Android: How to set password property in an edit text?

I need to create a login form with 'username' 'password' fields and two buttons 'login' and 'cancel' in my android application.

I am using an alert dialog with edittext inside that.

This is the code I used to create password edittext..

     final EditText Password = new EditText(this);
     Password.setGravity(Gravity.CENTER);
     Password.setHint("Password");
     Password.setWidth(200);

     Password.setTransformationMethod(new PasswordTransformationMethod());
     login_alert.addView(Password);

My issue is that, plain text is shown instead of 'dots' when i open a softkeypad to edit the password. (It is shown as dots when not in softkeypad mode)

Can anyone suggest a solution?

Password.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);

This one works for me.
But you have to look at Octavian Damiean's comment, he's right.

This is deprecated

In xml of EditText iclude this attribute: android:password="true"

Edit

android:inputType="textPassword"

Here's a new way of putting dots in password

<EditText
    android:id="@+id/loginPassword"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:inputType="textPassword"
    android:hint="@string/pwprompt" /

add android:inputType = "textPassword"

You need to use PasswordTransformationMethod.getInstance() instead of new PasswordTransformationMethod().

The only way that worked for me using code (not XML) is this one:

etPassword.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
etPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());