Develop Reference

How to center an ImageView on the edge of a cardView?

I have a layout like this:
My xml for that layout:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
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:fillViewport="true"
tools:context=".view.testviews.ProfileFragment"
android:background="#color/colorDarkGrey">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_marginStart="20dp"
android:layout_marginTop="100dp"
android:layout_marginEnd="20dp"
app:cardCornerRadius="16dp">
<FrameLayout
android:layout_gravity="center_horizontal"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginTop="-50dp">
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/profile_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:src="#drawable/user_image_placeholder"
app:civ_border_color="#FF000000"
app:civ_border_width="2dp">
</de.hdodenhof.circleimageview.CircleImageView>
</FrameLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
I'm trying to center the circleImageView on the edge of the cardView. But the top part of it is invisible. I looked up for similar questions, but they couldn't meet my requirements. How can I achieve this?
So I tried #PPartisan's solution, and it made it like this:
The code for that :
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
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:fillViewport="true"
tools:context=".view.testviews.ProfileFragment"
android:background="#color/colorDarkGrey">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.cardview.widget.CardView
android:id="#+id/cardView2"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_marginStart="20dp"
android:layout_marginTop="150dp"
android:layout_marginEnd="20dp"
app:cardCornerRadius="16dp">
</androidx.cardview.widget.CardView>
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/profile_image"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="90dp"
android:src="#drawable/user_image_placeholder"
app:civ_border_color="#FF000000"
app:civ_border_width="2dp"
>
</de.hdodenhof.circleimageview.CircleImageView>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

Don't make your ImageView a child of the CardView, as it will be clipped by its parent. Also, when considering XML, the drawing order is specified from top to bottom, which means that Views specified later in the XML will be drawn over any views that are specified earlier. This mean you should draw your CardView first, and then your CircleImageView. Your layout structure should therefore be:
<CardView.../>
<...CircleImageView.../>
I would also recommend you use CoordinatorLayout as it will be simpler to use features like guidelines to correctly align your various views.
Edit: Thankyou Adinia for pointing out in the comments that it is also necessary to set an elevation on the image to ensure it draws on top.

android:layout_gravity="center"
So your layout becomes:
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:cardCornerRadius="80dp"
app:cardElevation="10dp"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="#drawable/titelbild280x280"
/>
</android.support.v7.widget.CardView>

Is it Possible to remove child padding In Android

I have a linear layout. In Parent's view, I have padding defined. But I want to remove the padding from the child view. Is it possible to remove middle child view padding?. I know one solution is that I need to give padding separately. But i don't want to use this solution. So any alternative solution.
Layout
<?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"
xmlns:tool="http://schemas.android.com/tools"
android:padding="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:visibility="gone"
tool:text="Header text" />
<View
android:id="#+id/separator"
android:layout_width="match_parent"
android:layout_height="2dp"
android:layout_marginTop="10dp"
android:background="#cccccc"
android:visibility="gone"
app:layout_constraintTop_toBottomOf="#id/header" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/dialog_recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="5dp" />
</LinearLayout>
Above code looks like this
Expected Output

This could be done adding in the LinearLayout
android:clipToPadding="false"
and setting negative horizontal margins in the View:
android:layout_marginStart="-16dp"
android:layout_marginEnd="-16dp"
This works because you have a LinearLayout, it seems that negative margins are not supported for other ViewGroups than LinearLayout and RelativeLayout as this answer says: https://stackoverflow.com/a/10673572/7794806

FrameLayout with layout_weight is considered useless

Consider the following layout:
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/black"
>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
/>
<TextView
android:id="#+id/primary_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textColor="#color/white"
android:textSize="24sp"
tools:text="Primary!"
/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
/>
<TextView
android:id="#+id/secondary_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textColor="#color/white"
android:textSize="24sp"
tools:text="Secondary!"
/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="3"
/>
</LinearLayout>
See the screenshot below for the result. The layout works fine, but Android Studio warns me that the FrameLayouts are considered useless and should be removed. However, they're not useless. I use layout_weight here. The idea is that the space between and around the two TextViews are relative with weights 2:1:3.
How can I rewrite my layout that results in the same weighted positioning of the views without having to use empty FrameLayouts?

You can get rid of the first two FrameLayout by setting the height of your TextView to 0dp and their weight to the values you set for your FrameLayout.

FrameLayout is a container that is supposed to have children. For a gap, a View is sufficient. I replaced each empty FrameLayouts with:
<View
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
/>
and the linter warning was gone.

Android Layouts: Stick one Layout to the top of the screen and place another Layout centred below

I am working on my first android-project, a memory-game in Android Studio. The gameActivity-Frame should contain some textViews, displayed in one line (for stats) on the top of the screen and the memory-cards below. There are mutliple memory-versions, so the number of memory-cards vary - and by that the dimension of thier GridLayout.
My main Layout is a LinearLayout (vertical). I placed another LinearLayout (horizontal) on it, where the Textviews take place. To display the cards, I used a GridLayout which will be filled with cards once the game started.
The LinearLayout (with textViews) should always stick on the top of the screen. The GridLayout should be centered in the remaining space below.
What I get is that both Layouts either stick in the middle, or that the LinearLayout is correct, but the GridLayout is either on the bottom or on the top of the remaining space.
I tried to find a solution here on SO, and I think I tried every possible combination of the gravity- and layout_gravity - settings of the components. I can imagine the problem is that I can use either wrap_content or match_parent in the main Layout, but not both. Guess I'd need wrap_content to stick the first Layout to the top and match_parent to use the whole space below this Layout.
How can I stick the first Layout to the top and center the GridLayout in the remaining space?
The picture shows my current layout (see code below) and how I want it to look.
center_GridLayout
Edit to clarify:
The LinearLayout should stick to the top of the screen, the GridLayout should be
centered in the remaining space below the LinearLayout.
RelativeLayout won't do the job properly, because the layouts might overlap, depending on the amount of memory-cards and the user's device's dimensions.
I uploaded another screenshot where it's better visible what I want to achieve:
This is my .xml (deleted some unimportant textViews):
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/MemoryLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp"
android:layout_weight="1"
android:orientation="horizontal">
<TextView
android:id="#+id/textStatsPairs"
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/textStatsPairs" />
</LinearLayout>
<GridLayout
android:id="#+id/gridLayoutMainActivityTEST"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:columnCount="4"
android:foregroundGravity="center"
android:orientation="horizontal"
android:rowCount="4"
android:textAlignment="center"
android:useDefaultMargins="true"
tools:context=".GameActivity" />
</LinearLayout>

use relative layout or constraint layout.
<?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:id="#+id/MemoryLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<LinearLayout
android:layout_alignParentTop="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp"
android:layout_weight="1"
android:orientation="horizontal">
<TextView
android:id="#+id/textStatsPairs"
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/textStatsPairs" />
</LinearLayout>
<GridLayout
android:layout_centerInParent="true"
android:id="#+id/gridLayoutMainActivityTEST"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:columnCount="4"
android:foregroundGravity="center"
android:orientation="horizontal"
android:rowCount="4"
android:textAlignment="center"
android:useDefaultMargins="true"
tools:context=".GameActivity" />
</RelativeLayout >

You can use relative layout along with linearlayout.From your question i got that you want your linearlayout always stick to top and GridLayout always stick to center.If this is the case then i think following code snippet will help you.
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<GridLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true">
</GridLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_alignParentTop="true">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Texts Here"
android:layout_gravity="center"
android:gravity="center"/>
</LinearLayout>
</RelativeLayout>

The ConstraintLayout was what fixed my problem... Here's the solution that finally works perfectly:
<?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:id="#+id/memory_activity_4x4"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/linearLayout_4x4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_gravity="center"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp"
android:layout_weight="1"
android:orientation="horizontal">
<TextView
android:id="#+id/textStatsPairs"
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/textStatsPairs" />
</LinearLayout>
<GridLayout
android:id="#+id/gridLayout4x4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:columnCount="4"
android:foregroundGravity="center"
android:orientation="horizontal"
android:rowCount="4"
android:textAlignment="center"
android:useDefaultMargins="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout_4x4"
tools:context=".GameActivity" />
</androidx.constraintlayout.widget.ConstraintLayout>

First view in RelativeLayout expand to fill remaining space

I am working on a layout with a cardview, a checkbox and a button with the initial structure as shown in the first image:
In this case the listview is not shown until the user clicks an image inside the cardview, so when this happens the dessired structure is like
the second image
However as the listview is actually inside a fragment I can't achieve the dessired layout because wrap_content and match_parent for the cardview gives me the next result
And as you can see the cardview overlaps the button and the checkbox goes beyond the screen
Right now this is my layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white">
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/card"
android:layout_marginTop="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_alignParentTop="true"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
>
<ImageButton
android:layout_width="#dimen/event_invitation_expand_icon"
android:layout_height="#dimen/event_invitation_expand_icon"
android:id="#+id/shrink"
android:src="#drawable/ic_shrink"
android:background="#android:color/transparent"
android:scaleType="fitCenter"
android:layout_gravity="center_vertical"
android:layout_marginRight="5dp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/shrink"
android:layout_marginTop="5dp"
android:id="#+id/list">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:name="ListFragment"
tools:layout="#layout/fragment_list"/>
</RelativeLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/checkBox"
android:layout_marginTop="20dp"
android:layout_below="#+id/card"/>
<Space
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/button"
android:layout_below="#+id/checkBox"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/button"
android:layout_alignParentBottom="true"
style="#android:style/Widget.DeviceDefault.Button.Borderless"
/>
I hope you can help me to set the max height of the card view to stop growing when the space is filled.
I have also tried to set the checkbox always at top of the bottom and the cardview to fill the remaining space and although it gives me the correct structure when the listview is expanded, it doesn't work for the list hidden since the cardview fills the space with nothing.
Update
As suggested I have tried changing the root layout to LinearLayout using weight, however, I got the same result as before and if I change the weight of the cardview to 1 and the checkbox to 0 I am able to get the desired layout for the expanded list but not for the hidden case.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white"
android:orientation="vertical">
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/card"
android:layout_marginTop="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_weight="0">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp"
>
<ImageButton
android:layout_width="#dimen/event_invitation_expand_icon"
android:layout_height="#dimen/event_invitation_expand_icon"
android:id="#+id/shrink"
android:src="#drawable/ic_shrink"
android:background="#android:color/transparent"
android:scaleType="fitCenter"
android:layout_gravity="center_vertical"
android:layout_marginRight="5dp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/shrink"
android:layout_marginTop="5dp"
android:id="#+id/list">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:name="ListFragment"
tools:layout="#layout/fragment_list"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/check"
android:id="#+id/check"
android:layout_marginTop="20dp"
android:layout_below="#+id/card"
/>
</LinearLayout>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/button"
android:textStyle="bold"
android:textColor="#android:color/white"
/>

You'll need to use a LinearLayout and use Weight for the childs.
You can change all views weight on click.
But I think you'll need to put your CheckBox inside a layout and set this layout weight. Otherwise you'll mess with the height.
Didn't look to close to your layout, but you may need to do that for CardView too.
Just keep that in mind.
Hope this helps

To do what you are trying to do, you would have better luck using a LinearLayout with vertical orientation as your root element. Doing this, you could set the CardView to have a weight of 1 (and a 'height' of 0dp, because of how weight works) without giving a weight to the other elements, causing it to fill all available space not taken by the other two elements. The method for doing this can be found here:
http://developer.android.com/guide/topics/ui/layout/linear.html#Weight