Develop Reference

Recycler View Items Not loading using firebase [duplicate]

This question already has answers here:
FirestoreAdapter not working to populate a Recycler View
(2 answers)
Closed 3 years ago.
ONStart Code
#Override
public void onStart() {
super.onStart();
DatabaseReference cartlistref = FirebaseDatabase.getInstance().getReference("Users").child(firebaseUser.getUid()).child("Cart");
FirebaseRecyclerAdapter<Cart, CartViewHolder> adapter = new FirebaseRecyclerAdapter<Cart, CartViewHolder>(
Cart.class,
R.layout.cart_items,
CartViewHolder.class,
cartlistref
) {
#Override
protected void populateViewHolder(CartViewHolder holder, Cart cart, int i) {
holder.pname.setText(cart.getName());
holder.pprice.setText(cart.getPrice());
//holder.quantity.setNumber(cart.getQuantity());
}
};
adapter.notifyDataSetChanged();
recyclerView.setAdapter(adapter);
}
CartViewHolder Code
public class CartViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView pname,pprice ;
public ImageView pimage;
public ElegantNumberButton quantity;
ItemClickListener itemClickListener;
public CartViewHolder(#NonNull View itemView) {
super(itemView);
pname = itemView.findViewById(R.id.pname);
pprice = itemView.findViewById(R.id.pprice);
quantity = itemView.findViewById(R.id.qty);
pimage = itemView.findViewById(R.id.pimage);
}
#Override
public void onClick(View v) {
itemClickListener.onClick(v,getAdapterPosition(),false);
}
public void setItemClickListener(ItemClickListener itemClickListener) {
this.itemClickListener = itemClickListener;
}
}
Cart items xml code
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal" android:layout_width="match_parent"
android:padding="16dp"
android:layout_height="160dp"
android:background="?attr/selectableItemBackground"
android:clickable="true">
<ImageView
android:id="#+id/pimage"
android:layout_width="151dp"
android:layout_height="match_parent"
app:srcCompat="#drawable/basket" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="150dp">
<TextView
android:id="#+id/pname"
android:layout_width="match_parent"
android:layout_height="57dp"
android:text="Product Name"
android:textSize="25sp"
android:textAlignment="center"
android:layout_gravity="center"
android:textAppearance="#style/TextAppearance.AppCompat.Medium"
android:textColor="#android:color/black"
android:textStyle="normal|bold" />
<TextView
android:text="Product price"
android:textSize="18sp"
android:textAlignment="center"
android:layout_gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/pprice"
android:layout_marginTop="4dp" />
<com.cepheuen.elegantnumberbutton.view.ElegantNumberButton
android:textSize="18sp"
android:layout_width="200dp"
android:layout_height="50dp"
android:id="#+id/qty"
android:visibility="visible"
android:layout_marginTop="10dp"
android:layout_gravity="center"/>
</LinearLayout>
</androidx.cardview.widget.CardView>
Cart Fragment code
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:fancy="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.hackathon.shoppy.fragments.CartFragment">
<RelativeLayout
android:id="#+id/rill"
android:background="#color/colorPrimaryDark"
android:layout_alignParentTop="true"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/totalamt"
android:textSize="20sp"
android:gravity="center"
android:textAlignment="center"
android:textColor="#android:color/white"
android:text="Total Amount = "
android:layout_width="match_parent"
android:layout_height="50dp"/>
</RelativeLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/cartList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
fancy:layout_constraintBottom_toTopOf="#+id/EditDetails"
fancy:layout_constraintEnd_toEndOf="parent"
fancy:layout_constraintStart_toStartOf="parent"
fancy:layout_constraintTop_toTopOf="parent"
android:layout_below="#+id/rill"
android:layout_above="#+id/checkout"/>
<mehdi.sakout.fancybuttons.FancyButton
android:id="#+id/checkout"
android:layout_width="280dp"
android:layout_height="66dp"
android:layout_alignParentBottom="true"
android:layout_centerInParent="true"
android:textSize="20sp"
fancy:fb_defaultColor="#7ab800"
fancy:fb_radius="10dp"
fancy:fb_text="Proceed To Checkout"
fancy:fb_textColor="#FFFFFF" />
</RelativeLayout>
Firebase Database Structure
Here is the firebase database structure
I have tried the above code
I want to load cart items of a specific user from the firebase database
The view is loading but the recycler view items arent showing up
Also the app is not crashing and no errors in logcat

<androidx.recyclerview.widget.RecyclerView
android:id="#+id/cartList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
fancy:layout_constraintBottom_toTopOf="#+id/EditDetails"
fancy:layout_constraintEnd_toEndOf="parent"
fancy:layout_constraintStart_toStartOf="parent"
fancy:layout_constraintTop_toTopOf="parent"
android:layout_below="#+id/rill"
android:layout_above="#+id/checkout"/>
here is your problem. You are telling recycler view to WRAP CONTENT. problem is, that in moment of creation, content is empty, so recycler view has height zero.
Try to use
android:layout_width="match_parent"
android:layout_height="match_parent"
and experiment with height. But width for sure better to be left as match_parent

I think its because of wrap content, try to fill color in recylerview with blue or something, if you are not able to see then change to match parent

How to implement EmojiTextView in fragment?

I have an emoji in one of my data in cloud firestore. How do I can make the value readable in my fragment,recycleview? When adding old emoji such as 😭, it shows in my recycler view but when ading new emoji such as "🥺". Is it because of my android keyboard or language didn't update? I hope anyone can solve my problem.
ForumAdapter.java
public ForumHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
android.view.View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardviewforumtitle,parent,false);
EmojiCompat.init(new BundledEmojiCompatConfig(v.getContext()));
return new ForumHolder(v);
}
class ForumHolder extends RecyclerView.ViewHolder{
EmojiTextView textViewTitle;
EmojiTextView textViewDescription;
EmojiTextView timeStamp;
/*
TextView textViewTitle;
TextView textViewDescription;
TextView timeStamp;*/
public ForumHolder(View itemView) {
super(itemView);
textViewTitle = itemView.findViewById(R.id.tvTitle);
textViewDescription = itemView.findViewById(R.id.tvDescription);
timeStamp = itemView.findViewById(R.id.tvTimestamp);
textViewTitle.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int position = getAdapterPosition();
// NO_POSITION to prevent app crash when click -1 index
if(position != RecyclerView.NO_POSITION && listener !=null ){
listener.onItemClick(getSnapshots().getSnapshot(position),position);
}
}
});
}
}
Because I got this error
java.lang.ClassCastException: androidx.appcompat.widget.AppCompatTextView cannot be cast to androidx.emoji.widget.EmojiTextView
cardviewforumtitle.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="horizontal"
android:weightSum="2">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="#+id/tvTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="name"
android:textSize="15sp"
android:textStyle="bold" />
<TextView
android:id="#+id/tvDescription"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="description"
android:textSize="15sp" />
<TextView
android:id="#+id/tvTimestamp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="timestamp"
android:textSize="15sp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1">
<ImageView
android:id="#+id/profilePic"
android:layout_width="match_parent"
android:layout_height="match_parent"></ImageView>
</LinearLayout>
</LinearLayout>

Try replacing the TextViews with
<androidx.emoji.widget.EmojiTextView
..../>
in the layout.

How to cover complete Background Color in recycler View?

Image Description is here
enter image description here
I did Match Parent for the Layout but then it is divided into several
scrollable sections. How do i fill the remaining bottom background
color of this Recycler View ?
Here is my code for the layout :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:gravity="center_horizontal"
android:layout_height="wrap_content"
android:id="#+id/teacher_relative">
<LinearLayout
android:id="#+id/linr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="6dp"
android:background="#drawable/selector_item_main_menu"
android:orientation="vertical">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:src="#drawable/home_fund_raising" />
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:maxLines="1"
android:shadowColor="#393939"
android:shadowDx="2.0"
android:shadowDy="1.0"
android:shadowRadius="2.0"
android:text="ZED"
android:textAlignment="center"
android:textColor="#android:color/white"
android:textSize="12sp" />
</LinearLayout>
<TextView
android:id="#+id/txt_notify"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="#drawable/bg_white_circle"
android:gravity="center"
android:layout_marginLeft="77dp"
android:text="0"
android:visibility="gone"
android:textSize="13sp"
android:textColor="#color/red"
android:textStyle="bold" />
Java Code :
recyclerView = findViewById(R.id.recyclerView);
// set a GridLayoutManager with default vertical orientation and 3 number of columns
GridLayoutManager gridLayoutManager = new GridLayoutManager(getApplicationContext(),3);
recyclerView.setLayoutManager(gridLayoutManager);
I am using Grid Layout
Code for Adapter Class :
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
MyTeacherModel myTeacherModel = myTeacherModelsList.get(position);
holder.imageView.setImageDrawable(mContext.getResources().getDrawable(myTeacherModel.getImages()));
holder.textView.setText(myTeacherModel.getText());
holder.teacher_relative.setBackgroundColor(Functions.getBackColor());
}
#Override
public int getItemCount() {
return myTeacherModelsList.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
public TextView textView, txt_notify;
public ImageView imageView;
DataModel item;
public LinearLayout linr;
RelativeLayout teacher_relative;
public ViewHolder(View itemView) {
super(itemView);
textView = (TextView) itemView.findViewById(R.id.textView);
imageView = (ImageView) itemView.findViewById(R.id.imageView);
linr = (LinearLayout) itemView.findViewById(R.id.linr);
txt_notify = (TextView) itemView.findViewById(R.id.txt_notify);
teacher_relative = itemView.findViewById(R.id.teacher_relative);
}
}

You should give background to the container view that holds the recyclerview.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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:background="#drawable/selector_item_main_menu">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/menubar"
android:id="#+id/myRcv"/>
</RelativeLayout>

How to make Horizontal line attach textview in recyclerview?

Am having a doubt regarding how to make the horizontal view to touch the textview while populating in recyclerview , Now let me explain briefly i having a horizontal recyclerview in that adapter view holder i have horizontal view at the end of the textview which is center vertical to that textview, so when items are added each view must touch the textview like vertical dotted timeline but the view is not touching the textview as shown in the below image.
Now let me post what i have tried so far
This is the layout that holding recyclerview:
<RelativeLayout android:layout_width="wrap_content"
android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android" >
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/recyclerview"/>
</RelativeLayout>
Here am using that recyclerview in activity:
Recyclerview recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false));
recyclerView.setHasFixedSize(true);
TrackingAdapter mAdapter = new TrackingAdapter(this.taskLogModelList,mTaskModel.getTaskID(),fm,String.valueOf(mLastLocation.getLatitude()),String.valueOf(mLastLocation.getLongitude()));
recyclerView.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
Here is the adapter am using :
public class TrackingAdapter extends RecyclerView.Adapter<TrackingAdapter.ViewHolder> {
private List<TaskLogModel> taskStatusFlowModels;
private D2DKnocks appclass;
private String Lat,Long;
private FragmentManager fragmentManager;
private String TaskID;
DateFormat date,msimpleDateformat;
public TrackingAdapter(List<TaskLogModel> taskStatusFlowModels,String TaskID,FragmentManager context,String Lat,String Long) {
this.taskStatusFlowModels = taskStatusFlowModels;
this.fragmentManager=context;
date=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
msimpleDateformat = new SimpleDateFormat("hh.mm a");
this.Lat=Lat;
this.TaskID=TaskID;
this.Long=Long;
appclass=((D2DKnocks)D2DKnocks.getContext());
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
private AvertaTextview txt_time;
private Rubik txt_delivered;
// private AvertaButton btn_start;
private RelativeLayout layout;
private View view_right;
public ViewHolder(View itemView) {
super(itemView);
txt_time = itemView.findViewById(R.id.txt_time);
// btn_start=itemView.findViewById(R.id.start);
layout=itemView.findViewById(R.id.layout);
txt_delivered = itemView.findViewById(R.id.txt_delivered);
view_right = (View) itemView.findViewById(R.id.right_view_line);
layout.setOnClickListener(this);
}
#Override
public void onClick(View view) {
TaskLogModel taskLogModel=taskStatusFlowModels.get(getAdapterPosition());
if(taskLogModel.getTaskStatusID()==0){
TaskStatusDialog taskStatusDialog=new TaskStatusDialog();
Bundle bundle=new Bundle();
bundle.putInt("Size",taskStatusFlowModels.size());
bundle.putString("Lat",Lat);
bundle.putString("Long",Long);
bundle.putString("TaskID",TaskID);
taskStatusDialog.setArguments(bundle);
taskStatusDialog.show(fragmentManager,"show");
}
}
}
#Override
public TrackingAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_view_assignment_status, parent, false);
return new ViewHolder(itemView);
}
#Override
public void onBindViewHolder(TrackingAdapter.ViewHolder holder, int position) {
if (taskStatusFlowModels.get(position).getTaskStatusID() > 0) {
StatusModel statusFlowModel = getStatusName(taskStatusFlowModels.get(position).getTaskStatusID());
holder.txt_delivered.setText(statusFlowModel.getStatus());
holder.txt_delivered.setBackgroundResource(R.drawable.btn_arrived_bg);
try {
Date uppdateDate=date.parse(taskStatusFlowModels.get(position).getUpdateDateTime());
String updatedDate=msimpleDateformat.format(uppdateDate);
String[] each = updatedDate.split(" ");
String str = each[1].replace("AM", "am").replace("PM","pm");
// SpannableString ss1= new SpannableString(each[0]);
// SpannableString ss2=new SpannableString(each[1]);
// ss1.setSpan(new AbsoluteSizeSpan(20), 0, each[0].length(), SPAN_INCLUSIVE_INCLUSIVE);
// ss2.setSpan(new AbsoluteSizeSpan(15), 0, each[1].length(), SPAN_INCLUSIVE_INCLUSIVE);
// CharSequence finalText = TextUtils.concat(ss1, " ", ss2);
holder.txt_time.setText(each[0]+" "+str);
} catch (ParseException e) {
e.printStackTrace();
}
GradientDrawable gradientDrawable = (GradientDrawable) holder.txt_delivered.getBackground();
gradientDrawable.setColor(Color.parseColor(statusFlowModel.getStatusColor()));
} else {
holder.txt_delivered.setText("Choose");
holder.txt_delivered.setBackgroundResource(R.drawable.btn_choose_bg);
holder.txt_delivered.setTextColor(Color.parseColor("#b1b1b1"));
}
if(taskStatusFlowModels.size()-1==position){
holder.view_right.setVisibility(View.GONE);
}
else {
holder.view_right.setVisibility(View.VISIBLE);
}
}
public StatusModel getStatusName(Integer statusID){
for (int i=0;i<appclass.getStatusModelist().size();i++){
if (appclass.getStatusModelist().get(i).getStatusID().equals(statusID)){
return appclass.getStatusModelist().get(i);
}
}
return null;
}
#Override
public int getItemCount() {
return taskStatusFlowModels.size();
}
}
And below is the view holder layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="vertical">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/layout">
<com.trident.Hawkersky.service.CustomFonts.AvertaTextview
android:id="#+id/txt_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:drawableLeft="#drawable/ic_checked"
android:drawablePadding="10dp"
android:layout_centerHorizontal="true"
android:gravity="center"
android:text="10.00 am"
android:textColor="#444444"
android:textSize="12sp"
/>
<View
android:id="#+id/vertical_line"
android:layout_width="30dp"
android:layout_height="20dp"
android:layout_centerHorizontal="true"
android:layout_below="#+id/txt_time"
android:background="#drawable/vertical_dotted_line"
android:layerType="software"
android:visibility="visible" />
<RelativeLayout
android:layout_width="wrap_content"
android:layout_below="#+id/vertical_line"
android:layout_height="wrap_content">
<com.trident.Hawkersky.service.CustomFonts.Rubik
android:id="#+id/txt_delivered"
android:layout_centerHorizontal="true"
android:layout_width="wrap_content"
android:layout_height="#dimen/thirty"
android:layout_marginBottom="5dp"
android:singleLine="true"
android:padding="#dimen/seven"
android:background="#drawable/btn_delivered_bg"
android:gravity="center"
android:text="Delivered"
android:textAllCaps="true"
android:textColor="#FFF"
android:textSize="13sp"
android:textStyle="bold" />
<View
android:id="#+id/right_view_line" <--- this is the view
android:layout_width="#dimen/hundred"
android:layout_height="5dp"
android:layout_alignBottom="#+id/txt_delivered"
android:layout_gravity="center_vertical"
android:layout_marginBottom="12dp"
android:layout_toEndOf="#+id/txt_delivered"
android:layout_toRightOf="#+id/txt_delivered"
android:background="#drawable/dotted"
android:layerType="software"
android:visibility="visible" />
</RelativeLayout>
</RelativeLayout>
</RelativeLayout>
Now what i need is i need that view to attach to the textview , but am getting like image above how to solve it.

Please try this and let know if you need further modifications.
<?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:id="#+id/layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="vertical">
<com.trident.Hawkersky.service.CustomFonts.AvertaTextview
android:id="#+id/txt_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginLeft="5dp"
android:layout_marginStart="5dp"
android:drawableLeft="#drawable/ic_checked"
android:drawablePadding="10dp"
android:gravity="center"
android:text="10.00 am"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="#+id/txt_delivered"
app:layout_constraintRight_toRightOf="#+id/txt_delivered"
android:textColor="#444444"
android:textSize="12sp"
/>
<View
android:id="#+id/vertical_line"
android:layout_width="30dp"
android:layout_height="20dp"
app:layout_constraintLeft_toLeftOf="#+id/txt_delivered"
app:layout_constraintRight_toRightOf="#+id/txt_delivered"
android:layout_below="#+id/txt_time"
android:layout_centerHorizontal="true"
app:layout_constraintTop_toBottomOf="#+id/txt_time"
android:background="#color/colorPrimaryDark"
android:layerType="software"
android:visibility="visible"/>
<com.trident.Hawkersky.service.CustomFonts.Rubik
android:id="#+id/txt_delivered"
android:layout_width="wrap_content"
android:layout_height="#dimen/thirty"
android:layout_marginBottom="5dp"
android:background="#drawable/btn_delivered_bg"
android:gravity="center"
app:layout_constraintTop_toBottomOf="#+id/vertical_line"
android:padding="#dimen/seven"
android:singleLine="true"
android:text="Delivered"
android:textAllCaps="true"
android:textColor="#FFF"
android:textSize="13sp"
android:textStyle="bold"/>
<View
android:id="#+id/right_view_line"
android:layout_width="100dp"
android:layout_height="5dp"
app:layout_constraintTop_toTopOf="#+id/txt_delivered"
app:layout_constraintBottom_toBottomOf="#+id/txt_delivered"
app:layout_constraintLeft_toRightOf="#+id/txt_delivered"
android:background="#drawable/dotted"
android:layerType="software"
android:visibility="visible"/>
</android.support.constraint.ConstraintLayout>
Sorry, I had to use ConstraintLayout. If you haven't been using it before, please add this implementation 'com.android.support.constraint:constraint-layout:1.0.2'1 to your module level build.gradle.

RecyclerView extra empty gap between items

1.i just implemented some recyclerviews, some of their items have extra empty space. this space sometimes disappears after some scrolling. i have tried every way you could think! i have changed heights to wrap content but still issue exists!
here is the screenshot:
Recyclerview empty space
here is item xml:
<android.support.v7.widget.CardView
android:id="#+id/btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffffff"
android:gravity="center"
android:orientation="horizontal"
android:adjustViewBounds="true"
android:padding="8dp"
android:layout_margin="6dp"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/banner_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:src="#drawable/no_image_banner" />
<TextView
android:id="#+id/txtHey"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:gravity="center"
android:maxLength="20"
android:text="sadas"
android:textColor="#4d4a46"
android:textSize="11dp"
android:textStyle="bold" />
<TextView
android:id="#+id/txtHi"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="2dp"
android:gravity="center"
android:text="sadas"
android:textColor="#999999"
android:textSize="9dp" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:gravity="center_vertical">
<TextView
android:id="#+id/txtPrice"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="sadas"
android:textColor="#888888"
android:textSize="9dp" />
<LinearLayout
android:id="#+id/price_cancel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="6dp"
android:background="#888888"
android:orientation="horizontal" />
</FrameLayout>
<TextView
android:id="#+id/txtFinalPrice"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="sadas"
android:textColor="#3dc24d"
android:textSize="9dp" />
<TextView
android:id="#+id/txtHello"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:text="hey"
android:textSize="9dp"
android:visibility="gone" />
</LinearLayout>
</android.support.v7.widget.CardView>
main page xml:
<android.support.design.widget.AppBarLayout
android:id="#+id/topBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<include
layout="#layout/toolbar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.design.widget.AppBarLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/product_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="6dp"
>
</android.support.v7.widget.RecyclerView>
<TextView
android:id="#+id/request_results"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textSize="21dp"
android:textStyle="bold" />
</RelativeLayout>
second question is i used some recyclerviews inside a nested scroll view to prevent scrolling issues. everything is good but in lower versions of android like kitkat i have problem with scrolling(cause nested wont work on sdk<21 ) . i could use a normal scrollview that works well on both versions but normal scroll view doesnt work with coordinator layout and so appbar layout hiding behaviour wont work!
can you help me with these problems please?
here is the adapter class:
private ArrayList<Struct> structs;
OnItemListener onItemListener;
private boolean isGrid;
private int Tab;
public Adapter_Recycler(ArrayList<Struct> structs, OnItemListener onItemListener, int Tab, boolean isGrid) {
this.structs = structs;
this.onItemListener = onItemListener;
this.Tab = Tab;
this.isGrid = isGrid;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = (LayoutInflater) parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = null;
if (Tab == 2) {
view = inflater.inflate(R.layout.item_product_color, parent, false);
}
if (Tab == 1 && isGrid == false) {
view = inflater.inflate(R.layout.item_product_list, parent, false);
}
if (Tab == 1 && isGrid) {
view = inflater.inflate(R.layout.item_product_list, parent, false);
}
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolder holder, final int position) {
if (Tab == 2) {
holder.txtHey.setText(structs.get(position).hey);
holder.txtPrice.setText(structs.get(position).hi);
holder.txtHi.setVisibility(View.GONE);
holder.PriceCancel.setVisibility(View.GONE);
holder.txtFinalPrice.setVisibility(View.GONE);
holder.txtHey.setTypeface(Activity_Main.SANS);
holder.txtPrice.setTypeface(Activity_Main.SANS);
Glide
.with(Activity_Main.CONTEXT)
.load(structs.get(position).image)
.placeholder(R.drawable.background_card)
.fitCenter()
.into(holder.banner_image);
}
if (Tab == 1) {
holder.txtHey.setText(structs.get(position).hey);
holder.txtHi.setText(structs.get(position).hi);
holder.txtPrice.setText(structs.get(position).price);
holder.txtFinalPrice.setText(structs.get(position).final_price);
if (holder.txtFinalPrice.getText().toString() == "") {
holder.PriceCancel.setVisibility(View.GONE);
} else {
holder.PriceCancel.setVisibility(View.VISIBLE);
}
holder.txtHey.setTypeface(Activity_Main.SANS);
holder.txtHi.setTypeface(Activity_Main.SANS);
holder.txtPrice.setTypeface(Activity_Main.SANS);
holder.txtFinalPrice.setTypeface(Activity_Main.SANS);
Glide
.with(Activity_Main.CONTEXT)
.load(structs.get(position).image)
.placeholder(R.drawable.background_card)
.fitCenter()
.into(holder.banner_image);
}
holder.linearLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (onItemListener != null) {
onItemListener.onItemSelect(position);
}
}
});
holder.txtHello.setText(structs.get(position).hello);
holder.txtHello.setTypeface(Activity_Main.SANS);
}
#Override
public int getItemCount() {
return structs.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
CardView linearLayout;
ImageView banner_image;
TextView txtHey;
TextView txtHi;
TextView txtHello;
TextView txtPrice;
TextView txtFinalPrice;
LinearLayout PriceCancel;
public ViewHolder(View itemView) {
super(itemView);
linearLayout = (CardView) itemView.findViewById(R.id.btn);
banner_image = (ImageView) itemView.findViewById(R.id.banner_image);
txtHey = (TextView) itemView.findViewById(R.id.txtHey);
txtHi = (TextView) itemView.findViewById(R.id.txtHi);
txtHello = (TextView) itemView.findViewById(R.id.txtHello);
txtPrice = (TextView) itemView.findViewById(R.id.txtPrice);
txtFinalPrice = (TextView) itemView.findViewById(R.id.txtFinalPrice);
PriceCancel = (LinearLayout) itemView.findViewById(R.id.price_cancel);
}
}
}
UPDATE:
the place holder aspect ratio must not be much different from the images aspect ratio. they should be the same.

If possible then provide adapter class because may be some issue with onCreateViewHolder with LayoutInflater.

I finally figured out what the problem was!
that extra space was because of
" .placeholder(R.drawable.background_card) " !
problem solved after removing the placeholder.
ofcourse issue is with the image! not placeholder.