Disabling and Enabling Button

Here a simple method is available to enable and disable button that is

To Disable:
         setEnabled(false);
and

To Enable:
         setEnabled(true);

Example:
ScreenShot:

Before disabling button:

After disabling button:

acitvity_main.xml:

<RelativeLayout 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: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" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="43dp"
        android:text="Display Message"
        android:textSize="20sp" />

</RelativeLayout>


MainActivity.java:
package com.ram.disablingbutton;


import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

final Button b = (Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {

               //Disabling button
b.setEnabled(false);

Toast.makeText(getApplicationContext(),
"Look at the button it is desabled..",
Toast.LENGTH_LONG).show();

}
});
}

}