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Recycleview updates its layout

My question is asked before in many threads such as
How do I make RecyclerView update its layout?.
But unfortunately none of them fixed my issue.
I am using recycleview in my android project. for each item I have hidden checkbox and I am trying to make it visible for all items when long pressing. I am trying to call: adapter.notifyItemChanged() in such case but for nothing. sometimes It updates and sometimes does not and in case of updating it updadtes some items and left others.
Here is my code:
recyclerView.addOnItemTouchListener(new RecyclerItemClickListener(this, recyclerView, new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemLongClick(View view, int position) {
CheckBox checkBox = findViewById(R.id.checkBox);
checkBox.setVisibility(View.VISIBLE);
adapter.notifyItemChanged(position);
}
}));
and my listener class is:
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
public interface OnItemClickListener {
void onItemClick(View view, int position);
void onItemLongClick(View view, int position);
}
private OnItemClickListener mListener;
private GestureDetector mGestureDetector;
public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null) {
mListener.onItemLongClick(childView, recyclerView.getChildAdapterPosition(childView));
}
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}

I have solved my issue by adding a boolean flag in the adapter. Then, In the method onBindViewHolder I check this flag and depending on it I show or hide Items' checkboxes as following:
if(flag){
holder.itemView.findViewById(R.id.checkBox).setVisibility(View.VISIBLE);
}
Finally in the long click method I set that flag and call notifyDataSetChanged method to update RecycleView's layout as following:
adapter.flag = true;
adapter.notifyDataSetChanged();

addOnItemTouchListener in recyclerview getting queued

i am showing json data in recyclerview. when i click any item of the recyclerview it should showing some new data. its working fine but the problem is, when i click its getting queued, like if i click tow item one after another, recyclerview will show items for twice.how to solve this issue?
i have tried by setting addOnItemTouchListener null after completion the click, but its showing null pointer exception on next click.
my click listener class below:
public class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildPosition(child));
}
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildPosition(child));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
}

You can also use recycle view click listener below is the class and you can esaily use it.
public class RecyclerOnClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
public interface OnItemClickListener {
public void onItemClick(View view, int position);
public void onLongItemClick(View view, int position);
}
GestureDetector mGestureDetector;
public RecyclerOnClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && mListener != null) {
mListener.onLongItemClick(child, recyclerView.getChildAdapterPosition(child));
}
}
});
}
#Override public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
return true;
}
return false;
}
#Override public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }
#Override
public void onRequestDisallowInterceptTouchEvent (boolean disallowIntercept){}
}
In Activity also you can use it like this
recyclerview_productList.addOnItemTouchListener(
new RecyclerOnClickListener(AgentCustomerActivity.this, recyclerview_productList, new RecyclerOnClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
Intent intent = new Intent(AgentCustomerActivity.this, AgentCutomerOrderDetailActivity.class);
intent.putExtra("agent_cutomerId", list.get(position).getCustomerId());
intent.putExtra("agent_cutomerName", list.get(position).getCustomerName());
startActivity(intent);
overridePendingTransition(R.anim.fade_in, R.anim.fade_out);
}
#Override
public void onLongItemClick(View view, int position) {
}
}));

How to set onItemClickListener for RecyclerView? [duplicate]

This question already has answers here:
Why doesn't RecyclerView have onItemClickListener()?
(31 answers)
Closed 6 years ago.
I'm trying to implement a recyclerView but how can I set an onItemClickListener for my recyclerView?
There are already some answers on SO but they are briefer than what I just need to get the onItemClickListener for RecyclerView.
What is the easiest way to get the onItemClickListener for RecyclerView?

In Android, RecyclerView doesn’t have any listeners like in ListView. So you need to create your own class by extending the RecyclerView.OnItemTouchListener.
Create a class RecyclerTouchListener.java
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
public class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildAdapterPosition(child));
}
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildAdapterPosition(child));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
}
Then in activity, Override the onClick method.
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(context, recyclerView, new RecyclerTouchListener.ClickListener() {
#Override
public void onClick(View view, int position) {
// Toast.makeText(getActivity(), position+ " is selected successfully", Toast.LENGTH_SHORT).show();
//handle click event
}
#Override
public void onLongClick(View view, int position) {
}
}));
By this way, you can handle recyclerview item click event.

define a class named RecyclerItemClickListener with this code
class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
interface OnItemClickListener {
void onItemClick(View view, int position);
}
private GestureDetector mGestureDetector;
RecyclerItemClickListener(Context context, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
then in your activity for use this code
recyclerView.addOnItemTouchListener(new RecyclerItemClickListener(MainActivity.this, new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
}
}));

itemclick listener for recyclerview in android

I am using android recyclerview with cardview, which populates with the data from server. I want to set itemclick event for each item and need to display a dialog with a text. this text also getting from server. it will be different for diferent items.
when I am trying like given,
mItem=lists.getRemarks();
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
new SweetAlertDialog(v.getContext())
.setTitleText("Remark")
.setContentText(mItem)
.show();
}
});
it only gives the last details

somehow i solved it by setting setContentText(mItem) to setContentText(lists.getRemarks())

Recyclerview does not have its item click listener so I have one custom class to detect it
RecyclerItemClickListner
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener
{
public static interface OnItemClickListener
{
public void onItemClick(View view, int position);
public void onItemLongClick(View view, int position);
}
private OnItemClickListener mListener;
private GestureDetector mGestureDetector;
public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener)
{
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener()
{
#Override
public boolean onSingleTapUp(MotionEvent e)
{
return true;
}
#Override
public void onLongPress(MotionEvent e)
{
View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());
if(childView != null && mListener != null)
{
mListener.onItemLongClick(childView, recyclerView.getChildPosition(childView));
}
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e)
{
View childView = view.findChildViewUnder(e.getX(), e.getY());
if(childView != null && mListener != null && mGestureDetector.onTouchEvent(e))
{
mListener.onItemClick(childView, view.getChildPosition(childView));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent){}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
Use it
mRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener(getActivity(), mRecyclerView, new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
// do whatever you want on position clicked
}
#Override
public void onItemLongClick(View view, int position) {
// do whatever you want on position long press
}
}));

get the text of an Item recyclerView

I'm working in the application of Android approached to finish it but I found the problem in recyclerView, and i didn't know how to get the text of an Item of the recyclerView ? (when i click in the item)

First you need to create a listener that gives as argument the view and the position. It dosent exist directly like for the listView. For that you can create a class like this :
public class RecyclerClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
GestureDetector mGestureDetector;
public interface OnItemClickListener {
void onItemClick(View view, int position);
}
public RecyclerClickListener(Context context, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildLayoutPosition(childView));
return true;
}
return false;
}
#Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
Then within your activity :
recyclerView.addOnItemTouchListener( // and the click is handled
new RecyclerClickListener(getActivity(), new RecyclerClickListener.OnItemClickListener() {
#Override public void onItemClick(View view, int position) {
Log.d("click item", String.valueOf(position));
TextView textView = (TextView) view.findViewById(R.id.YourTextViewID);
Log.d("test",textView.getText().toString());
}
}
}));