Basically you need to use an element called a ViewPager
, and every page will be a different Fragment
. You can use this library to help you. Feel free to ask questions and guidance.
Edit - Detailed explanation:
Add two images to your drawable folder- one of the unselected dot, and one of the selected dot. Add these two NuGet packages (Right-Click your project in the Solution Explorer, click Manage NuGet Packages, and search): Xamarin.Android.Support.v4 and Xamarin.Android.Support.v7.AppCompat.
Then your Main.axml layout, put this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="@style/ThemeOverlay.AppCompat"
app:titleMarginTop="15dp"/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<LinearLayout
android:id="@+id/viewPagerCountDots"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_gravity="bottom|center_horizontal"
android:orientation="horizontal">
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_margin="10dp"
android:src="@drawable/ViewPagerDotSelected"/>
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_margin="10dp"
android:src="@drawable/ViewPagerDotUnselected"/>
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_margin="10dp"
android:src="@drawable/ViewPagerDotUnselected"/>
</LinearLayout>
</FrameLayout>
</LinearLayout>
You can play around with the width, the height, and the margin later.
Next, create new Fragments that will each contain your different pages (or "steps"). For this example, I created three.
Do this three times, while changing the name of the files and their contents:
Right-Click Project >> Add >> New Item >> Fragment, post the following code as an example:
public class Fragment1 : Fragment
{
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
}
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
// Use this to return your custom view for this Fragment
var view = inflater.Inflate(Resource.Layout.Fragment1Layout, container, false);
//Here goes what you want to do within the fragment.
return view;
}
}
Replace the names of the class and layouts for each fragment.
Then Right-Click on your layout folder >> Add New Item >> Android Layout.
Post the following code as an example:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="FRAGMENT 1"
android:layout_gravity="center"/>
</LinearLayout>
Do this three times while changing the name and contents.
Now, in you MainActivity.cs, post the following code after your Namespace name:
[Activity(Label = "ViewPagerIndicator", MainLauncher = true, Icon = "@drawable/icon", Theme = "@style/Theme.AppCompat.Light.DarkActionBar")]
public class MainActivity : AppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
var toolbar = FindViewById<Android.Support.V7.Widget.Toolbar>(Resource.Id.toolbar);
SetSupportActionBar(toolbar);
SupportActionBar.Title = "ViewPager Indicator Dots";
var pager = new ViewPagerAdapter(SupportFragmentManager);
var viewPager = FindViewById<ViewPager>(Resource.Id.viewPager);
viewPager.Adapter = pager;
viewPager.PageSelected += ViewPager_PageSelected;
}
private void ViewPager_PageSelected(object sender, ViewPager.PageSelectedEventArgs e)
{
var viewPagerDotsLayout = FindViewById<LinearLayout>(Resource.Id.viewPagerCountDots);
for (int i = 0; i < viewPagerDotsLayout.ChildCount; i++)
{
ImageView dotImage = (ImageView)viewPagerDotsLayout.GetChildAt(i);
if (i == e.Position)
dotImage.SetImageResource(Resource.Drawable.ViewPagerDotSelected);
else
dotImage.SetImageResource(Resource.Drawable.ViewPagerDotUnselected);
}
}
}
public class ViewPagerAdapter : FragmentStatePagerAdapter
{
int numberOfFragments = 3;
public ViewPagerAdapter(Android.Support.V4.App.FragmentManager fm) : base(fm)
{
}
public override int Count
{
get
{
return numberOfFragments;
}
}
public override Android.Support.V4.App.Fragment GetItem(int position)
{
switch (position)
{
case 0:
return new Fragment1();
case 1:
return new Fragment2();
case 2:
return new Fragment3();
default: return new Fragment1();
}
}
}
Run it and see if it works...
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