Android TTS from code itself - not user input

I want to use the TTS service to speak out text messages I have written in the code itself such as:

header.setText("Hello!");

I saw TTS from user input, but I do not want this.

I have checked these links by the way:

http://ift.tt/1z2dfB2

http://ift.tt/1dxoqZa

But not really what I want.