Develop Reference

How to make RecyclerView item layout with different size with StaggerGridLayout?

I have a recyclerView where I need to show only images from API with pagination(Paging3 library). I have to show the image with StaggeredGridLayout.I specify the span count 3 and the item layout width, and height to wrap content. But it wasn't working. I want a second item layout whichh is double size. I have attached a snap that I want as my layout. Please help me, I am stuck.
What I want
This is the screenshot I want to make
RecylerView
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/searchHomeImageRv"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="7dp"
android:orientation="vertical"
app:layoutManager="androidx.recyclerview.widget.StaggeredGridLayoutManager"
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/appBarLayout2"
app:spanCount="3"
tools:listitem="#layout/row_image" />
Item CardLayout
<com.google.android.material.card.MaterialCardView 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"
android:layout_margin="2dp"
android:clickable="true"
android:focusable="true"
app:cardCornerRadius="5dp"
app:cardElevation="5dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:rippleColor="#color/black500">
<ImageView
android:id="#+id/img"
android:layout_width="match_parent"
android:layout_height="200dp"
android:scaleType="centerCrop"
android:src="#drawable/attention" />
</com.google.android.material.card.MaterialCardView>

Button not visible in AVD

Making an app. Last 2 button are visible in preview mode , but not in AVD(Google pixel 3a). Actually I'm new to Android. I just directly pasted the code if need more information let me know. Thank you
Snippet of code
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/courses_offered"
android:layout_marginTop="470dp"
android:layout_marginBottom="140dp"
android:layout_marginRight="30dp"
android:layout_marginLeft="230dp"
android:textColor="#color/white"
android:backgroundTint="#color/orange"
/>
<Button
android:id="#+id/Fee_structure"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/fee_structure"
android:layout_marginTop="470dp"
android:layout_marginBottom="140dp"
android:layout_marginRight="230dp"
android:layout_marginLeft="30dp"
android:textColor="#color/white"
android:backgroundTint="#color/orange"
/>
</androidx.constraintlayout.widget.ConstraintLayout>

You're using ConstraintLayout but your buttons doesn't have any constraint to initialize where they should be
For example:
adding app:layout_constraintBottom_toBottomOf="parent" will position the bottom of the button to the bottom of parent, in this case, your layout
See this for further details and examples: https://developer.android.com/reference/androidx/constraintlayout/widget/ConstraintLayout?authuser=1

You have to use constraints in the Constraint layout just like
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
enter link description here
Try this code it will show you in AVD.
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:backgroundTint="#color/teal_200"
android:text="asd"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.8"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.8" />
<Button
android:id="#+id/Fee_structure"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:backgroundTint="#color/teal_200"
android:text="asd"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintHorizontal_bias="0.2"
app:layout_constraintVertical_bias="0.8" />
</androidx.constraintlayout.widget.ConstraintLayout>

You have given height and width to match parent so your first button is taking all the space available in screen so you have to make them wrap content (height) and then constraint them accordingly

RecyclerView pushes its below button out of the screen in ConstraintLayout

I am attempting to set up a layout with an "X" button pinned to the top of the screen, and then two elements centered in the view. One a recycler view and then, pinned below the recycler view, a button for form submission. The layout I currently have worked until the recycler view outgrows its bounds. Then the submission button is pushed below the bounds of the view and the recycler view does not stay within the layout. How can I center the two recycler and button views but not have the button go past view bounds if the recycler view grows large?
View With Small Recycler View Appears As (it should be centered. my example is slightly off.)
How View Should Appear with Larger Recycler View (the recycler view's content is too large to fit so it scrolls)
How View Actually Appears with Larger Recycler View (the recycler view does scroll, but now it pushes the button off the bottom of the view, which appears as the button being cut off)
Relevant Code Block for XML Layout
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.45"
android:orientation="vertical"
android:background="#color/backgroundLightSecondary"
android:padding="20dp" >
<Button
android:id="#+id/bt_close"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_gravity="end"
android:background="#drawable/ic_close"
android:textColor="#color/textLightPrimary" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:layout_weight="1"
android:gravity="center_vertical">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv_item_options"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<Button
android:id="#+id/bt_order"
android:layout_width="150dp"
android:layout_height="50dp"
android:layout_weight="0"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:background="#drawable/bt_rounded_corner"
android:fontFamily="#font/microbrew_two"
android:padding="3dp"
android:text="#string/btn_add_to_order"
android:textColor="#color/backgroundLightSecondary"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>

In such cases, the best way is to use a ConstraintLayout as the container. As you mentioned in the question, you want to lay the RecyclerView at the center. So, it leads to binding its top and bottom to the buttons.
On the other hand, if we make a chain between the RecyclerView and submitButton with a vertical chain style of packed, the submitButton would stick to the bottom of RecyclerView (which height is wrap_content to be able to grow) and moves with its bottom until it reaches the bottom of the screen (because of app:layout_constraintBottom_toBottomOf="parent").
The key point is to set app:layout_constrainedHeight="true" for the RecyclerView leading to not overlap with the two buttons.
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
android:padding="8dp" >
<androidx.appcompat.widget.AppCompatImageButton
android:id="#+id/closeImageButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_baseline_close_24"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constrainedHeight="true"
app:layout_constraintBottom_toTopOf="#id/submitButton"
app:layout_constraintTop_toBottomOf="#id/closeImageButton"
app:layout_constraintVertical_chainStyle="packed" />
<androidx.appcompat.widget.AppCompatButton
android:id="#+id/submitButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Submit"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/recyclerView" />
</androidx.constraintlayout.widget.ConstraintLayout>
Visual Result:

As I understand You want a button on top followed by recyclerview and than a Submit button in the end.And if size of recyclerview grows Submit button should not change its place.
Try this I make a rough layout
<LinearLayout //This is root layout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycle"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
Output of code looks like this

You can do everything you want in just one hierarchy by using ConstraintLayout. As an example, I edited your XML code as below;
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="#+id/bt_close"
android:layout_width="40dp"
android:layout_height="40dp"
android:background="#drawable/ic_close"
android:textColor="#android:color/white"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv_item_options"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginTop="30dp"
android:layout_marginBottom="10dp"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintBottom_toTopOf="#+id/bt_order"
app:layout_constraintTop_toBottomOf="#+id/bt_close" />
<Button
android:id="#+id/bt_order"
android:layout_width="150dp"
android:layout_height="50dp"
android:background="#android:color/holo_blue_dark"
android:padding="3dp"
android:text="Button"
android:textColor="#android:color/white"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/rv_item_options" />
</androidx.constraintlayout.widget.ConstraintLayout>

Bottom align not working in ConstraintLayout with different ImageView sizes

I want some different sized ImageViews in ConstraintLayout to have the same bottom line.
The smaller picture has the size: 100x140:
The larger picture has the size: 206x316:
With the xml layout:
<?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="#8E8392">
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:src="#drawable/jbean"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#+id/p2"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p1"/>
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:src="#drawable/jellybig"
app:layout_constraintStart_toEndOf="#id/p1"
app:layout_constraintEnd_toStartOf="#+id/p3"
app:layout_constraintBottom_toBottomOf="#id/p1"
android:id="#+id/p2"
/>
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:src="#drawable/jellybig"
app:layout_constraintStart_toEndOf="#id/p2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="#id/p2"
android:id="#+id/p3"
/>
</android.support.constraint.ConstraintLayout>
However it looks weird, as follows:
Update:
According to Tamir Abutbul's answer, I've updated the layout to:
<?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="200dp"
android:background="#8E8392">
<ImageView
android:layout_width="0dp"
app:layout_constraintWidth_percent="0.3"
app:layout_constraintHeight_percent="0.99"
android:layout_height="0dp"
android:src="#drawable/jbean"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#+id/p2"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p1"/>
<ImageView
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintWidth_percent="0.3"
app:layout_constraintHeight_percent="0.99"
android:src="#drawable/jellybig"
app:layout_constraintStart_toEndOf="#id/p1"
app:layout_constraintEnd_toStartOf="#+id/p3"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p2"
/>
<ImageView
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintWidth_percent="0.3"
app:layout_constraintHeight_percent="0.99"
android:src="#drawable/jellybig"
app:layout_constraintStart_toEndOf="#id/p2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p3"
/>
</android.support.constraint.ConstraintLayout>
Which I think it couldn't work as expected.

hey unable to add this xml as comment, this is the xml for above image
<?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="200dp"
android:background="#ffffff">
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:src="#drawable/small"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#+id/p2"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p1"
app:layout_constraintHorizontal_bias="1"/>
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:src="#drawable/big"
app:layout_constraintStart_toEndOf="#id/p1"
app:layout_constraintEnd_toStartOf="#+id/p3"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p2"
app:layout_constraintHorizontal_bias="1"
/>
<ImageView
android:id="#+id/p3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/big"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintStart_toEndOf="#id/p2" />
</android.support.constraint.ConstraintLayout>

Try below code
<?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="#8E8392">
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:src="#drawable/jbean"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#+id/p2"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p1"/>
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:src="#drawable/jellybig"
app:layout_constraintStart_toEndOf="#id/p1"
app:layout_constraintEnd_toStartOf="#+id/p3"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p2"
/>
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:src="#drawable/jellybig"
app:layout_constraintStart_toEndOf="#id/p2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:id="#+id/p3"
/>
</android.support.constraint.ConstraintLayout>
Let me know if not working

Your code will work for images with the same height and look like this:
But Different phones got different screen size, your images have fixed size and the result is that what may look good on one screen (your android studio preview screen) will not look good on another screen (your actual phone).
In ConstraintLayout you can work with percent on your views like this:
<Button
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHeight_percent="0.6" //line 1
app:layout_constraintWidth_percent="0.5" //line 2
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
So what I did - I told my button to be equal to 60% of its parent in height (see line 1)
and also I told my button to be equal to 50% of its parent Width(see line 2).
You can implement this logic into your imageView to show different image size and keep a responsive layout.

do you want something like this??

I had a similar problem with an imageview that was constrained to the parents bottom but still showed some kind of margin. The solution was to add android:adjustViewBounds="true"

Put a button over an ImageView

I'm newbie in Android.
I would like to know if it's possible to put a button or another component over an ImageView. I've tried setting the image as a background image of a LinearLayout, but when I change between landscape and portrait mode, the image porportions are changed.
Thanks a lot.

Don't put the image as a background, you don't have any control on how the image is scaled. Instead, create a RelativeLayout, and put an ImageView as one of the child, and you can place anything (buttons etc) as other RelativeLayout children.
<RelativeLayout ...>
<ImageView (your image) ...>
<Button (the button you want) ... />
</RelativeLayout>

Try this code... it's Help you....
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/imageviewMain"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="Path "
/>
<Button android:id="#+id/but2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
Try this Code .....
In that give paramater in button to set your Button Position....
android:layout_margin or android:layout_alignParent
And also give Path of Image....

There is another way to do it,http://www.curious-creature.org/2009/03/01/android-layout-tricks-3-optimize-part-1/
Thank you.

The simpliest way to do it is to use a FrameLayout.

This is easy using the ConstraintLayout.
Set the constraints of the Button to the ImageView.
Drag the Button anywhere you want over the ImageView to position it.
XML code will be autogenerated.

For those using Constraint Layout: Just use an ImageView and add its constraints from all the four side to Parent and than add the other views as well.
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
app:cardCornerRadius="10dp"
app:cardElevation="10dp"
app:cardPreventCornerOverlap="true"
app:contentPadding="5dp"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/food"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="#+id/imagebtn_share"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_share_24"
app:layout_constraintTop_toTopOf="parent"
android:padding="15dp"
app:layout_constraintStart_toStartOf="parent" />
<ImageButton
android:id="#+id/imagebtn_call"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_call_24"
android:padding="15dp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<TextView
android:id="#+id/expdate_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/test_date"
android:background="#E2E3E4"
android:layout_marginBottom="10dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toTopOf="#+id/imagebtn_address"
android:layout_marginEnd="30dp"
android:padding="5dp"/>
<TextView
android:id="#+id/title_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="5dp"
android:layout_marginBottom="5dp"
android:background="#E2E3E4"
android:padding="5dp"
android:textSize="18sp"
android:text="#string/test_foodname"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/imagebtn_address"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent" />
<ImageButton
android:id="#+id/imagebtn_address"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_location_on_24"
android:padding="15dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
Note: Replace the drawables added with your own.