Apply Custom Typeface in Editext in Whole Applicaiotn android

package com.abc;

import android.content.Context;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.EditText;

public class MyEditText extends EditText{
   
    //The image we are going to use for the Clear button
//    private Drawable imgCloseButton = getResources().getDrawable(R.drawable.clear_button_image);
    
    public MyEditText(Context context) {
        super(context);
        init();
    }

    public MyEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    public MyEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }
    
    void init() {
        
        // Set bounds of the Clear button so it will look ok
//        imgCloseButton.setBounds(0, 0, imgCloseButton.getIntrinsicWidth(), imgCloseButton.getIntrinsicHeight());

        // There may be initial text in the field, so we may need to display the  button
        handleClearButton();

        //if the Close image is displayed and the user remove his finger from the button, clear it. Otherwise do nothing
        this.setOnTouchListener(new OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {

                MyEditText et = MyEditText.this;

                if (et.getCompoundDrawables()[2] == null)
                    return false;
                
                if (event.getAction() != MotionEvent.ACTION_UP)
                    return false;
                
//                if (event.getX() > et.getWidth() - et.getPaddingRight() - imgCloseButton.getIntrinsicWidth()) {
//                    et.setText("");
//                    MyEditText.this.handleClearButton();
//                }
                return false;
            }
        });

        //if text changes, take care of the button
        this.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

                MyEditText.this.handleClearButton();
            }

            @Override
            public void afterTextChanged(Editable arg0) {
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }
        });
    }
    
    //intercept Typeface change and set it with our custom font
    public void setTypeface(Typeface tf, int style) {
        if (style == Typeface.BOLD) {
            super.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/opensans_bold_webfont.ttf"));
        }
        else {
            super.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/opensans_bold_webfont.ttf"));
        }
    }
    
    void handleClearButton() {
        if (this.getText().toString().equals(""))
        {
            // add the clear button
            this.setCompoundDrawables(this.getCompoundDrawables()[0], this.getCompoundDrawables()[1], null, this.getCompoundDrawables()[3]);
        }
        else
        {
            //remove clear button
//            this.setCompoundDrawables(this.getCompoundDrawables()[0], this.getCompoundDrawables()[1], imgCloseButton, this.getCompoundDrawables()[3]);
        }
    }
}

In XML File
 <com.abc.MyEditText
                android:id="@+id/edtt"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/txt_title_amount"
               />