Cant increase font size of textview

Question

Hi,

I'm trying to increase the font size of a TextView element in a layout. When viewing the preview in Visual Studio code editor, it looks fine however when I run the application it's always the same small size.

Code editor preview:

Actual:

View code:

<?xml version="1.0" encoding="utf-8"?>  
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="vertical"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    android:layout_weight="1">  
    <TextureView  
        android:id="@+id/cameraView"  
        android:layout_marginTop="-95dp"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content" />  
    <TextView  
        android:layout_width="fill_parent"  
        android:layout_height="70dp"  
        android:textAlignment="center"  
        android:id="@+id/txtDeviceCount"  
        android:text="Trackers Found: 0"  
        android:textSize="50dp"  
        android:textColor="#ffffff" android:background="#000" />  
    <ImageView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:scaleType="fitXY"  
        android:layout_gravity="center_vertical"  
        android:layout_marginHorizontal="80dp"  
        android:id="@+id/imgScannerBox"  
        android:background="@drawable/scannerbox"  
        android:layout_weight="0"  
        android:maxWidth="200dp"  
        android:minWidth="200dp"  
        android:maxHeight="200dp"  
        android:minHeight="200dp" />  
    <Button  
        android:id="@+id/takePhotoButton"  
        android:layout_width="65dp"  
        android:layout_height="65dp"  
        android:layout_marginBottom="15dp"  
        android:layout_gravity="center|bottom"  
        android:background="@drawable/scan_stop_button" />  
</FrameLayout>  

Answer 1

Instead of using a layout file, I created a custom renderer and wrote my UI code in there.

public class CameraPageRenderer : PageRenderer
{
    .....

    protected override void OnElementChanged(ElementChangedEventArgs<Page> e)
    {
            base.OnElementChanged(e);
            SetupUserInterface();
     }

     void SetupUserInterface()
        {
            mainLayout = new RelativeLayout(Context);
            liveView = new TextureView(Context);

            RelativeLayout.LayoutParams liveViewParams = new RelativeLayout.LayoutParams(
                RelativeLayout.LayoutParams.MatchParent,
                RelativeLayout.LayoutParams.MatchParent);
            liveView.LayoutParameters = liveViewParams;
            liveView.SurfaceTextureListener = this;
            mainLayout.AddView(liveView);

            txtDeviceCount = new TextView(Context);
            txtDeviceCount.TextSize = 20;
            txtDeviceCount.Text = "Trackers Found: 0";
            txtDeviceCount.SetTextColor(Android.Graphics.Color.White);
            RelativeLayout.LayoutParams txtDeviceCountParams = new RelativeLayout.LayoutParams(LayoutParams.MatchParent, LayoutParams.WrapContent);
            txtDeviceCount.TextAlignment = Android.Views.TextAlignment.Center;
            txtDeviceCount.LayoutParameters = txtDeviceCountParams;
            mainLayout.AddView(txtDeviceCount);

            AddView(mainLayout);
     }
}