Change action bar colors

Question

I need to change the colors of the action bar, but when I change these data in the Android app, it does not change colors dynamically (unlike in iOS).

I need when I

Answer 1

You need to create a custom theme in droid/resource/styles.xml. and also need to apply this theme in your MainActivity

Apply Theme on MainActivity

[Activity(Label = "YourProject.Droid", Icon = "@drawable/icon", Theme = "@style/MyTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity

Add a custom theme in Style.XML file

<?xml version="1.0" encoding="UTF-8"?>
<resources>
    <style name="MyTheme" parent="MyTheme.Base">
    </style>
    <!-- Base theme applied no matter what API -->
    <style name="MyTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
        <!--If you are using revision 22.1 please use just windowNoTitle. Without android:-->
        <item name="windowNoTitle">true</item>
        <!--We will be using the toolbar so no need to show ActionBar-->
        <item name="windowActionBar">false</item>
        <!-- Set theme colors from http://www.google.com/design/spec/style/color.html#color-color-palette-->
        <!-- colorPrimary is used for the default action bar background -->
        <item name="colorPrimary">#2196F3</item>
        <!-- colorPrimaryDark is used for the status bar -->
        <item name="colorPrimaryDark">#1976D2</item>
        <!-- colorAccent is used as the default value for colorControlActivated
             which is used to tint widgets -->
        <item name="colorAccent">#FF4081</item>
        <!-- You can also set icon, Title color -->
        <item name="android:textColorPrimary">#000000</item>
        <!-- You can also set colorControlNormal, colorControlActivated
             colorControlHighlight and colorSwitchThumbNormal. -->
        <item name="windowActionModeOverlay">true</item>
        <item name="android:datePickerDialogTheme">@style/AppCompatDialogStyle</item>
        <item name="android:actionBarPopupTheme">@style/CustomActionBarPopupTheme</item>
    </style>
    <style name="AppCompatDialogStyle" parent="Theme.AppCompat.Light.Dialog">
        <item name="colorAccent">#FF4081</item>
    </style>
    <style name="CustomActionBarPopupTheme" parent="android:ThemeOverlay.Material.Light">
        <item name="android:colorBackground">#FFFFFF</item>
        <item name="android:textColor">#000000</item>
    </style>
</resources>

For more understanding