How to prompt user input with an AlertDialog?

This code creates an input-dialog with AlertDialog.Builder where a user can enter text in an EditText field and press on "Ok" and "Cancel". 

AlertDialog.Builder alert = new AlertDialog.Builder(this);

alert.setTitle("Title");

alert.setMessage("Message");

// Set an EditText view to get user input

final EditText input = new EditText(this);

alert.setView(input);

alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int whichButton) {

  String value = input.getText();

  // Do something with value!

  }

});

alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

  public void onClick(DialogInterface dialog, int whichButton) {

    // Canceled.

  }

});

alert.show();