Menu
Using an RecyclerView inside NestedScrollView is creating a strange blank space (like bottom padding) in the activity, causing unnecessary scroll, because there aren't more elements to show.
This padding grows with the RecyclerView, I mean:
If in the RecyclerView there are 0 to 2 elements, this fit perfect on the screen, and there are no scroll. Here works well.
If in the RecyclerView there are 3 to 5 elements, these elements continue to fit on the screen BUT in this case there are more blank space that causing the unnecessary scroll.
With more elements, the blank space continue growing and creating more and more scroll.
Here is my XML:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.ibosca.thub.ChannelProfileActivity">
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<de.hdodenhof.circleimageview.CircleImageView xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/channelPicture"
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:civ_border_color="#FF000000"
app:civ_border_width="2dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="@+id/channelName"
android:layout_width="256dp"
android:layout_height="90dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:gravity="center_vertical"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:textAlignment="center"
android:textColor="@android:color/black"
android:textSize="20sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/channelPicture"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="@+id/description"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="8dp"
android:textAlignment="center"
android:textSize="15sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/channelPicture"
app:layout_constraintVertical_bias="0.0" />
<View
android:id="@+id/line1"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="8dp"
android:background="@android:color/black"
app:layout_constraintTop_toBottomOf="@+id/description" />
<TextView
android:id="@+id/contentsText"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="8dp"
android:text="@string/contents"
android:textColor="@android:color/black"
android:textAlignment="center"
android:textSize="17sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/line1"
app:layout_constraintVertical_bias="0.0" />
<View
android:id="@+id/line2"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="8dp"
android:background="@android:color/black"
app:layout_constraintTop_toBottomOf="@+id/contentsText" />
<android.support.v7.widget.RecyclerView
android:id="@+id/contentList"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
app:layout_constraintTop_toBottomOf="@+id/line2"/>
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.constraint.ConstraintLayout>
What it's causing this space? How can I remove it?
EDIT: ISSUE
Here you can see the error: https://www.youtube.com/watch?v=6nSc4l2c2jg
EDIT 2: RECYCLER
Adapter:
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.ibosca.thub.R;
import com.ibosca.thub.models.Channel;
import com.ibosca.thub.models.Content;
import com.ibosca.thub.models.ContentList;
import com.squareup.picasso.Picasso;
import java.text.SimpleDateFormat;
import de.hdodenhof.circleimageview.CircleImageView;
public class ContentAdapter extends RecyclerView.Adapter<ContentAdapter.MyViewHolder> {
private ContentList contentList;
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView title;
public CircleImageView picture;
public TextView channel;
public TextView lastEdit;
public ImageView badge;
public MyViewHolder(View view) {
super(view);
title = (TextView) view.findViewById(R.id.title);
picture = (CircleImageView) view.findViewById(R.id.picture);
channel = (TextView) view.findViewById(R.id.channel);
lastEdit = (TextView) view.findViewById(R.id.lastEdit);
badge = (ImageView) view.findViewById(R.id.badge);
}
}
public ContentAdapter(ContentList contentList) {
this.contentList = contentList;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.content_row, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
//Get Content
Content content = contentList.getContents().get(position);
//Set title
holder.title.setText(content.getTitle());
//Set last edit, channel and picture
holder.lastEdit.setText(new SimpleDateFormat("dd/MM/yy").format(content.getLastEdit()));
Channel channel = contentList.findChannelById(content.getChannelId());
String channelPicture = channel.getPicture();
holder.channel.setText(channel.getName());
Picasso.with(holder.picture.getContext()).load(channelPicture).into(holder.picture);
holder.badge.setVisibility(View.VISIBLE);
if(content.isRead()){
holder.badge.setVisibility(View.GONE);
}
}
@Override
public int getItemCount() {
return contentList.getContents().size();
}
}
Recycler View (each row):
<?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="wrap_content"
android:background="?android:attr/selectableItemBackground"
android:clickable="true"
android:focusable="true"
android:orientation="vertical"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="10dp">
<de.hdodenhof.circleimageview.CircleImageView xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/picture"
android:layout_width="55dp"
android:layout_height="55dp"
android:src="@drawable/ic_launcher_background"
app:civ_border_color="#FF000000"
app:civ_border_width="2dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" />
<TextView
android:id="@+id/title"
android:layout_height="27dp"
android:layout_alignParentTop="true"
android:layout_marginStart="8dp"
android:layout_weight=".90"
android:layout_width="0dp"
android:ellipsize="end"
android:maxLines="1"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:singleLine="true"
android:textColor="@android:color/black"
android:textSize="15sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="@+id/picture"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="@+id/picture"
app:layout_constraintTop_toTopOf="@+id/picture"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="@+id/channel"
android:layout_width="0dp"
android:layout_height="23dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_weight=".90"
android:ellipsize="end"
android:maxLines="1"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:singleLine="true"
android:textSize="15sp"
app:layout_constraintBottom_toBottomOf="@+id/picture"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="@+id/picture"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.51" />
<TextView
android:id="@+id/lastEdit"
android:layout_width="78dp"
android:layout_height="23dp"
android:gravity="bottom|end"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" />
<ImageView
android:id="@+id/badge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:contentDescription="notificationBadge"
android:src="@drawable/orange_badge"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.09"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
</android.support.constraint.ConstraintLayout>
815
Stay organized with collections Save and categorize content based on your preferences. NestedScrollView is just like ScrollView , but it supports acting as both a nested scrolling parent and child on both new and old versions of Android. Nested scrolling is enabled by default.
To be able to scroll through a vertical list of items that is longer than the screen, you need to add a vertical scrollbar. Inside RecyclerView , add an android:scrollbars attribute set to vertical .
RecyclerView makes it easy to efficiently display large sets of data. You supply the data and define how each item looks, and the RecyclerView library dynamically creates the elements when they're needed. As the name implies, RecyclerView recycles those individual elements.
GridLayoutManager arranges the items in a two-dimensional grid, like the squares on a checkerboard. Using a RecyclerView with GridLayoutManager provides functionality like the older GridView layout.
In you xml file, change:
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
to
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="false">
Or
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With