Develop Reference

How to center CardView inside LinearLayout?

I have a portrait display and I want to translate it to landscape mode.
In landscape mode, first child of encompassing LinearLayout, which is also a LinearLayout, should contain CardView with ImageView (rounded, I'm not sure how is that gonna turn out). In second LinearLayout, I would like to have Username and Password EditText next to each other horizontally. And finally, the last LinearLayout should contain Login and Sign Up buttons also horizontally.
I don't know how to center CardView inside first child LinearLayout and how to make ImageView rounded.
This what I have:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/gradient"
android:gravity="center"
tools:context=".LoginActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal"
android:layout_weight="1">
<androidx.cardview.widget.CardView
android:id="#+id/imageView"
android:layout_width="150dp"
android:layout_height="match_parent"
app:cardBackgroundColor="#090909"
app:cardCornerRadius="250dp">
<!--<androidx.cardview.widget.CardView
android:layout_width="150dp"
android:layout_height="145dp"
android:gravity="center"
app:cardCornerRadius="250dp">
</androidx.cardview.widget.CardView>-->
</androidx.cardview.widget.CardView>
<!--<ImageView
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:scaleType="centerCrop"
android:src="#drawable/login_logo" />-->
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal">
<!--HERE WILL BE Username and Password-->
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal">
<!--HERE WILL BE Login and Sign up-->
</LinearLayout>
</LinearLayout>

android:gravity handles the alignment of its children,
android:layout_gravity handles the alignment of itself.
If you want to more rounded card view then fix heigh of cardView.
Give weight to other Linear layout "2", and Layout with card view weight "1" for small size.
Thanks You! Happy Coding
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#abcdef"
android:layout_gravity="center"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="horizontal">
<androidx.cardview.widget.CardView
android:id="#+id/imageView"
android:layout_width="150dp"
android:layout_height="match_parent"
app:cardBackgroundColor="#090909"
app:cardCornerRadius="150dp">
<!--<androidx.cardview.widget.CardView
android:layout_width="150dp"
android:layout_height="145dp"
android:gravity="center"
app:cardCornerRadius="250dp">
</androidx.cardview.widget.CardView>-->
</androidx.cardview.widget.CardView>
<!--<ImageView
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:scaleType="centerCrop"
android:src="#drawable/login_logo" />-->
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:orientation="horizontal">
<!--HERE WILL BE Username and Password-->
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:orientation="horizontal">
<!--HERE WILL BE Login and Sign up-->
</LinearLayout>
</LinearLayout>
[This is your project(image) => https://i.stack.imgur.com/68ARf.png ]

your problem is simple. just change your orientation your linear layout like this:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" <!--change this-->
android:layout_weight="1">
<androidx.cardview.widget.CardView
android:id="#+id/imageView"
android:layout_width="150dp"
android:layout_gravity="center" <!-- and this-->
android:layout_height="match_parent"
app:cardBackgroundColor="#090909"
app:cardCornerRadius="250dp">
</androidx.cardview.widget.CardView>
<!--<ImageView
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:scaleType="centerCrop"
android:src="#drawable/login_logo" />-->
</LinearLayout>
after this manipulation your cardview image will be in the center

Put two views in the center of the screen

I have two views (com.github.mikephil.charting.charts.BarChart and LinearLayout), the content inside one view is approx 600 dp high, the other once has 500 dp. Width of both views is fill_parent.
I would like to position them both into the center of the screen (so they overlaps).
Unfortunately, Android's layout alignment is very unintuitive and hit or miss for me and I'm not able to achieve that.
Can you please help?
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical"
android:background="#11FFFFFF">
<com.github.mikephil.charting.charts.BarChart
android:id="#+id/chart"
android:layout_width="match_parent"
android:layout_height="500dp"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:gravity="center">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="50dp"
android:orientation="vertical"
android:gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="150dp"
android:includeFontPadding="false"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="HITS"
android:textAppearance="?android:attr/textAppearanceLarge"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="50dp"
android:orientation="vertical"
android:gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="150dp"
android:includeFontPadding="false"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="MISSED"
android:textAppearance="?android:attr/textAppearanceLarge"/>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
I want to position both Views inside this RelativeLayout in the center of the screen, overlapping

Put in the 2 views you wanna to place in center inside a RelativeLayout, then add android:layout_centerInParent="true" into the 2 views.
For example it look like this:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.github.mikephil.charting.charts.BarChart
....all other stuff
android:layout_centerInParent="true" > //..add this
<LinearLayout
..... all other stuff
android:layout_centerInParent="true" > //..add this
</LinearLayout>
</RelativeLayout>

Define your main layout as ConstraintLayout and then constraint all sides of both elements to their parent.
Something like this:
<?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">
<LinearLayout
android:layout_width="600dp"
android:layout_height="600dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
</LinearLayout>
<com.github.mikephil.charting.charts.BarChart
android:layout_width="500dp"
android:layout_height="500dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
</com.github.mikephil.charting.charts.BarChart>
</android.support.constraint.ConstraintLayout>
With this code your BarChart is above your LinearLayout.

In my experience it's most of the times best practice to use the lightest container possible, which in this case is probably a FrameLayout, so I would use that instead of RelativeLayout and use android:layout_gravity="center" in the subviews like this for example:
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.github.mikephil.charting.charts.BarChart
android:layout_gravity="center" >
<LinearLayout
android:layout_gravity="center" >
</LinearLayout>
</FrameLayout>

Android XML: Vertical Seekbar in Android with match parent layout isn't working properly

I have seen a different post related to this topic already before posting this question so I can definitely say that this question is not a duplicate. I have a different problem which I couldn't fix or find a solution to it.
Problem: I have created a Vertical Seekbar using new <SeekBar> </SeekBar> view. It does look fine when I see the preview in Android Studio but on the device, the SeekBar doesn't fill the height of the screen. I have rotated the SeekBar view with 90deg and try to set the height:match_parent and width:wrap_content but it isn't working at all as I expected. So I set the height to some hard-coded value and it looked fine. The only problem is, I will have to check the height of the view in which it is getting populated and set the height of the SeekBar problematically, which I want to avoid.
slider.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/slider"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/roundcorner"
android:backgroundTint="#color/design_default_color_primary"
android:gravity="center"
android:layout_gravity="center"
android:elevation="5dp"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAlignment="center"
android:textColor="#fff"
android:text="#string/RangeValue"
android:paddingTop="16dp"
android:paddingBottom="16dp"/>
<FrameLayout
android:layout_weight="1"
android:background="#fff"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SeekBar
android:id="#+id/seeker"
android:layout_width="wrap_content" <!-- Set this to 400dp and it looks fine -->
android:layout_height="match_parent"
android:rotation="270"
android:layout_gravity="center"/>
</FrameLayout>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_round_done_24px"
android:layout_gravity="center"
android:padding="16dp" />
</LinearLayout>
Update
Thank you Reaz for your answer
content_main.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"
android:background="#fff"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".MainActivity"
tools:showIn="#layout/app_bar_main">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
layout="#layout/maingrid"
android:background="#color/colorAccent"
android:layout_centerInParent="true"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<LinearLayout
android:background="#android:color/transparent"
android:layout_centerInParent="true"
android:id="#+id/radarCanvas"
android:layout_width="300dp"
android:layout_height="300dp"
android:orientation="vertical">
</LinearLayout>
<include
android:layout_alignParentBottom="true"
layout="#layout/biosignals"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<!--- this is where i am including slider layout -->
<include
android:layout_alignParentRight="true"
layout="#layout/slider"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_margin="24dp" />
</RelativeLayout>
</LinearLayout>
</android.support.constraint.ConstraintLayout>

You are setting weight inside the Framelayout when the orientation is vertical and at the same time the height of FrameLayout is set to match_parent. If you are setting like this there will be no effect of the weight. Try setting the height to 0dp it will work for sure.
<FrameLayout
android:layout_weight="1"
android:background="#fff"
android:layout_width="match_parent"
android:layout_height="0dp">
<SeekBar
android:id="#+id/seeker"
android:layout_width="wrap_content" // set this to 400dp and it looks fine
android:layout_height="match_parent"
android:rotation="270"
android:layout_gravity="center"/>
</FrameLayout>
This is my result

You need to get rid of your FrameLayout which is limiting the width of the SeekBar. I tried to implement the layout like the following and I think it should fit in your case as well.
Another important thing you should notice that, because of your rotation, the width and height are interchanged in the view for your SeekBar. Hence I made the layout_width="match_parent". Hope that helps!
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/slider"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:elevation="5dp">
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="30dp"
android:padding="16dp"
android:text="100"
android:textAlignment="center" />
<SeekBar
android:id="#+id/seeker"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:rotation="270" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="20dp"
android:padding="16dp"
android:src="#android:drawable/star_on" />
</RelativeLayout>
Here is the result that I have got.

<RelativeLayout
android:layout_width="400dp"
android:layout_height="200dp"
android:layout_gravity="center">
<SeekBar
android:layout_width="400dp"
android:layout_height="match_parent"
android:layout_gravity="center"
android:maxHeight="4dp"
android:minHeight="4dp"
android:progress="50"
android:progressDrawable="#drawable/custom_seek_bar"
android:rotation="270"
android:thumb="#drawable/seekbar_thumb" />
</RelativeLayout>
Use this code, you will get desired result

Unable to scroll linear layout inside a horizontal scrollview in android

I am adding few image views inside a horizontal LinearLayout which is again inside a HorizontalScrollView. But the linear layout is not scrolling. Below is my code. Can someone guide me where exactly my xml formation is going wrong?
<?xml version="1.0" encoding="utf-8"?>
<HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="15dp"
android:layout_marginBottom="2dp"
android:fillViewport="true"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/lyt_items"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="#+id/iv_icon1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:contentDescription="#string/app_name"
android:layout_marginRight="1dp"
android:src="#drawable/default_ic" />
<ImageView
android:id="#+id/iv_icon2"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:contentDescription="#string/app_name"
android:layout_marginRight="1dp"
android:src="#drawable/default_ic" />
<ImageView
android:id="#+id/iv_icon3"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:contentDescription="#string/app_name"
android:layout_marginRight="1dp"
android:src="#drawable/default_ic" />
</LinearLayout>
</HorizontalScrollView>

I would suggest use Constraint Layout As Parent and Inside it Use Nested Scroll View With Linear Layout
Here is a sample code, modify according to your need.
<?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="suraj.iitgandhinagar.Login">
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
tools:layout_editor_absoluteX="72dp"
tools:layout_editor_absoluteY="0dp"
tools:ignore="MissingConstraints">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="36dp">
<ImageView
android:id="#+id/imageView4"
android:layout_width="272dp"
android:layout_height="237dp"
android:layout_gravity="center"
android:layout_marginTop="40dp"
android:src="#drawable/unnamed"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="59dp" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.constraint.ConstraintLayout>

Take a look at this situation. if you use the linear layout as match_parent then don't get the layout width. Use wrap_content. If its don't work then set the fixed size for your image.
<HorizontalScrollView android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="15dp"
android:layout_marginBottom="2dp"
android:fillViewport="true"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout
android:id="#+id/lyt_items"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/iv_icon1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:contentDescription="#string/app_name"
android:layout_marginRight="1dp"
android:src="#mipmap/ic_launcher" />
<ImageView
android:id="#+id/iv_icon2"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:contentDescription="#string/app_name"
android:layout_marginRight="1dp"
android:src="#mipmap/ic_launcher" />
<ImageView
android:id="#+id/iv_icon3"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:contentDescription="#string/app_name"
android:layout_marginRight="1dp"
android:src="#mipmap/ic_launcher" />
</LinearLayout>
</HorizontalScrollView>

One layout over another layout

I need one layout over another layout (they can have any heights), like this:
When screen become smaller, I need that brown layout become lower, like this:
I have this code to do this:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
<FrameLayout
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_gravity="top|center_horizontal"
android:background="#dd6600">
<TextView
android:layout_width="wrap_content"
android:layout_height="100dp"
android:text="One"/>
</FrameLayout>
<FrameLayout
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:background="#bbbbbb">
<TextView
android:layout_width="wrap_content"
android:layout_height="150dp"
android:text="Another"/>
</FrameLayout>
</FrameLayout>
On small heights it works fine, but on big screens I have this:
Can you help me please with this?

you could benefit from CoordinatorLayout here to do such effects

Use Linear layout with percentage weights, so that percent of screen covered will always be same despite of resolution as in
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="top"
android:orientation="vertical"
android:weightSum="1">
<FrameLayout
android:layout_width="100dp"
android:layout_height="0dp"
android:layout_weight ="0.6"
android:layout_gravity="top|center_horizontal"
android:background="#dd6600">
<TextView
android:layout_width="wrap_content"
android:layout_height="100dp"
android:text="One"/>
</FrameLayout>
<LinearLayout/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="bottom"
android:orientation="vertical"
android:weightSum="1">
<FrameLayout
android:layout_width="150dp"
android:layout_height="0dp"
android:layout_weight ="0.6"
android:layout_gravity="bottom|center_horizontal"
android:background="#bbbbbb">
<TextView
android:layout_width="wrap_content"
android:layout_height="150dp"
android:text="Another"/>
</FrameLayout>
</LinearLayout/>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
<FrameLayout
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_gravity="top|center_horizontal"
android:background="#dd6600">
<TextView
android:layout_width="wrap_content"
android:layout_height="100dp"
android:text="One"/>
</FrameLayout>
<FrameLayout
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginTop="70dp"
android:background="#bbbbbb">
<TextView
android:layout_width="wrap_content"
android:layout_height="150dp"
android:text="Another"/>
</FrameLayout>
Use RelativeLayout and add android:layout_marginTop="70dp" to second child of RelativeLayout. You can change margin as per your requirement.