app/src/main/res/values/styles.xml
<resources>
<!-- frame_2 styles -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<!-- Custom AlertDialog style -->
<style name="CustomAlertDialog" parent="Theme.AppCompat.Light.Dialog.Alert">
<!-- Customize your theme here. -->
<item name="colorAccent">@color/colorAccent</item>
<item name="android:textColorPrimary">@color/colorPrimary</item>
</style>
<style name="CustomScrollBar" >
<item name="android:scrollbarThumbVertical">@color/main_app_color</item>
</style>
<style name="DatePickerDialogTheme" parent="Theme.AppCompat.Light.Dialog">
<!-- Customize your theme here. -->
<item name="colorAccent">@color/main_app_color</item> <!-- color of the datepicker selection and buttons -->
<item name="android:datePickerDialogTheme">@style/MyDatePickerDialogTheme</item>
<item name="android:textColorPrimary">@color/main_app_color</item>
<item name="android:windowMinWidthMajor">90%</item>
<item name="android:windowMinWidthMinor">90%</item>
<item name="android:buttonBarButtonStyle">@style/MyButtonStyle</item> <!-- Add this line -->
</style>
<style name="MyButtonStyle" parent="Widget.AppCompat.Button.ButtonBar.AlertDialog">
<item name="android:textColor">@color/main_app_color</item>
</style>
<style name="MyDatePickerDialogTheme" parent="Theme.AppCompat.Light.Dialog">
<item name="android:windowBackground">@drawable/custom_dialog_background</item> <!-- Here, the custom_dialog_background is the same one you created for AlertDialog with rounded corners and custom color.-->
</style>
</resources>