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Styles & Themes in Android

A style is a collection of attributes that specify the look and format for a View. A style can specify attributes such as height, padding, font color, font size, background color, and much more.

We need to create your widget styles and add that in your app theme and finally add your app theme in manifest.

No need to mention the style in every view. like this Inside values folder in the styles file

The attributes related to style have been removed from the layout XML and put into a style definition called AppTheme, which is then applied using the android:theme attribute. To create the AppTheme style, save an XML file in the res/values/ directory of your project. Here is an example:


			

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="android:textViewStyle">@style/TextViewStyle</item>
</style>

<style name="TextViewStyle" parent="android:Widget.TextView">
<item name="android:background">@color/TextView_background</item>
<item name="android:textColor">#16F20A</item>
<item name="android:textStyle">bold</item>
</style>

In Your manifest file inside application tag add the below line.

<application
android:theme="@style/AppTheme">
</application>

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