How to make a custom TextView?

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.widget.TextView;

public class FontTextView extends TextView {


    public FontTextView(Context context) {
      super(context);
      Typeface face=Typeface.createFromAsset(context.getAssets(), "Helvetica_Neue.ttf"); 
      this.setTypeface(face); 
    }

    public FontTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
     Typeface face=Typeface.createFromAsset(context.getAssets(), "Helvetica_Neue.ttf"); 
  this.setTypeface(face); 
    }

    public FontTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
     Typeface face=Typeface.createFromAsset(context.getAssets(), "Helvetica_Neue.ttf"); 
  this.setTypeface(face); 
    }

    protected void onDraw (Canvas canvas) {
        super.onDraw(canvas);
        
       
    }

}

and in xml:

<com.util.FontTextView
                    android:id="@+id/textView2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/accountInfoText"
                    android:textColor="#727272"
                    android:textSize="18dp" />

Create a Custom View for Textview.

1. Make the entry in the attrs.xml file and give an option to select Font as a list in custom TextView.

   ....

2. Create the enum entry with a list of fonts and assign unique values

3. Make entries of all fonts in strings.xml

   Roboto-Bold Roboto-Medium Roboto-Light Roboto-Regular Roboto-Thin Roboto-Italic

4. Create an asset folder and copy all the necessary font you want to put in the font folder

5. Create a class extending TextView

   import android.content.Context;
   import android.content.res.TypedArray;
   import android.graphics.Typeface;
   import android.util.AttributeSet;
   import android.widget.TextView;
   
   /**
   * Created by ANKIT 
   */
   public class CustomFontTextView extends TextView {
   
   String customFont;
   
   public CustomFontTextView(Context context, AttributeSet attrs) {
       super(context, attrs);
       style(context, attrs);
   }
   
   public CustomFontTextView(Context context, AttributeSet attrs, int defStyle) {
       super(context, attrs, defStyle);
       style(context, attrs);
   
   }
   
   private void style(Context context, AttributeSet attrs) {
   
       TypedArray a = context.obtainStyledAttributes(attrs,
               R.styleable.CustomFontTextView);
       int cf = a.getInteger(R.styleable.CustomFontTextView_fontName, 0);
       int fontName = 0;
       switch (cf)
       {
           case 1:
               fontName = R.string.Roboto_Bold;
               break;
           case 2:
               fontName = R.string.Roboto_Italic;
               break;
           case 3:
               fontName = R.string.Roboto_Light;
               break;
           case 4:
               fontName = R.string.Roboto_Medium;
               break;
           case 5:
               fontName = R.string.Roboto_Regular;
               break;
           case 6:
               fontName = R.string.Roboto_Thin;
               break;
           default:
               fontName = R.string.Roboto_Regular;
               break;
       }
   
       customFont = getResources().getString(fontName);
   
       Typeface tf = Typeface.createFromAsset(context.getAssets(),
               "font/" + customFont + ".ttf");
       setTypeface(tf);
       a.recycle();
   }
   }
   

You can use this custom class this way. .. use your packageName.ClassName

 <ankit.com.customui.CustomFontTextView
  android:layout_width="match_parent"
  android:text="Hello World Ankit"
  android:textSize="16sp"
  app:fontName="Roboto_Medium"
  android:layout_height="wrap_content"/>

add below styleable in res/values/attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="CustomFontTextView">
        <attr name="fontName" format="string" />
    </declare-styleable>
</resources>