[Solved] What is (button) in android? [duplicate]

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(Button) is a typecast. Every widget that comes back from findViewById is a View. To treat it as a button, you must explicitly tell the compiler that it is a Button.

More information on findViewById here, in the Android documentation:
http://developer.android.com/reference/android/app/Activity.html

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solved What is (button) in android? [duplicate]