Can I set default button is clicked or selected in android?

Question

I want to do something like when I start the activity, "button A" is clicked ( or selected) as default , a String will be shown immediately in the textview. And there is another Button, "button B". When I click on it, "button A" isSelected set to be false and "button B" isSelected set to be true, show required "button b" text.

I am already done the button change text when isSelected(), I just cannot set one of it as default "clicked" or "selected", can anyone help?

Answer 1

I consider you can use RadioGroup for this case. More details here

Answer 2

您在找这个吗？

mButton.setSelected(true);

Answer 3

您可以创建该按钮的OnClick函数，然后在onCreate（）中调用它。