Develop Reference

Recyclerview item doesn't take all width of the screen while giving it match parent

here is my problem while make a new recyclerview of reviews it shows as below not take all width
My activity
public class ReviewsActivity extends AppCompatActivity {
private ArrayList<Review> reviews;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_reviews);
reviews = new Gson().fromJson(getIntent().getStringExtra("reviews"), new
TypeToken<List<Review>>() {
}.getType());
setUpReviewsList();
}
void setUpReviewsList() {
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.rvReviews);
ReviewsRvAdapter mAdapter = new ReviewsRvAdapter(this, reviews, true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(mAdapter);
}
}
My Adapter
public class ReviewsRvAdapter extends RecyclerView.Adapter<ReviewsRvHolder>
{
private ArrayList<Review> reviews;
private Context context;
ReviewsRvHolder holder;
private DatabaseReference mDatabase;
boolean isActivity = false;
// Provide a suitable constructor (depends on the kind of dataset)
public ReviewsRvAdapter(Context context, ArrayList<Review> reviews) {
this.reviews = reviews;
this.context = context;
mDatabase = FirebaseDatabase.getInstance().getReference();
}
public ReviewsRvAdapter(Context context, ArrayList<Review> reviews, boolean isActivity) {
this.reviews = reviews;
this.context = context;
mDatabase = FirebaseDatabase.getInstance().getReference();
this.isActivity = isActivity;
}
/**
* Create new views (invoked by the layout manager)
*
* #param parent
* #param viewType
* #return
*/
#Override
public ReviewsRvHolder onCreateViewHolder(ViewGroup parent, int viewType)
{
View layoutView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item_user_review, null);
// View layoutView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.layout_review_summary, null);
return new ReviewsRvHolder(layoutView);
}
/**
* Replace the contents of a view (invoked by the layout manager)
*
* #param holder
* #param position
*/
#Override
public void onBindViewHolder(ReviewsRvHolder holder, int position) {
final int tempPos = position;
this.holder = holder;
Review review = reviews.get(position);
try {
holder.txtReviewDate.setReferenceTime(Long.parseLong(review.getDate()));
} catch (Exception e) {
e.printStackTrace();
}
if (review.getUser() != null) {
holder.txtUserReviewNum.setText(String.format("%s%s",
String.valueOf(review.getUser().getNumOfReviews()),
context.getString(R.string.txt_reviews)));
if (review.getUser().getUserName() != null)
holder.txtReviewerName.setText(review.getUser().getUserName());
}
holder.txtLikesNum.setText(String.valueOf(review.getLikesNum()));
holder.rbReviewerRate.setRating((float) review.getRating());
holder.exTxtUserReview.setText(review.getReview());
holder.imgBtnMenu.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//ReviewOtherPopUp(tempPos);
}
});
}
// Return the size of your dataset (invoked by the layout manager)
#Override
public int getItemCount() {
if (isActivity) {
return reviews.size();
}
//return the smallest number between 3 and list size
return (3 > reviews.size() ? reviews.size() : 3);
}
}
here is activity_reviews.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.better.sftani.ReviewsActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/rvReviews"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
and the list_item_user_review.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.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"
android:layout_margin="4dp"
android:elevation="2dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="4dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp">
<ImageView
android:id="#+id/imgProfile"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_gravity="center_vertical"
android:background="#color/black"
android:padding="8dp"/>
<LinearLayout
android:id="#+id/reviewer_linearlayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/imgProfile"
android:gravity="center_vertical"
android:orientation="vertical"
android:paddingLeft="16dp">
<TextView
android:id="#+id/txtReviewerName"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="Mohamed Abd El-Sattar"
android:textColor="#color/black"/>
<TextView
android:id="#+id/txtUserReviewNum"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="#string/txt_reviews"/>
</LinearLayout>
<ImageButton
android:id="#+id/imgBtnMenu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toEndOf="#id/reviewer_linearlayout"
android:layout_toRightOf="#id/reviewer_linearlayout"
android:background="#null"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:src="#drawable/ic_dots"/>
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingLeft="55dp"
>
<RatingBar
android:id="#+id/rbReviewerRate"
style="#style/Base.Widget.AppCompat.RatingBar.Small"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:isIndicator="true"
android:stepSize="1"/>
<com.github.curioustechizen.ago.RelativeTimeTextView
android:id="#+id/txtReviewDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:paddingBottom="4dp"
android:paddingTop="4dp"
android:text="-"
app:relative_time_prefix="Completed "/>
</LinearLayout>
<com.better.sftani.Helpers.ExpandableTextView
android:id="#+id/exTxtUserReview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="16dp"
android:paddingRight="16dp"
/>
<LinearLayout
android:layout_width="121dp"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingLeft="48dp">
<ImageButton
android:id="#+id/imgBtnLikeReview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="?selectableItemBackground"
android:gravity="center_vertical"
android:src="#drawable/ic_like"
/>
<TextView
android:id="#+id/txtLikesNum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="4dp"
android:text="0"/>
</LinearLayout>
</LinearLayout>
i tried a lot to make all of the layouts match parent and it still as it appears above and i search about the problem i saw this
it gives it specific width

In your ReviewsRvAdapter class, inside the onCreateViewHolder() method, you have this line of code:
View layoutView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item_user_review, null);
Right now, you're passing null as the parent when inflating the view. This makes it impossible for the created view to "match parent" for the width.
Change that to this instead:
View layoutView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item_user_review, parent, false);
Now you will have a non-null parent when you inflate the view, and so the width will be set correctly.

Using NumberPicker in android but with strings from SQlite

Is it possible to create something like a NumberPicker Widget in android but populate it with a series of strings pulled from an SQLite database?
If there's only one entry, then the spinner would have one string, if there is a hundred, then there would be a hundred entries. There cannot be less than one entry by design, as in, the activity can't be entered without at least one entry. There is no hardset upper limit, but the data will be populated by date and it is VERY unlikely that this data set would ever exceed a thousand entries due to the nature of how the data is created.
What I'm trying to do is show data saved in an SQLite database, the name of each dataset would be displayed in the NumberPicker, then the user could quickly scroll through the data. The data is then going to be be displayed in a Bar Chart (MPandroidcharts library), as they scroll past the dataset in the NumberPicker. At least, that's the goal.
I've managed the SQLite database, and I've got the charts working for single datasets, I just can't figure out how to get the data selection side working.

Try this code this is just a List Activity that is backed by a Recycler Adapter the XML for the List Activity is included and the Card Layout XML file
public class ListActivity extends AppCompatActivity {
DBHelper helper;
static List<DBModel>dbList;
RecyclerView mRecyclerView;
private static RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
addListenerOnButtonAdd();
TextView tvNoData = (TextView)findViewById(R.id.tvNoData);
setTitle("");// This sets the title of the toolbar
Toolbar topToolBar = (Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(topToolBar);
//topToolBar.setLogo(R.drawable.keyss);// See Notes in MainActivity
setRequestedOrientation( ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
helper = new DBHelper(this);
dbList = new ArrayList<>();
dbList = helper.getDataFromDB();
mRecyclerView = (RecyclerView)findViewById(R.id.recycleview);
mRecyclerView.setHasFixedSize(true);
// use a linear layout manager
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);
// Code below defines the adapter
mAdapter = new RecyclerAdapter(this,dbList);
mRecyclerView.setAdapter(mAdapter);
int sz = dbList.size();
if(sz == 0){
tvNoData.setVisibility(View.VISIBLE);
tvNoData.setText("No Data");
}
}
// This method is called from DetailsActivity and notifies Recycler View
that the DB was changed
of DB and Recycler View
public static void removeListRow(int position) {
dbList.remove(position);
mAdapter.notifyItemRemoved(position);
mAdapter.notifyItemRangeChanged(position, dbList.size());
}
/* this BUTTON is on the ToolBar click to ADD new record */
private void addListenerOnButtonAdd() {
// Navigate to DetailsActivity to ADD new DATA
Toolbar tb = (Toolbar) findViewById( R.id.toolbar );
setSupportActionBar( tb );
tb.findViewById( R.id.btnAdd ).setOnClickListener( new
View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intentSP = new Intent(ListActivity.this,
DetailsActivity.class );
Bundle extras = new Bundle();
extras.putString("FROM_LIST_ACTIVITY","true" );
intentSP.putExtras(extras);
startActivity( intentSP );
}
} );
}
public void onBackPressed(){
Intent intent = new Intent( ListActivity.this, MainActivity.class );
startActivity( intent );
}
}
<?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:id="#+id/activity_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/color_lightGray"
android:orientation="vertical"
tools:context="com.searchdb.ListActivity">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:minHeight="?attr/actionBarSize"
android:background="#color/color_darkGray"
android:layout_width="match_parent"
android:layout_height="64dp">
<ImageView
android:id="#+id/imageTB"
android:layout_width="70dp"
android:layout_height="wrap_content"
android:paddingBottom="2dp"
android:paddingLeft="2dp"
android:paddingRight="2dp"
android:paddingTop="4dp"
android:src="#drawable/keyss" />
<TextView
android:text="#string/list_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/toolbar"
android:layout_alignParentStart="true"
android:layout_marginStart="30dp"
android:layout_marginBottom="20dp"
android:id="#+id/tvLA"
android:textStyle="bold"
android:textColor="#color/color_White"
android:textSize="22sp" />
<Button
android:text="#string/add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btnAdd"
android:layout_marginLeft="100dp"
android:textSize="18sp"
android:textStyle="bold"
android:focusable="false"
android:textColor="#color/color_White"
android:background="#color/color_Transparent"/>
</android.support.v7.widget.Toolbar>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycleview"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:text="TextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/tvNoData"
android:gravity="center"
android:layout_marginTop="240dp"
android:visibility="invisible"
android:textAllCaps="true"
android:textStyle="bold"
android:textSize="30sp"
android:textColor="#color/color_Red" />
</LinearLayout>
</LinearLayout>
public class RecyclerAdapter extends
RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {
static List<DBModel> dbList;
static private Context context;
int sz;
RecyclerAdapter(Context context, List<DBModel> dbList) {
RecyclerAdapter.dbList = new ArrayList<>();
RecyclerAdapter.context = context;
RecyclerAdapter.dbList = dbList;
}
#Override
public RecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int
viewType) {
View itemLayoutView =
LayoutInflater.from(parent.getContext()).inflate(R.layout.item_row, null);
// create ViewHolder
ViewHolder viewHolder = new ViewHolder(itemLayoutView);
return viewHolder;
}
#Override
public void onBindViewHolder(RecyclerAdapter.ViewHolder holder, int
position) {
holder.rowid.setText(String.valueOf(dbList.get(position).getRowid()));
holder.station.setText(dbList.get(position).getStation_Name());
System.out.println("RecyclerAdapter BindViewHolder FIRST position
"+position);
}
#Override
public int getItemCount() {
return dbList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements
View.OnClickListener {
public TextView station, rowid;
public ViewHolder(View itemLayoutView) {
super(itemLayoutView);
rowid = (TextView) itemLayoutView.findViewById(R.id.rvROWID);
station = (TextView) itemLayoutView.findViewById(R.id.rvSTATION);
// Attach a click listener to the entire row view
itemLayoutView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
Intent intentN = new Intent(context, DetailsActivity.class);
Bundle extras = new Bundle();
extras.putInt("POSITION", getAdapterPosition());
extras.putString("FROM_LIST_ACTIVITY", "false");
intentN.putExtras(extras);
context.startActivity(intentN);
}
}
}
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:orientation="horizontal"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/color_White">
<TextView
android:id="#+id/rvROWID"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="left|center_vertical"
android:padding="10dp"
android:textAlignment="center"
android:text="Position ID"
android:textColor="#color/color_Black"
android:layout_marginLeft="10dp"
android:textStyle="bold"
android:textSize="16sp"/>
<TextView
android:id="#+id/rvSTATION"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:padding="10dp"
android:gravity="right|center_vertical"
android:text="Station"
android:layout_marginLeft="10dp"
android:textStyle="bold"
android:textSize="16sp"
android:textColor="#color/color_Black" />
</RelativeLayout>
</android.support.v7.widget.CardView>

Recycler view not rendering view

I am not getting any view from the recycler, I did some debug and the constructor of the adapter is called with items on its list, also the method
getItemCount()
but none of the rest seem to be executed.
I´ve been wandering around stack looking for this problem and i found different approaches to a solution, problem is none worked out for me, maybe I am just missing something i can´t see.
I read somewhere that it could be because the recycler view is inside an scroll view, but the solution given did not worked for me
my custom adapter:
public class CircumstancesAdapter extends RecyclerView.Adapter<CircumstancesAdapter.CircumstancesViewHolder> {
List<CatalogRespModel> circumList;
Context mContext;
public CircumstancesAdapter(List<CatalogRespModel> list, Context context) {
this.circumList = list;
this.mContext = context;
}
#Override
public CircumstancesViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.row_item_circumstances, parent, false);
return new CircumstancesViewHolder(view);
}
#Override
public void onBindViewHolder(CircumstancesViewHolder holder, int position) {
holder.tvCircum.setText(circumList.get(position).get_Descripcion());
}
#Override
public int getItemCount() {
if(circumList != null) return circumList.size();
else return 0;
}
public class CircumstancesViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
RadioButton rbCircum;
TextView tvCircum;
private Context context;
public CircumstancesViewHolder(View itemView) {
super(itemView);
rbCircum = (RadioButton) itemView.findViewById(R.id.rb_circ);
rbCircum.setOnClickListener(this);
tvCircum = (TextView) itemView.findViewById(R.id.tv_circ);
this.context = itemView.getContext();
}
#Override
public void onClick(View v) {
}
}
}
my container layout:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- TODO: Update blank fragment layout -->
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="15dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="20dp"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="8dp"
android:id="#+id/text2"
android:text="#string/text_circ"
android:textSize="20sp"
android:textColor="#color/colorPrimaryshadow"/>
<RelativeLayout
android:id="#+id/placa"
android:layout_width="180dp"
android:layout_height="120dp"
android:layout_gravity="center"
android:background="#drawable/placa">
<TextView
android:id="#+id/tv_plate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical|center_horizontal"
android:layout_centerInParent="true"
android:text="#string/dummy"
android:textSize="40sp"
android:textColor="#android:color/black"/>
</RelativeLayout>
<ImageView
android:id="#+id/iv_indicator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:clickable="true"
android:src="#drawable/conductora" />
<android.support.v7.widget.RecyclerView
android:id="#+id/rview_circumstances"
android:layout_width="match_parent"
android:background="#fff"
android:orientation="vertical"
android:layout_height="wrap_content"/>
<Button
android:id="#+id/boton_continuar_circustanciasa"
android:layout_marginTop="15dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/continuar"
android:layout_marginBottom="10dp"
android:elevation="30dp"
android:layout_gravity="center"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</FrameLayout>
my row layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:background="#fff"
android:paddingTop="2dp"
android:paddingBottom="2dp"
android:layout_height="wrap_content">
<RadioButton
android:id="#+id/rb_circ"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:buttonTint="#color/colorAccentDark"
android:gravity="center_vertical"
android:textSize="14sp" />
<TextView
android:layout_gravity="center_vertical"
android:gravity="center_vertical"
android:id="#+id/tv_circ"
android:textSize="14sp"
android:text="texto de prueba"
android:textColor="#color/colorAccentDark"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
and in my onCreateView inside the fragment:
recyclerView = (RecyclerView) rootView.findViewById(R.id.rview_circumstances);
recyclerView.setNestedScrollingEnabled(false);
recyclerView.setHasFixedSize(true);
if(Catalogs.circumstancesArray.size() > 0){
adapter = new CircumstancesAdapter(Catalogs.circumstancesArray, getContext());
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(adapter);
}
Note: I checked the List size and is greater than 0
Fragment code as requested:
public class CircumstancesFragment extends Fragment {
Button btnContinue;
TextView tvPlate;
private ImageView ivIndicator;
private static int iNumDevices;
IFragmentListener iFragmentListener;
private RecyclerView recyclerView;
RecyclerView.Adapter adapter;
private final static String TAGMap = CircumstancesFragment.class.getSimpleName();
public static final String TAG = "CircumstancesFragment.java";
public static CircumstancesFragment getInstance(Bundle bundle){
if(bundle != null){
iNumDevices = bundle.getInt("numDevices");
}
return new CircumstancesFragment();
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if(context != null){
if(context instanceof IFragmentListener){
iFragmentListener = (IFragmentListener) context;
} else
throw new RuntimeException("el contexto no esta implementando la interfaz");
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final View rootView = inflater.inflate(R.layout.fragment_circustancias_, container, false);
btnContinue = (Button) rootView.findViewById(R.id.boton_continuar_circustanciasa);
tvPlate = (TextView) rootView.findViewById(R.id.tv_plate);
recyclerView = (RecyclerView) rootView.findViewById(R.id.rview_circumstances);
ivIndicator = (ImageView) rootView.findViewById(R.id.iv_indicator);
recyclerView.setNestedScrollingEnabled(false);
recyclerView.setHasFixedSize(true);
if(Catalogs.circumstancesArray.size() > 0){
adapter = new CircumstancesAdapter(Catalogs.circumstancesArray, getContext());
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
btnContinue.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view)
{
try
{
iFragmentListener.notify(null, TAG);
} catch (Exception ex)
{
Log.d("error", ex.getMessage());
}
}
});
setLayout(iNumDevices);
return rootView;
}
private void setLayout(int i){
tvPlate.setText(FdccoreConstants.insuredArray.get(0).get_Placa_Vehiculo());
if(i== FdccoreConstants.ONE_DEVICE){
ivIndicator.setImageResource(R.drawable.conductora);
}else if(i== FdccoreConstants.TWO_DEVICE){
ivIndicator.setImageResource(R.drawable.only_conductor);
}
}
private void resetView(){
}
}

Please provide more code because Your layout and adapter is working fine.
I only changed Your model list to String.
Maybe in place when You checked list size and list.size() > 0 add
adapter.notifyDataSetChanged();
=====
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.rview_circumstances);
recyclerView.setNestedScrollingEnabled(false);
recyclerView.setHasFixedSize(true);
list = new ArrayList<>();
list.add("asd");
list.add("sasf");
list.add("asasfasf");
list.add("asgagsad");
list.add("asgas");
list.add("asagasgd");
list.add("asreyeryd");
list.add("asgsheyd");
CircumstancesAdapter adapter = new CircumstancesAdapter(list, this);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(adapter);

solution: somehow in order to work with the scroll view i must add this line
compile 'com.android.support:recyclerview-v7:25.3.1'
compiling only appcompat-v7 wont work

CardView not displaying within RecyclerView

Before you ask, yes I know there are many questions that are very similar to this and I have tried most of them to no avail. My problem is that a CardView is not displaying within a RecyclerView. The items whithin it are displaying but not the card itself.
Without further or do, here's my code:
Adapter:
Integer count = 0;
Boolean isStart = true;
String datag = "";
String typeg = "";
Integer LastItemType=0; //0=None 1=Text 2=Image
ViewHolder a;
#Override
public EntryAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
a= createholder(parent, viewType);
return(a);
}
public ViewHolder createholder(ViewGroup parent, int viewtype) {
if (typeg.equals("image")) {
View root = LayoutInflater.from(parent.getContext())
.inflate(R.layout.listitems, parent, false);
CardView card = (CardView) root.findViewById(R.id.card_view);
ImageView image = (ImageView) root.findViewById(R.id.Img);
((ViewGroup)image.getParent()).removeView(root.findViewById(R.id.card_view));
if (LastItemType == 2) {
((ViewGroup)image.getParent()).removeView(root.findViewById(R.id.Img));
}
if (LastItemType == 1) {
((ViewGroup)image.getParent()).removeView(root.findViewById(R.id.Txt));
}
ViewHolder vh = new ViewHolder(image, card);
LastItemType = 2;
return vh;
} else {
if (typeg.equals("text")) {
View root = LayoutInflater.from(parent.getContext())
.inflate(R.layout.listitems, parent, false);
CardView card = (CardView) root.findViewById(R.id.card_view);
TextView image = (TextView) root.findViewById(R.id.Txt);
((ViewGroup)image.getParent()).removeView(root.findViewById(R.id.card_view));
if (LastItemType == 1) {
((ViewGroup)image.getParent()).removeView(root.findViewById(R.id.Txt));
}
if (LastItemType == 2) {
((ViewGroup)image.getParent()).removeView(root.findViewById(R.id.Img));
}
ViewHolder vh = new ViewHolder(image, card);
LastItemType = 1;
return vh;
}
return null; //TODO: REMOVE!
}
}
#Override
public void onBindViewHolder(EntryAdapter.ViewHolder holder, int position) {
// Deal with data
}
public class ViewHolder extends RecyclerView.ViewHolder {
public ImageView imgg;
public TextView txtg;
public CardView cardg;
public ViewHolder(ImageView image, CardView card) {
super(image);
imgg = image;
cardg = card;
}
public ViewHolder(TextView text, CardView card) {
super(text);
txtg = text;
cardg = card;
}
}
#Override
public int getItemCount() {
return count;
}
public void refresh(String data, String type, ViewGroup parent) {
isStart = false;
datag = data;
typeg = type;
count++;
createholder(parent, -100);
}
listitems.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card_view"
android:layout_gravity="center"
android:layout_width="200dp"
android:layout_height="200dp"
card_view:cardCornerRadius="4dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
>
<ImageView
android:layout_height="wrap_content"
android:layout_weight="0.25"
android:layout_width="wrap_content"
android:layout_margin="10dp"
android:id="#+id/Img"
android:scaleType="center"
android:maxHeight="100dp"
android:maxWidth="150dp"/>
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_weight="0.25"
android:id="#+id/Txt"
android:layout_gravity="center_horizontal|center_vertical"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
Thanks in advance!

Check out my code, i use it for each of my app after modifying it slightly. You can also use adapter if you have more than one RecyclerViews by changing it's type field and layout and views accordingly. It contains a CoordinatorLayout that has CollapsingLayout with ImageView in it. It contains many layouts for Material Design, i hope it helps.
Activity contains RecyclerView and CardView, i removed things like database, Floating action buttons that you may not need and may make it more difficult to understand. If you need the whole class contact me.
public class MeasureListActivity extends AppCompatActivity
implements MeasureListAdapter.OnRecyclerViewMeasureClickListener {
// Views
private RecyclerView mRecyclerView;
private MeasureListAdapter mAdapter;
private Toolbar toolbar;
// List that keeps values displayed on the screen
private List<Measure> listMeasure;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_prev_measures);
setViews();
}
private void setViews() {
/*
* Set toolbar and arrow icon to return back
*/
toolbar = (Toolbar) findViewById(R.id.toolbarPrevMeasure);
setSupportActionBar(toolbar);
// Enable home button for API < 14
getSupportActionBar().setHomeButtonEnabled(true);
// Enable home button for API >= 14
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
/*
* RecylerView to display items as a list
*/
mRecyclerView = (RecyclerView) findViewById(R.id.recyclerViewPrevMeasure);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mAdapter = new MeasureListAdapter(this, listMeasure, 0);
// Attach an instance of OnRecyclerViewMeasureClickListener that
// implements itemClicked()
mAdapter.setClickListener(this);
mRecyclerView.setAdapter(mAdapter);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void itemMeasureClicked(View view, int position) {
}
}
public class MeasureListAdapter extends RecyclerView.Adapter<MeasureListAdapter.MyViewHolder> {
private LayoutInflater inflater;
private List<Measure> data = Collections.emptyList();
// This is for delegating event from adapter's onClick() method to
// NavigationDrawerFragment
private OnRecyclerViewMeasureClickListener recyclerClickListener;
private DecimalFormat decimalFormat;
private int type = 0;
private Context mContext;
public MeasureListAdapter(Context context, List<Measure> data, int type) {
mContext = context;
inflater = LayoutInflater.from(context);
this.data = data;
decimalFormat = new DecimalFormat("###.#");
this.type = type;
}
#Override
public int getItemCount() {
return data.size();
}
#Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
Measure measure = data.get(position);
String title = measure.getTitle();
String note = measure.getNote();
String date = measure.getFormattedDate();
double angle = measure.getAnglePhoto();
// Compass
double azimuth = measure.getAngleAzimuth();
double pitch = measure.getAnglePitch();
double roll = measure.getAngleRoll();
String bearing = measure.getBearing();
holder.tvTitle.setText(title);
holder.tvNote.setText(note);
holder.tvAngle.setText(
mContext.getString(R.string.angle) + ": " + decimalFormat.format(angle) + ConstantsApp.DEGREE_ICON);
// Compass
holder.tvAzimuth.setText(
mContext.getString(R.string.azimuth) + ": " + decimalFormat.format(azimuth) + ConstantsApp.DEGREE_ICON);
holder.tvPitch.setText(
mContext.getString(R.string.pitch) + ": " + decimalFormat.format(pitch) + ConstantsApp.DEGREE_ICON);
holder.tvRoll.setText(
mContext.getString(R.string.roll) + ": " + decimalFormat.format(roll) + ConstantsApp.DEGREE_ICON);
holder.tvBearing.setText(mContext.getString(R.string.bearing) + " " + bearing);
holder.tvDate.setText("Date" + ": " + measure.getFormattedDate());
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int arg1) {
View view = null;
view = inflater.inflate(R.layout.custom_row_angle_photo, parent, false);
MyViewHolder viewHolder = new MyViewHolder(view);
return viewHolder;
}
/**
* get an instance of OnRecyclerViewClickListener interface
*
* #param OnRecyclerViewMeasureClickListener
* callback that is used by adapter to invoke the method of the
* class implements the OnRecyclerViewClickListener interface
*/
public void setClickListener(OnRecyclerViewMeasureClickListener recyclerClickListener) {
this.recyclerClickListener = recyclerClickListener;
}
public void delete(int position) {
data.remove(position);
notifyItemRemoved(position);
}
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
// Views
private TextView tvTitle, tvNote, tvAngle, tvAzimuth, tvPitch, tvRoll, tvBearing, tvDate;
public MyViewHolder(View itemView) {
super(itemView);
tvTitle = (TextView) itemView.findViewById(R.id.tvDisplayTitle);
tvAngle = (TextView) itemView.findViewById(R.id.tvDisplayAngle);
// Compass
tvAzimuth = (TextView) itemView.findViewById(R.id.tvDisplayAzimuth);
tvPitch = (TextView) itemView.findViewById(R.id.tvDisplayPitch);
tvRoll = (TextView) itemView.findViewById(R.id.tvDisplayRoll);
tvBearing = (TextView) itemView.findViewById(R.id.tvDisplayBearing);
tvNote = (TextView) itemView.findViewById(R.id.tvDisplayNote);
tvDate = (TextView) itemView.findViewById(R.id.tvDisplayDate);
itemView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if (recyclerClickListener != null) {
recyclerClickListener.itemMeasureClicked(v, getLayoutPosition());
}
}
}
/**
* RecyclerViewClickListener interface helps user to set a clickListener to
* the RecyclerView. By setting this listener, any item of Recycler View can
* respond to any interaction.
*
* #author Fatih
*
*/
public interface OnRecyclerViewMeasureClickListener {
/**
* This is a callback method that be overriden by the class that
* implements this interface
*/
public void itemMeasureClicked(View view, int position);
}
}
Measure class only contains setters and getters for int and String values so i don't put it.
Layout for Activity
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/layoutMainMeasure"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:background="#android:color/background_light"
android:paddingBottom="50dp" >
<android.support.design.widget.AppBarLayout
android:id="#+id/appbarPrevMeasure"
android:layout_width="match_parent"
android:layout_height="200dp"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar" >
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsingToolbarPrevMeasure"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|enterAlwaysCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp" >
<ImageView
android:id="#+id/backgroundPrevMeasure"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_collapseMode="parallax"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/bg_material" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbarPrevMeasure"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerViewPrevMeasure"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:background="#eeeeee"
android:paddingTop="12dp" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fabLog"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="80dp"
app:layout_anchor="#id/appbarPrevMeasure"
app:layout_anchorGravity="bottom|right|end"
android:src="#drawable/ic_save_white_36dp"
android:tint="#android:color/white"
app:backgroundTint="#FFA500" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fabClearDB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/activity_horizontal_margin"
app:layout_anchor="#id/appbarPrevMeasure"
app:layout_anchorGravity="bottom|right|end"
android:src="#drawable/ic_delete_white_36dp"
android:tint="#android:color/white"
app:backgroundTint="#D463C3" />
</android.support.design.widget.CoordinatorLayout>
Layout for adapter rows with CardView
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:cardview="http://schemas.android.com/apk/res-auto"
android:id="#+id/cardRecord"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:background="#eeeeee"
cardview:cardCornerRadius="5dp"
cardview:cardElevation="5dp" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="8dp" >
<TextView
android:id="#+id/tvDisplayTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:textColor="#FF0000" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/tvDisplayAngle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:text="#string/angle_"
android:textColor="#525657"
android:textSize="18sp" />
<TextView
android:id="#+id/tvDisplayAzimuth"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:text="#string/angle_"
android:textColor="#525657"
android:textSize="14sp" />
<TextView
android:id="#+id/tvDisplayBearing"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:text="#string/angle_"
android:textColor="#525657"
android:textSize="14sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/tvDisplayPitch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="12dp"
android:text="#string/angle_"
android:textColor="#525657"
android:textSize="14sp" />
<TextView
android:id="#+id/tvDisplayRoll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="12dp"
android:text="#string/angle_"
android:textColor="#525657"
android:textSize="14sp" />
</LinearLayout>
<TextView
android:id="#+id/tvDisplayDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:text="#string/date_"
android:textColor="#9EA9AD"
android:textSize="14sp" />
<TextView
android:id="#+id/tvDisplayNote"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:text=""
android:textColor="#828A8C"
android:textSize="14sp" />
</LinearLayout>
How it looks

Does your RecyclerView show ImageView or TextView only?
If yes, because your ViewHolder Constructor is wrong. You have to call super(itemView) in your ViewHolder's Constructor, itemView is the view which is displayed as a row in RecyclerView. To fix your issue, I think you should change your code as below:
public ViewHolder createholder(ViewGroup parent, int viewtype) {
if (typeg.equals("image") || typeg.equals("text")) {
View root = LayoutInflater.from(parent.getContext())
.inflate(R.layout.listitems, parent, false);
return new ViewHolder(root, typeg.equals("text"));
}
//FIXME: As my expericence you should NOT return null for ViewHolder. You have to sure the typeg is one of "image" or "text". I think you should change typeg to Boolean variable to not return null ViewHolder.
return null;
}
public class ViewHolder extends RecyclerView.ViewHolder {
public ImageView imgg;
public TextView txtg;
public CardView cardg;
public ViewHolder(View itemView, boolean isTypeText) {
super(itemView);
imgg = (ImageView) itemView.findViewById(R.id.Img);
cardg = (CardView) itemView.findViewById(R.id.card_view);
txtg = (TextView) itemView.findViewById(R.id.Txt);
imgg.setVisibility(isTypeText ? View.GONE : View.VISIBLE);
txtg.setVisibility(isTypeText ? View.VISIBLE : View.GONE);
}
}

Here is the proper Documentation Read and And Follow it.
You must be Doing Something Wrong in Gradle.!
so, the issue was Your XML was not showing CardView in it here we go.!
Add following Dependencies.!
compile 'com.android.support:design:25.3.1'
compile 'com.android.support:support-v4:25.3.1'
compile 'com.android.support:cardview-v7:25.3.1'
compile 'com.android.support:recyclerview-v7:25.3.1'
compile 'com.android.support:appcompat-v7:25.3.1'
testCompile 'junit:junit:4.12'
Here is Your XML is Working Perfectly Fine.!
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card_view"
android:layout_gravity="center"
android:layout_width="200dp"
android:layout_height="200dp"
card_view:cardCornerRadius="4dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
>
<ImageView
android:layout_height="wrap_content"
android:layout_weight="0.25"
android:layout_width="wrap_content"
android:layout_margin="10dp"
android:id="#+id/Img"
android:scaleType="center"
android:maxHeight="100dp"
android:maxWidth="150dp"/>
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_weight="0.25"
android:id="#+id/Txt"
android:layout_gravity="center_horizontal|center_vertical"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
Now Clean and Rebuild Your Project.!
ok try this its Working Fine.now.!

Is it because you are removing card_view like so?
((ViewGroup)image.getParent()).removeView(root.findViewById(R.id.card_view));

I am attaching a image to a recycler view which is being downloaded from server, but recycler view is not showing any image

The recycler view is showing other details in activity, except the image. I am loading an image through AsyncTask in getImage(). What am I doing wrong?
Here's my code:
MainActivity.java
int i;
Bitmap bitmap,imageOfPoday;
RecyclerView rvPoday;
ProductAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
NavigationDrawerFragment drawerFragment = (NavigationDrawerFragment)getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), toolbar);
pd = ProgressDialog.show(MainActivity.this, "Please Wait...", null, true, true);
callPoday(PODAY_URL);
}
public List<Product> getDataPoday() {
List<Product> data=new ArrayList<>();
for(i = 0; i < parsedPODAY_ID.size(); i++) {
Product current=new Product();
current.productName=parsedPODAY_NAME.get(i);
current.price=parsedPODAY_OFFPRICE.get(i);
current.pImage=getImage("http://www.tontosworld.com/img/productimages/" + parsedPODAY_P_IMG.get(i));
Toast.makeText(this,current.pImage+"",Toast.LENGTH_LONG).show();
data.add(current);
}
return data;
}
public Bitmap getImage(String s) {
LoadImageTask task=new LoadImageTask();
task.execute(s);
return imageOfPoday;
}
class LoadImageTask extends AsyncTask<String,String,Bitmap> {
#Override
protected Bitmap doInBackground(String... strings) {
try {
bitmap = BitmapFactory.decodeStream((InputStream) new URL(strings[0]).getContent());
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
#Override
protected void onPostExecute(Bitmap b) {
super.onPostExecute(b);
if(b == null) {
Toast.makeText(MainActivity.this,"Error in loading image",Toast.LENGTH_LONG).show();
}
else {
imageOfPoday=b;
Toast.makeText(MainActivity.this,"This is for image"+imageOfPoday,Toast.LENGTH_LONG).show();
}
}
}
ProductAdapter.java
public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.MyViewHolder> {
public LayoutInflater inflater;
List<Product> data= Collections.emptyList();
public ProductAdapter(Context context,List<Product> data){
inflater = LayoutInflater.from(context);
this.data = data;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = inflater.inflate(R.layout.recycler_view_single,parent,false);
MyViewHolder holder = new MyViewHolder(v);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Product current = data.get(position);
holder.name.setText(current.productName);
holder.price.setText(current.price);
holder.image.setImageBitmap(current.pImage);
}
#Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView name,price;
ImageView image;
public MyViewHolder(View itemView) {
super(itemView);
name = (TextView)itemView.findViewById(R.id.rvItemName);
price = (TextView)itemView.findViewById(R.id.rvItemPrice);
image = (ImageView)itemView.findViewById(R.id.rvItemImage);
}
}
}
Product.java
public class Product {
String productName, price;
Bitmap pImage;
}
recycler_view_single.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="?android:selectableItemBackground">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="#+id/rvItemImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="#mipmap/ic_launcher" />
<TextView
android:id="#+id/rvItemName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Name" />
<TextView
android:id="#+id/rvItemPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Price" />
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
activity_main.xml
<android.support.v4.widget.DrawerLayout 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:id="#+id/drawer_layout">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:orientation="vertical">
<include
android:id="#+id/app_bar"
layout="#layout/app_bar"
android:layout_height="wrap_content"
android:layout_width="match_parent"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Product of the day"
android:textSize="25sp"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:textColor="#000"/>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/rvProductOfTheDay">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
<fragment
android:id="#+id/fragment_navigation_drawer"
android:layout_width="280dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="#layout/fragment_navigation_drawer"
android:name="com.tontosworld.tontosworld.NavigationDrawerFragment">
</fragment>
</android.support.v4.widget.DrawerLayout>
Thanks for your help.

You are missing the update notice for your adapter (which displays the data).
Everytime you update your List, you need to call
adapter.notifyDataSetChanged();
//if you only change one item, and use recyclerview, call:
adapter.notifyItemChanged();