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Can't set RecyclerView inside CardView?

I'm trying to put a RecyclerView inside a CardView and create items dynamically.
Obviously, in XML, RecyclerView is set inside CardView tag, but as you can see picture, RecyclerView item is created outside CardView.
(RecyclerView's items are the parts expressed as kg and set in the photo. And CardView is also an item of another RecyclerView.)
What's the problem?
XML
<androidx.cardview.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="12dp"
android:layout_marginLeft="12dp"
android:layout_marginRight="12dp"
app:cardElevation="10dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/ll1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/workout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="TEST"/>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#color/light_blue_400"/>
</LinearLayout>
<LinearLayout
android:id="#+id/ll2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintTop_toBottomOf="#+id/ll1">
<com.google.android.material.button.MaterialButton
android:id="#+id/delete"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginStart="8dp"
android:layout_marginEnd="4dp"
style="#style/RoutineButtonStyle"
android:text="DELETE"
app:icon="#drawable/ic_delete"/>
<com.google.android.material.button.MaterialButton
android:id="#+id/add"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginStart="4dp"
android:layout_marginEnd="8dp"
style="#style/RoutineButtonStyle"
android:text="ADD"
app:icon="#drawable/ic_add"/>
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="10dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#id/ll2"
android:orientation="vertical"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
Let me know if you need any other code.

Here is the Activity of your add/delete CardView:
//Item List if you want to add one or more Items
private List<MyItem> myItems = new ArrayList<>();
private Adapter smallCardAdapter;
private int size;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerView recyclerView = findViewById(R.id.rv);
//Creates a new Object in the Adapter.class
smallCardAdapter = new Adapter();
recyclerView.setAdapter(smallCardAdapter);
CardView cardView = findViewById(R.id.cardView);
MaterialButton delete = findViewById(R.id.delete);
MaterialButton add = findViewById(R.id.add);
//Add onClickListener
add.setOnClickListener(v -> {
try {
size = myItems.size();
//if the value is 0, a new item is created
//if you want to delete the card after 0 than you have to change the value to 0
if(size == 0){
//Creates a new Object in the MyItem.class
myItems.add(new MyItem("Set","1kg"));
}else{
MyItem myItem = myItems.get(0);
//Replace kg with "" to make a Integer
String secondString = myItem.getSecondString().replace("kg","");
Integer value = Integer.valueOf(secondString);
value++;
myItem.setSecondString(value+"kg");
myItems.set(0,myItem);
}
updateAdapter();
}catch (Exception e){
Log.w("MainActivity","Add Button OnClickListener");
e.printStackTrace();
}
});
//Delete onClickListener
delete.setOnClickListener(v->{
try {
size = myItems.size();
//If the value is 0 then canceled to avoid errors
if(size == 0){
return;
}
MyItem myItem = myItems.get(0);
//Replace kg with "" to make a Integer
String secondString = myItem.getSecondString().replace("kg","");
Integer value = Integer.valueOf(secondString);
//if the value is one or lower
if(value <= 1){
//The card will deleted after updateAdapter();
myItems.clear();
}else{
value--;
myItem.setSecondString(value+"kg");
myItems.set(0,myItem);
}
updateAdapter();
}catch (Exception e){
Log.w("MainActivity","Delete Button OnClickListener");
e.printStackTrace();
}
});
}
private void updateAdapter(){
try {
smallCardAdapter.setItems(myItems);
}catch (Exception e){
Log.w("MainActivity","updateAdapter");
e.printStackTrace();
}
}
The custom Item called MyItem:
public class MyItem {
String firstString;
String secondString;
public MyItem(String firstString,String secondString){
this.firstString = firstString;
this.secondString = secondString;
}
public String getFirstString() {
return firstString;
}
public void setFirstString(String firstString) {
this.firstString = firstString;
}
public String getSecondString() {
return secondString;
}
public void setSecondString(String secondString) {
this.secondString = secondString;
}
}
The Adapter.java creates a smallCard:
public class Adapter extends RecyclerView.Adapter<Adapter.SmallCardHolder> {
private List<MyItem> items = new ArrayList<>();
#NonNull
#Override
public SmallCardHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
// I created a new smallcard for the CardView
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.smallcard, parent, false);
SmallCardHolder smallCardHolder = new SmallCardHolder(itemView);
return smallCardHolder;
}
#Override
public void onBindViewHolder(#NonNull final SmallCardHolder holder, int position) {
//get the current item of the position
MyItem myItem = items.get(position);
String firstString = myItem.getFirstString();
String secondString = myItem.getSecondString();
holder.textViewSet.setText(firstString);
holder.textViewkg.setText(secondString);
}
#Override
public int getItemCount () {
return items.size();
}
public void setItems(List <MyItem> items) {
this.items = items;
notifyDataSetChanged();
}
class SmallCardHolder extends RecyclerView.ViewHolder {
//Here are the TextView's of the smallcard (smallcard.xml)
private TextView textViewSet;
private TextView textViewkg;
public SmallCardHolder(#NonNull View itemView) {
super(itemView);
textViewSet = itemView.findViewById(R.id.set);
textViewkg = itemView.findViewById(R.id.kg);
}
}
}
Create a new layout with name called smallcard.xml for the Adapter.java:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/set"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Set"
android:layout_centerVertical="true"
android:textSize="18sp"
android:layout_marginStart="5dp"
android:textColor="?attr/colorPrimary"
android:textStyle="bold"/>
<TextView
android:id="#+id/kg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="kg"
android:layout_toRightOf="#id/set"
android:layout_marginLeft="55dp"
android:layout_centerVertical="true"
android:textColor="?attr/colorPrimary"
android:textSize="16sp"
android:layout_marginRight="10dp"
android:maxLines="1"/>
</RelativeLayout>
</RelativeLayout>
In your XML you have to give the CardView a name. I called it cardView. Here is the code android:id="#+id/cardView"
Result:
You will find more information as comments in the code.

Child RecyclerView inside Parent RecyclerView is showing at End of Parent RecyclerView?

Child RecyclerView inside Parent RecyclerView is showing at End of Parent RecyclerView ?
I Want To Show Categroy in Parent RecyclerView & show its Sub Category in Child RecyclerView
But When I Click Parent RecyclerView To Show That Sub Category the Child RecyclerView is showing at The Full End Of Parent Category Please Check Where Is I'm Wrong?
Here is My Results:
First Item Clicked
.
Second Item Clicked
My Code:
This Is My Main Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".USER.Category">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/Category"/>
</LinearLayout>
This is my Main java File:
public class Category extends AppCompatActivity {
static Toast Toasts;
RecyclerView Category;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_category);
Category = findViewById(R.id.Category);
Category.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
Category_View_request();
}
public void Category_View_request() {
RequestQueue requestQueue = Volley.newRequestQueue(Category.this);
String url = Constant.Category;
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
GsonBuilder gsonBuilder = new GsonBuilder();
Gson gson = gsonBuilder.create();
GridView_listItems[] Category_View_response = gson.fromJson(response, GridView_listItems[].class);
Category.setAdapter(new CategoryView_Adapter(Category.this, Category_View_response));
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toasts = Toast.makeText(Category.this, "ERROR: Please Check Internet & Try Again", Toast.LENGTH_SHORT);
Toasts.show();
}
});
requestQueue.add(stringRequest);
}
}
this is Parent Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical"
android:padding="5dp"
android:id="#+id/layout">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="120dp"
android:id="#+id/nameLayout">
<ImageView
android:id="#+id/categoryimage"
android:layout_width="120dp"
android:layout_height="120dp"
android:adjustViewBounds="true"
android:background="#fff"
android:contentDescription="#string/todo"
android:padding="8dp"
android:scaleType="fitXY" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="horizontal"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp">
<Space
android:layout_width="112dp"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp">
<TextView
android:id="#+id/categoryname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="1dp"
android:singleLine="true"
android:text="#string/test_product_name"
android:textColor="#color/Black"
android:textSize="13sp"
tools:ignore="RtlSymmetry" />
<TextView
android:id="#+id/categorydec"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="1dp"
android:paddingTop="3dp"
android:singleLine="true"
android:text="#string/test_product_description"
android:textColor="#color/common_google_signin_btn_text_light_default"
android:textSize="12sp"
tools:ignore="RtlSymmetry" />
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/click">
</RelativeLayout>
</RelativeLayout>
<androidx.cardview.widget.CardView
android:id="#+id/subview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="5dp"
android:background="#color/White"
android:elevation="8dp"
android:paddingTop="10dp"
>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/subCatview"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</androidx.cardview.widget.CardView>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
This is Parent Adapter:
public class CategoryView_Adapter extends RecyclerView.Adapter<CategoryView_Adapter.CategoryViewHolder> {
Toast Toasts;
private static Context context;
private static GridView_listItems[] data;
public CategoryView_Adapter(Context context, GridView_listItems[] data) {
this.context = context;
this.data = data;
}
#NonNull
#Override
public CategoryViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View view = inflater.inflate(R.layout.category_view, parent, false);
return new CategoryViewHolder(view);
}
#SuppressLint("SetTextI18n")
#Override
public void onBindViewHolder(#NonNull final CategoryViewHolder holder, int position) {
final GridView_listItems CategoryList = data[position];
holder.categoryname.setText(CategoryList.getName());
holder.categorydec.setText(CategoryList.getId());
Glide.with(holder.categoryimage.getContext())
.applyDefaultRequestOptions(new RequestOptions()
.placeholder(R.drawable.product_loading)
.error(R.drawable.product_loading_failed))
.load(Constant.MAINImagUrl + CategoryList.getCategoryLogo().substring(2))
.into(holder.categoryimage);
holder.categoryname.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
holder.layout.setBackgroundColor(ContextCompat.getColor(context, R.color.common_google_signin_btn_text_light_default));
Grid_View_request(CategoryList.getName());
}
});
}
#Override
public int getItemCount() {
return data.length;
}
public static class CategoryViewHolder extends RecyclerView.ViewHolder {
ImageView categoryimage;
TextView categoryname, categorydec;
CardView subview;
RelativeLayout click;
LinearLayout layout;
public static RecyclerView subCatview;
public CategoryViewHolder(#NonNull View itemView) {
super(itemView);
categoryimage = (ImageView) itemView.findViewById(R.id.categoryimage);
categoryname = (TextView) itemView.findViewById(R.id.categoryname);
categorydec = (TextView) itemView.findViewById(R.id.categorydec);
click = (RelativeLayout) itemView.findViewById(R.id.click);
subview = (CardView) itemView.findViewById(R.id.subview);
layout = (LinearLayout) itemView.findViewById(R.id.layout);
subCatview = (RecyclerView) itemView.findViewById(R.id.subCatview);
GridLayoutManager gridLayoutManager = new GridLayoutManager(MyApplication.getAppContext(), 3, GridLayoutManager.VERTICAL, false);
subCatview.setLayoutManager(gridLayoutManager);
}
}
public static void Grid_View_request(final String category) {
RequestQueue requestQueue = Volley.newRequestQueue(MyApplication.getAppContext());
String url = Constant.Sub_Category;
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
if (response.contains("CityGroceryEmptyResponse")) {
Toast.makeText(MyApplication.getAppContext(), "No Sub Category Found", Toast.LENGTH_SHORT).show();
} else {
GsonBuilder gsonBuilder = new GsonBuilder();
Gson gson = gsonBuilder.create();
Sub_Category_list[] Sub_Category_list = gson.fromJson(response, Sub_Category_list[].class);
subCatview.setAdapter(new Sub_Category_Adapter(MyApplication.getAppContext(), Sub_Category_list));
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MyApplication.getAppContext(), "ERROR: Please Check Internet & Try Again", Toast.LENGTH_SHORT).show();
}
}) {
#Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("category", category);
return params;
}
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("Content-Type", "application/x-www-form-urlencoded");
return params;
}
};
requestQueue.add(stringRequest);
}
}
This is My Child Layout:
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="120dp"
android:layout_gravity="center"
android:layout_margin="2dp"
android:orientation="horizontal"
android:elevation="8dp"
app:cardCornerRadius="1dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp">
<ImageView
android:id="#+id/subCatNameimage"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#mipmap/ic_launcher" />
<TextView
android:id="#+id/subCatName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/subCatNameimage"
android:layout_marginTop="4dp"
android:gravity="center"
android:maxLength="30"
android:text="menu name"
android:textColor="#color/colorPrimary"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/subCatNameimage" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
This is My Child Adapter:
public class Sub_Category_Adapter extends RecyclerView.Adapter<Sub_Category_Adapter.CategoryViewHolder> {
Toast Toasts;
private static Context context;
private static Sub_Category_list[] data;
public Sub_Category_Adapter(Context context, Sub_Category_list[] data) {
this.context = context;
this.data = data;
final Sub_Category_list SubCategoryList = data[0];
}
#NonNull
#Override
public CategoryViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View view = inflater.inflate(R.layout.gridview_items, parent, false);
return new CategoryViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final CategoryViewHolder holder, final int position) {
final Sub_Category_list SubCategoryList = data[position];
holder.subCatName.setText(SubCategoryList.getSubCategoryName());
Glide.with(holder.subCatNameimage.getContext())
.applyDefaultRequestOptions(new RequestOptions()
.placeholder(R.drawable.product_loading)
.error(R.drawable.product_loading_failed))
.load(Constant.MAINImagUrl + SubCategoryList.getSubCategoryLogo().substring(2))
.into(holder.subCatNameimage);
}
#Override
public int getItemCount() {
return data.length;
}
public static class CategoryViewHolder extends RecyclerView.ViewHolder {
ImageView subCatNameimage;
TextView subCatName;
public CategoryViewHolder(#NonNull View itemView) {
super(itemView);
subCatName = (TextView) itemView.findViewById(R.id.subCatName);
subCatNameimage = (ImageView) itemView.findViewById(R.id.subCatNameimage);
}
}
}
Please Correct Me Where is doing Mistake
Thanks In Advance

You can achieve that requirement by using an expandable recycler view.
There are a lot of libraries you can use to achieve this.
You can use this library.
Or follow this post to achieve this on your own, you might need to make some changes to get the output as per your requirement.

I'am achieve My requirement by using an expandable recycler view
HERE

RecyclerView does not show list of objects

I tried the solutions on the other similar posts that I found here but they did not help me. I hope someone can help.
I get data from Unsplash's API and the ArrayList contains 10 items once I get a response, that's why I think It has to be something with the way the view is inflated.
This is code:
public class MainActivity extends AppCompatActivity {
private static final String TAG = "unsplash";
private final String CLIENT_ID = "...myclientID...";
// testing keyword used on the API to search for pictures
private final String KEYWORD = "stackOverflow";
private final String urlBase = "https://api.unsplash.com/";
private Retrofit retrofit;
private RecyclerView recyclerView;
private RecyclerViewAdapter recyclerViewAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
retrofit = new Retrofit.Builder()
.baseUrl(urlBase)
.addConverterFactory(GsonConverterFactory.create())
.build();
recyclerView = findViewById(R.id.recyclerview);
recyclerView.setHasFixedSize(true);
GridLayoutManager layoutManager = new GridLayoutManager(this, 2);
recyclerView.setLayoutManager(layoutManager);
recyclerViewAdapter = new RecyclerViewAdapter();
recyclerView.setAdapter(recyclerViewAdapter);
getData();
}
private void getData() {
PictureService service = retrofit.create(PictureService.class);
Call<PictureResponse> pictureResponseCall = service.getPictureList(KEYWORD, CLIENT_ID);
pictureResponseCall.enqueue(new Callback<PictureResponse>() {
#Override
public void onResponse(Call<PictureResponse> call, Response<PictureResponse> response) {
if (response.isSuccessful()){
PictureResponse pictureResponse = response.body();
ArrayList<UnsplashPic> pictureList = pictureResponse.getResults();
recyclerViewAdapter.addPictures(pictureList);
}else{
Log.e (TAG, " onResponse " + response.errorBody());
}
}
#Override
public void onFailure(Call<PictureResponse> call, Throwable t) {
Log.e (TAG, " onFailure " + t.getMessage());
}
});
}
}
My adapter class:
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
private ArrayList<UnsplashPic> pictureList;
public RecyclerViewAdapter (){
pictureList = new ArrayList<>();
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.item_view_holder, viewGroup, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder viewHolder, int i) {
UnsplashPic pic = pictureList.get(i);
viewHolder.artistName.setText(pic.user.getUsername());
viewHolder.unsplash.setText("Unsplash");
}
#Override
public int getItemCount() {
return pictureList.size();
}
public void addPictures(ArrayList<UnsplashPic> pictureList) {
pictureList.addAll(pictureList);
notifyDataSetChanged();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private ImageView imageView;
private TextView artistName;
private TextView unsplash;
public ViewHolder (View itemView){
super(itemView);
imageView = itemView.findViewById(R.id.imageview);
artistName = itemView.findViewById(R.id.artist_name);
unsplash = itemView.findViewById(R.id.unsplash_name);
}
}
}
item_view_holder.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/imageview"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center"
android:background="#ababab"
android:contentDescription="unsplash picture" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Photo by "/>
<TextView
android:id="#+id/artist_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="on "/>
<TextView
android:id="#+id/unsplash_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true" />
</LinearLayout>
activity_main.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="Search for pictures"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Search"/>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/recyclerview">
</android.support.v7.widget.RecyclerView>
</LinearLayout>

Here:
public void addPictures(ArrayList<UnsplashPic> pictureList) {
pictureList.addAll(pictureList);
notifyDataSetChanged();
}
you are actually adding the content of the pictureList you send as parameter of the function to that same list, your list from adapter is not updated.
You should do like this instead:
public void addPictures(ArrayList<UnsplashPic> pictureList) {
this.pictureList.addAll(pictureList);
notifyDataSetChanged();
}

Expanding Listview using Recyclerview inside Scrollview

I tried below code to implement an expend and collapse content using recyclerview(listview) a link
final boolean isExpanded = position==mExpandedPosition;
holder.details.setVisibility(isExpanded?View.VISIBLE:View.GONE);
holder.itemView.setActivated(isExpanded);
if (isExpanded)
previousExpandedPosition = position;
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mExpandedPosition = isExpanded ? -1:position;
notifyItemChanged(previousExpandedPosition);
notifyItemChanged(position);
}
});
In my case when i click the particular position in recyclerview its expanding but it goes above the recyclerview.I cant see the full expanded content.i can see only partial content.In this case i need to scroll the recyclerview to view the full content.But i am searching for a solution to view the content without scroll the recyclerview. If i click another position in recyclerview that should be placed over an recyclerview.
Hear is My Code
public class CommonFragment extends Fragment {
#BindView(R.id.news_lists)
RecyclerView news_lists;
#BindView(R.id.nested_scroll)
NestedScrollView nested_scroll;
ArrayList<String> Names;
ArrayList<String> responseProducts = null;
NewsListAdaspters mAdapter;
Context mContext;
String position_name;
public CommonFragment() {
}
public static CommonFragment getInstance(String position, ArrayList<String> response) {
CommonFragment fragmentDummy = new CommonFragment();
Bundle args = new Bundle();
args.putStringArrayList("Types", response);
args.putString("position", position);
fragmentDummy.setArguments(args);
return fragmentDummy;
}
#Override
public void setArguments(Bundle args) {
super.setArguments(args);
this.responseProducts = args.getStringArrayList("Types");
this.position_name = args.getString("position");
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
View view;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (view != null) {
ViewGroup parent = (ViewGroup) view.getParent();
if (parent != null)
parent.removeView(view);
}
try {
view = inflater.inflate(R.layout.fragment_common, container, false);
ButterKnife.bind(this, view);
} catch (InflateException ignored) {
}
mContext = getActivity();
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
news_lists.setLayoutManager(mLayoutManager);
news_lists.setNestedScrollingEnabled(false);
Names = new ArrayList<>();
Names.clear();
for (int i = 0; i < 15; i++) {
Names.add("News Details " + i);
}
Log.e("position_name==>", "" + position_name);
getList();
return view;
}
private void getList() {
if (responseProducts.size() > 0) {
mAdapter = new NewsListAdaspters(mContext, responseProducts, position_name);
news_lists.setAdapter(mAdapter);
}
}
public class NewsListAdaspters extends RecyclerView.Adapter<NewsListAdaspters.MyViewHolder> {
private ArrayList<String> data;
private Context context;
private String name;
int mExpandedPosition = -1;
int previousExpandedPosition = -1;
NewsListAdaspters(Context context, ArrayList<String> maps, String selectedFragmentName) {
this.context = context;
this.data = maps;
this.name = selectedFragmentName;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.common_view, parent, false);
final MyViewHolder holder = new MyViewHolder(itemView);
return holder;
}
#Override
public void onBindViewHolder(#NonNull final MyViewHolder holder, #SuppressLint("RecyclerView") final int position) {
holder.news_description.setText(data.get(position));
holder.news_title.setText(name);
final boolean isExpanded = position == mExpandedPosition;
Log.e("isExpanded=====>", "" + isExpanded);
holder.expend_layout.setVisibility(isExpanded ? View.VISIBLE : View.GONE);
holder.itemView.setActivated(isExpanded);
if (isExpanded)
previousExpandedPosition = position;
holder.news_image.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context, Activity_NewsFullDetails.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
});
holder.expand_click_layout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mExpandedPosition = isExpanded ? -1 : position;
notifyItemChanged(previousExpandedPosition);
notifyItemChanged(position);
}
});
holder.share_fb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(context, "WORKING!!!!", Toast.LENGTH_SHORT).show();
}
});
holder.share_whatsapp.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(context, "WORKING!!!!", Toast.LENGTH_SHORT).show();
}
});
holder.share_twet.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(context, "WORKING!!!!", Toast.LENGTH_SHORT).show();
}
});
}
#Override
public int getItemCount() {
return data.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
#BindView(R.id.news_title)
public TextView news_title;
#BindView(R.id.news_hour)
public TextView news_hour;
#BindView(R.id.news_description)
public TextView news_description;
#BindView(R.id.news_image)
public ImageView news_image;
#BindView(R.id.expand_click_layout)
RelativeLayout expand_click_layout;
#BindView(R.id.expend_layout)
public LinearLayout expend_layout;
#BindView(R.id.full_title)
public TextView full_title;
#BindView(R.id.txt_description)
public TextView txt_description;
#BindView(R.id.share_twet)
public ImageView share_twet;
#BindView(R.id.share_whatsapp)
public ImageView share_whatsapp;
#BindView(R.id.share_fb)
public ImageView share_fb;
MyViewHolder(View view) {
super(view);
ButterKnife.bind(this, view);
}
}
}
}
XML file
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#03000000">
<android.support.v4.widget.NestedScrollView
android:id="#+id/nested_scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:fitsSystemWindows="false"
android:focusable="true"
android:focusableInTouchMode="true"
android:scrollbars="none">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:descendantFocusability="blocksDescendants">
<android.support.v7.widget.RecyclerView
android:id="#+id/news_lists"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:nestedScrollingEnabled="false"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
ITEM XML
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="2dp"
android:animateLayoutChanges="true"
android:background="#drawable/comment_background"
android:stateListAnimator="#animator/comment_selection"
android:elevation="3dp"
card_view:cardCornerRadius="2dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/news_image"
android:layout_width="130dp"
android:layout_height="130dp"
android:layout_margin="2dp"
android:background="#drawable/icon_card"
android:scaleType="fitXY" />
<RelativeLayout
android:id="#+id/expand_click_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/news_image"
android:layout_alignTop="#+id/news_image"
android:layout_toEndOf="#+id/news_image"
android:layout_toRightOf="#+id/news_image">
<TextView
android:id="#+id/news_description"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/bottom_layout"
android:layout_marginEnd="2dp"
android:layout_marginRight="2dp"
android:maxEms="3"
android:maxLines="4"
android:padding="4dp"
android:text=""
android:textColor="#color/black_color"
android:textSize="18sp" />
<RelativeLayout
android:id="#+id/bottom_layout"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_alignParentBottom="true"
android:layout_margin="4dp">
<TextView
android:id="#+id/news_hour"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/center_text"
android:layout_toStartOf="#+id/center_text"
android:maxLines="2"
android:text="Hours"
android:textColor="#color/black_color"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="#+id/center_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true" />
<TextView
android:id="#+id/news_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toEndOf="#+id/center_text"
android:layout_toRightOf="#+id/center_text"
android:gravity="end"
android:text="News Title"
android:textColor="#color/black_color"
android:textSize="16sp" />
</RelativeLayout>
</RelativeLayout>
<LinearLayout
android:id="#+id/expend_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/news_image"
android:orientation="vertical"
android:visibility="gone">
<TextView
android:id="#+id/full_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="Title Text"
android:textColor="#color/black_color"
android:textSize="20sp" />
<TextView
android:id="#+id/txt_description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="#string/large_text1"
android:textColor="#color/black_color"
android:textSize="18sp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:orientation="horizontal">
<ImageView
android:id="#+id/share_fb"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="#drawable/share_facebook" />
<ImageView
android:id="#+id/share_whatsapp"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="#drawable/share_whatsapp" />
<ImageView
android:id="#+id/share_twet"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="#drawable/share_tweet" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>

Try to use NestedScrollView instead of ScrollView and set below to your activity :-
recyclerView.setNestedScrollingEnabled(false);
For more information you can refer below stackoverflow links:-
How to use RecyclerView inside NestedScrollView?
Recyclerview inside ScrollView not scrolling smoothly

Setting margins in recyclerview's adapter

I have an adapter linked to RecyclerView. I'm trying to implement chat screen, I use sockets to fetch messages, and if message came from user's phone chat bubble displays in left part of screen, if message came from interlocutor's phone chat bubble displays in left part of screen. Let's see:
Normal view:
And after when I open keyboard to type something, something goes wrong:
Opened keyboard:
But when I scroll RecyclerView up and down everything becomes ok.
Here is my codes:
Chat screen layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#F3F7FD">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_marginBottom="47dp"
android:paddingTop="6dp"
android:paddingBottom="8dp"
android:clipToPadding="false"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:id="#+id/element1"
android:layout_width="match_parent"
android:layout_height="47dp"
android:background="#FFFFFF"
android:orientation="horizontal"
android:layout_alignParentBottom="true">
<ImageView
android:id="#+id/sAttach"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_weight="0"
android:layout_marginTop="9dp"
android:layout_marginLeft="11dp"
android:layout_marginRight="9dp"
android:src="#drawable/attach"
android:tint="#A7A7A7"
android:background="?selectableItemBackgroundBorderless"
android:clickable="true" />
<ProgressBar
android:id="#+id/updateBar"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_weight="0"
android:layout_marginTop="9dp"
android:layout_marginLeft="11dp"
android:layout_marginRight="9dp"
android:indeterminate="true"
android:indeterminateTintMode="src_atop"
android:visibility="gone" />
<EditText
android:id="#+id/msg"
android:layout_width="match_parent"
android:layout_height="47dp"
android:layout_weight="1"
android:paddingLeft="2dp"
android:textSize="16sp"
android:inputType="textCapSentences"
android:maxLines="1"
android:hint="#string/hint_message"
android:background="#FFFFFF"/>
<ImageView
android:id="#+id/sBt"
android:layout_width="33dp"
android:layout_height="33dp"
android:layout_weight="0"
android:paddingTop="8dp"
android:paddingBottom="8dp"
android:paddingLeft="9dp"
android:paddingRight="7dp"
android:layout_marginTop="7dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="10dp"
android:src="#drawable/send"
android:background="#drawable/circle_send_gray"
android:clickable="true" />
</LinearLayout>
<LinearLayout
android:id="#+id/element2"
android:layout_width="match_parent"
android:layout_height="47dp"
android:background="#FFFFFF"
android:orientation="horizontal"
android:layout_alignParentBottom="true"
android:visibility="gone">
<TextView
android:id="#+id/blockMessage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="1px"
android:layout_marginBottom="47dp"
android:layout_alignParentBottom="true"
android:orientation="vertical"
android:background="#20000000" />
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>
Here is Chat.class:
private JsonArrayRequest getDataFromServer(String user, String room) {
//JsonArrayRequest of volley
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(HERE GOES MY APIS URL,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
//Calling method parseData to parse the json response
parseData(response);
//Hiding the progressbar
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
//If an error occurs that means end of the list has reached
}
});
//Returning the request
return jsonArrayRequest;
}
private void parseData(JSONArray array) {
for (int i = 0; i < array.length(); i++) {
//Creating the superhero object
ChatList superHero = new ChatList();
JSONObject json = null;
try {
//Getting json
json = array.getJSONObject(i);
superHero.setMessage(json.getString("message"));
superHero.setFromtype(json.getString("type"));
superHero.setPhoto(json.getString("photo"));
} catch (JSONException e) {
e.printStackTrace();
}
//Adding the superhero object to the list
listSuperHeroes.add(0, superHero);
}
recyclerView.scrollToPosition(listSuperHeroes.size() -1);
//Notifying the adapter that data has been added or changed
adapter.notifyDataSetChanged();
}
Chat Adapter:
public class ChatAdapter extends RecyclerView.Adapter<ChatAdapter.ViewHolder> {
private Context context;
private float scale;
private int dpAsPixels;
private int dpAsPixels2;
private int dpAsPixels3;
private LinearLayout.LayoutParams params;
private LinearLayout.LayoutParams params2;
//List to store all superheroes
static List<ChatList> superHeroes;
public ChatAdapter(List<ChatList> superHeroes, Context context){
super();
//Getting all superheroes
this.superHeroes = superHeroes;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_list, parent, false);
ChatAdapter.ViewHolder viewHolder = new ViewHolder(v);
scale = context.getResources().getDisplayMetrics().density;
dpAsPixels = (int) (3 * scale + 0.5f);
dpAsPixels2 = (int) (12 * scale + 0.5f);
dpAsPixels3 = (int) (12 * scale + 0.5f)+180;
params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params2 = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
return viewHolder;
}
#Override
public void onBindViewHolder(ChatAdapter.ViewHolder holder, int position) {
//Getting the particular item from the list
final ChatList superHero = superHeroes.get(position);
//Showing data on the views
if(superHero.getMessage().equals("image")) {
Picasso.with(context).load("http://mywebsite.com/uploads/media/"+superHero.getPhoto()).into(holder.photo);
holder.photo.setVisibility(ImageView.VISIBLE);
holder.message.setVisibility(TextView.GONE);
params2.bottomMargin = dpAsPixels+5;
params2.topMargin = dpAsPixels+5;
if(superHero.getFromtype().equals("he")) {
params.setMargins(dpAsPixels2, dpAsPixels, dpAsPixels3, dpAsPixels);
holder.photo.setLayoutParams(params2);
holder.photo.setBackgroundResource(R.drawable.chat_bubble_photo);
holder.textCard.setGravity(Gravity.LEFT);
}else{
params.setMargins(dpAsPixels3, dpAsPixels, dpAsPixels2, dpAsPixels);
holder.photo.setLayoutParams(params2);
holder.photo.setBackgroundResource(R.drawable.chat_bubble_me_photo);
holder.textCard.setGravity(Gravity.RIGHT);
}
holder.textCard.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
((Chat)context).openMedia(superHero.getPhoto());
}
});
}else{
holder.photo.setVisibility(ImageView.GONE);
holder.message.setVisibility(TextView.VISIBLE);
holder.message.setText(decodeMessage(superHero.getMessage()));
}
if(superHero.getFromtype().equals("he")) {
params.setMargins(dpAsPixels2, dpAsPixels, dpAsPixels3, dpAsPixels);
holder.message.setLayoutParams(params);
holder.message.setBackgroundResource(R.drawable.chat_bubble);
holder.message.setTextColor(context.getResources().getColor(R.color.darkgray));
holder.textCard.setGravity(Gravity.LEFT);
}else{
params.setMargins(dpAsPixels3, dpAsPixels, dpAsPixels2, dpAsPixels);
holder.message.setLayoutParams(params);
holder.message.setBackgroundResource(R.drawable.chat_bubble_me);
holder.message.setTextColor(context.getResources().getColor(R.color.colorPrimary));
holder.textCard.setGravity(Gravity.RIGHT);
}
}
public int getItemCount() {
return superHeroes.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
//Views
public TextView message;
public LinearLayout textCard;
public ImageView photo;
//Initializing Views
public ViewHolder(View itemView) {
super(itemView);
message = (TextView) itemView.findViewById(R.id.message);
textCard = (LinearLayout) itemView.findViewById(R.id.textCard);
photo = (ImageView) itemView.findViewById(R.id.photo);
}
}
private String decodeMessage(String message) {
String raz = URLDecoder.decode(message);
return StringEscapeUtils.unescapeJava(raz);
}
}

Sorry I cant able to comment thats why giving answer here
When you open keyboard at that time you have to scroll recyclerview at its last position.
mLinearLayoutManager.scrollToPosition(yourList.size());
Hope it works.

I've solved this problem this way:
I've add 2 different chat bubbles for both incoming and outgoing messages, and in ChatAdapter adjusted them by setVisibility to set which bubble should be shown. Margins are setted right in the layout file, not from ChatAdapter.