Relative Layout

Nello Styles appena creato, realizziamo questo.

styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

<item name="colorPrimary">@color/design_default_color_primary</item>
<item name="colorPrimaryDark">@color/design_default_color_primary_dark</item>
<item name="colorAccent">@color/design_default_color_surface</item>

</style>
</resources>

colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#3F51B5</color>
<color name="colorPrimaryDark">#303F9F</color>
<color name="colorAccent">#FF4081</color>
</resources>

→ Material Design opzioni

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="Theme.MaterialComponents">

<item name="colorPrimary">@color/design_default_color_primary</item>
<item name="colorPrimaryDark">@color/design_default_color_primary_dark</item>
<item name="colorAccent">@color/design_default_color_surface</item>

</style>
</resources>

Progettazione Material Design

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
{

}
else
{

}