java - API Demo - Text-to-Speech - How to Change the "Again" Button to Something Else -

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java newbie here. interested in learning programming android. i'm going through samples , tutorials on developer.android.com. using eclipse , android sdk developing. checking out apidemos , noticed when compiling texttospeechactivity file, , run in phone/emulator, able click on "again" button , have read aloud text in texttospeechactivity file. i'd know this.... cannot figure out button coming from, how getting labeled word "again" on , how knows placed in exact spot on phone/emulator screen. button being "built" java or actual file located someplace else? i've looked through various folders in apidemos project, have not been able locate graphic looks 1 showing on phone/emulator. 1 last thing, when rolling on button on phone/emulator, button turns grey orange. how button created, , how knows placed on page appreciated.

without looking @ in detail, think should looking xml file. understanding layout/components declared in xml files in android project.


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