smetlov

namespace CustomBottomMenu.Droid
{
    [Activity(Label = "CustomBottomMenu", Icon = "@drawable/icon", MainLauncher = true,
              ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation,
              Theme = "@style/AppTheme")]
    public class MainActivity : FormsAppCompatActivity
    {
        protected override void OnCreate(Bundle bundle)
        {
            ToolbarResource = Resource.Layout.toolbar;

smetlov

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:minHeight="?attr/actionBarSize"
    android:background="?attr/colorPrimary"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"

smetlov

public abstract class BaseContentPage : ContentPage
{
    public void SendAppearing()
    {
        OnAppearing();
    }

    public void SendDisappearing()
    {
        OnDisappearing();

smetlov

<?xml version="1.0" encoding="utf-8" ?>
<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:pages="clr-namespace:CustomBottomMenu.Pages;assembly=CustomBottomMenu"
             x:Class="CustomBottomMenu.Pages.MainPage">
  
  <pages:AboutPage Icon="ic_about" />
  <pages:ContactsPage Icon="ic_contact" />
  
</TabbedPage>

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public partial class MainPage
{
    public MainPage()
    {
        InitializeComponent();
    }

    protected override void OnCurrentPageChanged()
    {
        base.OnCurrentPageChanged();

smetlov

<?xml version="1.0" encoding="utf-8" ?>
<pages:BaseContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:pages="clr-namespace:CustomBottomMenu.Pages;assembly=CustomBottomMenu"
             x:Class="CustomBottomMenu.Pages.AboutPage"
             Title="About">
  
  <Label Text="About" VerticalOptions="Center" HorizontalOptions="Center" />
  
</pages:BaseContentPage>

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[assembly: ExportRenderer(typeof(MainPage), typeof(MainPageRenderer))]

namespace CustomBottomMenu.Droid.Renderers
{
    internal class MainPageRenderer : VisualElementRenderer<MainPage>, IOnTabClickListener
    {
        public MainPageRenderer()
        {
            // Required to say packager to not to add child pages automatically
            AutoPackage = false;

smetlov

<?xml version="1.0" encoding="utf-8" ?>
<resources>
  <style name="AppTheme" parent="AppTheme.Base">
  </style>
  <style name="AppTheme.Base" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/primary</item>
    <item name="colorPrimaryDark">@color/primaryDark</item>
    <item name="colorAccent">@color/accent</item>
    <item name="windowActionModeOverlay">true</item>
  </style>

smetlov

true & null   // Null
false & null  // False
true | null   // True
false | null  // Null