Develop Reference

Android Theme style not applying for Button

On my application style not applying, It shows like this,
Here is the code I am using,
-----AndroidManifest.xml-----
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
----themes.xml-----
<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Primary brand color. -->
<item name="colorPrimary">#color/white</item>
<item name="colorPrimaryVariant">#color/white</item>
<item name="colorOnPrimary">#color/text_gray</item>
<!-- Secondary brand color. -->
<item name="colorSecondary">#color/white</item>
<item name="colorSecondaryVariant">#color/white</item>
<item name="colorOnSecondary">#color/text_gray</item>
<item name="android:textViewStyle">#style/Regular_TextView</item>
<item name="buttonStyle">#style/Rounded_Gray_Button</item>
</style>
<style name="Rounded_Gray_Button" parent="android:Widget.Button">
<item name="android:gravity">center</item>
<item name="android:minWidth">100dp</item>
<item name="minHeight">40dp</item>
<item name="font">#font/sf_ui_display_bold</item>
<item name="android:textSize">16dp</item>
<item name="background">#drawable/rounded_dark_gray_bg</item>
<item name="android:textColor">#color/white</item>
</style>
<style name="Rounded_Gray_Stroke_Button" parent="android:Widget.Button">
<item name="android:gravity">center</item>
<item name="android:minWidth">100dp</item>
<item name="minHeight">40dp</item>
<item name="font">#font/sf_ui_display_bold</item>
<item name="android:textSize">16dp</item>
<item name="background">#drawable/rounded_dark_gray_stroke</item>
<item name="android:textColor">#color/dark_gray</item>
</style>
</resources>
Button Backgrounds
----rounded_dark_gray_bg.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/dark_gray" />
<solid android:color="#color/dark_gray" />
<corners android:radius="6dp" />
</shape>
</item>
</layer-list>
---rounded_dark_gray_stroke.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/dark_gray" />
<solid android:color="#color/white" />
<corners android:radius="6dp" />
</shape>
</item>
</layer-list>
I am applying the above button style on the below xml file,
<?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:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="horizontal"
android:gravity="center"
android:padding="10dp">
<Button
android:id="#+id/btnSignin"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:theme="#style/Rounded_Gray_Button"
android:text="#string/Sign_in"/>
<Button
android:id="#+id/btnRegister"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:theme="#style/Rounded_Gray_Stroke_Button"
android:text="#string/Register"/>
</LinearLayout>
</RelativeLayout>

To apply background we need to replace <item name="background">#drawable/rounded_dark_gray_bg</item> with <item name="android:background">#drawable/rounded_dark_gray_bg</item> on themes.xml
Also to apply we need to use like,
style="#style/Rounded_Gray_Button"
style="#style/Rounded_Gray_Stroke_Button"

You shouldn't set the theme on individual components. You should set the themed attribute you defined: buttonStyle, as the style of the component:
style="?buttonStyle"
... or you can reference the style directly, but then it can't change with the theme (unless the attributes within the style reference themed attributes)
style="#style/Rounded_Gray_Button"

How do I make the rounded corners of the menu in the toolbar?

This is my toolbar.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.Toolbar
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/toolbar"
android:layout_width="match_parent"
android:layout_height="#dimen/_40sdp"
android:background="#android:color/holo_red_dark"
android:gravity="center_vertical"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:popupTheme="#style/PopUpTheme"/>
This is how I customized the popup menu in style.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
<style name="PopUpTheme" parent="ThemeOverlay.AppCompat.Light">
<item name="android:popupBackground">#drawable/background_popup_menu</item>
</style>
</resources>
background_popup_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#android:color/white" />
<corners android:radius="5dp" />
</shape>
That's what I get in the end.
But I need to do like this

You can change the background of the overflow menu defining in your app theme the actionOverflowMenuStyle attribute.
<style name="AppTheme" parent="Theme.MaterialComponents.DayNight">
<item name="actionOverflowMenuStyle">#style/popupOverflowMenu</item>
</style>
With:
<style name="popupOverflowMenu" parent="#style/Widget.MaterialComponents.PopupMenu.Overflow">
<item name="android:popupBackground">#drawable/my_mtrl_popupmenu_background</item>
</style>
Then define the drawable/my_mtrl_popupmenu_background.xml with something like:
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="?attr/colorSurface"/>
<corners
android:bottomLeftRadius="8dp"
android:bottomRightRadius="8dp"
android:topLeftRadius="8dp"
android:topRightRadius="8dp"/>
</shape>

But you have rounded corners :) Just try to increase a value of radius like <corners android:radius="25dp" />.

Android Gradient Background drawable does not work

I've created this drawable resource, backgroundactivity, to use as my app's background:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<item
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<shape
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<gradient
android:angle="90"
android:startColor="#BFEFFF"
android:centerColor="#B0E2FF"
android:endColor="#82CFFD"
android:type="linear"/>
</shape>
</item>
</selector>
I want to set this background on all my activity, so I've tried to put this drawable resource in the styles.xml like this:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="android:actionBarStyle">#style/MyActionBar</item>
<item name="android:background">#drawable/backgroundactivity</item>
</style>
<style name="MyActionBar" parent="#android:style/Widget.Holo.Light.ActionBar">
<item name="#android:background">#color/colorPrimary</item>
</style>
</resources>
But in this way it didn't work: the background still stay white as default. I've also tried to replace android:background with android:windowBackground, but it causes my application to be completely black.
Thanks in advance!

Try to use windowBackground instead of background
<item name="#android:windowBackground">#color/colorPrimary</item>

It worked by simply editing the background activity.xml to the following:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape>
<gradient
android:angle="90"
android:startColor="#BFEFFF"
android:centerColor="#B0E2FF"
android:type="linear" />
</shape>
</item>
</selector>

Change the color of a disabled button in android

Is there a way to change the color of a disabled button in android through styles or some other form ?
I currently have the following,
drawable/button_default.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/button_default_shape"/>
</selector>
drawable/button_default_shape.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#color/button_default_background"/>
<corners android:radius="3dp"/>
</shape>
values/styles.xml
<style name="AppTheme.Button">
<item name="android:background">#drawable/button_default</item>
<item name="android:textColor">#android:color/white</item>
<item name="android:textAllCaps">false</item>
<item name="android:paddingTop">10dp</item>
<item name="android:paddingBottom">10dp</item>
<item name="android:focusable">true</item>
<item name="android:clickable">true</item>
<item name="android:gravity">center</item>
<item name="android:textStyle">bold</item>
<item name="android:textSize">17sp</item>
<item name="android:textAppearance">#style/CustomFontAppearance</item>
</style>

You'll have to use a selector for different drawables in those states.
You can create a selector like this:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/your_enabled_drawable" android:state_enabled="true" />
<item android:drawable="#drawable/your_disabled_drawable" android:state_enabled="false" />
<!-- default state-->
<item android:drawable="#drawable/your_enabled_drawable" />
</selector>

Specify the color in selector for android:state_enabled="false" as drawable
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false">
<shape>
<solid android:color="#32ff09" />
</shape>
</item>
</selector>
And apply this drawable resource to background of button
<Button
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/drawble_name"
android:enabled="false"
android:text="Selector Applied Button" />

Try this -
drawable/bg_button.xml :-
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/bg_button_focused" android:state_selected="true"/>
<item android:drawable="#drawable/bg_button_pressed" android:state_pressed="true"/>
<item android:drawable="#drawable/bg_button_disabled" android:state_enabled="false" />
<item android:drawable="#drawable/bg_button_normal"/>
</selector>
After this just set background on your button like this -
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/bg_button"
android:text="Button"/>

UPDATE: For Android MaterialButton
For Android MaterialButton there are two solutions, one for SDK >= v21 and another for SDK < v21.
Here I am also giving how to change the text color of the button depending whether it is enabled or disabled.
First create two color selector .xml file in your color folder. One for button color and another for button text color. For example button_state_colors.xml for button color and button_text_state_colors.xml for text color.
Here are those two color files:
button_state_colors.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="true" android:color="#303F9F" />
<item android:state_enabled="false" android:color="#BBBBBB" />
</selector>
button_text_state_colors.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="true" android:color="#FFFFFF" />
<item android:state_enabled="false" android:color="#555555" />
</selector>
Now for all versions of Android SDK you can change the color of button and it's text using style like:
in style.xml:
<style name="Widget.AppTheme.MaterialButton" parent="Widget.MaterialComponents.Button">
<item name="backgroundTint">#color/button_state_colors</item>
<item name="android:textColor">#color/button_text_state_colors</item>
</style>
in layout.xml:
<com.google.android.material.button.MaterialButton
android:id="#+id/button"
style="#style/Widget.AppTheme.MaterialButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
Only for SDK >= 21 you can direct change button color without using style like:
<com.google.android.material.button.MaterialButton
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:backgroundTint="#color/button_state_colors"/>

Another way to achieve this is to create a color selector.
Create a file
res/color/your_color.xml
which looks like
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="#color/colorDisabledBackground" android:state_enabled="false" />
<item android:color="#color/colorEnabledBackground" />
</selector>
Then you may use it as a regular color
in a style:
<style name="YourStyle">
<item name="android:background">#color/your_color</item>
<item name="android:textColor">#android:color/black</item>
</style>
As well is in layouts, shapes or in code as etc.

Here is my code which works properly with button enable and disable state.
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="true" android:drawable="#drawable/ic_button_gradient"/>
<item android:state_enabled="false" android:drawable="#color/gray"/>
</selector>

Android cannot set default button style

I am trying to set a default background for all buttons in my application. The problem is the android:buttonStyle item does not seam to do anything.
If I set a style of #style/Button to any button, then the style is used but I want this to happen to all buttons that have no style explicitly supplied.
My themes.xml file is:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- the theme applied to the application or activity -->
<style
name="BBTheme"
parent="#android:style/Theme.Holo.Light.DarkActionBar">
<item name="android:windowBackground">#drawable/app_background</item>
<item name="android:actionBarStyle">#style/ActionBar</item>
<item name="android:buttonStyle">#style/Button</item>
</style>
</resources>
and my styles.xml file is:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- ActionBar styles -->
<style
name="ActionBar"
parent="#android:style/Widget.Holo.Light.ActionBar.Solid.Inverse">
<item name="android:background">#color/action_bar_background</item>
</style>
<!-- Button styles -->
<style
name="Button"
parent="#android:style/Widget.Button">
<item name="android:textColor">#android:color/white</item>
<item name="android:background">#drawable/button_background</item>
</style>
</resources>

Add the buttonstyles.xml inside your drawable folder call From Button, you can modify the style of button.
<Button
android:id="#+id/button6"
style="?android:attr/buttonStyleSmall"
android:layout_width="140dp"
android:layout_height="wrap_content"
android:layout_marginBottom="15dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="15dp"
android:background="#drawable/buttonstyles"
android:text="Cancel"
android:textColor="#fff" />
buttonstyles.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:startColor="#99d9fa"
android:endColor="#99d9fa"
android:angle="45"/>
<padding android:left="3dp"
android:top="3dp"
android:right="3dp"
android:bottom="3dp" />
<corners android:radius="15dp" />
</shape>