Android Timers Crashing On Cancel
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ANSWER:
mailbutton = (Button) findViewById(R.id.emailbutton);
the above line must be in oncreate() because you have a view(R.layout.main) set in oncreate and you function addListenerOnButton() doesn’t know about main layout.
and if still want to it to be in your function then inflate the main.xml and do it.
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