in the OnClickListener and please try notifyDataSetChanged(); instead of Item.this.notifyDataSetChanged();

I am not sure why is this, but notifyDataSetChanged(); didn't work. So I tried keeping track of changed items and refreshing them manually with notifyItemChanged(int); and so far it seems to be working. I am still not sure why refreshing whole RecyclerView didn't work.

Initialize your Adapter Again with changed data and use method 'swapadapter'. hope it helps.