Xamarin.Android Auto-Fit TextView

Auto fit text view for Xamarin.Android that works in almost all scenarios and is being already used inone of the production application

The sample project already includes the basic information to get you started.

HOW TO USE

XAML

<AutoResizeTextView.Controls.AutoFitTextView
  android:id="@+id/autoFitTextView"
  android:background="@android:color/white"
  android:textColor="@android:color/black"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:paddingBottom="10dp"/>

CS

protected override void OnCreate(Bundle bundle)
{
    base.OnCreate(bundle);

    // Set our view from the "main" layout resource
    SetContentView(Resource.Layout.Main);

    // Get controls
    EditText editTextView = FindViewById<EditText>(Resource.Id.editTextView);
    AutoFitTextView autoFitTextView = FindViewById<AutoFitTextView>(Resource.Id.autoFitTextView);

    // Make auto fit text view to calculate size dynamically
    // Do not use this feature if you do not want to resize the text view over and over again
    autoFitTextView.TextSizeHelper.IsDynamic = true;

    // Following functions helps you set other properties
    //************//
    autoFitTextView.SetMaxTextSize(80);
    autoFitTextView.SetMinTextSize(12);

    // Following enum has been created to group certain text views that should have the same text size
    // For example, a view that should currency rates may have different lengths
    // To achieve a UI that allows all these textview to have same text size
    // Set the fieldValueType to a same enum value
    //************//
    autoFitTextView.TextSizeHelper.fieldValueType = FieldValueType.GeneralText;

    // Use the following piece of code to clear the resized controls cache
    // In above example, we discussed how a view with currencies would like same text size
    // Once you move between different content views, you may want to retain or recalculate the FieldValueType's text size
    // If you wish to re-calculate the text size, clear the resized controls list
    // If you wish to retain the text size - do not do anything with the resized controls list
    //************//
    AutoResizeHelper.resizedControls.Clear();

    // You may not need to do so, but if you want to be able to manually trigger the text size calculation
    // You can do that using the following command
    //************//
    autoFitTextView.TextSizeHelper.AdjustTextSizeIfRequired();

    // PLAY WITH THE FOLLOWING TO ACHIEVE THE DESIRED BEHAVIOR
    autoFitTextView.SetMaxLines(0);
    autoFitTextView.SetSingleLine(true);

    editTextView.TextChanged += (sender, args) =>
    {
        autoFitTextView.Text = editTextView.Text;
    };   
}

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