Develop Reference

Single Row Shows Insight RecyclerView

I have recyclerview and it shows just single records instead of two records. I have searched many post on google and found to modify height of listview items from "match_parent " To "Wrap_Content" hence I did the same but still it shows single records.
Activity Mumbai_Male
<?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=".MumbaiMale">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/myImg"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginTop="20dp"
android:layout_marginLeft="10dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/name"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/age"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/education"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
android:scrollbars="vertical"
android:id="#+id/recyclerView" />
</LinearLayout>
CustomeAdapter is:
package com.maheshwaghela.mahesh.rukhivivah;
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;
public class CustomAdapter extends
RecyclerView.Adapter<CustomAdapter.ViewHolder> {
private MumbaiMale.IconData[] data;
public CustomAdapter (MumbaiMale.IconData[] data) {
this.data = data;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View listItem= layoutInflater.inflate(R.layout.activity_mumbai_male, parent, false);
ViewHolder viewHolder = new ViewHolder(listItem);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.name.setText(data[position].getPname());
holder.age.setText(data[position].getPage());
holder.education.setText(data[position].getPedu());
holder.imageView.setImageResource(data[position].getImgId());
}
#Override
public int getItemCount() {
return data.length;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public ImageView imageView;
public TextView name;
public TextView age; public TextView education;
public ViewHolder(View itemView) {
super(itemView);
this.imageView = (ImageView) itemView.findViewById(R.id.myImg);
this.name = (TextView) itemView.findViewById(R.id.name);
this.age=(TextView) itemView.findViewById(R.id.age);
this.education=(TextView) itemView.findViewById(R.id.education);
}
}
}
Mumbai_Male.Java
package com.maheshwaghela.mahesh.rukhivivah;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
public class MumbaiMale extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mumbai_male);
IconData[] data = new IconData[] {
new IconData("Name:- Mahesh K. Waghela","Age:-45","Education:-B.com", R.drawable.dilip333),
new IconData ("Name:- Sunil K. Waghela","Age:-33","Education:-S.S.C.",R.drawable.hiteshhh)
};
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
CustomAdapter adapter=new CustomAdapter(data);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(adapter);
}
public class IconData {
private String pname;
private String page;
private String pedu;
private int imgId;
public IconData(String name, String age, String edu, int imgId) {
this.pname = name;
this.page= age;
this.pedu= edu;
this.imgId = imgId;
}
public String getPname()
{
return pname;
}
public void setPname(String name)
{
this.pname = name;
}
public String getPage()
{
return page;
}
public void setPage(String age)
{
this.page=age;
}
public String getPedu()
{
return pedu;
}
public void setMyPedu(String edu)
{
this.pedu=edu;
}
public int getImgId()
{
return imgId;
}
public void setImgId(int imgId)
{
this.imgId = imgId;
}
}
}
Where I am wrong don't know but it shows single records instead of two records.

As per your current code, your RecyclerView will display both record for both wrap_content and match_parent. You can see second record if you will scroll your list.
Also You are getting this type of wired output because your are using the same layout as a Activity Layout and Adapter's item layout. So adapter will bind image, name etc.. but it will also display a blank RecyclerView for each row.
So the solution is just keep your RecyclerView inside activity_mumbai_male.xml and create new xml file for your RecyclerView item and inflate that layout xml file inside your adapter. Your issue will be fixed.
Please check below corrected code.
activity_mumbai_male.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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=".MumbaiMale">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
android:scrollbars="vertical" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
item_list.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">
<ImageView
android:id="#+id/myImg"
android:layout_width="90dp"
android:layout_height="90dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="20dp"
android:orientation="vertical">
<TextView
android:id="#+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/age"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/education"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
Replace your code with my below code in CustomAdapter.xml
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View listItem = layoutInflater.inflate(R.layout.item_list, parent, false);
ViewHolder viewHolder = new ViewHolder(listItem);
return viewHolder;
}

You are using RecyclerView, but I could not found your xml regarding Row, you have set text to the Simple Single TextView Which you have provide in your activity_mumbai.xml, To you recyclerview you need to create another xml, which is counted as a row, means single item of your RecyclerView, and Print your xml data in that view.
row_item_view.xml
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/myImg"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginTop="20dp"
android:layout_marginLeft="10dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/name"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/age"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/education"/>
</LinearLayout>
</LinearLayout>
and Change SetContentView in your custom adapter with this new xml.
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View listItem= layoutInflater.inflate(R.layout.row_item_view, parent, false);
ViewHolder viewHolder = new ViewHolder(listItem);
return viewHolder;
}
This will fix your problem.

GridView item looks not as expected - Android

I try to use a GridView object in a specific fragment in my app.
I created a layout file for the grid item and in the layout editor, the preview image looks good, as expected.
The problem arises when I run the app in my emulator. The whole item layout gets shrinked and the image I put in the middle suddenly jumps to the top of the layout.
Screenshot of the layout editor:
https://i.gyazo.com/8ed96ed19719a578388cc48aba6829f8.png
Screenshot of the emulator:
https://i.gyazo.com/cca0a32b3d102025df5d5369dc7c0efc.png
Here is the xml code for the fragment:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<GridView
android:id="#+id/documents_grid"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:columnWidth="#dimen/document_grid_item_width"
android:gravity="center"
android:horizontalSpacing="0dp"
android:verticalSpacing="0dp"
android:numColumns="auto_fit"
android:stretchMode="spacingWidthUniform" />
<RelativeLayout
android:id="#+id/empty_view_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/empty_view_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:src="#drawable/recent_empty_view" />
<ImageView
android:id="#+id/empty_view_arrow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignEnd="#+id/empty_view_image"
android:layout_below="#+id/empty_view_image"
android:layout_marginEnd="7dp"
android:scaleX="0.75"
android:scaleY="0.75"
android:src="#drawable/empty_view_arrow" />
</RelativeLayout>
</RelativeLayout>
Here is the item layout xml code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="#dimen/document_grid_item_width"
android:layout_height="#dimen/document_grid_item_height"
android:gravity="center"
android:orientation="vertical"
android:weightSum="1">
<FrameLayout
android:id="#+id/draft_frame"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.9"
android:background="#drawable/document_grid_item_bg"
android:focusable="true"
android:foreground="?android:selectableItemBackground">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/draft_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="#drawable/draft_icon" />
<ImageView
android:id="#+id/draft_more_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentTop="true"
android:layout_marginTop="5dp"
app:srcCompat="#drawable/ic_more" />
</RelativeLayout>
</FrameLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="5dp"
android:layout_weight="0.1">
<TextView
android:id="#+id/draft_date_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="20 May 17"
android:textSize="11sp" />
</RelativeLayout>
</LinearLayout>
Here is the adapter code:
package com.silverfix.dgdeditor.adapters;
import android.app.Activity;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.silverfix.dgdeditor.R;
import com.silverfix.dgdeditor.utils.DocumentPack;
import com.silverfix.dgdeditor.utils.views.ViewClickListener;
import com.silverfix.dgdeditor.utils.views.ViewLongClickListener;
import java.util.List;
/**
* Created by David on 14/05/2017.
*/
public class DraftsGridAdapter extends BaseAdapter {
// Listeners
private ViewClickListener clickListener;
private ViewLongClickListener longClickListener;
private Activity context;
private List<DocumentPack> dataSet;
private int clickedItemPos = -1;
public DraftsGridAdapter(Activity context, List<DocumentPack> dataSet) {
this.context = context;
this.dataSet = dataSet;
}
public void setClickedItemPosition(int clickedItemPos) {
this.clickedItemPos = clickedItemPos;
}
public int getClickedItemPosition() {
return clickedItemPos;
}
public void setClickListener(ViewClickListener clickListener) {
this.clickListener = clickListener;
}
public void setLongClickListener(ViewLongClickListener longClickListener) {
this.longClickListener = longClickListener;
}
#Override
public int getCount() {
return dataSet.size();
}
#Override
public Object getItem(int position) {
return dataSet.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final DocumentPack pack = dataSet.get(position);
if (convertView == null) {
final LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.draft_grid_item, null);
DraftViewHolder viewHolder = new DraftViewHolder(context, convertView);
convertView.setTag(viewHolder);
}
// Instance of a view holder from the tag of the convertView
DraftViewHolder viewHolder = (DraftViewHolder) convertView.getTag();
// Set the adapter position to the current view holder
viewHolder.setAdapterPosition(position);
// Bind the click listeners to the root view of the view holder
// viewHolder.bindClick(clickListener);
// viewHolder.bindLongClick(longClickListener);
// Bind the data to the view holder
viewHolder.bindData(pack);
return convertView;
}
private class DraftViewHolder implements View.OnCreateContextMenuListener {
private View.OnClickListener clickListener;
private View.OnLongClickListener onLongClickListener;
private View rootView;
private ImageView moreButton;
private TextView date;
private int position;
public DraftViewHolder(final Activity context, final View rootView) {
this.rootView = rootView;
date = (TextView) rootView.findViewById(R.id.draft_date_tv);
moreButton = (ImageView) rootView.findViewById(R.id.draft_more_button);
context.registerForContextMenu(rootView);
rootView.setOnCreateContextMenuListener(this);
moreButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
context.openContextMenu(rootView);
setClickedItemPosition(position);
}
});
}
void setAdapterPosition(int position) {
this.position = position;
}
void bindClick(final ViewClickListener clickListener) {
this.clickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
clickListener.onClick(position);
}
};
rootView.setOnClickListener(this.clickListener);
}
void bindLongClick(final ViewLongClickListener longClickListener) {
this.onLongClickListener = new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
longClickListener.onLongClick(position);
return false;
}
};
rootView.setOnLongClickListener(this.onLongClickListener);
}
void bindData(DocumentPack draft) {
String formatDate = draft.getFormattedDate();
date.setText(formatDate);
}
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
}
}
}

This worked for me, You can try...
`<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:padding="5dp" >
<GridView
android:id="#+id/gridview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="100dp"
android:gravity="center"
android:horizontalSpacing="10dp"
android:numColumns="3"
android:stretchMode="spacingWidthUniform"
android:verticalSpacing="10dp" />
`
If this don't work you can also try to use android:stretchMode="columnWidth"

Scrolling RecyclerView inside CardView is very slow

I have 4 CardViews in a Activity and each CardView has a RecyclerView. Each RecyclerView has around 8-10 rows/item. Scrolling of this page/activity is very slow.
I suspect some problem in my RecyclerView.Adapter class.
Can somebody please let me know what could be the issue in my code?
Adapter:
import android.support.v7.widget.RecyclerView;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
public class JyotishAppAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<DataModel> dataList;
private int cardView;
public static final int CARD_2_COL = 0;
public static final int CARD_3_COL_HEAD = 1;
public static final int CARD_2_COL2 = 2;
public static class GenericViewHolder extends RecyclerView.ViewHolder {
TextView itemName;
TextView itemDescription;
public GenericViewHolder (View itemView) {
super (itemView);
this.itemName = (TextView) itemView.findViewById(R.id.item_name);
this.itemDescription = (TextView) itemView.findViewById(R.id.item_description);
}
}
public static class GenericViewHolder2 extends RecyclerView.ViewHolder {
TextView itemName;
TextView itemDescription;
TextView itemStatus;
public GenericViewHolder2 (View itemView) {
super (itemView);
this.itemName = (TextView) itemView.findViewById(R.id.item_name);
this.itemDescription = (TextView) itemView.findViewById(R.id.item_description);
this.itemStatus = (TextView) itemView.findViewById(R.id.item_status);
}
}
public JyotishAppAdapter(ArrayList<DataModel> dataList, int cardView) {
this.dataList = dataList;
this.cardView = cardView;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View v;
if (cardView == CARD_2_COL) {
v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.list_item, viewGroup, false);
return new GenericViewHolder(v);
} else if (cardView == CARD_2_COL2) {
v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.list_item3, viewGroup, false);
return new GenericViewHolder(v);
} else {
v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.list_item2, viewGroup, false);
return new GenericViewHolder2(v);
}
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, final int position) {
final DataModel dataModel = dataList.get(position);
if (viewHolder instanceof GenericViewHolder) {
GenericViewHolder holder = (GenericViewHolder) viewHolder;
holder.itemName.setText(Html.fromHtml(dataModel.getValue1()));
holder.itemDescription.setText(Html.fromHtml(dataModel.getValue2()));
if (dataModel.getValue4() != null) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Utility.showAlertMessage(view.getContext(), R.string.message_title,
Html.fromHtml(dataModel.getValue4()).toString());
}
});
}
} else {
GenericViewHolder2 holder = (GenericViewHolder2) viewHolder;
holder.itemName.setText(Html.fromHtml(dataModel.getValue1()));
holder.itemDescription.setText(Html.fromHtml(dataModel.getValue2()));
holder.itemStatus.setText(Html.fromHtml(dataModel.getValue3()));
if (dataModel.getValue4() != null) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Utility.showAlertMessage(view.getContext(), R.string.message_title,
Html.fromHtml(dataModel.getValue4()).toString());
}
});
}
}
}
#Override
public int getItemCount() {
return dataList.size();
}
}
Activity.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"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/PageContentBackground"
tools:context=".PanchangaActivity">
<include android:id="#+id/tool_bar"
layout="#layout/tool_bar" />
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/tool_bar"
android:orientation="vertical"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
android:background="#color/PageContentBackground">
<TextView android:id="#+id/muhurta_zone"
style="#style/TextStyle"
android:textSize="#dimen/text_size_horo_data"
android:ellipsize="none"
android:scrollHorizontally="false"
android:layout_marginBottom="5dp"/>
<TextView android:id="#+id/muhurta_place"
style="#style/TextStyle"
android:textSize="#dimen/text_size_horo_data"
android:ellipsize="none"
android:scrollHorizontally="false"
android:layout_marginBottom="10dp"/>
<ScrollView android:layout_height="wrap_content"
android:layout_width="match_parent">
<RelativeLayout android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:id="#+id/cardview4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
card_view:cardElevation="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true"
card_view:cardBackgroundColor="#color/CardViewColor">
<android.support.v7.widget.RecyclerView
android:id="#+id/panchanga_result_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/CardViewColor"
android:paddingLeft="3dp"
android:paddingRight="3dp" />
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:id="#+id/cardview5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/cardview4"
android:layout_marginTop="10dp"
card_view:cardElevation="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true"
card_view:cardBackgroundColor="#color/CardViewColor">
<android.support.v7.widget.RecyclerView
android:id="#+id/panchanga_result_2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/CardViewColor"
android:paddingLeft="3dp"
android:paddingRight="3dp" />
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:id="#+id/cardview6"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/cardview5"
android:layout_marginTop="10dp"
card_view:cardElevation="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true"
card_view:cardBackgroundColor="#color/CardViewColor">
<android.support.v7.widget.RecyclerView
android:id="#+id/panchanga_result_3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/CardViewColor"
android:paddingLeft="3dp"
android:paddingRight="3dp" />
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:id="#+id/cardview7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/cardview6"
android:layout_marginTop="10dp"
card_view:cardElevation="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true"
card_view:cardBackgroundColor="#color/CardViewColor">
<android.support.v7.widget.RecyclerView
android:id="#+id/panchanga_result_4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/CardViewColor"
android:paddingLeft="3dp"
android:paddingRight="3dp" />
</android.support.v7.widget.CardView>
</RelativeLayout>
</ScrollView>
</LinearLayout>
</RelativeLayout>

The problem is solved by setting setNestedScrollingEnabled to false.
recyclerView1.setNestedScrollingEnabled(false);
It is better to use NestedScrollView and set setNestedScrollingEnabled to false for better performance.

Gap between CardViews increases on scrolling

I'm using CarViews with RecyclerView and it looks fine when loaded but once when the list is scrolled the gap between the CardViews increases and there shows only one card in the view at a time.
Here is my CardView.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.v7.widget.CardView
android:id="#+id/conversationCard"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp">
<TextView
android:id="#+id/sender"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/abstractConvo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="35dp"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
and here is how I'm using that view
public class ConversationsListAdapter extends RecyclerView.Adapter<ConversationsListAdapter.ConversationsListViewHolder> {
List<Conversation> conversationList;
public ConversationsListAdapter(List<Conversation> conversationList) {
this.conversationList = conversationList;
}
#Override
public int getItemCount() {
return conversationList.size();
}
#Override
public ConversationsListViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.conversation_card, viewGroup, false);
ConversationsListViewHolder listViewHolder = new ConversationsListViewHolder(view);
return listViewHolder;
}
#Override
public void onBindViewHolder(ConversationsListViewHolder holder, int position) {
holder.sender.setText(conversationList.get(position).getSenderPhNo());
holder.abstractConvo.setText(conversationList.get(position).getAbstractConvo());
}
public static class ConversationsListViewHolder extends RecyclerView.ViewHolder {
CardView cv;
TextView abstractConvo, sender;
public ConversationsListViewHolder(View itemView) {
super(itemView);
cv = (CardView) itemView.findViewById(R.id.conversationCard);
sender = (TextView) itemView.findViewById(R.id.sender);
abstractConvo = (TextView) itemView.findViewById(R.id.abstractConvo);
}
}
}
Here is the screenshot before the list is scrolled
and after scrolling
Thanks in advance.

the root layout use wrap_content
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto">

I tries to implement recycler view with multiple view but I am not getting the desired result

Check out my code:
import android.content.Context;
import android.content.Intent;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import org.w3c.dom.ls.LSException;
import java.util.ArrayList;
import java.util.Arrays;
/**
* Created by Ankit on 3/25/2016.
*/
public class CustomAdapterRecyclerView extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
Context context;
private ArrayList<String> questionsList;
LayoutInflater layoutInflater;
public CustomAdapterRecyclerView(Context context, ArrayList<String> questionsList) {
this.context = context;
this.questionsList = questionsList;
layoutInflater = LayoutInflater.from(context);
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case 1:
final View view = layoutInflater.inflate(R.layout.recycler_view_list, parent, false);
MyViewHolder myViewHolder = new MyViewHolder(view, context);
return myViewHolder;
default:
final View view1 = layoutInflater.inflate(R.layout.single_item_in_list, parent, false);
MyExpandedViewHolder myExpandedViewHolder= new MyExpandedViewHolder(view1, context,new ArrayList<String>(Arrays.asList("A","Aa")));
return myExpandedViewHolder;
}
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
switch (holder.getItemViewType())
{
case 1:
MyViewHolder vh = (MyViewHolder) holder;
vh.questionTitle.setText(questionsList.get(position));
break;
default:
MyExpandedViewHolder viewHolder= (MyExpandedViewHolder) holder;
viewHolder.getListView();
}
}
/*
#Override
public void onBindViewHolder(RecyclerView.V holder, int position) {
holder.questionTitle.setText(questionsList.get(position));
}*/
#Override
public int getItemCount() {
return questionsList.size();
}
#Override
public int getItemViewType(int position) {
if(position ==0|| position==1|| position==2)
{
return 0;
}
else
return 1;
}
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView questionTitle;
private Context context;
public MyViewHolder(final View itemView, Context context) {
super(itemView);
this.context = context;
itemView.setOnClickListener(this);
questionTitle = (TextView) itemView.findViewById(R.id.question);
questionTitle.setOnClickListener(this);
}
#Override
public void onClick(View v) {
Toast.makeText(context, "" + getAdapterPosition() + questionTitle.getText().toString(), Toast.LENGTH_LONG).show();
Log.d("TAG", "" + getAdapterPosition());
Intent intent = new Intent(context, ProgramViewer.class);
intent.putExtra("titlePos",getAdapterPosition());
intent.putExtra("title",questionTitle.getText().toString());
context.startActivity(intent);
}
}
public class MyExpandedViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
{
private Context context;
ListView listView;
public MyExpandedViewHolder(View itemView, Context context,ArrayList<String> mobileArray) {
super(itemView);
this.context = context;
ArrayAdapter adapter = new ArrayAdapter<String>(context, R.layout.expanded_list_inside_recycler_view, mobileArray);
listView= (ListView) itemView.findViewById(R.id.list_view);
listView.setAdapter(adapter);
}
public ListView getListView()
{
return this.listView;
}
#Override
public void onClick(View v) {
Toast.makeText(context,getAdapterPosition()+"",Toast.LENGTH_LONG).show();
}
}
}
What I tried to do is to expand the RecyclerView item on click but first I have to implement recycler view and list view together. I am getting NullPointerException. Please tell me the problem in my code. The answer would be greatly appreciated.
Log file:
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference
at kole.technicalbird.CustomAdapterRecyclerView$MyExpandedViewHolder.<init>(CustomAdapterRecyclerView.java:113)
at kole.technicalbird.CustomAdapterRecyclerView.onCreateViewHolder(CustomAdapterRecyclerView.java:43)
at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:5476)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4701)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(
Layout File: single_item_in_list.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">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:text="a"/>
</LinearLayout>
**recycler_view_list**
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:elevation="8dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/question"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:fontFamily="sans-serif"
android:text="ques"
android:padding="8dp"
android:layout_marginRight="32dp"
android:textSize="16dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="8dp"
android:fontFamily="sans-serif"
android:layout_centerVertical="true"
android:padding="8dp"
android:text=">" />
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
<ImageView
android:src="#android:drawable/divider_horizontal_dark"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="fitXY"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingBottom="0.2dp"
android:paddingTop="0.2dp" />
</LinearLayout>
<?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">
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/list_view">
</ListView>
</LinearLayout>
expanded_list_inside_recycler_view
<?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">
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/list_view">
</ListView>
</LinearLayout>

Where is your listview in your single_item_in_list.xml.
Your single_item_in_list.xml don't have listview,so when you use getListView() ,the listview is null.I guess this is the reason!