AlertDialog.Builder loginBuilder = new AlertDialog.Builder(this);        
		loginBuilder.setCancelable(false)
		.setTitle("Login Panel");
		
		LayoutInflater inflater=getLayoutInflater();
		
		//adding the inflater object to the view
		
		View view=inflater.inflate(R.layout.login_form, null);

		final EditText emailId=(EditText)view.findViewById(R.id.editText_mailId);
		final EditText passCode=(EditText)view.findViewById(R.id.editText2_passcode);

		loginBuilder.setView(view);

		loginBuilder.setPositiveButton("Login", new DialogInterface.OnClickListener() {

			public void onClick(DialogInterface dialog, int which) {
				// TODO Auto-generated method stub
				//do something 
			}
		});
		
		loginBuilder.setNegativeButton("Register", new DialogInterface.OnClickListener() {

			public void onClick(DialogInterface dialog, int which) {
				// TODO Auto-generated method stub
				makeAToast("You have to Register first");
				finish();
			}
		})
		.show();


R.layout.login_form::

<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/relativeLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/login_alert_shape">

    <EditText
        android:id="@+id/editText_mailId"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="24dp"
        android:hint="MailId"
        android:inputType="textEmailAddress" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/editText2_passcode"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText_mailId"
        android:layout_below="@+id/editText_mailId"
        android:layout_marginTop="23dp"
        android:hint="Password"
        android:inputType="textPassword" />

</RelativeLayout>


"@drawable/login_alert_shape:::


<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
	android:shape="rectangle">

	<gradient android:angle="45" android:endColor="#063F61"
		android:startColor="#1478B3" />

	<padding android:bottom="10dp" android:left="10dp"
		android:right="10dp" android:top="10dp" />



</shape>