Develop Reference

Resizing height in Shape Drawable

I have a shape drawable resource file.
it's the drawable.xml code below.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:left="-2dp"
android:bottom="-2dp"
android:top="-2dp">
<shape android:shape="rectangle">
<stroke android:width="#dimen/px02"
android:color="#color/white" />
</shape>
</item>
</layer-list>
and this is layout xml code.
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/gray333"
xmlns:app="http://schemas.android.com/apk/res-auto">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!!!"
android:textColor="#color/black"
android:background="#drawable/bg_category_border"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
and the result is this.
you can see the white bar on the left side.
and i want to make the bar size shorter top and bottom as high as the TextView's text.(the red line)
i tried to give a padding and size in the drawable.xml.
and i set android:includeFontPadding on the TextView.
but it didn't work.
how can i make it??

i was able to do it like this
It was little bit tricky to remove padding from bottom and top, but you can try the following xml and do some adjustments as u like.
bg_category_border.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item >
<shape android:shape="rectangle">
<stroke
android:width="1dp"
android:color="#color/white" />
</shape>
</item>
</layer-list>
layout xml
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#3C3C3C"
xmlns:app="http://schemas.android.com/apk/res-auto">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:background="#drawable/bg_category_border"
>
<TextView
android:textSize="50sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!!!"
android:includeFontPadding="false"
android:layout_marginBottom="-8dp"
android:layout_marginTop="-10dp"
android:textColor="#color/black"
/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

Gradient in xml doesn't occur on a button

I created a gradient in my Drawable Resource File (.xml) and then connected it to button's (in activity_main.xml) background. Unfortunately, all structures in this file didn't occur on this button. I am a beginner. Is this problem with the code or something else?
The gradient works as an ImageView and even as a Switch but does not work as a button's background.
Code from gradient.xml:
<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<item>
<shape>
<gradient
android:angle="90"
android:endColor="#b5b6d2"
android:startColor="#555994"
android:type="linear" />
<corners
android:radius="0dp"/>
<padding
android:right="10dp"
android:top="10dp"
android:bottom="10dp"
android:left="10dp"/>
</shape>
</item>
</selector>
activity_main.xml
<?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:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:background="#drawable/gradient"
android:text="#string/button"
android:textColor="#android:color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

You use selector when you want to show different background / color according to different states of the widget . For your case replace your code with this code in your drawable file :
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:angle="90"
android:endColor="#b5b6d2"
android:startColor="#555994"
android:type="linear" />
<corners
android:radius="0dp"/>
</shape>
Correction : The Button widget is taking colorAccent as default background strangely change the widget to AppCompatButton and it will solve the problem .
<?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">
<androidx.appcompat.widget.AppCompatButton
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:text="Button"
android:background="#drawable/gradient"
android:textColor="#android:color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

selectors are used to change the view when states change. You haven't supplied any states in your selector, so that's probably why it doesn't get applied.
If you want the gradient applied in all states, then remove the selector and item in the xml, and just provide the shape.

TextView with rounded corners displays correctly in xml file but not app?

I have a Textview on which I am trying to add rounded corners on.
My TextView:
<TextView
android:id="#+id/textview_answer_one"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:background="#drawable/rounded_corners"
android:elevation="4dp"
android:gravity="center"
android:text=""
app:layout_constraintBottom_toTopOf="#+id/guideline5"
app:layout_constraintEnd_toStartOf="#+id/guideline4"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline" />
and my Drawable file:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="#android:id/background">
<shape>
<corners android:radius="15dp" />
<solid android:color="#ffffff"/>
</shape>
</item>
</layer-list>
When I check in the XML Editor (I don't know what it's called) in Android Studio, you can clearly see that the TextView have rounded corners. However, when I run the app on my phone the TextView does not have rounded corners. How come? Any suggestions on what I might be doing wrong?

Try This Shape :
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<corners android:radius="20dp"/>
<padding android:left="10dp" android:right="10dp" android:top="10dp" android:bottom="10dp"/>
<solid android:color="#CCCCCC"/>
</shape>
Example Xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<TextView
android:background="#drawable/r"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text View"
android:textSize="20dp"
android:textColor="#FFFFFF"
android:gravity="center_horizontal"
/>
</LinearLayout>

Adding a colored shadow to a Button

I need to add a shadow to a Button with these attributes "from zeplin":
and this is the design
I tried this code
<Button
android:id="#+id/btn_sign_in"
android:layout_width="match_parent"
android:layout_height="48dp"
android:layout_marginTop="35dp"
android:background="#drawable/auth_button_shape"
android:shadowColor="#41ff4800"
android:shadowDx="0"
android:shadowDy="8"
android:text="#string/sign_in"
android:textAllCaps="true"
android:textColor="#android:color/white"
android:textSize="14sp" />
auth_button_shape
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#ff7c44" />
<corners android:radius="100dp" />
</shape>
But not worked and the other attributes "Blur" and "Spread" How I can set them for the button.
Thanks.

Thanks to Taras I have solution. You can use this library for creating colored shadow to button. Just place your view element inside shadow layout. Of course basic layout is ConstraintLayout.
Some pieces of code for example
<com.gigamole.library.ShadowLayout
android:id="#+id/shadowLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:sl_shadow_angle="90"
app:sl_shadow_color="#color/light_orange_color"
app:sl_shadow_distance="2dp"
app:sl_shadow_radius="7dp"
app:sl_shadowed="true">
<ImageView
android:id="#+id/ivYourImageName"
android:layout_width="144dp"
android:layout_height="44dp"
android:background="#drawable/button_shape"
android:foregroundGravity="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" />
</com.gigamole.library.ShadowLayout>
Button shape :
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<corners android:radius="2dp" />
<gradient android:angle="180" android:endColor="#ffc349" android:startColor="#ff8006" />
</shape>
</item>
</selector>
Result:

you need to add this line of code inside button tag
android:stateListAnimator="#null"
because button override any evelation value you set by passing null to android:stateListAnimator it will remove stateList attrs
for color you can add this line to show colored shadow
android:outlineSpotShadowColor="#303030"
check answer
Android elevation not showing shadow on Button

use AppCompatButton instead of Button,use elevation and use android:backgroundTint for button colour.
<android.support.v7.widget.AppCompatButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="sign_in"
android:backgroundTint="#ccd3e0ea"
android:elevation="4dp"/>
output is,

bg_test.xml :
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!--the shadow comes from here-->
<item
android:bottom="-6dp"
android:drawable="#android:drawable/dialog_holo_light_frame"
android:left="-6dp"
android:right="-6dp"
android:top="-6dp">
</item>
<item
android:bottom="-6dp"
android:left="-6dp"
android:right="-6dp"
android:top="-6dp">
<shape android:shape="rectangle">
<solid android:color="#color/white" />
<stroke
android:width="#dimen/_1sdp"
android:color="#color/yellow" />
</shape>
</item>
</layer-list>
Activity.xml code:
<Button
android:layout_width="#dimen/_150sdp"
android:layout_height="48dp"
android:layout_marginTop="10dp"
android:text="#string/sign_In"
android:layout_marginLeft="#dimen/_80sdp"
android:layout_gravity="center"
android:textSize="14sp"
android:background="#drawable/bg_test" />
Design Button :

SeekBar progressDrawable fitXY

I have a SeekBar with a progressDrawable.
<SeekBar
android:id="#+id/seekbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:progress="50"
android:progressDrawable="#drawable/image"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent" />
In this seekbar I used the image.png
My phone's screen is bigger, than this image. So I want to use this image like "fitXY" .
Actually it's multiply the image.
How can I set the image to match_parent?
Thank you !

Try this one
<SeekBar
android:id="#+id/seekbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:progress="50"
android:progressDrawable="#drawable/seekbar_bg"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent" />
Drawble folder
seekbar_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:left="300dip">
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<solid android:color="#0000FF" />
</shape>
</item>
<item android:right="400dip">
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<solid android:color="#ff0000" />
</shape>
</item>
</layer-list>

You can use 9-patch.
I just made it in paint, so probably there is some error, but hope you get the idea. Also you can make image smaller, to reduce its size.