Change TextSize of EditText programmically

package com.example.androidedittext;

import android.os.Bundle;
import android.app.Activity;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  final EditText input = (EditText)findViewById(R.id.input);
  input.setTextSize(28);
  
  SeekBar seekbarScale = (SeekBar)findViewById(R.id.sbsize);
  final TextView textScale = (TextView)findViewById(R.id.textsize);
  
  seekbarScale.setOnSeekBarChangeListener(new OnSeekBarChangeListener(){

   @Override
   public void onProgressChanged(SeekBar seekBar, int progress,
     boolean fromUser) {
    int size = progress+1;
    input.setTextSize(size);
    textScale.setText(String.valueOf(size));
   }

   @Override
   public void onStartTrackingTouch(SeekBar seekBar) {
    // TODO Auto-generated method stub
    
   }

   @Override
   public void onStopTrackingTouch(SeekBar seekBar) {
    // TODO Auto-generated method stub
    
   }});

 }

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="android-coding.blogspot.com" />
    
    <SeekBar 
        android:id="@+id/sbsize"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:max="50"
        android:progress="28"/>
    
    <TextView
        android:id="@+id/textsize"
     android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <EditText
        android:id="@+id/input"
     android:layout_width="match_parent"
        android:layout_height="wrap_content" />
 
</LinearLayout>