Develop Reference

How to manage multiple positions in RecyclerView OnClickListener

I want to know how I can get access to other elements of the array in this onclicklistener for a Recycler view. Specifically, I want to be able to change the enabled state of a position other than the current Listener position, but within the click event.
I'm trying to make it such that if three colors are checked (those are check boxes) every box not checked will be disabled until the number of boxes checked is < 3.
The for-loops I have I wrote make sense, but I can't programmatically change the enabled state within the onClickListener for some reason.
private void buildRecyclerView() {
mRecyclerView = findViewById(R.id.recyclerView);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(this);
mAdapter = new ExampleAdapter(mExampleList);
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mAdapter);
mAdapter.setOnItemClickListener(new ExampleAdapter.OnItemClickListener() {
#Override
public void onItemClick(int position) {
boolean checkedState;
if (mExampleList.get(position).getChecked1() == false) {
checkedState = true;
} else {
checkedState = false;
}
changeItem(position, checkedState);
int sum = 0;
for (int i = 0; i < stringArray.length; i++) {
Boolean checked = mExampleList.get(i).getChecked1();
if (checked == true) {
sum = sum + 1;
}
}
for (int i = 0; i < stringArray.length; i++) {
Boolean checked = mExampleList.get(i).getChecked1();
if (!checked && sum == 3) {
mExampleList.get(i).setEnabled1(false);
} else {
mExampleList.get(i).setEnabled1(true);
}
}
}
});
}
adapter
public class ExampleAdapter extends RecyclerView.Adapter<ExampleAdapter.ExampleViewHolder> {
private ArrayList<ExampleItem> mExampleList;
private OnItemClickListener mListener;
public interface OnItemClickListener {
void onItemClick(int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
mListener = listener;
}
public static class ExampleViewHolder extends RecyclerView.ViewHolder {
public CheckBox mCheckBox;
public ExampleViewHolder(#NonNull View itemView, final OnItemClickListener listener) {
super(itemView);
mCheckBox = itemView.findViewById(R.id.checkBox);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (listener != null){
int position = getAdapterPosition();
if (position != RecyclerView.NO_POSITION);
listener.onItemClick(position);
}
}
});
}
}
public ExampleAdapter(ArrayList<ExampleItem> exampleList) {
mExampleList = exampleList;
}
#NonNull
#Override
public ExampleViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.example_item, parent, false);
ExampleViewHolder evh = new ExampleViewHolder(v, mListener);
return evh;
}
#Override
public void onBindViewHolder(#NonNull ExampleViewHolder holder, int position) {
ExampleItem currentItem = mExampleList.get(position);
holder.mCheckBox.setText(currentItem.getCheckText());
holder.mCheckBox.setEnabled(currentItem.getEnabled1());
holder.mCheckBox.setChecked(currentItem.getChecked1());
}
#Override
public int getItemCount() {
return mExampleList.size();
}
}
Item Class
public class ExampleItem {
public String mCheckText;
public Boolean mEnabled;
public Boolean mChecked;
public ExampleItem(String mCheckText, Boolean mEnabled, Boolean mChecked) {
this.mCheckText = mCheckText;
this.mEnabled = mEnabled;
this.mChecked = mChecked;
}
public ExampleItem(String mCheckText) {
this.mCheckText = mCheckText;
}
public String getCheckText() {
return mCheckText;
}
public void setCheckText(String mCheckText) {
this.mCheckText = mCheckText;
}
public Boolean getEnabled1() {
return mEnabled;
}
public void setEnabled1(Boolean mEnabled) {
this.mEnabled = mEnabled;
}
public Boolean getChecked1() {
return mChecked;
}
public void setChecked1(Boolean mChecked) {
this.mChecked = mChecked;
}
}
In other words, I am trying to make everything below blue disabled until I uncheck Red, Green, or Blue!

Try the following:
In adapter, add below codes:
private int selectedCount = 0;
public int getSelectedCount() {
return selectedCount;
}
public void setSelectedCount(int selectedCount) {
this.selectedCount = selectedCount;
notifyDataSetChanged();
}
and change onBindViewHolder() to:
#Override
public void onBindViewHolder(#NonNull ExampleViewHolder holder, int position) {
ExampleItem currentItem = mExampleList.get(position);
holder.mCheckBox.setText(currentItem.getCheckText());
holder.mCheckBox.setChecked(currentItem.getChecked1());
if ((selectedCount == 3)) holder.mCheckBox.setEnabled(currentItem.getChecked1());
else holder.mCheckBox.setEnabled(true);
}
Then in Activity/Fragment, change mAdapter.setOnItemClickListener(new ExampleAdapter.OnItemClickListener()... to:
mAdapter.setOnItemClickListener(new ExampleAdapter.OnItemClickListener() {
#Override
public void onItemClick(int position) {
boolean checkedState;
int selectedCount = mAdapter.getSelectedCount();
if ((selectedCount != 3) || (mExampleList.get(position).getChecked1())) {
if (mExampleList.get(position).getChecked1() == false) {
checkedState = true;
selectedCount++;
} else {
checkedState = false;
selectedCount--;
}
changeItem(position, checkedState);
mAdapter.setSelectedCount(selectedCount);
}
}
});
Pls note that no need to have mEnabled field in the ExampleItem class. Hope that helps!
Explanantion:
About the onClick:- This is because CheckBox totally covered the layout, so itemView cannot recieve the click event. About RecyclerView:- The idea is simple, after modified the data set [not list, here I refer to the mExampleList and also the selectedCount], then call notifyDataSetChanged() which will redraw all recycler item views.

You would need to create a setter function for your 'mExampleList' in your Adpater class, to update the dataset that the adapter is using. It obviously does not change anything, if you make changes to 'mExampleList' in your activity, without updating the list used by the Adapter.
So at the end of your click listener you would have something like that:
mAdapter.setExampleList(mExampleList)
mAdapter.notifyDataSetChanged()

Getting id of a selected recyclerView item android

I have made a note app and everything works fine. Just in RecyclerView List when I choose an item or items and in menu I click delete button I the note is not deleted. Although delete method works in another place.
Here's the method of delete button in menu :
#Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
if (item.getItemId() == R.id.delete_selected) {
for (NotePad notePad : notes) {
if (selectedIds.contains(notePad.getId())) {
database = new Database(this);
database.deleteNote(notePad.getId());
}
}
adapter.notifyDataSetChanged();
return true;
}
return false;
}
And method of delete note in my database class:
void deleteNote(long id) {
SQLiteDatabase database = this.getWritableDatabase();
database.delete(DATABASE_TABLE, ID + "=?", new String[] {String.valueOf(id)});
database.close();
}
I don't know how to relate id of selected note to my method cause deletNote method receives long value but my selectedId is List.
Thanks in advance.
UPDATED
I realized my code works find but it doesn't refresh the list and also goes back from ActionMode to Toolbar. I tried adapter.notifyDataSetChanged();

Use this adapter. I have used interface.
public class NotePadAdapter extends RecyclerView.Adapter < NotePadAdapter.ViewHolder > {
private Context context;
private LayoutInflater inflater;
private List < NotePad > notes;
private List < Long > selectedIds = new ArrayList < > ();
private NoteClickListener listener;
NotePadAdapter(Context context, NoteClickListener listener, List < NotePad > notes) {
this.context = context;
this.inflater = LayoutInflater.from(context);
this.notes = notes;
this.listener = listener;
}
public interface NoteClickListener {
public void onNoteClick(NotePad notePad);
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.notes_list, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
String title = notes.get(position).getTitle();
String date = notes.get(position).getDate();
String time = notes.get(position).getTime();
holder.setOnClickListener() {
listener.onNoteClick(notes.get(position))
}
holder.noteTitle.setText(title);
holder.noteTitle.setText(title);
holder.noteDate.setText(date);
holder.noteTime.setText(time);
long id = notes.get(position).getId();
if (selectedIds.contains(id)) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
holder.rooView.setForeground(new ColorDrawable(ContextCompat.getColor(context, R.color.colorControlActivated)));
}
} else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
holder.rooView.setForeground(new ColorDrawable(ContextCompat.getColor(context, android.R.color.transparent)));
}
}
}
#Override
public int getItemCount() {
return notes.size();
}
public NotePad getItem(int position) {
return notes.get(position);
}
public void setSelectedIds(List < Long > selectedIds) {
this.selectedIds = selectedIds;
notifyDataSetChanged();
}
class ViewHolder extends RecyclerView.ViewHolder {
TextView noteTitle, noteDate, noteTime;
ConstraintLayout rooView;
ViewHolder(#NonNull View itemView) {
super(itemView);
noteTitle = itemView.findViewById(R.id.note_title);
noteDate = itemView.findViewById(R.id.note_date);
noteTime = itemView.findViewById(R.id.note_time);
rooView = itemView.findViewById(R.id.root_view);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(v.getContext(), ContentActivity.class);
i.putExtra("ID", notes.get(getAdapterPosition()).getId());
v.getContext().startActivity(i);
}
});
}
}
}
In your activity/fragment where you are initiating this adapter pass this for the listener and implement the interface and whenever you click any item on the recyclerview then you will your whole NotePad object inside this function.

How to display the Auto Scrolling RecyclerView position on TextView?

I am doing an app which auto-scrolls images, at the bottom of the screen there is a static layout, which I need to display the value of images that have already passed (i.e. position).
I get the correct value of images passed by implementing :
int position = holder.getAdapterPosition();
in the RecyclerViewListAdapter.java
now I need to display this value in the RecyclerViewListActivity.java
on a text view at the static layout beneath the Recycler view?
public class RecyclerViewListAdapter extends RecyclerView.Adapter {
Context context;
List<Data> dataList;
private SharedPreferences preferences;
public RecyclerViewListAdapter(Context context, List<Data> dataList) {
this.context = context;
this.dataList = dataList;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_recycler_list, parent, false);
return new MyViewHolder(itemView);
}
#Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
holder.mImage.setImageResource(dataList.get(position).getImage());
holder.mImage.setImageResource(dataList.get(position).getImage());
**int position = holder.getAdapterPosition();**
}
#Override
public int getItemCount() {
if (dataList == null || dataList.size() == 0)
return 0;
return dataList.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
TextView mNumberText,mText;
ImageView mImage;
LinearLayout mLinearLayout;
public MyViewHolder(View itemView) {
super(itemView);
mImage = (ImageView) itemView.findViewById(R.id.quran_page);
mLinearLayout = (LinearLayout) itemView.findViewById(R.id.linearLayout);
}
}
}
public class RecyclerViewListActivity extends AppCompatActivity {
RecyclerView mListRecyclerView;
ArrayList<Data> dataArrayList;
RecyclerViewListAdapter recyclerViewListAdapter ;
Runnable updater;
private boolean isTouch = false;
TextViewRemaining;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recycler_view_list);
final TextView TextViewRemaining = (TextView) findViewById(R.id.TextViewRemaining);
**TextViewRemaining.setText("Position: "+position);**
initializeView();
mListRecyclerView.addOnItemTouchListener(new RecyclerTouchListener(this,
mListRecyclerView, new ClickListener() {
#Override
public void onClick(View view, int position) {
}
#Override
public void onLongClick(View view, int position) {
Toast.makeText(RecyclerViewListActivity.this, "Long press on position :" + position,
Toast.LENGTH_LONG).show();
}
}));
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
return super.onOptionsItemSelected(item);
}
public static interface ClickListener{
public void onClick(View view,int position);
public void onLongClick(View view,int position);
}
class RecyclerTouchListener implements RecyclerView.OnItemTouchListener{
private ClickListener clicklistener;
private GestureDetector gestureDetector;
//#RequiresApi(api = Build.VERSION_CODES.CUPCAKE)
public RecyclerTouchListener(Context context, final RecyclerView recycleView, 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=recycleView.findChildViewUnder(e.getX(),e.getY());
if(child!=null && clicklistener!=null){
clicklistener.onLongClick(child,recycleView.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) {
}
}
private void initializeView()
{
mListRecyclerView = (RecyclerView) findViewById(R.id.vR_recyclerViewList);
setValues();
}
private void setValues(){
prepareData();
recyclerViewListAdapter = new RecyclerViewListAdapter(RecyclerViewListActivity.this,dataArrayList);
mListRecyclerView.setLayoutManager(new LinearLayoutManager(RecyclerViewListActivity.this)); // original
mListRecyclerView.setItemAnimator(new DefaultItemAnimator());
mListRecyclerView.setHasFixedSize(false);
mListRecyclerView.setAdapter(recyclerViewListAdapter);
recyclerViewListAdapter.notifyDataSetChanged();
final int speedScroll = 2000; //default is 2000 it need to be 30000
final Handler handler = new Handler();
final Runnable runnable = new Runnable() {
int count = 0;
// boolean flag = true;
#Override
public void run() {
boolean x=true;
// while(x) {
if (count < recyclerViewListAdapter.getItemCount()) {
if (count == recyclerViewListAdapter.getItemCount() - 1) {
flag = false;
} else if (count == 0) {
flag = true;
}
}
if (flag) count++;
// else count--;
mListRecyclerView.smoothScrollToPosition(count);
handler.postDelayed(this, speedScroll);
}
};
handler.postDelayed(runnable,speedScroll);
}
private void prepareData(){
dataArrayList = new ArrayList<>();
Data data1 = new Data();
data1.setImage(R.drawable.p1);
dataArrayList.add(data1);
Data data2 = new Data();
data2.setImage(R.drawable.p2);
dataArrayList.add(data2);
Data data3 = new Data();
data3.setImage(R.drawable.p3);
dataArrayList.add(data3);
Data data4 = new Data();
data4.setImage(R.drawable.p4);
dataArrayList.add(data4);
Data data5 = new Data();
data5.setImage(R.drawable.p5);
dataArrayList.add(data5);
}
}
So, How can I show the position value on textView in a real-time, as position is a dynamic value, I expect the output on the textView to change as the images passed to the top.
Many Thanks in advance.

This how I solve my problem:
I save the position value in a power Preference(an easier version of shared Preferences)-many thanks to:
Ali Asadi(https://android.jlelse.eu/powerpreference-a-simple-approach-to-store-data-in-android-a2dad4ddc4ac)
I use a Thread that updates the textview every second-many thanks to:
https://www.youtube.com/watch?v=6sBqeoioCHE&t=149s
Thanks for all.

Hide or Show checkboxes inside Custom grid adapter for all Positions

I have to hide all the checkboxes for every [Position] product until User click button. When ever user clicks button check boxes will be show to select items for delete. Only check box will appear to change not whole grid view.
public class CartAdapter extends BaseAdapter {
Context context;
ArrayList<ProductCount> productCounts;
private LayoutInflater inflater;
private ImageButton plusButton;
private ImageButton minusButton;
private CheckBox selectToDelete;
private onDeleteCartItem onDeleteCartItem = null;
public CartAdapter(Context context, ArrayList<ProductCount> productCounts, onDeleteCartItem selectChangeListener) {
this.context = context;
this.productCounts = productCounts;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.onDeleteCartItem = selectChangeListener;
}
#Override
public int getCount() {
if(productCounts!=null)
return productCounts.size();
return 0;
}
#Override
public Object getItem(int position) {
if(productCounts!=null && position >=0 && position<getCount())
return productCounts.get(position);
return null;
}
#Override
public long getItemId(int position) {
if(productCounts!=null && position >=0 && position<getCount()){
ProductCount temp = productCounts.get(position);
return productCounts.indexOf(temp);
}
return 0;
}
public class ProductsListHolder{
public ImageView cart_item_img;
public TextView cart_item_desc;
public TextView cart_item_count;
public TextView cart_item_price_tag;
public TextView cart_item_price;
public ImageButton cart_item_minus;
public ImageButton cart_item_plus;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
final ProductsListHolder productsListHolder;
if(view == null){
view = inflater.inflate(R.layout.cart_adapter, parent, false);
productsListHolder = new ProductsListHolder();
productsListHolder.cart_item_img = (ImageView) view.findViewById(R.id.cart_item_img);
productsListHolder.cart_item_desc = (TextView) view.findViewById(R.id.cart_item_desc);
productsListHolder.cart_item_count = (TextView) view.findViewById(R.id.cart_item_count);
productsListHolder.cart_item_price_tag = (TextView) view.findViewById(R.id.cart_item_price_tag);
productsListHolder.cart_item_price = (TextView) view.findViewById(R.id.cart_item_price);
plusButton = (ImageButton) view.findViewById(R.id.cart_item_plus);
minusButton = (ImageButton) view.findViewById(R.id.cart_item_minus);
selectToDelete = (CheckBox) view.findViewById(R.id.select_to_delete);
selectToDelete.setTag(position);
view.setTag(productsListHolder);
}
else{
productsListHolder = (ProductsListHolder) view.getTag();
}
final ProductCount cat = productCounts.get(position);
selectToDelete.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
if(onDeleteCartItem != null){
onDeleteCartItem.onSelectToDelete((Integer)buttonView.getTag(),isChecked);
}
}
}
});
minusButton.setOnClickListener(new View.OnClickListener() {
int itemcount = 0;
#Override
public void onClick(View v) {
itemcount = productCounts.get(position).getCount();
productCounts.get(position).setCount(itemcount-1);
setProduct(position,productsListHolder,cat);
}
});
plusButton.setOnClickListener(new View.OnClickListener() {
int itemcount = 0;
#Override
public void onClick(View v) {
itemcount = productCounts.get(position).getCount();
productCounts.get(position).setCount(itemcount+1);
setProduct(position,productsListHolder,cat);
}
});
setProduct(position,productsListHolder,cat);
return view;
}
private void setProduct(int position, final ProductsListHolder productsListHolder, ProductCount pCount) {
Picasso.with(context).load(pCount.products.getImageResours()).into(new Target(){
#Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
productsListHolder.cart_item_img.setBackground(new BitmapDrawable(context.getResources(), bitmap));
}
#Override
public void onBitmapFailed(final Drawable errorDrawable) {
}
#Override
public void onPrepareLoad(final Drawable placeHolderDrawable) {
}
});
productsListHolder.cart_item_desc.setText(pCount.getProducts().getDescription());
productsListHolder.cart_item_price_tag.setText((String.valueOf(pCount.getCount()).concat(" x Rs. ").concat(String.valueOf((pCount.products.getPrice())))));
productsListHolder.cart_item_price.setText("Rs. ".concat(String.valueOf(pCount.getCount()* pCount.products.getPrice())));
productsListHolder.cart_item_count.setText(String.valueOf(pCount.getCount()));
}
#Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
}

Just handling your checkBox in your adapter because you got the position then can hide/show, OnClickListener, OnCheckedChangeListener however you want.
Reference to my answer here: Is there a simple way to check all CheckBox items in custimize BaseAdapter in android?

Passing RecyclerView CardView Clicked Item Data To Activity

I have a question about passing clicked cardview data to activity, and here the full story :
I have an Activity called "Details", which contains 2 TextViews in it's layout, Title & Description .
I have setup a fragment ( tab_1 ) which contain the recyclerview codes and the the items data, each item of those contain : title & description .
What i want :
When the user click the item, it will open the Details Activity, and change Details layout title, with clicked item title, and the same for description .
I've manged to create the other activity as an example, and made intent to start it, plus adding "addOnTouchlistener" thanks to Stackoverflow, i've found the way to make it .
So, how to make this alive? I've tried many ways of the available answers on Stackoverflow, but all of them not working, or not related to my request .
Here are my files :
itemsdata.java :
public class itemsdata {
int CatPic;
String title;
String Descr;
int Exapnd;
int expand_no;
tab_1.java ( fragment )
public class tab_1 extends Fragment implements SearchView.OnQueryTextListener {
private RecyclerView mRecyclerView;
public RecyclingViewAdapter adapter;
private Activity context;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View layout = inflater.inflate(R.layout.tab_1, container, false);
mRecyclerView = (RecyclerView)layout.findViewById(R.id.recycler_view);
mRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener
(getContext(), new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
Intent i = new Intent(view.getContext(), DetailsActivity.class);
view.getContext().startActivity(i);
}
}));
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
adapter = new RecyclingViewAdapter(getActivity(),Listed());
mRecyclerView.setAdapter(adapter);
return layout;
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.main, menu);
final MenuItem item = menu.findItem(R.id.action_search);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
}
#Override
public boolean onQueryTextChange(String query) {
final List<itemsdata> filteredModelList = filter(Listed(), query);
adapter.animateTo(filteredModelList);
mRecyclerView.scrollToPosition(0);
return true;
}
#Override
public boolean onQueryTextSubmit(String query) {
return true;
}
private List<itemsdata> filter(List<itemsdata> models, String query) {
query = query.toLowerCase();
final List<itemsdata> filteredModelList = new ArrayList<>();
for (itemsdata model : models) {
final String text = model.title.toLowerCase();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
return filteredModelList;
}
public List<itemsdata> Listed()
{
//Titles Strings
String sys_title1 = getString(R.string.system_item_title_1);
String sys_title2 = getString(R.string.system_item_title_2);
String sys_title3 = getString(R.string.system_item_title_3);
//Description Strings
String sys_descr1 = getString(R.string.system_item_desc_1);
String sys_descr2 = getString(R.string.system_item_desc_2);
String sys_descr3 = getString(R.string.system_item_desc_3);
//Adding New Cards
List<itemsdata> data = new ArrayList<>();
//Categories Icons New Items ** Make It The Same
int[] icons = {
R.drawable.facebook_icon ,
R.drawable.twitter_icon ,
R.drawable.twitter_icon
};
//Expand Button New Items
int[] expandbutton = {
R.drawable.expanded ,
R.drawable.expanded ,
R.drawable.expanded
};
//UnExpand Button New Items
int[] unexpandbutton = {
R.drawable.ca_expand ,
R.drawable.ca_expand ,
R.drawable.ca_expand
};
//Titles New Items
String[] titles = {
sys_title1 ,
sys_title2 ,
sys_title3
};
//Description New Items
String[] Description = {
sys_descr1 ,
sys_descr2 ,
sys_descr3
};
for(int i = 0;i<titles.length && i < icons.length && i < Description.length && i < unexpandbutton.length && i < expandbutton.length ; i++)
{
itemsdata current = new itemsdata();
current.CatPic = icons[i];
current.title = titles[i];
current.Descr = Description[i];
current.expand_no = unexpandbutton[i];
current.Exapnd = expandbutton[i];
data.add(current);
}
return data;
}
}
Details Activity :
public class DetailsActivity extends AppCompatActivity{
TextView title;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.details);
title = (TextView)findViewById(R.id.details_title);
}
EDIT : I've made it, i have added a button which open the fragment, and passed the data, in the Adapter, but i want it via tab_1.java, not the Adapter, i mean i want to click on the item to open the fragment, not on a button, here a snap from my Adapter code ( i've added it in OnBindViewHolder )
I've setup a OnClick and implemented the Vew.setOnClick ..etc, but when i click the item, nothing happen.
#Override
public void onBindViewHolder(final MyRecycleViewHolder holder, int position) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(v.getContext(),DetailsActivity.class);
v.getContext().startActivity(i);
}
});
//Referencing Data
final itemsdata currentobject = mdata.get(position);
//Referencing Items
holder.ProbTitle.setText(currentobject.title);
holder.ProbDescr.setText(currentobject.Descr);
holder.CategoryPic.setImageResource(currentobject.CatPic);
holder.ExpandButton.setImageResource(currentobject.Exapnd);
holder.ExpandNoButton.setImageResource(currentobject.expand_no);
//What Happen When You Click Expand Button .
holder.ExpandButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(v.getContext(), DetailsActivity.class);
i.putExtra("TitleKey",holder.ProbTitle.getText().toString());
v.getContext().startActivity(i);
}
}
);
public static class MyRecycleViewHolder extends RecyclerView.ViewHolder
{
SwipeLayout swipeLayout;
//Defining Items .
TextView ProbTitle;
ImageButton ExpandButton;
TextView ProbDescr;
ImageButton ExpandNoButton;
ImageView CategoryPic;
/*
TextView Card_Star;
TextView Card_UnStar;
*/
TextView Card_Share;
//Referencing Resources
public MyRecycleViewHolder(final View itemView) {
super(itemView);
ProbTitle = (TextView) itemView.findViewById(R.id.prob_title);
CategoryPic = (ImageView) itemView.findViewById(R.id.cat_pic);
ProbDescr = (TextView) itemView.findViewById(R.id.prob_descr);
ExpandButton = (ImageButton) itemView.findViewById(R.id.expand_button);
ExpandNoButton = (ImageButton) itemView.findViewById(R.id.expand_no_button);
/*
Card_Star = (TextView) itemView.findViewById(R.id.card_star);
Card_UnStar = (TextView) itemView.findViewById(R.id.card_unstar);
*/
Card_Share = (TextView) itemView.findViewById(R.id.card_share);
swipeLayout = (SwipeLayout) itemView.findViewById(R.id.swipe);
}

create an Interface inside your adapter containing methods. And while implementing your Adapter, those methods will be implemented in your activity and you can perform whatever action you want.
public class Adapter extends RecyclerView.Adapter<MyRecycleViewHolder> {
public interface Callbacks {
public void onButtonClicked(String titleKey);
}
private Callbacks mCallbacks;
public Adapter() {
}
#Override
public MyRecycleViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.layout_details, null);
return new MyRecycleViewHolder(v);
}
#Override
public void onBindViewHolder(final MyRecycleViewHolder holder, final int i) {
holder.ExpandButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mCallbacks != null) {
mCallbacks.onButtonClicked(holder.ProbTitle.getText().toString());
}
}
});
}
#Override
public int getItemCount() {
return;
}
public void setCallbacks(Callbacks callbacks) {
this.mCallbacks = callbacks;
}
}

you may try do this on your onItemClick()
Intent i = new Intent(view.getContext(), DetailsActivity.class);
i.putExtra("title", yourTitle);
i.putExtra("description", yourDescription);
view.getContext().startActivity(i);
and when oncreate in your DetailActivity,do this
String title = getIntent().getStringExtra("title");
String description = getIntent().getStringExtra("description");
so you can pass title and description to DetailActivity

IMO, you implement setOnClickListener inside Adapter of RecyclerView. You can refer to my following sample code, then apply its logic to your code. Hope it helps!
public class MyRVAdapter extends RecyclerView.Adapter<MyRVAdapter.ViewHolder> {
Context mContext;
List<String> mStringList;
public MyRVAdapter(Context mContext, List<String> mStringList) {
this.mContext = mContext;
this.mStringList = mStringList;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardview, parent, false);
v.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
TextView textView1 = (TextView) v.findViewById(R.id.textView1);
TextView textView2 = (TextView) v.findViewById(R.id.textView2);
Bundle bundle = new Bundle();
bundle.putString("key1", textView1.getText().toString());
bundle.putString("key2", textView2.getText().toString());
passToAnotherActivity(bundle);
}
});
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
// do something...
}
#Override
public int getItemCount() {
if (mStringList != null) {
return mStringList.size();
}
return 0;
}
private void passToAnotherActivity(Bundle bundle) {
if (mContext == null)
return;
if (mContext instanceof MainActivity) {
MainActivity activity = (MainActivity) mContext;
activity.passToAnotherActivity(bundle); // this method must be implemented inside `MainActivity`
}
}
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public ViewHolder(View itemView) {
super(itemView);
// do something...
}
#Override
public void onClick(View v) {
}
}
}

First of all make your "itemsdata" object to implement Parcelable. You can check it here . In your onItemClick method you pass the object to your Details activity using intent.putExtra("key",listOfDataItems.get(position));
In your DetailsActivity you can get your custom object with getParcelable("key")

All above methods worked, but kinda long, so this one worked for me :
Cardview cardview;
cardView = (CardView)itemView.findViewById(R.id.cv);
cardView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i = new Intent (view.getContext(), DetailsActivity.class);
i.putExtra("TitleKey",ProbTitle.getText().toString());
i.putExtra("DescrKey",ProbDescr.getText().toString());
view.getContext().startActivity(i);
}
});
And in Details.java :
TextView title;
TextView Descr;
title = (TextView)findViewById(R.id.details_title);
Descr = (TextView)findViewById(R.id.details_descr);
String titleresult = result.getExtras().getString("TitleKey");
String Descrresult = result.getExtras().getString("DescrKey");
title.setText(titleresult);
Descr.setText(Descrresult);