Develop Reference

Why custom drawable not showing in android

TextView is added to the screen
<TextView
android:id="#+id/eventDetail_SpecialInfos"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="4dp"
android:fontFamily="#font/source_sans_pro"
android:text="Special Info"
android:drawableBottom="#drawable/information_underline"
android:textColor="#color/colorBlack"
android:textSize="14dp" />
information_underline drawable is :
<stroke
android:width="20dp"
android:color="#color/colorBlack" />

Check the #Suraj answer.
An alternative could be to use a TextInputLayout in the Material Component Library with a OutlinedBox style.
Something like:
<com.google.android.material.textfield.TextInputLayout
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
..>
<com.google.android.material.textfield.TextInputEditText
../>
</com.google.android.material.textfield.TextInputLayout>

Drawable you have created is not the right way to do that and use the below code to draw anything in bottom of textview
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<size
android:height="1dp"
android:width="100dp" />
<solid android:color="#android:color/black" />
</shape>

How to change a button shape style at runtime?

I am developing an app in java, android studio, where the user can choose the style color of the app.
With most components just use the .setBackground(colorUser);
The problem is in my buttons.
My buttons are all rounded, I created a shape for that.
My shape is in other file...
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="10dp"
android:shape="rectangle">
<solid android:color="#color/colorJetway" />
<corners
android:bottomLeftRadius="80dp"
android:bottomRightRadius="80dp"
android:topLeftRadius="80dp"
android:topRightRadius="80dp" />
</shape>
<Button
android:id="#+id/btnAdc"
android:layout_width="84dp"
android:layout_height="84dp"
android:layout_marginTop="12dp"
android:layout_marginEnd="205dp"
android:background="#drawable/btns_border"
android:onClick="btnAdicionar_click"
android:text="+"
android:textColor="#FFFFFF"
android:textSize="40dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/txtQuantidade" />
That way if at runtime I make mybutton.setBackground(colorUser) my button loses its style ... it will have no rounded edges.
How can I do it?

It is not exactly what you are looking for.
However using the MaterialButton component it is very simple to have rounded buttons.
Just use app:cornerRadius to define the corner radius and app:backgroundTint to change the background color.
<com.google.android.material.button.MaterialButton
app:backgroundTint="#color/myselector"
app:cornerRadius="xxdp"
.../>
You can programmatically change these values using:
button.setCornerRadius(...);
button.setBackgroundTintList(..);

if your colors is limited you can create some drawables with the colors you want.
for example :
blackButton.xml :
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="10dp"
android:shape="rectangle">
<solid android:color="#color/black" />
<corners
android:bottomLeftRadius="80dp"
android:bottomRightRadius="80dp"
android:topLeftRadius="80dp"
android:topRightRadius="80dp" />
whiteButton.xml :
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="10dp"
android:shape="rectangle">
<solid android:color="#color/white" />
<corners
android:bottomLeftRadius="80dp"
android:bottomRightRadius="80dp"
android:topLeftRadius="80dp"
android:topRightRadius="80dp" />
and when you want change your button's background just use button.setBackground(getResources().getDrawable(R.drawable.blackButton)) or button.setBackground(getResources().getDrawable(R.drawable.whiteButton))

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 :

Button and background margin shifted

I am using android studio, and I try to do some work on UI using some buttons.
I have created a background for some buttons, but when I apply this background on the buttons, the text inside the butons is not centered.
I think the marginof the button remains the same, whereas the applied background creates a smaller square than the marginn of the button. I don't know how to make the margin of the button fit the margin of the square coded in the background xml file.
Here the picture of the problem :
pic1
Here is the code of the background (bg_rectangle_grey.xml) :
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:width="#dimen/_34sdp" android:height="#dimen/_34sdp">
<shape android:shape="rectangle">
<stroke android:width="1dp" android:color="#ff6c7780" />
<corners android:radius="3dp" />
</shape>
</item>
</layer-list>
And here is the code of the xml file with the button :
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="#dimen/_15sdp"
android:style="?android:attr/buttonBarStyle">
<Button
android:style="?android:attr/buttonBarButtonStyle"
android:background="#drawable/bg_rectangle_grey"
android:id="#+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="M" />
I have looked for answers on google but it was never exactly what I am looking for.
If anyone can help.
Thank you in advance

Just use gravity center in button
<Button
android:style="?android:attr/buttonBarButtonStyle"
android:background="#drawable/bg_rectangle_grey"
android:id="#+id/button4"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="M" />

Please remove android:width="#dimen/_34sdp" android:height="#dimen/_34sdp" from below code and try again.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:width="#dimen/_34sdp" android:height="#dimen/_34sdp">
<shape android:shape="rectangle">
<stroke android:width="1dp" android:color="#ff6c7780" />
<corners android:radius="3dp" />
</shape>
</item>
</layer-list>

Change spinner background color but keep arrow

I've read several thing about it but I can't find what I need.
I want to keep the grey arrow but I want to remove the horizontal bar from the default style and have a white background. Do you have any idea of how I can do this ?
Here is what I have now (default spinner style) :
Here is what I want :

I did a little modification based on #Mansur Khan 's answer.
We don't have to add an ImageView in this case because the spinner already has a triangle arrow. So check the code below:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
android:background="#FFFFFF">
<Spinner
style="#style/Widget.AppCompat.DropDownItem.Spinner"
android:layout_width="match_parent"
android:layout_height="70dp"
android:id="#+id/sign_up_country"
/>
</RelativeLayout>
Here is the screenshot
Before:
After:

For the record, I found an easy solution : Wrap your spinner in a relative layout and add an image :
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#drawable/borderbottom_white"<!-- white background with bottom border -->
android:layout_marginTop="15dp" >
<Spinner
android:id="#+id/postfield_category"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:background="#null"
android:minHeight="0dp" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:src="#drawable/arrowspinner" />
</RelativeLayout>

A simple solution that doesn't require you to create your own drawable for the arrow is to wrap the spinner with a RelativeLayout, and set the background color in the RelativeLayout, not the spinner:
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#f00" >
<Spinner
android:id="#+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>

Use this:
yourspinner.setOnItemSelectedListener(this);
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
((TextView) yourspinner.getSelectedView()).setBackgroundColor(getResources()
.getColor(R.color.your_color));
}
and your class should implement OnItemSelectedListener.

Hi instead of wrapping Spinner component around Parent Layouts like LinearLayout, RelativeLayout etc which increases layout parsing simply create a drawable called spinner_bg.xml under drawable folder.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<bitmap
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="right"
android:src="#drawable/icn_dropdown_arw" />
</item>
</layer-list>
Set spinner_bg as the background of your spinner and it works like charm:
<Spinner
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:background="#drawable/spinner_bg" />

I think the best way without doing complex layouts is this:
Use this xml for your spinner background and you are good to go!!!
<item android:state_pressed="true">
<shape>
<solid android:color="#color/materialBlueGray600" />
<corners android:radius="3dp" />
</shape>
</item>
<item android:state_selected="true">
<shape>
<solid android:color="#color/materialGray50" />
<corners android:radius="3dp" />
</shape>
</item>
<item>
<layer-list>
<item>
<shape>
<solid android:color="#color/materialGray50" />
<corners android:radius="3dp" />
</shape>
</item>
<item android:gravity="right">
<bitmap android:antialias="true" android:gravity="right" android:src="#drawable/ic_expand_small" />
</item>
</layer-list>
</item>

Here is the code of custom spinner. Please check it out and tell me. Not yet I tested this. So please inform me after checking this whether it solves your problem.
<Spinner
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/spinner_background"
android:gravity="center"
android:paddingRight="10dp"
android:spinnerMode="dropdown"
android:textColor="your text color"
android:textSize="your text size" />
Here is the drawable(spinner_background.xml) to create the background of spinner.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape android:shape="rectangle" >
<solid android:color="border color" />
<corners android:radius="3dp" />
</shape>
</item>
<item
android:bottom="1dp"
android:left="1dp"
android:right="1dp"
android:top="1dp">
<shape android:shape="rectangle" >
<solid android:color="#android:color/white" />
<corners android:radius="3dp" />
</shape>
</item>
</layer-list>
Edit:
please check this link which gives you an idea to do.
Customize spinner background
OR
you can do something like this.
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="spinner background image">
<Spinner
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#null"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:src="arrow image" />
</RelativeLayout>

below layout will create a background in spinner with desire color drop down arrow
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".6"
android:background="#drawable/edit_text_rounded_shape"
android:gravity="center|center_vertical">
<Spinner
android:id="#+id/spinerComanyName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:padding="4dp"
android:layout_weight=".6"
android:layout_gravity="center"
android:entries="#array/spinner_item"
android:spinnerMode="dropdown"
android:theme="#style/Spinner"
/>
</LinearLayout>
<style name="Spinner">
<!-- Used for the bottom line when not selected / focused -->
<item name="colorControlNormal">#color/black</item>
<item name="colorControlActivated">#color/colorPrimary</item>
<!-- colorControlActivated & colorControlHighlight use the colorAccent color by default -->
</style>
edit_text_rounded_shape which provide background color and rounded corner
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" android:padding="10dp">
<solid android:color="#color/white"/>
<stroke android:color="#color/grey"/>
<corners
android:bottomRightRadius="15dp"
android:bottomLeftRadius="15dp"
android:topLeftRadius="15dp"
android:topRightRadius="15dp"/>
</shape>

A good way to customise spinners and any other Android controls is to use the Android Asset Studio site and choose the Android Holo Colors Generator. This will create all the assets you might need, including the "underline". It also generates the XML files that implement the changes.
Once you download the ZIP file from that site, you just copy the images and XML files into your project.
You can then edit the required image files to remove the underline. They are 9-Patch files, called:
apptheme_spinner_default_holo_light.9.png
apptheme_spinner_disabled_holo_light.9.png
apptheme_spinner_focused_holo_light.9.png
apptheme_spinner_pressed_holo_light.9.png
For a more complete explanation of the process, and to see some of the sample XML files, please refer to my related answer:
Change colour of small triangle on spinner in android

android:layout_alignParentRight="true"
android:layout_width="#dimen/spinner_width"
android:layout_height="wrap_content"
android:id="#+id/spnLocation"
android:entries="#array/labelFamily"
android:layout_centerVertical="true"
android:backgroundTint="#color/color_gray"
this work for me

Always while working with spinners, buttons and EditTexts and also needing to insert a drawable, I often wrap the element (spinner, EditText etc.) in a FrameLayout. Check an example:
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Spinner
android:id="#+id/spinner_component"
android:layout_width="match_parent"
android:layout_height="45dp"
android:background="#drawable/your_rectangle_style"
android:textColor="#color/your_text_color" />
<ImageView
android:layout_width="11dp"
android:layout_height="9dp"
android:src="#drawable/arrow_spinner"
android:layout_gravity="right|center_vertical"
android:layout_marginRight="7dp" />
</FrameLayout>
Another important tip is that FrameLayout allows you to set OnClick functions on the drawable, for instance.